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42B-1
GROUP 42B
KEYLESS OPERATION SYSTEM
(KOS)
CONTENTS
GENERAL INFORMATION............
SERVICE SPECIFICATIONS........
DIAGNOSIS.....................
STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING...............
DIAGNOSTIC FUNCTION...........
ID CODES REGISTRATION JUDGMENT TABLE
..............................
WARNING AND WARNING INDICATOR LIST
..............................
DIAGNOSTIC TROUBLE CODE CHART
..............................
DIAGNOSTIC TROUBLE CODE PROCEDURES
..............................
DTC B1731: Engine Control Module communication timeout...........
DTC B1761: VIN not programmed
................................
DTC B1A08 Keyless/KOS key1 performanceDTC B1A09 Keyless/KOS key2 performanceDTC B1A0A Keyless/KOS key3 performanceDTC B1A0B Keyless/KOS key4 performance.....................
DTC B1A10 Keyless/KOS key 1 low batteryDTC B1A11 Keyless/KOS key 2 low batteryDTC B1A12 Keyless/KOS key 3 low batteryDTC B1A13 Keyless/KOS key 4 low battery.........................
DTC B1A24: Key ID not registered
................................
DTC B1A25: Key ID unmatched.....
DTC B1A28: Engine control module authenticate error..............
DTC B1A35: Transponder read error
................................
DTC B2101: IG SW start POS.circuit
lowDTC B2102: IG SW start POS.circuit
high............................
DTC B2204: Coding data mismatch
................................
DTC B2206: VIN mismatch.........
DTC B2352: Antenna fail.........
DTC B2400: KOS key registration fail
................................
DTC B2401: Keyless/KOS key ID not registered......................
DTC B2402: STL unit comm.(system ID),
B2403: STL unit comm.(CRC), B2404: STL unit comm.(function code), B2405: STL unit comm.(rolling code), B2406: STL unit comm.(PTC operate), B2407: STL unit comm.(EEPROM), B2408: STL unit comm.(solenoid).................
DTC B2409: STL unit comm.(No response)
................................
DTC B240A FR antenna(outdoor) open
................................
DTC B240B FL antenna(outdoor) open
................................
Continued on next page
42B-2
DTC B240C Liftgate antenna(outdoor) open............................
DTC B240D Front antenna(indoor) open
................................
DTC B240E RR antenna(indoor) open
...............................
DTC B240F RL antenna(indoor) open
................................
DTC B2412 LF antenna power voltage
................................
DTC B2413: STL unit power voltage
................................
DTC B2414 Unlock sensor fail....
DTC B2415: RA module power voltage
................................
DTC B2416: ECU internal error
................................
DTC C1608: EEPROM Error.........
DTC C1900: No Registration......
DTC C1901: Vehicle Speed Information
Abnormality.....................
DTC C1910: Transmitter Low Battery
Voltage Abnormality 1DTC C1920:
Transmitter Low Battery Voltage
Abnormality 2DTC C1930: Transmitter
Low Battery Voltage Abnormality 3DTC
C1940: Transmitter Low Battery Voltage
Abnormality 4...................
DTC C1911: Reception Abnormality 1DTC
C1921: Reception Abnormality 2DTC
C1931: Reception Abnormality 3DTC
C1941: Reception Abnormality 4
................................
DTC C1912: Tire Inflation pressure
Warning 1DTC C1922: Tire Inflation pressure Warning 2DTC C1932: Tire
Inflation pressure Warning 3DTC C1942:
Tire Inflation pressure Warning 4
................................
DTC C1913: Acceleration Sensor
Abnormality 1DTC C1923: Acceleration
Sensor Abnormality 2DTC C1933:
Acceleration Sensor Abnormality 3DTC
C1943: Acceleration Sensor Abnormality
4...............................
DTC C1914: Pressure Sensor Abnormality
1DTC C1924: Pressure Sensor
Abnormality 2DTC C1934: Pressure
Sensor Abnormality 3DTC C1944:
Pressure Sensor Abnormality 4
................................
DTC U0019: Bus off(CAN-B).......
DTC U0141: ETACS-ECU CAN timeout
................................
DTC U0151: SRS-ECU CAN timeout
................................
DTC U0154: Occupant classification-ECU
CAN timeout.....................
DTC U0155: Combination meter CAN timeout.........................
DTC U0164: A/C-ECU CAN timeout
................................
DTC U0184: Audio CAN timeout....
DTC U0197: Hands free module CAN timeout........................
DTC U0245: Audio visual navigation unit
CAN timeout....................
DTC U1412: Implausible Vehicle Speed
Signal Received................
DTC U1415: Coding not completed/Data fail...........................
Code No.U1417 Implausible coding data
...............................
TROUBLE SYMPTOM CHART........
SYMPTOM PROCEDURES...........
Inspection Procedure 1: Cannot communicate with KOS-ECU using the scan tool...........................
Inspection Procedure 2: Abnormality in
KOS-ECU power supply and ground circuits.......................
Inspection Procedure 3: Keyless operation warning display does not disappear......................
Inspection Procedure 4: IG knob will not turn (keyless operation is not recognized)....................
Inspection Procedure 5: The engine will not start with KOS (IG knob operates normally)......................
Continued on next page
42B-3
INSPECTION PROCEDURE 6: No Door will be
Locked or Unlocked by Operating A Lock
Switch On Any Door, or by touching The
Unlock Sensor..................
INSPECTION PROCEDURE 7: Driver's Door
Lock Switch does not Work......
INSPECTION PROCEDURE 8: Driver's Door
Unlock Sensor does not Work....
INSPECTION PROCEDURE 9: Front
Passenger's Door Lock Switch does not
Work...........................
INSPECTION PROCEDURE 10: Front
Passenger's Door Unlock Sensor does not
Work...........................
INSPECTION PROCEDURE 11: Lock Switch
(Liftgate) does not Work.......
INSPECTION PROCEDURE 12: Liftgate Lock
Release Handle does not Work.
..............................
INSPECTION PROCEDURE 13: KEYLESS ENTRY
SYSTEM DOES NOT WORK...........
INSPECTION PROCEDURE 14: KOS Timer Lock
Function does not Work.........
INSPECTION PROCEDURE 15: The Dome
Light, The Turn-signal Lights and The
Horn do not Operate through The
Answerback Function...........
INSPECTION PROCEDURE 16: Outer Tone alarm does not Sound...........
DATA LIST REFERENCE TABLE. . . .
ACTUATOR TEST TABLE..........
TERMINAL VOLTAGE REFERENCE CHART
.............................
SPECIAL TOOLS................
ON-VEHICLE SERVICE...........
ID CODES REGISTRATION PROCEDURE
.............................
ANTENNA COMMUNICATION TEST. . .
KEYLESS ENTRY SYSTEM CHECK. . .
INSPECTION OF KEYLESS ENTRY TIMER
LOCK FUNCTION................
CONFIGURATION FUNCTION.......
TIRE PRESSURE SENSOR ID REGISTRATION
.............................
TIRE PRESSURE SENSOR CHECK. . .
TIRE PRESSURE SENSOR ID CHECK
.............................
REMOVAL AND INSTALLATION. . . . .
EXTERIOR TRANSMITTER ANTENNA
ASSEMBLY, INTERIOR TRANSMITTER
ANTENNA ASSEMBLY, RECEIVER ANTENNA
REMOVAL AND INSTALLATION. . . . .
INSPECTION...................
DISASSEMBLY AND ASSEMBLY. . . . .
INSPECTION...................
REMOVAL AND INSTALLATION. . . . .
42B-4
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
NOTE: In this manual, F.A.S.T.-key (Free-hand
Advanced Security Transmitter) is described as
Keyless Operation System (KOS).
The Keyless Operation System (KOS) enables the driver to unlock all the doors*and the liftgate by just pulling the front door outside handle or operating the liftgate lock release handle, without taking the key out from his/her pocket or bag when he/she is carrying a
Keyless Operation Key which has been registered in the vehicle's KOS-ECU. KOS also allows the driver to lock all the doors and the liftgate by pressing the lock switch on the front door outside handle or on the liftgate lock release handle (door entry function), and start the engine without using the conventional mechanical key (engine start function). KOS has the following features:
⦆ The keyless operation key incorporates the lock and unlock switches on it. Like the conventional keyless entry system, remote control operation can be performed by using these switches. The keyless operation key also incorporates an indicator light that enables the driver to check if the signal is
GENERAL INFORMATION
M14209100001USA0000010000 transmitted correctly or if the battery in the key is discharged.
⦆ The keyless operation Key incorporates the immobilizer function that inhibits starting the engine by using an unauthorized key.
⦆ The incorporated TPMS function monitors the air pressure of all the tires.
⦆ Each vehicle is provided with two keyless operation keys. Up to four keyless operation keys can be registered in the vehicle's KOS-ECU.
⦆ The keyless operation key incorporates an emergency key with a transponder to lock/unlock the doors and start the engine in case the battery in the keyless operation key is discharged or the
Keyless Operation System is not working normally.
⦆ The driver can customize KOS; enabling/disabling all the system functions, enabling the door locking/ unlocking function only, or enabling the engine starting function only.
NOTE: When the driver’s front door outside handle is operated, only the driver’s door is unlocked.
CONSTRUCTION DIAGRAM
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
Steering lock
(Push switch, Steering lock unit)
IG knob Receiver antenna module
42B-5
Inside transmission antenna assembly
(Front)
Engine control module
KOS-ECU
TPMS transmitter
(Tire pressure sensor)
ABS or ASC-ECU
IG knob cap
Lock switch and
Unlock sensor
(Driver's side door)
Outside transmission antenna assembly
(Driver's side)
Inside transmission antenna assembly
(Rear: Driver's side)
TPMS transmitter
(Tire pressure sensor)
ETACS-ECU
Lock switch and Unlock sensor
(Passenger's side door)
TPMS transmitter
(Tire pressure sensor)
Outside transmission antenna assembly
(Passenger's side)
A
TPMS transmitter
(Tire pressure sensor)
Lock switch and Unlock sensor
(Driver's side door, Passenger's side door)
Inside transmission antenna assembly
(Rear: Passenger's side)
Section A - A
Front door outside handle
ZC600224
Antenna and Buzzer assembly
<Outside transmission antenna assembly
(Liftgate), Outer buzzer>
A
Unlock sensor Lock switch
Unlock sensor
Door assembly
Liftgate lock release handle
Lock switch
ZC601005 0000
42B-6
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
Multi information display
(Built in combination meter)
TPMS warning light
L O W
TIRE PRESSURE
SE R VIC E
RE Q UIRE D
Indicator light
Lock switch
Keyless operation key (front view)
ZC603702 0000
Emergency key
Keyless operation key (rear view)
Unlock switch
ZC6008490000
Parts name
KOS-ECU
Steering lock (incorporates push switch and steering lock unit)
Main components and functions
Functional description
Controls KOS by using the following inputs/outputs and communications.
⦆ Input from the unlock sensor and lock switch on each door, input from the push switch on the IG knob
⦆ Communications with ETACS-ECU, ECM, ABS or ASC-ECU and combination meter via CAN
⦆ Wire communication with the steering lock unit
⦆ Wireless communication with the keyless operation key via the receiver antenna module and interior/exterior transmitter antennas
⦆ Wireless communication with the TPMS transmitter
⦆ Output to the outer tone alarm
The steering lock has two unlocking mechanisms; a mechanical mechanism that uses an emergency key and an electrical mechanism. In the electrical unlocking mechanism, the steering lock communicates with KOS-ECU via wire, and when requested by KOS-ECU, the steering lock unlocks for two seconds.
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
42B-7
Parts name
Keyless operation key (incorporates emergency key)
Lock switch
Unlock sensor
Driver's door
Front passenger's door
Liftgate
Driver's door
Functional description
⦆ The keyless operation key receives signals sent from each interior/exterior transmitter antenna, certifies the keyless operation key ID code, calculates the encrypted code, and sends the reply data signal to KOS-ECU via the receiver antenna module. When the lock/unlock switch on the keyless operation key is pressed, corresponding signal is sent to KOS-
ECU via the receiver antenna module.
⦆ If two or more keyless operation keys registered in KOS-ECU respond at the same time, their signals would interfere. To avoid this interference, each signal from KOS-ECU is given the priority*1data, and the keyless operation keys respond in accordance with this priority.
Locks all the doors and the liftgate when a driver carrying the keyless operation key presses the lock switch on the front door outside handle or on the liftgate lock release handle.
Exterior transmitter antenna assembly
Front door
Liftgate lock release handle
passenger's
The unlock sensors incorporated in the driver’s front door outside handles unlock driver’s the door when a driver carrying the keyless operation key pulls the driver’s door outside handle.
The unlock sensors incorporated in the passenger's front door outside handles unlock all the doors and the liftgate when a driver carrying the keyless operation key pulls the front door outside handle.
Locks all the doors and the liftgate when a driver carrying the keyless operation key presses the lock switch on the front door outside handle or on the liftgate lock release handle.
Converts the data output from KOS-ECU via wire into a signal, and sends it to the keyless operation key.
Interior transmitter antenna assembly
Antenna & tone alarm assembly
Driver's side
Front passenger's side
Front
Rear
Exterior transmitter antenna assembly
(liftgate)
Outer tone alarm
Converts the data output from KOS-ECU via wire into a signal, and sends it to the keyless operation key.
Converts the data output from KOS-ECU via wire into a signal, and sends it to the keyless operation key.
The outer tone alarm sounds when:
⦆ The doors are locked or unlocked by the door entry function.
⦆ The keyless operation key is brought out of the vehicle when the IG knob is in the "LOCK" (OFF) position and the push switch is in other than the ON position.
⦆ The lock switch on the keyless operation switch is pressed when the IG knob is in the "LOCK" (OFF) position and the push switch is in other than the ON position.
⦆ The lock switch on the keyless operation key is pressed from inside the car.
⦆ The lock switch on the keyless operation key is pressed when the door is ajar.
42B-8
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
Parts name
Receiver antenna module
TPMS transmitter
Combination meter (Multi information display, TPMS warning light)
ETACS-ECU
ECM
ABS or ASC-ECU
NOTE:
Functional description
Receives the operation signals from the lock/unlock switches and panic alarm switch on the keyless operation key, and the air pressure signal from the TPMS transmitter, and then converts them into data and sends them to KOS-ECU.
Measure tire pressure directly, then send radio frequency signal to receiver antenna module.
Communicates with KOS-ECU via CAN. Receives the warning request or warning information from KOS-ECU, flashes or activates*2the warning indicator or warnig light. Warning symbol and message is additionally displayed on the multi information display
Communicates with KOS-ECU via CAN. Send ignition switch status. Receives the door lock/unlock request from KOS-ECU, outputs the lock/unlock signal, and flashes the turn signal light to inform the driver that the doors are locked/unlocked.
Communicates with KOS-ECU via CAN. Permits/inhibits the engine starting and controls the engine operation. Send atmospheric pressure data.
Communicates with KOS-ECU via CAN. Sends the vehicle speed data.
*1: When registering the keyless operation keys, KOS-ECU numbers each key (1 to 4) in the order they are registered (initial priority). This priority is renewed each time the doors are locked/unlocked and the IG knob is pressed. For example, when only keys 1 and 3 have responded to the signal sent from KOS-ECU, the new priority of the keys would be 1-3-2-4. When keys 3 and 4 have responded, then the priority of the keys becomes
3-4-1-2.
NOTE: *2: Illuminates for tire pressure warning.
Flashes for about 1 minute and then coutinuously illuminated for TPMS malfunction warning.
KEYLESS OPERATION SYSTEM (KOS)
GENERAL INFORMATION
42B-9
System configuration
Steering unit
Push switch
Steering lock unit
Dome light,
Ignition key cylinder illumination light
Horn
CAN-B communi- cation
ETACS-ECU
Door lock actuator
Liftgate lock actuator
CAN-C comm- unication
ECM
ABS or ASC-ECU
Turn-signal light
Combination meter
(Multi center display, TPMS warning light )
Unlock sensor and lock switch
(driver's side door)
Unlock sensor and lock switch
(passenger's side door)
KOS-ECU
Liftgate lock release handle and lock switch
(liftgate)
Outer buzzer
Receiver antenna module
Radio frequency signal
Antenna
Transmission circuit
CPU Battery
Pressure sensor
Acc. sensor
TPMS transmitter
Interior transmitter antenna assembly
Front
Rear:
Driver's side
Rear:
Passenger's side
Exterior transmitter antenna assembly
Driver's side
Passenger's side
Liftgate
Front tire (LH)
Rear tire (LH)
Radio frequency signal
Front tire (RH)
Radio frequency signal
Lock switch
Keyless operation key
Unlock switch
Emergency key (incorporating a transponder)
Indicator light
Radio frequency signal
Rear tire (RH)
ZC600946 0001
42B-10
KEYLESS OPERATION SYSTEM (KOS)
SERVICE SPECIFICATIONS
SERVICE SPECIFICATIONS
Item
Voltage of keyless operation key battery V
Standard value
2.5 - 3.2
M14209100042USA0000010000
DIAGNOSIS
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 - Contents of troubleshooting P.
00-6.
DIAGNOSTIC FUNCTION
Data link connector
MB991910
MB991824
MB991827
M14209100044USA0000010000
M14209100054USA0000010000
ZC501967
AC404789
ZC5019680000
HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1.
Ensure that the ignition switch is at the "LOCK" (OFF) position.
2.
Start up the personal computer.
3.
Connect special tool MB991827 to special tool MB991824 and the personal computer.
4.
Connect special tool MB991910 to special tool MB991824.
5.
Connect special tool MB991910 to the data link connector.
6.
Turn the power switch of special tool MB991824 to the "ON" position.
NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7.
Start the M.U.T.-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-11
HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool
MB991958 does not display.
1.
Connect scan tool MB991958 to the data link connector.
2.
Turn the ignition switch to the "ON" position.
3.
Select "System select" from the start-up screen.
4.
Select "From 2006 MY" of "Model Year." When the "Vehicle
Information" is displayed, check the contents.
5.
Select "ETACS" from "System List", and press the "OK" button.
NOTE: When the "Loading Option Setup" list is displayed, check the applicable item.
6.
Select "Diagnostic Trouble Code."
7.
If a DTC is set, it is shown.
8.
Choose "Erase DTCs" to erase the DTC.
CHECK OF FREEZE FRAME DATA
The freeze frame data can be checked by using the scan tool (GROUP 00, How to Cope with Intermittent
Malfunction P.00-15).
determination of the DTC and the data when the DTC is determined, and then stores the ECU status of that time. By analyzing each data from scan tool, the troubleshooting can be performed more efficiently.
The displayed items are as the table below.
When detecting fault and storing the DTC, the ECU connected to CAN bus line obtains the data before the
Item No.
01
02
04
Display item list
Item name Data item
Odometer Total driving distance after the diagnosis code is generated
Ignition cycle Number of times the ignition switch is turned "ON" or
"LOCK (OFF)" after the past failure transition
Unit km*
Number of counts is displayed.
min Current trouble accumulative time
Cumulative time for current malfunction of diagnosis code
NOTE: *: If a failure occurs to both the ABS-ECU and
ETACS-ECU, 0000 km or FFFF km is displayed to the scan tool
MB991958.
42B-12
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ID CODES REGISTRATION JUDGMENT TABLE
Do not replace the engine control module and
KOS-ECU at the same time. When replacing several ECUs, always replace one ECU at a time, register the necessary IDs in it, and then replace the next ECU.
The individual unique ID code is stored in the transponder (small transmitter) and KOS-ECU integrated in the emergency key, engine control
Item Operation procedure
M14209100048USA0000010000 module (ECM), keyless operation key, and steering lock unit for KOS. Under the conditions shown in the table, the corresponding ID code has to be registered with KOS-ECU or the ECM again.
NOTE: The KOS-ECU memory can memorise the maximum
4 different keyless operation keys (keyless operation key ID codes) and maximum 8 different emergency keys (key IDs).
contents and Reference page for registration contents
When the engine control module is replaced
Registration of Key codes
When KOS-ECU is replaced 1.
2.
3.
4.
5.
Register the steering lock unit again.
VIN programmed
Register all the emergency keys again.
Register all the keyless operation keys again.
Register the TPMS transmittters
Key code registration (Refer to
GROUP 00 - Precautions before
Service - How to Perform VIN
Writing P.00-26.)
⦆ Steering Lock Unit Registration and Key and KOS Key
Registration (Refer to
⦆ Write the VIN (Refer to GROUP
00 - Precautions before Service -
How to Perform VIN Writing P.
00-26).
⦆ Registering tire pressure sensor
When the receiver antenna module is replaced
When a keyless operation key is added or replaced
Operation is not needed -
When a keyless operation key is lost
When an emergency key is added as a unit
When an emergency key is lost as a unit
1.
2.
Register all the emergency keys again.
Register all the keyless operation keys again.
1.
2.
Register all emergency keys other than the lost one again.
Register all keyless operation keys other than the lost one again.
1.
2.
Register all the emergency keys again.
Register all the keyless operation keys again.
1.
2.
Register all emergency keys other than the lost one again.
Register all the keyless operation keys again.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-13
Item
When the emargency key is replaced by the full service key set or the handle lock service key set is replaced by the piece.
Operation procedure
contents and
1.
2.
Register all emargency keys again input barcode No.
Register all the keyless operation keys again.
Operation is not needed
When the blank key*is replaced by the door service key set or glove box service key set is added by the piece.
When TPMS transmittter is replaced
Register the TPMS trnsmittter
-
Reference page for registration contents
Key (Barcode No.) and KOS Key
Registration (Refer to P.42B-163)
Registering tire pressure sensor ID.
Emaregency key
Key supply unit
Keyless operation key
NOTE: Blank key (It is the key that comes with the door service key set and the glove box service key set. It can only be used for locking and unlocking, and it cannot start the engine.)
Blank key
ZC6044010001
Service assembly
ZC603741
key
ZC6037420000
KEY SUPPLY UNIT LIST FOR OTHER THAN INDIVIDUAL KEY
Full service key set Handle lock service key set
Door service key set
Glove box service key set
ZC6045410000
ZC6045520000 ZC6045500000
ZC6045390000
ZC6045510000
42B-14
Registration flow chart
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES
1. Registration of Key Code
Start of registration
Caution:
Do not replace the ECM and the KOS-ECU simultaneously.
Always replace the ECU by ones when the multiple ECU is replaced, and then replace the next ECU after registering the necessary IDs.
ECM is replaced.
NO
KOS-ECU is replaced.
NO
YES
Steering lock unit is replaced.
YES
NO
2. KOS ID is registered to stee ring lo ck uni t
2. Automatic registration of KOS ID
3. Registration of VIN
Keyless operation key is replaced or added.
NO
YES
Emergency key is replaced or added.
NO
YES
Key is replaced by the full service key set or by the handle lock service key set separately.
YES
NO
4. Registration of key ID
(every one code)
4. Registration of key ID (Barcode No.)
TPMS transmitter is replaced.
5. Registration of keyless operation key ID
YES
NO
NOTE
*: When KOS-ECU or TPMS transmitter is replaced.
End of registration
6. Registration of tire pressure sensor ID*
ZC603739 0000
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-15
WARNING AND WARNING INDICATOR LIST
When KOS or TPMS failed or operated improperly,
KOS-ECU warns the driver of this by setting off the outer tone alarm, the keyless operation warning
Display contents Item State
KEY BATTE RY
LOW
ZC603745 0000
KEY MISSING
ZC603746 0000
STEERING
WHEEL LOCK
ZC603744 0000
CONFIRM
KEY LOCATION
ZC603747 0000
Low operation
keyless
key battery voltage warning
IG knob is not returned properly.
Keyless operation key carrying-out warning
The
Opening of the driver's door is detected when the
IG knob is in ACC or
LOCK position and the push switch is
ON.
The keyless operation key is carried out of the vehicle when the IG knob is in other than the LOCK position.
M14209100149USA0000010000 indicator or on the multi information display in the combination meter, or the TPMS warning indicator.
keyless operation key with low battery voltage is detected when the IG knob is pressed.
No operation
keyless
key detected inside the car
No keyless operation key is detected inside the car when the IG knob is pressed.
Warning operations
⦆ Warning indicator flashes for 30 seconds.
⦆ The outer tone alarm will not sound.
⦆ The warning indicator flashes for 5 minutes.
⦆ The outer tone alarm will not sound.
⦆ The warning indicator flashes for 5 minutes.
⦆ The outer tone alarm will not sound.
⦆ Key reminder warning tone alarm sounds until closing of the driver's door detected.
is
⦆ The warning indicator flashes for 5 minutes.
⦆ Outer tone alarm sounds for seconds pattern 2.
5.69
in
Warning conditions
cancellation
(Cancels warning operations when one of the conditions met)
⦆ IG knob in "LOCK" (OFF) position and push switch
OFF are detected.
⦆ 30 seconds have passed after the warning output started.
⦆
⦆
⦆
⦆
⦆
⦆
⦆
⦆
IG knob in "LOCK" (OFF) position and push switch
OFF are detected.
5 minutes have passed after the warning output started.
The IG knob in the "RUN" or "START" position, or the IG knob in the
"LOCK" (OFF) position, and the push switch OFF are detected.
The driver's door is detected closed from the open position.
5 minutes have passed after the warning output started.
IG knob in LOCK position and push switch OFF are detected.
KOS-ECU has detected a keyless operation key inside the vehicle.
5 minutes have passed after the warning output started.
42B-16
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Display contents Item
CHECK DOORS
ZC603748 0000
REM OVE KE Y
ZC6022600000
System error
State
Door lock does not operate.
Push switch is pressed ON when the IG knob is in other than LOCK position.
Push switch is pressed ON when the keyless operation key is inside the car.
Push switch is pressed ON when the door is ajar.
Push switch is pressed ON from
OFF when an error has been detected in EEPROM in
KOS-ECU.
Push switch is pressed ON from
OFF while open circuit in the transmitter antennas are being detected.
The push switch is pressed ON from
OFF while short circuit in the power supply
(steering
output
lock, transmitter antennas, receiver antenna module, etc.) is detected.
Steering lock communication error has been detected when the push switch was pressed ON.
Warning operations
⦆ Warning indicator flashes for 5
⦆ seconds.
Outer seconds pattern 1.
tone alarm sounds for 2.96
in
⦆ The warning indicator flashes for 5 minutes.
⦆ The outer tone alarm will not sound.
Warning conditions
cancellation
(Cancels warning operations when one of the conditions met)
⦆ IG knob in "LOCK" (OFF) position and push switch
OFF are detected.
⦆ 5 seconds have passed after the warning output started.
⦆ Lock switch on the keyless operation switch is pressed again.
⦆ 5 seconds have passed after the warning output started.
⦆ All doors are closed.
⦆ 5 seconds have passed after the warning output started.
5 minutes have passed after the push switch was pressed ON and IG knob is in "LOCK" (OFF) position.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-17
Display contents Item a b
LOW
TIRE PRESSURE
ZC6037100000
SE RVIC E
RE QUIRE D
ZC6037110000
State Warning operations
Warning conditions
cancellation
(Cancels warning operations when one of the conditions met)
Tire alarm
pressure
TPMS alarm
The IG knob is in other than the
LOCK position while some error is being detected.
The received tire pressure value is under the threshold value.
Abnormality of data is detected.
When the tire judgment*is performed 5 times or more continuously, for every time during the period, one or more IDs of tires with pressure under the specified value are received.
The low battery function code is continuously received.
⦆ The indicator illuminates until it receives the normal tire pressure value.
⦆ The outer tone alarm will not sound.
⦆ The indicator illuminates until the abnormality of the data is recovered.
⦆ The outer tone alarm will not sound.
⦆ The indicator illuminates until all the IDs of tires with over the specified value normally
are received.
⦆ The outer tone alarm will not sound.
The received tire pressure value is over the threshold value.
Normality is confirmed.
All the IDs of tires with pressure over the specified value are normally received.
⦆ The indicator illuminates until the pressure
normal function code is continuously received.
⦆ The outer tone alarm will not sound.
The normal pressure function code is continuously received.
42B-18
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Display contents Item
NOTE:
TPMS alarm
State
With the ignition switch "ON," while the wake function code is received for the specified times, when the vehicle speed signal is always under 5 km/ h (3.1 mph/h)
Abnormality of data is detected.
When the vehicle speed exceeds 30 km/h
(18.6 mph/h) for more than 35 seconds, the signals received from the TPMS transmitter shall be checked for 15 minutes. During that 15 minutes of reception check, when the specified value of a tire is normally received, the tire is judged as the road wheel. After the 15 minuses of
Warning operations
⦆ With the ignition switch
"ON," the indicator illuminates until the vehicle speed of 5 km/h
(3.1 mph/h) or more is kept for
1 second or longer.
⦆ The outer tone alarm will not sound.
⦆ The indicator illuminates until the abnormality of the data is recovered.
⦆ The outer tone alarm will not sound.
Warning conditions
cancellation
(Cancels warning operations when one of the conditions met)
With the ignition switch
"ON," the vehicle speed of 5 km/h (3.1 mph/h) or more is kept for 1 second or longer.
Normality is confirmed.
measurement, if four tires are judged as the road wheels, the remaining wheel is judged as the spare tire. After the 15 minuses of measurement, if three or less tires are judged as the road wheels, the result of last measurement will be applied for the unjudged tire(s).
DIAGNOSTIC TROUBLE CODE CHART
During diagnosis, a DTC associated with other system may be set when the ignition switch is
Diagnostic trouble code number
Diagnostic item
B1731
M14209100002USA0000010001 turned on with connector(s) disconnected. On completion, check all systems for diagnostic trouble code(s). If DTC(s) are set, erase them all.
Engine control module communication timeout
Reference page
B1761
B1A08
B1A09
B1A0A
VIN not programmed
Keyless/KOS key1 performance
Keyless/KOS key2 performance
Keyless/KOS key3 performance
B1A0B
B1A10
Keyless/KOS key4 performance
Keyless/KOS key 1 low battery
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
B2408
B2409
B240A
B240B
B240C
B240D
B240E
B240F
B2401
B2402
B2403
B2404
B2405
B2406
B2407
B2412
B2413
B2414
B2415
B2416
C1608
C1900
C1901
C1910
C1920
Diagnostic trouble code number
B1A11
B1A12
B1A13
B1A24
B1A25
B1A28
B1A35
B2101
B2102
B2204
B2206
B2352
B2400
Diagnostic item
Keyless/KOS key 2 low battery
Keyless/KOS key 3 low battery
Keyless/KOS key 4 low battery
Key ID not registered
Key ID unmatched
Engine control module authenticate error
Transponder read error
IG SW start POS.circuit low
IG SW start POS.circuit high
Coding data mismatch
VIN mismatch
Antenna fail
KOS key registration fail
Keyless/KOS key ID not registered
STL unit comm.(system ID)
STL unit comm.(CRC)
STL unit comm.(function code)
STL unit comm.(rolling code)
STL unit comm.(PTC operate)
STL unit comm.(EEPROM)
STL unit comm.(solenoid)
STL unit comm.(No response)
FR antenna(outdoor) open
FL antenna(outdoor) open
Liftgate antenna(outdoor) open
Front antenna(indoor) open
RR antenna(indoor) open
RL antenna(indoor) open
LF antenna power voltage
STL unit power voltage
Unlock sensor fail
RA module power voltage
ECU internal error
EEPROM error
No registration
Vehicle speed information abnormality
Transmitter low battery voltage abnormality 1
Transmitter low battery voltage abnormality 2
42B-19
Reference page
42B-20
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
U0151
U0154
U0155
U0164
U0184
U0197
U0245
U1412
U1415
U1417
C1943
C1914
C1924
C1934
C1944
U0019
U0141
Diagnostic trouble code number
C1930
C1940
C1911
C1921
C1931
C1941
C1912
C1922
C1932
C1942
C1913
C1923
C1933
Diagnostic item Reference page
NOTE:
Transmitter low battery voltage abnormality 3
Transmitter low battery voltage abnormality 4
Reception abnormality 1
Reception abnormality 2
Reception abnormality 3
Reception abnormality 4
Tire inflation pressure warning 1
Tire inflation pressure warning 2
Tire inflation pressure warning 3
Tire inflation pressure warning 4
Acceleration sensor abnormality 1
Acceleration sensor abnormality 2
Acceleration sensor abnormality 3
Acceleration sensor abnormality 4
Pressure sensor abnormality 1
Pressure sensor abnormality 2
Pressure sensor abnormality 3
Pressure sensor abnormality 4
Bus off (CAN-B)
ETACS-ECU CAN timeout
SRS-ECU CAN timeout
Occupant classification-ECU CAN timeout
Combination meter CAN timeout
A/C-ECU CAN timeout
Audio CAN timeout
Hands free module CAN timeout
Audio visual navigation unit CAN timeout
Implausible Vehicle Speed Signal Received
Coding not completed/Data fail
Implausible coding data
⦆ *2: RA module = receiver antenna module
⦆ *1: STL unit = steering lock unit
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-21
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC B1731: Engine Control Module communication timeout
⦆ When the DTC B1731 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
M14209100004USA0000010000 from the Engine Control Module via the CAN bus lines when the ignition switch is turned to ON position, it is judged as abnormal.
DTC SET CONDITION
KOS-ECU checks that the Engine Control Module data has been received via the CAN bus lines, and if not, sets the DTC No. B1731.
TROUBLESHOOTING HINTS
⦆ Malfunction of CAN bus line
⦆ Malfunction of KOS-ECU
⦆ Malfunction of engine control module
⦆ Malfunction of ETACS-ECU
TECHNICAL DESCRIPTION (COMMENT)
If no data [ETACS transmits engine random number data to KOS-ECU via the CAN bus lines] is received
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
42B-22
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the Engine Control
Module diagnostic trouble code
Check again if the DTC is set to the engine control module.
Q:Is the DTC set?
YES: Troubleshoot the MFI system (Refer to GROUP 13Ab,
Diagnostic trouble code chart P.13Ab-44).
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
to P.42B-12.) After registering the ID codes, go to Step
4.
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-23
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace the engine control module and record the
VIN. (Refer to GROUP 00 - How To Perform Vehicle
Identification Number (VIN) Writing P.00-26.)
NO: The procedure is complete.
DTC B1761: VIN not programmed
⦆ When the DTC No. B1761 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
KOS-ECU sets DTC B1761 when no VIN is recorded in it.
M14209100005USA0000010000
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present when no VIN is recorded in it.
TROUBLESHOOTING HINTS
⦆ VIN not programmed
⦆ Malfunction of the KOS-ECU
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
42B-24
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 2. Register the VIN and recheck the diagnostic trouble code.
Register VIN in KOS-ECU (Refer to GROUP 00 - How to Perform
Vehicle Identification Number (VIN) Writing P.00-26) and recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
DTC B1A08 Keyless/KOS key1 performance
DTC B1A09 Keyless/KOS key2 performance
DTC B1A0A Keyless/KOS key3 performance
DTC B1A0B Keyless/KOS key4 performance
When replacing the ECU, always check that the communication circuit is normal.
M14209100123USA0000010000
⦆ B1A0B: If the difference between the rolling code for the keyless operation key 4 (the fourth keyless operation key registered with KOS-ECU) and that memorised by KOS-ECU is large, it is judged as abnormal.
DTC SET CONDITION
The mechanism which automatically changes a code for lock/unlock each time a lock operation is performed is referred to as a rolling code. If KOS-ECU receives wrong signal (out of synchronisation of a rolling code) from the keyless operation key, KOS-
ECU memorises the DTC B1A08.
TROUBLESHOOTING HINTS
⦆ Rolling code out of synchronisation
⦆ Malfunction of the keyless operation key
⦆ Malfunction of the KOS-ECU
DIAGNOSIS
TECHNICAL DESCRIPTION (COMMENT)
⦆ B1A08: If the difference between the rolling code for the keyless operation key 1 (the first keyless operation key registered with KOS-ECU) and that memorised by KOS-ECU is large, it is judged as abnormal.
⦆ B1A09: If the difference between the rolling code for the keyless operation key 2 (the second keyless operation key registered with KOS-ECU) and that memorised by KOS-ECU is large, it is judged as abnormal.
⦆ B1A0A: If the difference between the rolling code for the keyless operation key 3 (the third keyless operation key registered with KOS-ECU) and that memorised by KOS-ECU is large, it is judged as abnormal.
STEP 1. Synchronise the rolling code and recheck the diagnostic trouble code.
Synchronise the rolling codes, and check whether the
DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Press the lock or unlock switch of the keyless operation key for which the DTC is set at least once to synchronise the rolling codes.
(4) Check if the DTC is set.
Q:Is the DTC set?
YES: Go to Step 2.
NO: The procedure is complete.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 2. Check whether the diagnostic trouble code is reset.
Replace the keyless operation key for which the DTC is set with a new one, register the encrypted code and
keyless operation key ID (refer to P.42B-12), and
check whether the DTC is reset.
(1) Erase the DTC.
42B-25
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes.
NO: The procedure is complete.
DTC B1A10 Keyless/KOS key 1 low battery
DTC B1A11 Keyless/KOS key 2 low battery
DTC B1A12 Keyless/KOS key 3 low battery
DTC B1A13 Keyless/KOS key 4 low battery
When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If KOS-ECU receives the keyless operation key low battery voltage signal, KOS-ECU sets the DTC
B1A10, B1A11, B1A12, or B1A13.
TECHNICAL DESCRIPTION (COMMENT)
⦆ B1A10: If KOS-ECU receives the keyless operation key 1 (the first keyless operation key registered with
KOS-ECU) low battery voltage signal in five consecutive times, it is judged as abnormal.
⦆ B1A11: If KOS-ECU receives the keyless operation key 2 (the second keyless operation key registered with KOS-ECU) low battery voltage signal in five consecutive times, it is judged as abnormal.
⦆ B1A12: If KOS-ECU receives the keyless operation key 3 (the third keyless operation key registered with KOS-ECU) low battery voltage signal in five consecutive times, it is judged as abnormal.
⦆ B1A13: If KOS-ECU receives the keyless operation key 4 (the fourth keyless operation key registered with KOS-ECU) low battery voltage signal in five consecutive times, it is judged as abnormal.
TROUBLESHOOTING HINTS
⦆ Malfunction of the keyless operation key battery
⦆ Malfunction of the keyless operation key
⦆ Malfunction of KOS-ECU
M14209100124USA0000010000
DIAGNOSIS
STEP 1. Replace the battery in the keyless operation key and recheck the diagnostic trouble code.
Replace the battery of the keyless operation key for which the DTC is set, and check whether the DTC is reset.
(1) Replace the battery of the keyless operation key for which the DTC is set.
(2) Erase the DTC.
(3) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(4) Lock or unlock the keyless operation key.
(5) Check if the DTC is set.
Q:Is the DTC set?
YES: Go to Step 2.
NO: The procedure is complete. (Discharged battery)
STEP 2. Replace the keyless operation key and recheck the diagnostic trouble code.
Replace the keyless operation key for which the DTC is set with a new one, register the encrypted code and
keyless operation key ID (refer to P.42B-12), and
check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes.
42B-26
NO: The procedure is complete.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC B1A24: Key ID not registered
DTC SET CONDITION
KOS-ECU sets the DTC B1A24 when the key ID was not registered in it.
ROUBLESHOOTING HINTS
⦆ Key ID not registered
⦆ Malfunction of KOS-ECU
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present, if the key ID is not registered in it when the ignition switch is turned ON.
Data link connector
MB991910
MB991824
ZC501967
AC404789
M14209100089USA0000010000
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Register the key ID and recheck the diagnostic trouble code.
Register the key ID of the emergency key by which the DTC is
set (refer to P.42B-163), and recheck if the DTC is set.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-27
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the DTC is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
DTC B1A25: Key ID unmatched
DTC SET CONDITION
KOS-ECU sets the DTC B1A25 when the received key ID is different from the one registered in it.
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present, if the transponder ID does not match the one registered in it when the ignition switch is turned ON.
M14209100090USA0000010000
TROUBLESHOOTING HINTS
⦆ Malfunction of the emergency key
⦆ Accessory key not registered
⦆ Accessory KOS-ECU not registered
⦆ Key is registered to another vehicle
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
42B-28
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Register the key ID and recheck the diagnostic trouble code.
Register the key ID of the emergency key by which the DTC is
set (refer to P.42B-163), and recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the DTC is set.
Q:Is the DTC set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Replace the emergency key and recheck the diagnostric trouble code.
Replace the emergency key for which the DTC is set with a new one, register the key ID and keyless operation key ID (refer
to P.42B-12), and check whether the DTC is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-29
DTC B1A28: Engine control module authenticate error
M14209100091USA0000010000 module status do not match after the engine start permission communication is completed.
⦆ When the DTC B1A28 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If the key certification result by KOS-ECU does not match with the engine control module status, KOS-
ECU sets the DTC B1A28.
TROUBLESHOOTING HINTS
⦆ Malfunction of KOS-ECU
⦆ Engine control module malfunction
⦆ VIN registered in engine control module unmatched
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present, if the key certification result and the engine control
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
42B-30
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 2. Check the VIN registered in the engine control module and the vehicle's VIN.
Check if VIN registered in the engine contyrol module matches with the vehicle's VIN.
Q:Do VIN registered in the engine control module and the vehicle's VIN match?
YES: Go to Step 3.
NO: Replace the engine control module and record the VIN.
(Refer to GROUP 00 - How To Perform Vehicle Identification
Number (VIN) Writing P.00-26.) After registering the VIN, go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC B1A35: Transponder read error
⦆ When the DTC B1A35 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If no transponder data can be received, KOS-ECU sets the DTC B1A35.
M14209100092USA0000010000
TROUBLESHOOTING HINTS
⦆ Malfunction of the emergency key
⦆ Interference of the key ID
⦆ Malfunction of KOS-ECU
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present, if it cannot receive the key ID for the emergency key when the ignition switch is turned ON.
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-31
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the ignition key inserted in the key cylinder for interference.
Check if there are other ignition keys or anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the ignition key inserted in the key cylinder.
Q:Are there other ignition keys or anything that interferes with the communication?
YES: Move away or remove other ignition keys or anything that interferes with the communication, and go to Step 4.
NO: Go to Step 2.
STEP 2. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 3.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Go to Step 5.
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
42B-32
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Go to Step 5.
NO: The procedure is complete.
STEP 5. Replace the emergency key and recheck the diagnostic trouble code.
Replace the emergency key for which the DTC is set with a new one, register the key ID and keyless operation key ID (refer
to P.42B-12), and check whether the DTC is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(2) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
DTC B2101: IG SW start POS.circuit low
DTC B2102: IG SW start POS.circuit high
⦆ If the DTC B2101 or B2102 is set in KOS-ECU, always diagnose the CAN bus lines.
M14209100096USA0000010000
⦆ Before replacing the ECU, ensure that the communication circuit is normal.
ETACS-
ECU
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
KOS-ECU Communication Circuit
FUSIBLE
LINK 34
IGNITION
SWITCH (IG1)
IG1
RELAY
42B-33
Connector: C-317
POWER
SUPPLY
KOS-ECU
ZC6008780006
42B-34
Connector: C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC600875 0028
DTC SET CONDITION
If the actual ignition switch status is different from the ignition switch status information received from
ETACS-ECU via CAN, KOS-ECU sets the diagnostic trouble code No. B2101 or B2102.
B2101
⦆ Status of ignition switch: ON position
⦆ Ignition switch position information: OFF
B2102
⦆ Status of ignition switch: OFF position
⦆ Ignition switch position information: ON
TECHNICAL DESCRIPTION (COMMENT)
If the difference in the ignition switch level shown below occurs consecutively 10 times with the ignition switch being the ON position or START position, when the CAN message (ignition switch position information) from ETACS-ECU, KOS-ECU determines that there is a problem.
TROUBLESHOOTING HINTS
⦆ Malfunction of CAN bus line
⦆ Malfunction of the KOS-ECU
⦆ Malfunction of the ignition switch
⦆ Damaged wiring harness and connectors
⦆ Malfunction of ETACS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-35
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Check ETACS-ECU connector C-317 and KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is ETACS-ECU connector C-317 and KOS-ECU connector
C-102 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal No.39) and ETACS-ECU connector C-317 (terminal No.5).
⦆ Check the power supply line for open circuit.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal No. 39) and ETACS-ECU connector C-317
(terminal No. 5) in good condition?
YES: Go to Step 4.
NO: Repair the wiring harness.
STEP 4. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to the ignition voltage.
Item No.
Item name Normal conditions
Item 254 IG voltage Battery voltage
Q:Does scan tool MB991958 display the item "IG voltage" as normal condition?
YES: Go to Step 5.
42B-36
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
NO: Diagnose the ETACS-ECU. Refer to GROUP 54Ad,
Diagnosis P.54Ad-8.
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC B2204: Coding data mismatch
⦆ When the DTC B2204 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If the vehicle information data on the CAN bus lines is different from that registered with KOS-ECU, KOS-
ECU sets the DTC B2204.
M14209100098USA0000010000
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present when the vehicle information registered in it does not match the vehicle information on the CAN bus lines.
TROUBLESHOOTING HINTS
⦆ Malfunction of KOS-ECU
⦆ Malfunction of ETACS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-37
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code
Check again if the DTC is set to the ETACS-ECU.
Q:Is the DTC set?
YES: Troubleshoot the ETACS. (Refer to GROUP 54Ad,
Diagnosis P.54Ad-8.)
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
42B-38
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC B2206: VIN mismatch
DTC SET CONDITION
KOS-ECU sets DTC B2206 when chassis number registered in it and VIN that has been transmitted on the CAN bus do not match.
M14209100093USA0000010000
TROUBLESHOOTING HINTS
⦆ Malfunction of KOS-ECU
⦆ VIN registered in engine control module unmatched
⦆ KOS-ECU being registered to another vehicle
⦆ Malfunction of ETACS-ECU
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present when VIN registered in it and the one that has been transmitted on the CAN bus do not match.
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17). Then go to Step2.
MB991827
ZC5019680000
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-39
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
to P.42B-12.) After registering the ID codes, go to Step
3.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace the engine control module and record the
VIN. (Refer to GROUP 00 - How To Perform Vehicle
Identification Number (VIN) Writing P.00-26.)
NO: The procedure is complete.
DTC B2352: Antenna fail
When replacing the ECU, always check that the communication circuit is normal.
Receiver Antenna Module and KOS-ECU Circuit
KOS-ECU
M14209100094USA0000010000
RECEIVER ANTENNA
MODULE
IGNITION
KEY RING
ANTENNA
KEYLESS
OPERATION
KEY
ENCRYPTED CODE
TRANSPONDER
42B-40
Connector: C-30, C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
C-102
C-30
ZC6008750035
DTC SET CONDITION
If an open circuit or short to ground occurs in the antenna, KOS-ECU sets the DTC B2352.
ECU. If an open circuit or short to ground occurs on the wiring harness between KOS-ECU and receiver antenna at this time, KOS-ECU determines that there is a problem.
TECHNICAL DESCRIPTION (COMMENT)
When the ignition switch is turned ON, KOS-ECU sends signals to the receiver antenna module. The receiver antenna transmits random numbers to the emergency key when it receives signals from KOS-
TROUBLESHOOTING HINTS
⦆ Malfunction of the receiver antenna module
⦆ Damaged wiring harness and connectors
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
Check the DTC B2415 is set to the KOS-ECU.
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-41
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan too (M.U.T.-III) P.54Af-4."
(2) Turn the ignition switch to the "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC B2415 is set?
YES:
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check receiver antenna module connector C-30 and KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the receiver antenna module connector C-30 and KOS-
ECU connector C-102 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
STEP 3. Check the wiring harness between the receiver antenna module connector C-30 (terminal No. 1, 2) and the
KOS-ECU connector C-102 (terminal No. 11, 12).
⦆ Check the signal lines for open circuit and short circuit.
Q:Is the wiring harness between receiver antenna module connector C-30 (terminal No. 1, 2) and the KOS-ECU connector C-102 (terminal No. 11, 12) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Replace the receiver antenna module, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
42B-42
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
NO: The procedure is complete.
DTC B2400: KOS key registration fail
⦆ If the DTC B2400 is set, diagnose the CAN bus lines.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If the registration of the keyless operation key ID to
KOS-ECU fails, KOS-ECU sets the DTC B2400.
M14209100014USA0000010000 registration of the keyless operation key ID fails when a new keyless operation key is added or the existing key is replaced, KOS-ECU determines that there is a problem.
TROUBLESHOOTING HINTS
⦆ Keyless operation key ID registration failure
⦆ Malfunction of the keyless operation key
⦆ Malfunction of KOS-ECU
⦆ Malfunction of CAN bus line
TECHNICAL DESCRIPTION (COMMENT)
Assuming that another keyless operation key has already been registered with KOS-ECU, if the
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-43
STEP 2. Replace the battery in the keyless operation key and recheck the diagnostic trouble code.
Replace the battery of the keyless operation key for which the
DTC is set, and check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Go to Step 3.
NO: The procedure is complete. (Discharged battery)
STEP 3. Replace the keyless operation key and recheck the diagnostic trouble code.
Replace the keyless operation key for which the DTC is set with a new one, register the encrypted code and keyless operation
key ID (refer to P.42B-12), and check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
DTC B2401: Keyless/KOS key ID not registered
M14209100015USA0000010000 when the number of the registered keyless operation keys is 0, it is judged as abnormal.
⦆ If the DTC B2401 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
If no keyless operation key ID is registered with KOS-
ECU or if the keyless operation key with ID not registered is used, KOS-ECU sets the DTC B2401.
PROBABLE CAUSES
⦆ The registration of a keyless operation key ID fails when no keyless operation key ID is registered.
⦆ Malfunction of the keyless operation key
⦆ Malfunction of KOS-ECU
JUDGEMENT CRITERIA
If the number of the registered keyless operation keys is 0, or the registration of a keyless operation key fails
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
42B-44
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Register the keyless operation key ID and recheck the diagnostic trouble code.
Register the keyless operation key ID (refer to P.42B-163), and
check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Replace the keyless operation key and recheck the diagnostic trouble code.
Replace the keyless operation key for which the DTC is set with a new one, register the encrypted code and keyless operation
key ID (refer to P.42B-12), and check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-45
DTC B2402: STL unit comm.(system ID), B2403: STL unit comm.(CRC), B2404: STL unit comm.(function code), B2405: STL unit comm.(rolling code), B2406: STL unit comm.
(PTC operate), B2407: STL unit comm.(EEPROM), B2408: STL unit comm.(solenoid)
⦆ If the DTC B2402, B2403, B2404, B2405, B2406,
B2407, or B2408 is set, diagnose the CAN bus lines.
M14209100125USA0000010000
⦆ Whenever the steering lock unit is replaced, ensure that the communication circuit is normal.
Key Reminder Switch and KOS-ECU Circuit
KEY
REMINDER
SWITCH
(PUSH SWITCH)
KOS-ECU
DTC SET CONDITION
When the ignition push switch is pressed, the steering lock unit communicates with KOS-ECU to unlock the
IG knob. However, if there is a failure shown below, the corresponding DTC is set.
⦆ B2402: System ID (vehicle specific code) failure
⦆ B2403: Cyclic Redundancy Check (CRC): The error detection strategy to detect a continuously occurring error (burst error), the calculation result discrepancy
⦆ B2404: Function code failure
⦆ B2405: Rolling code (automatically changing a code for lock/unlock each time when a lock operation is performed)
⦆ B2406: PTC thermistor continuously activated or activated to prevent solenoid abnormal heating on the communication with steering lock unit
⦆ B2407: EEPROM failure
⦆ B2408: Communication error between the steering lock unit and KOS-ECU, or solenoid failure
TECHNICAL DESCRIPTION (COMMENT)
Range of check
⦆ When the IG knob unlock communication is performed by pressing the ignition push switch
Judgement criteria
⦆ B2402: Steering lock unit communication error
(system ID) or received system ID error
⦆ B2403: Steering lock unit communication error
(CRC) or received frame CRC calculation result discrepancy
42B-46
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ B2404: Steering lock unit communication error
(function code) or received frame function code undefined
⦆ B2405: Steering lock unit communication error
(rolling code) or received rolling code out of the permissible range
⦆ B2406: Steering lock unit communication error
(PTC operation) or PTC thermistor activated to prevent solenoid abnormal heating
⦆ B2407: Steering lock unit communication error
(EEPROM) or RRPROM failure
⦆ B2408: Steering lock unit communication error
(solenoid) or solenoid failure
TROUBLESHOOTING HINTS
⦆ Malfunction of the key reminder switch (integrated into the steering lock unit)
⦆ Wiring harness or connector failure of CAN bus line
⦆ Malfunction of the KOS-ECU
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Check key reminder switch connector C-211 and
KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the key reminder switch connector C-211 and KOS-
ECU connector C-102 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-47
STEP 3. Check the wiring harness between the key reminder switch connector C-211 (terminal No. 4, 9) and the KOS-ECU connector C-102 (terminal No. 8, 5).
⦆ Check the signal lines for open circuit and short circuit.
Q:Is the wiring harness between key reminder switch connector C-211 (terminal No. 4, 9) and the KOS-ECU connector C-102 (terminal No. 8, 5) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Replace the key reminder switch, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC B2409: STL unit comm.(No response)
⦆ If the DTC B2409 is set, diagnose the CAN bus lines.
M14209100126USA0000010000
⦆ Whenever the steering lock unit is replaced, ensure that the communication circuit is normal.
42B-48
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Key Reminder Switch and KOS-ECU Circuit
KEY
REMINDER
SWITCH
(PUSH SWITCH)
KOS-ECU
DTC SET CONDITION
When the ignition push switch is pressed, the steering lock unit communicates with KOS-ECU to unlock the
IG knob. If the steering lock unit communication error
(no response) occurs at this time, the DTC is set.
TECHNICAL DESCRIPTION (COMMENT)
When the IG knob unlock communication is performed by pressing the ignition push switch, if the steering lock unit communication error (no response) occurs, the steering lock unit is judged as abnormal.
TROUBLESHOOTING HINTS
⦆ Malfunction of the key reminder switch (integrated into the steering lock unit)
⦆ Wiring harness or connector failure of CAN bus line
⦆ Malfunction of the KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-49
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Check key reminder switch connector C-211 and
KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the key reminder switch connector C-211 and KOS-
ECU connector C-102 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
STEP 3. Check the wiring harness between the key reminder switch connector C-211 (terminal No. 4, 9, 11) and the KOS-
ECU connector C-102 (terminal No. 8, 5, 31).
⦆ Check the signal lines for open circuit and short circuit.
Q:Is the wiring harness between key reminder switch connector C-211 (terminal No. 4, 9, 11) and the KOS-ECU connector C-102 (terminal No. 8, 5, 31) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Replace the key reminder switch, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
42B-50
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC B240A FR antenna(outdoor) open
M14209100024USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
Outside Transmission Antenna Assembly (Driver's Side) Circuit
KEYLESS
OPERATION KEY
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(DRIVER'S SIDE)
RED- YELLO
RED- BLA
SKY B
RED- YELLO
RED- BLA
SKY B
KOS-ECU
ZC604136 0000
Connector: C-22 Connectors: C-32, C-102
C-102
C-32
ZC600876 0032 ZC600875 0030
Connector: D-131
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-51
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
ZC600880 0027
DIAGNOSTIC FUNCTION
If an open circuit is detected in the exterior transmitter antenna (driver's side), the diagnostic trouble code is set.
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (driver's side)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and exterior transmitter antenna assembly (driver's side) connector
D-131 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and exterior transmitter antenna assembly (driver's side) connector D-131 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 17 and 40) and exterior transmitter antenna assembly (driver's side) connector
D-131 (terminal Nos. 3, 2 and 1).
NOTE: Also check intermediate connectors C-22 and C-32 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 and
C-32 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection P.
00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 17 and 40) and exterior transmitter antenna assembly (driver's side) connector D-131
(terminal Nos. 3, 2 and 1) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
42B-52
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 3. Keyless operation system communication test
Check that the communication with the exterior transmitter antenna assembly (driver's side) is normal (Refer to Antenna
Antennas to be checked
Driver side antenna (exterior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the exterior transmitter antenna assembly
(driver's side).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B240B FL antenna(outdoor) open
M14209100025USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
Connector: C-22
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Outside Transmission Antenna Assembly (Passenger's Side) Circuit
KEYLESS
OPERATION KEY
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(PASSENGER'S SIDE)
RED- BLA
SKY B
RED- BLA
SKY B
KOS-ECU
Connector: D-101
42B-53
ZC604137 0000
Connector: C-102
ZC600876 0032
ZC600875 0028
ZC600879 0026
DIAGNOSTIC FUNCTION
If an open circuit is detected in the exterior transmitter antenna (passenger's side), the diagnostic trouble code is set.
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (passenger's side)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
42B-54
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and exterior transmitter antenna assembly (passenger's side) connector
D-101 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and exterior transmitter antenna assembly (passenger's side) connector D-101 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 18 and 40) and exterior transmitter antenna assembly (passenger's side) connector
D-101 (terminal Nos. 3, 2 and 1).
NOTE: Also check intermediate connector C-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 18 and 40) and exterior transmitter antenna assembly (passenger's side) connector D-101
(terminal Nos. 3, 2 and 1) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the exterior transmitter antenna assembly (passenger's side) is normal (Refer to
Antennas to be checked passenger side antenna (exterior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the exterior transmitter antenna assembly
(passenger's side).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-55
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B240C Liftgate antenna(outdoor) open
M14209100026USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
Outside Transmission Antenna Assembly (Liftgate) Circuit
KEYLESS
OPERATION KEY
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(LIFTGATE)
RED- BLA
RED- BLA
SKY B
SKY B
RED- BLA
SKY B
KOS-ECU
ZC604138 0000
Connector: C-22 Connectors: C-32, C-102
C-102
C-32
ZC600876 0032 ZC600875 0030
42B-56
Connectors: F-14, F-17
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
F-17
F-14 (GR)
ZC600882 0008
DIAGNOSTIC FUNCTION
If an open circuit is detected in the exterior transmitter antenna (liftgate), the diagnostic trouble code is set.
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (liftgate)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and exterior transmitter antenna assembly (liftgate) connector F-14for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and exterior transmitter antenna assembly (liftgate) connector D-101 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 19 and 40) and exterior transmitter antenna assembly (liftgate) connector F-14
(terminal Nos. 1, 2 and 3).
NOTE: Also check intermediate connectors C-22, C-32 and
F-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22, C-32 and F-17 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 19 and 40) and exterior transmitter antenna assembly (liftgate) connector F-14(terminal Nos.
1, 2 and 3) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the exterior transmitter
antenna assembly (liftgate) is normal (Refer to Antenna Test P.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-57
Antennas to be checked liftgate side antenna (exterior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the exterior transmitter antenna assembly
(liftgate).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B240D Front antenna(indoor) open
M14209100027USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
Inside Transmission Antenna Assembly (Front) Circuit
KEYLESS
OPERATION KEY
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(FRONT)
RED- BLA
SKY B
RED- BLA
SKY B
KOS-ECU
ZC604160 0000
42B-58
Connector: C-22
Connector: C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC600876 0032
DIAGNOSTIC FUNCTION
If an open circuit is detected in the interior transmitter antenna (front), the diagnostic trouble code is set.
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
PROBABLE CAUSES
⦆ Malfunction of the interior transmitter antenna assembly (front)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
ZC600875 0028
Connector: D-124
ZC600879 0027
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and interior transmitter antenna assembly (front) connector D-124 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and interior transmitter antenna assembly (front) connector D-124 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 16 and 40) and interior
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-59 transmitter antenna assembly (front) connector D-124
(terminal Nos. 3, 2 and 1).
NOTE: Also check intermediate connector C-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 18 and 40) and interior transmitter antenna assembly (front) connector D-124 (terminal Nos.
3, 2 and 1) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the interior transmitter
antenna assembly (front) is normal (Refer to Antenna Test P.
Antennas to be checked
Driver's side antenna (interior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the interior transmitter antenna assembly
(front).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B240E RR antenna(indoor) open
M14209100099USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
42B-60
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Inside Transmission Antenna Assembly (Rear: Driver's Side) Circuit
KEYLESS
OPERATION KEY
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(REAR: DRIVER'S SIDE)
RED- BLA
SKY B
RED- BLA
SKY B
KOS-ECU
Connector: C-22
Connector: D-112
ZC604161 0000
Connector: C-102
ZC600876 0032
ZC600875 0028
ZC600880 0028
DIAGNOSTIC FUNCTION
If an open circuit is detected in the interior transmitter antenna (rear: driver's side), the diagnostic trouble code is set.
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
PROBABLE CAUSES
⦆ Malfunction of interior transmitter antenna assembly (rear: driver's side)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-61
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and interior transmitter antenna assembly (rear: driver’s side) connector D-112 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and interior transmitter antenna assembly (rear: driver’s side) connector D-112 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 15 and 40) and interior transmitter antenna assembly (rear: driver’s side) connector D-112 (terminal Nos. 3, 2 and 1).
NOTE: Also check intermediate connector C-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 15 and 40) and interior transmitter antenna assembly (rear: driver’s side) connector D-112
(terminal Nos. 3, 2 and 1) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the interior transmitter antenna assembly (rear: driver’s side) is normal (Refer to
Antennas to be checked
Rear driver's side antenna (interior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the interior transmitter antenna assembly
(rear: driver’s side).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
42B-62
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B240F RL antenna(indoor) open
M14209100100USA0000010000
When replacing the ECU, always check that the communication circuit is normal.
Inside Transmission Antenna Assembly (Rear: Passenger's Side) Circuit
KEYLESS
OPERATION KEY
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(REAR: PASSENGER'S SIDE)
RED- BLA
SKY B
RED- BLA
SKY B
KOS-ECU
ZC604162 0000
Connector: C-22 Connector: C-102
ZC600876 0032 ZC600875 0028
Connector: D-106
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-63
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request is received from the diagnosis function, the failure is detected.
ZC600880 0029
DIAGNOSTIC FUNCTION
If an open circuit is detected in the interior transmitter antenna (rear: passenger's side), the diagnostic trouble code is set.
PROBABLE CAUSES
⦆ Malfunction of interior transmitter antenna assembly (rear: passenger's side)
⦆ Malfunction of the KOS-ECU
⦆ Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
STEP 1. Check KOS-ECU connector C-102 and interior transmitter antenna assembly (rear: passenger’s side) connector D-106 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and interior transmitter antenna assembly (rear: passenger’s side) connector
D-106 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 2. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 6, 15 and 40) and interior transmitter antenna assembly (rear: passenger’s side) connector D-106 (terminal Nos. 3, 2 and 1).
NOTE: Also check intermediate connector C-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 6, 15 and 40) and interior transmitter antenna assembly (rear: passenger’s side) connector
D-106 (terminal Nos. 3, 2 and 1) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the interior transmitter antenna assembly (rear: passenger’s side) is normal (Refer to
42B-64
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Antennas to be checked
Rear front passenger's side antenna (interior)
OK: Normal is displayed.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the interior transmitter antenna assembly
(rear: passenger’s side).
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes (Refer
NO: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with Intermittent Malfunction P.
00-15).
DTC B2412 LF antenna power voltage
⦆ If diagnostic trouble code No. B2412 is set, diagnose the CAN bus lines.
M14209100030USA0000010000
⦆ When replacing the ECU, always check that the communication circuit is normal.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(FRONT)
Antenna Assembly Circuit
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(REAR: DRIVER'S SIDE)
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(REAR: PASSENGER'S SIDE)
42B-65
RED- BLA
SKY BLUE
RED- BLA
SKY BLUE
RED- BLA
SKY BLUE
RED- BLA
SKY BLUE
KEYLESS ENTRY
OPERATION KEY
KOS-ECU
RED- YELLO
RED- BLA
SKY BLUE
RED- YELLO
RED- BLA
SKY BLUE
SKY BLUE
SKY BLUE
RED- BLA
RED- BLA
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(PASSENGER'S SIDE)
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(DRIVER'S SIDE)
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(LIFTGATE)
ZC604135 0000
42B-66
Connector: C-22
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Connectors: F-14, F-17
Connectors: D-101, D-124
D-101
ZC600876 0032
D-124
Connectors: D-106, D-112, D-131
D-106
ZC600879 0025
D-131
D-112
ZC600880 0026
F-17
F-14 (GR)
ZC600882 0008
DIAGNOSTIC FUNCTION
If KOS-ECU detects an abnormality in power supply of the exterior or interior antennas, KOS-ECU sets diagnostic trouble code No. B2412.
JUDGEMENT CRITERIA
If an abnormality in power supply of the exterior or interior transmitter antenna is detected when power supply of it is turned on, KOS-ECU determines that there is a problem.
PROBABLE CAUSES
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: V.C.I.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-67
STEP 1. Using scan tool MB991958, read CAN bus the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Repair the CAN bus line (Refer to GROUP 54D, CAN bus diagnostics table P.54D-17).
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is KOS-ECU connector C-102 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 3. Check the wiring harness between KOS-ECU and each interior and exterior antenna.
Check the following wiring harnesses for open circuit and short to ground.
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and exterior transmitter antenna assembly (driver's side) connector D-131 (terminal No. 1)
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and exterior transmitter antenna assembly (front passenger's side) connector D-101 (terminal No. 1)
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and interior transmitter antenna (front) connector
D-124 (terminal No. 1)
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and interior transmitter antenna (rear: driver's side) connector D-112 (terminal No. 1)
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and interior transmitter antenna (rear: front passenger's side) connector D-106 (terminal No. 1)
42B-68
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ Wiring harness between KOS-ECU connector C-102 (terminal
No. 40) and exterior transmitter antenna assembly (liftgate) connector F-14 (terminal No. 3)
NOTE: Also check intermediate connectors C-22 and F-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-22 and
F-17 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection P.
00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 and each interior and exterior antenna in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q:Is the diagnostic trouble code set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
DTC B2413: STL unit power voltage
⦆ If the DTC B2413 is set in the steering lock unit, diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set. In this case, the set
DTC is not highly reliable.
⦆
M14209100127USA0000010000
Whenever the steering lock unit (integrated in the key reminder switch) is replaced, ensure that the communication circuit is normal.
Connector: C-102
Connector: C-211
ZC600875 0028
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Key Reminder Switch and KOS-ECU Circuit
KEY
REMINDER
SWITCH
KOS-ECU
42B-69
ZC6008770002
DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply of the steering lock unit, KOS-ECU sets the DTC
B2413.
supply of it is turned on, KOS-ECU determines that there is a problem.
TECHNICAL DESCRIPTION (COMMENT)
If an abnormality in power supply of the exterior or interior transmitter antenna is detected when power
TROUBLESHOOTING HINTS
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the steering lock unit (integrated into the key reminder switch)
⦆ Malfunction of the KOS-ECU
42B-70
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Check key reminder switch connector C-211 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is tye key reminder switch connector C-211 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
STEP 3. Check the power supply circuit to the key reminder switch. Measure the voltage at key reminder switch connector C-211.
(1) Disconnect the connector, and measure at the harness side.
(2) Turn the ignition push switch to the ON position.
Harness side: C-211
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC501040054
42B-71
(3) Measure the voltage between terminal No. 9 and ground.
⦆ The voltage should measure 5 ± 0.5 volts.
Q:Is the measured voltage 5 ± 0.5 volts?
YES: Go to Step 4.
NO:
Check the KOS-ECU connector C-102 and the wiring harness between the KOS-ECU connector C-102 (terminal
No. 5) and the key reminder switch connector C-211
(terminal No. 9), and repair them if necessary. If it is normal,
replace KOS-ECU and register the ID codes. (Refer to P.
NOTE: Check the power supply line for open circuit and short circuit.
STEP 4. Check KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the KOS-ECU connector C-102 in good condition?
YES: Go to Step 5.
NO: Repair the defective connector.
STEP 5. Check the wiring harness between the key reminder switch connector C-211 (terminal No. 11) and the KOS-ECU connector C-102 (terminal No. 31).
Check the ground wires for open circuit.
Q:Is the wiring harness between key reminder switch connector C-211 (terminal No. 11) and the KOS-ECU connector C-102 (terminal No. 31) in good condition?
YES: Go to Step 6.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 6. Replace the key reminder switch, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The procedure is complete.
42B-72
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC B2414 Unlock sensor fail
⦆ If the DTC B2414 is set, diagnose the CAN bus lines.
⦆ When replacing the ECU, always check that the communication circuit is normal.
UNLOCK SENSOR
(FRONT DOOR: RH)
Unlock Sensor Circuit
UNLOCK SENSOR
(FRONT DOOR: LH)
LIGHT GREEN
LIGHT GREEN
LIGHT GREEN
Connectors: C-102, C-126, C-127
C-102
C-127 (BR)
C-126
M14209100115USA0000010000
LIGHT GREEN
LIGHT GREEN
KOS-ECU
ZC604134 0000
Connectors: C-112, C-113
C-112
C-113 (BR)
ZC600876 0031
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-73
Connectors: E-07, E-20
E-07
TECHNICAL DESCRIPTION (COMMENT)
If an abnormality in power supply of the unlock sensor is detected when power supply of it is turned on, KOS-
ECU determines that there is a problem.
E-20
ZC600881 0012
DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply of the unlock sensor, KOS-ECU sets the diagnostic trouble code No. B2414.
TROUBLESHOOTING HINTS
⦆ Damaged wiring harness and connectors
⦆ Malfunctions of the unlock sensor
⦆ Malfunction of the KOS-ECU
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read CAN bus the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III) P.54Af-4."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Repair the CAN bus line (Refer to GROUP 54D, CAN bus diagnostics table P.54D-17).
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102, unlock sensor
(front door: LH) connector E-20 and unlock sensor (front
42B-74
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS door: RH) connector E-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102, unlock sensor (front door: LH) connector E-20 and unlock sensor (front door:
RH) connector E-07 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 24 and 36) and unlock sensor (front door: LH) connector E-20 (terminal Nos. 4 and
2).
NOTE: Also check intermediate connector C-127 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-127 is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 24 and 36) and unlock sensor (front door:
LH) connector E-20 (terminal Nos. 4 and 2) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 25 and 36) and unlock sensor (front door: RH) connector E-07 (terminal Nos. 4 and
2).
NOTE: Also check intermediate connector C-113 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-113is damaged, repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 25 and 36) and unlock sensor (front door:
RH) connector E-07 (terminal Nos. 4 and 2) in good condition?
YES: Go to Step 5.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 5. Replace the unlock sensor, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the DTC is set.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-75
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: Intermittent malfunction is suspected. (Refer to
GROUP 00, How to cope with intermittent malfunctions P.
00-15.)
DTC B2415: RA module power voltage
M14209100032USA0000010000
⦆ When replacing the ECU, always check that the communication circuit is normal.
⦆ If the DTC B2352 is set, diagnose the CAN bus lines.
Receiver Antenna Module and KOS-ECU Circuit
KOS-ECU
RECEIVER ANTENNA
MODULE
Connector: C-30, C-102
C-102
C-30
ZC6008750035
DTC SET CONDITION
If an open circuit or short to ground occurs in the immobilizer antenna, KOS-ECU sets the DTC B2352.
IGNITION
KEY RING
ANTENNA
KEYLESS
OPERATION
KEY
ENCRYPTED CODE
TRANSPONDER
42B-76
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
TECHNICAL DESCRIPTION (COMMENT)
When the ignition switch is turned ON, KOS-ECU sends signals to the receiver antenna module. The receiver antenna transmits random numbers to the emergency key when it receives signals from KOS-
ECU. If an open circuit or short to ground occurs on the wiring harness between KOS-ECU and receiver antenna at this time, KOS-ECU determines that there is a problem.
TROUBLESHOOTING HINTS
⦆ Malfunction of the receiver antenna module
⦆ Damaged wiring harness and connectors
⦆ Malfunction of KOS-ECU
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Check receiver antenna module connector C-30 and KOS-ECU connector C-102 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the eceiver antenna module connector C-30 and KOS-
ECU connector C-102 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-77
STEP 3. Check the wiring harness between the receiver antenna module connector C-30 (terminal No. 8, 12) and the
KOS-ECU connector C-108 (terminal No. 32, 7).
⦆ Check the power supply and ground wires for open circuit.
Q:Is the wiring harness between receiver antenna module connector C-30 (terminal No. 8, 12) and the KOS-ECU connector C-108 (terminal No. 32, 7) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Replace the receiver antenna module, and check whether the diagnostic trouble code is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC B2416: ECU internal error
DTC SET CONDITION
KOS-ECU sets DTC B2416 when it determines itself to be in abnormal status.
TROUBLESHOOTING HINTS
Malfunction of KOS-ECU
TECHNICAL DESCRIPTION (COMMENT)
KOS-ECU determines that the abnormality is present, if the data abnormality is found when the ignition switch is turned ON and then EEPROM is written.
M14209100033USA0000010000
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
42B-78
Data link connector
MB991910
MB991824
MB991827
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4) Check if DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
ZC5019680000
DTC C1608: EEPROM Error
M14209100152USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
KOS-ECU incorporates EEPROM (nonvolatile memory), and that EEPROM stores the TPMS information. When the data in
EEPROM is failed, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
DTC C1900: No Registration
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-79
Q:Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1608 set?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then go to Step 3.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1608 reset?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
M14209100151USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
When the ID registration information of the TPMS transmitter is not stored in KOS-ECU, this code is set. If the ID registration mode is terminated forcibly after one or more wheels are registered in the ID registration mode, the ID information in the
KOS-ECU is erased, and this diagnostic trouble code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
42B-80
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2)
TPMS transmitter ID registration. (Refer to P.42B-172.)
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1900 set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. TPMS transmitter ID registration.
Q:Is the TPMS transmitter ID registration completed normally?
YES: Go to Step 5.
NO: Replace the TPMS transmitter whose ID code cannot be registered. Then go to Step 4.
STEP 4. TPMS transmitter ID registration.
Q:Is the TPMS transmitter ID registration completed normally?
YES: Go to Step 5.
NO: Replace the KOS-ECU and register the ID codes. (refer
to P.42B-12.) Then go to Step 5.
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2)
TPMS transmitter ID registration. (Refer to P.42B-172.)
(3) Turn the ignition switch to the "LOCK" (OFF) position.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-81
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1900 reset?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
DTC C1901: Vehicle Speed Information Abnormality
M14209100153USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
KOS-ECU receives the wheel speed information from ABS-ECU or ASC-ECU via the CAN-bus line. Although KOS-ECU receives the information that the wheel is not currently rotated from ABS-
ECU or ASC-ECU, if the TPMS transmitter sends the information that the wheel is rotated, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
⦆ Malfunction of KOS-ECU
⦆ Malfunction of ABS-ECU or ASC-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Start the engine and drive the vehicle at 5 km/h or more.
42B-82
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1901 set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Check for other diagnostic trouble code.
Check if the diagnostic trouble code is set from ABS-ECU or
ASC-ECU.<Refer to GROUP 35B,diagnostic trouble code chart P.35B-9(vehicles without ASC) or Refer to GROUP 35C, diagnostic trouble code chart P.35C-11(vehicles with ASC)>
Q:Is the check result normal?
YES: Check the registered ID by the transmitter ID check function, and then check the acceleration value of each wheel by the transmitter check function. If the value exceeding 5 g is displayed, replace the relevant TPMS transmitter and register the ID code. If the value exceeding 5 g is not displayed for any TPMS transmitter, replace the KOS-ECU and register the ID codes. (refer
to P.42B-12.) Then go to Step 4.
NO: Carry out the troubleshooting for ABS-ECU or ASC-
ECU.<Refer to GROUP 35B, diagnostic trouble code chart P.
35B-9(vehicles without ASC) or Refer to GROUP 35C, diagnostic trouble code chart P.35C-11(vehicles with ASC)
>. Then go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
(1) Start the engine and drive the vehicle at 5 km/h or more.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1901 set?
YES: Start over at Step 1.
NO: The procedure is complete.
DTC C1910: Transmitter Low Battery Voltage Abnormality 1
DTC C1920: Transmitter Low Battery Voltage Abnormality 2
DTC C1930: Transmitter Low Battery Voltage Abnormality 3
DTC C1940: Transmitter Low Battery Voltage Abnormality 4
M14209100154USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-83
TPMS DTC SET CONDITION
When the voltage of the battery incorporated into the TPMS transmitter becomes low, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Low battery that is incorporated into the TPMS transmitter
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Check the registered ID by the transmitter ID check function, and detect the wheel to which the DTC is set by the transmitter check function. Then, replace the TPMS
transmitter, and register the ID codes. (refer to P.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1910, C1920, C1930 or
C1940 set?
YES: Start over at Step 1.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1910, C1920, C1930 or
C1940 set?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
42B-84
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC C1911: Reception Abnormality 1
DTC C1921: Reception Abnormality 2
DTC C1931: Reception Abnormality 3
DTC C1941: Reception Abnormality 4
M14209100155USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
When KOS-ECU cannot receive the signal from the TPMS transmitter normally, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Check the registered ID by the transmitter ID check function, and detect the wheel to which the DTC is set by the transmitter check function. Then, replace the TPMS
transmitter, and register the ID codes. (Refer to P.
42B-12.) If the ID code of replaced TPMS transmitter
cannot be registered, replace the KOS-ECU and register the ID code. Then go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-85
Q:Is the diagnostic trouble code C1911, C1921, C1931 or
C1941 set?
YES: Start over at Step 1.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1911, C1921, C1931 or
C1941 set?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
DTC C1912: Tire Inflation pressure Warning 1
DTC C1922: Tire Inflation pressure Warning 2
DTC C1932: Tire Inflation pressure Warning 3
DTC C1942: Tire Inflation pressure Warning 4
M14209100156USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
When the tire pressure becomes lower than the specified value, the TPMS transmitter sends the signal to KOS-ECU, and then
KOS-ECU sets this code.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set is:
⦆ Drop of the tire pressure
⦆ Loose TPMS transmitter mounting nut
⦆ Flat tire
⦆ TPMS transmitter malfunction
⦆ KOS-ECU malfunction
⦆ CAN-bus line malfunction
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
42B-86
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
Q:Is DTC C1912, C1922, C1932 or C1942 set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Tire pressure check
Check that the pressure of the tire corresponds to the set DTC is normal.
Q:Is the check result normal?
YES: Go to Step 5.
NO: Go to Step 4.
STEP 4. Tire check
Check that there is no abnormality for the items below.
⦆ Flat tire
⦆ Cracked tire
⦆ Air leak from valve
⦆ Loose TPMS transmitter mounting nut (Refer to P.42C-99.)
Q:Is the check result normal?
YES: Go to Step 5.
NO: Replace it. Then go to Step 7.
STEP 5. Tire pressure check by M.U.T.-III
(1) Check the registered ID code by the transmitter ID check function.
(2) Check the wheel to which the DTC is set by the transmitter check function.
(3) Using the M.U.T.-III, check the relevant tire pressure.
(4) Using the tire pressure gauge, check the tire pressure at the air valve of relevant tire. Then, measure the difference between that checked tire pressure and the tire pressure displayed at the procedure (3).
OK: 20 kPa or less
Q:Is the check result normal?
YES: Go to Step 6.
NO: Replace the TPMS transmitter and register the ID codes. (refer to P.42C-8.) Then go to Step 7.
STEP 6. Tire pressure check by M.U.T.-III
(1) Check the registered ID code by the transmitter ID check function.
(2) Check the wheel to which the DTC is set by the transmitter check function.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-87
(3) Using the M.U.T.-III, check the relevant tire pressure.
(4) Using the tire pressure gauge, check the tire pressure at the air valve of relevant tire. Then, measure the difference between that checked tire pressure and the tire pressure displayed at the procedure (3).
OK: 20 kPa or less
Q:Is the check result normal?
YES: Go to Step 7.
NO: Replace the KOS-ECU and register the ID codes. (refer to P.42C-8.) Then go to Step 7.
STEP 7. Recheck for diagnostic trouble code.
(1) Correct the tire pressure for all wheels.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1912, C1922, C1932 or
C1942 set?
YES: Start over at Step 1.
NO: The procedure is complete.
DTC C1913: Acceleration Sensor Abnormality 1
DTC C1923: Acceleration Sensor Abnormality 2
DTC C1933: Acceleration Sensor Abnormality 3
DTC C1943: Acceleration Sensor Abnormality 4
M14209100157USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
The TPMS transmitter detects if the wheel is rotated and sends the signals to KOS-ECU. When the TPMS transmitter judges that the portion for detecting the wheel rotation is failed, the failure signal is send to KOS-ECU, and KOS-ECU sets this code.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
⦆ Malfunction of KOS-ECU
42B-88
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Check the registered ID by the transmitter ID check function, and detect the wheel to which the DTC is set by the transmitter check function. Then, replace the TPMS
transmitter, and register the ID codes. (refer to P.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1913, C1923, C1933 or
C1943 set?
YES: Start over at Step 1.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1913, C1923, C1933 or
C1943 set?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
DTC C1914: Pressure Sensor Abnormality 1
DTC C1924: Pressure Sensor Abnormality 2
DTC C1934: Pressure Sensor Abnormality 3
DTC C1944: Pressure Sensor Abnormality 4
M14209100158USA0000010000
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-89
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
The TPMS transmitter detects if the tire pressure is normal and sends the signal to KOS-ECU. When the TPMS transmitter judges that the portion for detecting the tire pressure is failed, the failure signal is send to KOS-ECU, and KOS-ECU sets this code.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of TPMS transmitter
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES: Check the registered ID by the transmitter ID check function, and detect the wheel to which the DTC is set by the transmitter check function. Then, replace the TPMS
transmitter, and register the ID codes. (refer to P.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1914, C1924, C1934 or
C1944 set?
YES: Start over at Step 1.
NO: The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
42B-90
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code C1914, C1924, C1934 or
C1944 set?
YES: Replace the KOS-ECU and register the ID codes.
(refer to P.42B-12.) Then start over at Step 1.
NO: The procedure is complete.
DTC U0019: Bus off(CAN-B)
⦆ If DTC U0019 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
If the CAN-B circuit malfunction occurs, the combination meter sets the DTC U0019.
M14209100101USA0000010000
JUDGMENT CRITERIA
If KOS-ECU cannot perform the data transmission in normal conditions due to a malfunction of the CAN-B bus circuit, KOS-ECU determines that there is a problem.
TROUBLESHOOTING HINTS
The CAN bus line may be defective
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1.Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-91
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Go to Step 2.
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, diagnose the CAN bus line.
(1) Turn the ignition switch to the "ON" position.
(2) Diagnose the CAN bus line.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: The trouble can be an intermittent malfunction
(Refer to GROUP 00 - How to use Troubleshooting/ inspection Service Points - How to Cope with Intermittent
Malfunction P.00-15).
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
DTC U0141: ETACS-ECU CAN timeout
⦆ If the DTC U0141 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
If the signal from ETACS-ECU cannot be received, the KOS-ECU sets the DTC U0141.
TROUBLESHOOTING HINTS
⦆ Malfunction of CAN bus line
⦆ Malfunction of KOS-ECU
⦆ Malfunction of ETACS-ECU
M14209100102USA0000010000
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
42B-92
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code
Check again if the DTC is set to the ETACS-ECU.
Q:Is the DTC set?
YES: Diagnose the ETACS-ECU (Refer to GROUP 54Ad - P.
54Ad-8).
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-93
DTC U0151: SRS-ECU CAN timeout
⦆ If the DTC U0151 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
If no signal from SRS-ECU can be received, KOS-
ECU sets the diagnostic trouble code No. U0151.
M14209100103USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective
⦆ The SRS-ECU may be defective
⦆ Malfunction of KOS-ECU
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the SRS-ECU diagnostic trouble code
Check again if the DTC is set to the SRS-ECU.
Q:Is the DTC set?
YES: Troubleshoot the SRS (Refer to GROUP 52B,
Troubleshooting P.52B-33).
42B-94
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC U0154: Occupant classification-ECU CAN timeout
⦆ If the DTC U0154 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
M14209100165USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The KOS-ECU may be defective.
⦆ The occupant classification-ECU may be defective.
DIAGNOSTIC FUNCTION
When the signals from occupant classification-ECU cannot be received, the KOS-ECU sets the DTC
U0154.
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-95
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the SRS-ECU diagnostic trouble code.
Check if DTC is set to the SRS-ECU.
Q:Is the DTC set?
YES: Troubleshoot the SRS. (Refer to GROUP 52B,
Diagnosis P.52B-33.)
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
42B-96
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC U0155: Combination meter CAN timeout
⦆ If the diagnostic trouble code No. U0155 is set, be sure to diagnose the CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
TROUBLESHOOTING HINTS
⦆ Malfunction of CAN bus line
⦆ Combination meter malfunction
⦆ Malfunction of KOS-ECU
M14209100104USA0000010000
TROUBLE JUDGMENT
If no signal from the combination meter can be received, KOS-ECU sets the DTC U0155.
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code
Check if DTC is set to the combination meter.
Q:Is the DTC set?
YES: Troubleshoot the combination meter. (Refer to GROUP
54Ab, Diagnosis P.54Ab-7.)
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-97
NO: Go to Step 3.
STEP 3. Using scan tool MB991958, read the A/C-ECU diagnostic trouble code.
Check if the DTC U0155 is set to the A/C-ECU.
Q:Is the DTC set?
YES: Go to Step 4.
NO: Go to Step 5.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace the combination meter.
NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the combination meter and the ETACS-ECU. (Refer to GROUP 00, How to Cope with Intermittent Malfunction P.
00-15)
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the combination meter and the ETACS-ECU. (Refer to GROUP 00, How to Cope with Intermittent Malfunction P.
00-15)
DTC U0164: A/C-ECU CAN timeout
⦆ If the DTC U0164 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
If the signal from A/C-ECU cannot be received, the
KOS-ECU sets the DTC U0164.
M14209100105USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The A/C-ECU may be defective.
⦆ The KOS-ECU may be defective.
42B-98
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the A/C diagnostic trouble code
Check if DTC is set to the A/C-ECU.
Q:Is the DTC set?
YES: Troubleshoot the A/C (Refer to GROUP 55A, Manual A/
C Diagnosis P.55A-8or GROUP 55B, Auto A/C Diagnosis P.
55B-7).
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-99
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC U0184: Audio CAN timeout
⦆ If the DTC U0184 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When the signals from radio and CD player or CD changer cannot be received, the KOS-ECU sets the
DTC U0184.
M14209100119USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The KOS-ECU may be defective.
⦆ The radio and CD player or CD changer may be defective.
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
42B-100
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 2. Using scan tool MB991958, read the audio diagnostic trouble code
Check again if the DTC is set to the audio.
Q:Is the DTC set?
YES: Troubleshoot the radio and CD player. Refer to GROUP
54B, Diagnosis <radio and CD player> P.54B-7.
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC U0197: Hands free module CAN timeout
⦆ If the DTC U0197 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
M14209100166USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The KOS-ECU may be defective.
⦆ The hands free module may be defective.
DIAGNOSTIC FUNCTION
When the signals from hands free module cannot be received, the KOS-ECU sets the DTC U0197.
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-101
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the hands free module diagnostic trouble code
Check again if the DTC is set to the hands free module.
Q:Is the DTC set?
YES: Troubleshoot the hands-free cellular phone system.
Refer to GROUP 54Ae, Diagnosis <hands-free cellular phone system>.
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
42B-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DTC U0245: Audio visual navigation unit CAN timeout
⦆ If the DTC U0245 is set, be sure to diagnose the
CAN bus line.
⦆ When replacing the ECU, always check that the communication circuit is normal.
M14209100167USA0000010000
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The KOS-ECU may be defective.
⦆ The audio visual navigation unit may be defective.
DIAGNOSTIC FUNCTION
When the signals from audio visual navigation unit cannot be received, the KOS-ECU sets the DTC
U0245.
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the audio visual navigation unit diagnostic trouble code.
Check if DTC is set to the audio visual navigation unit.
Q:Is the DTC set?
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-103
YES: Troubleshoot the MMCS. (Refer to GROUP 54B,
Diagnosis <MMCS>.)
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
DTC U1412: Implausible Vehicle Speed Signal Received
M14209100150USA0000010000
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble code diagnosis P.54D-17).
TPMS DTC SET CONDITION
KOS-ECU receives the wheel speed information from ABS-ECU or ASC-ECU via the CAN-bus line. If KOS-ECU cannot receive the information about the wheel speed sensor from ABS-ECU or
ASC-ECU, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
⦆ Damaged wiring harness and connector
⦆ Malfunction of ABS-ECU or ASC-ECU
⦆ Malfunction of KOS-ECU
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
42B-104
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Q:Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code U1412 set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Check for other diagnostic trouble code.
Check if the diagnostic trouble code is set from ABS-ECU or
ASC-ECU.<Refer to GROUP 35B,diagnostic trouble code chart P.35B-9(vehicles without ASC) or Refer to GROUP 35C, diagnostic trouble code chart P.35C-11(vehicles with ASC)>
Q:Is the check result normal?
YES: Replace the KOS-ECU. Then go to Step 4.
NO: Carry out the troubleshooting for ABS-ECU or ASC-
ECU.<Refer to GROUP 35B, diagnostic trouble code chart P.
35B-9(vehicles without ASC) or Refer to GROUP 35C, diagnostic trouble code chart P.35C-11(vehicles with ASC)
>. Then go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the diagnostic trouble code U1412 reset?
YES: Start over at Step 1.
NO: The procedure is complete.
DTC U1415: Coding not completed/Data fail
⦆ If the DTC U1415 is set, diagnose the CAN bus lines.
⦆ When replacing the ECU, always check that the communication circuit is normal.
M14209100106USA0000010000
DIAGNOSTIC FUNCTION
If the vehicle information data is not registered to the combination meter, the KOS-ECU sets the DTC
U1415.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
JUDGMENT CRITERIA
With the global coding counter value "0," if all the global coding data (vehicle information) are not stored, the KOS-ECU determines that a problem has occurred.
TROUBLESHOOTING HINTS
⦆ The CAN bus line may be defective.
⦆ The KOS-ECU may be defective.
⦆ The ETACS-ECU may be defective.
42B-105
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code.
Check if DTC is set to the ETACS-ECU.
Q:Is the DTC set?
YES: Troubleshoot the ETACS-ECU. Refer to P.54Ad-8.
NO: Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
42B-106
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
Code No.U1417 Implausible coding data
M14209100107USA0000010000
⦆ If diagnostic trouble code U1417 is set in KOS-ECU, always diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set. In this case, the set diagnostic trouble code is not highly reliable.
⦆ Before replacing the ECU, ensure that the communication circuit is normal.
⦆ When the diagnostic trouble code U1417 is set in KOS-
ECU, the diagnostic trouble code may also be set in
ETACS-ECU. When the diagnostic trouble code is set in
ETACS-ECU, carry out the diagnosis of the diagnostic trouble code for ETACS-ECU first.
CIRCUIT OPERATION
KOS-ECU receives the vehicle information stored in the ETACS-
ECU via CAN bus lines.
DTC SET CONDITIONS
KOS-ECU communicates with ETACS-ECU via CAN bus lines.
This diagnostic trouble code is set when the vehicle information received from the ETACS-ECU is invalid.
PROBABLE CAUSES
⦆ Malfunction of ETACS-ECU
⦆ Engine control module malfunction
⦆ ETACS-ECUs have been interchanged between two vehicles.
⦆ KOS-ECU malfunction
⦆ External noise interference
⦆ WCMs have been interchanged between two vehicles.
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-107
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the other system diagnostic trouble code.
Check if DTC is set to the ETACS-ECU or engine control module.
Q:Is the DTC set?
YES (DTC is set to ETACS-ECU.): Troubleshoot the ETACS.
(Refer to GROUP 54Ad, Diagnosis P.54Ad-8.)
YES (DTC is set to the engine control module.):
Troubleshoot the MFI system. (Refer to GROUP 13Ab,
Diagnosis P.13Ab-44.)
NO: Go to Step 3.
STEP 3. Check part number of ETACS-ECU.
Check the part number of ETACS-ECU.
OK: 8637A213
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace ETACS-ECU.
STEP 4. Check part number of KOS-ECU.
Check the part number of WCM.
OK: 8637A305
Q:Is the check result normal?
YES: Go to Step 5.
NO: Replace KOS-ECU and register the ID codes. (Refer
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) Erase the DTC.
42B-108
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer
NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-3).
TROUBLE SYMPTOM CHART
Trouble symptom
Cannot communicate with KOS-ECU using the scan tool.
Abnormality in KOS-ECU power supply and ground circuits
Keyless operation warning display does not disappear.
IG knob will not turn (keyless operation is not recognized).
The engine will not start with KOS (IG knob operates normally).
No Door will be Locked or Unlocked by Operating A Lock Switch On Any Door, or by touching The Unlock Sensor.
Driver's Door Lock Switch does not Work.
Driver's Door Unlock Sensor does not Work.
Front Passenger's Door Lock Switch does not Work.
Front Passenger's Door Unlock Sensor does not Work.
Lock Switch (Liftgate) does not Work.
Liftgate Lock Release Handle does not Work.
Keyless Entry System does not Work.
KOS Timer Lock Function does not Work.
M14209100045USA0000010000
Inspection procedure number
Reference page
1
2
3
4
5
6
7
8
9
10
11
12
13
14
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-109
Trouble symptom
The Dome Light and The Turn-signal Lights do not Operate through The
Answerback Function.
Outer Tone alarm does not Sound.
Inspection procedure number
15
16
Reference page
SYMPTOM PROCEDURES
Inspection Procedure 1: Cannot communicate with KOS-ECU using the scan tool.
M14209100077USA0000010000
Connector: C-125
TROUBLESHOOTING HINTS
⦆ Damaged wiring harness and connectors
⦆ Malfunction of KOS-ECU
Connector: C-301
C-125 (B)
ZC6008750000
ZC6008780000
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. V.C.I. status check
Check that the V.C.I. indicator light is illuminated in green.
Q:Is it illuminated in green?
YES: Diagnose the CAN bus line, and repair if necessary.
(Refer to GROUP 54D, Diagnosis P.54D-17.)
42B-110
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
NO: Go to Step 2.
STEP 2. Check ETACS-ECU connector C-301 and data link connector C-125 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the ETACS-ECU connector C-301 and data link connector C-125 in good condition?
YES: Go to Step 3.
NO: Repair the defective connector.
STEP 3. Check the wiring harness between the ETACS-ECU connector C-301 (terminal No. 4, 5) and the data link connector C-125 (terminal No. 14, 6).
⦆ Check the power supply line for open circuit.
Q:Is the wiring harness between ETACS-ECU connector
C-301 (terminal No. 4, 5) and the data link connector C-125
(terminal No. 14, 6) in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Check the wiring harness between the data link connector C-125 (terminal No. 4, 5) and the ground.
⦆ Check the ground wires for open circuit.
Q:Is the wiring harness between data link connector C-125
(terminal No. 4, 5) and the ground in good condition?
YES: Check the scan tool (M.U.T.-III). (Refer to M.U.T.-
III User's Manual).
NO: Repair the wiring harness.
Inspection Procedure 2: Abnormality in KOS-ECU power supply and ground circuits
M14209100078USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
IG1
RELAY
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
KOS-ECU Power Supply Circuit
ETACS-ECU
42B-111
POWER
SUPPLY
Connector: C-102
Connector: C-317
ZC600875 0028
ZC6008780006
KOS-ECU
42B-112
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
TROUBLESHOOTING HINTS
⦆ Damaged wiring harness and connectors
⦆ Malfunction of KOS-ECU
STEP 1. Check KOS-ECU connector C-102 and ETACS-ECU connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is the KOS-ECU connector C-102 and ETACS-ECU connector C-317 in good condition?
YES: Go to Step 2.
NO: Repair the defective connector.
STEP 2. Check the wiring harness between the KOS-ECU connector C-102 (terminal No. 38, 39) and the ETACS-ECU connector C-317 (terminal No. 10, 5).
⦆ Check the power supply and ground wires for open circuit.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal No. 38, 39) and the ETACS-ECU connector
C-317 (terminal No. 10, 5) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 3. Retest the system
Q:Does the abnormality in KOS-ECU power supply and ground circuits in good condition?
YES: The trouble can be an intermittent malfunction
(Refer to GROUP 00, How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).
NO: Replace KOS-ECU and register the ID codes. (Refer
Inspection Procedure 3: Keyless operation warning display does not disappear.
M14209100071USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
⦆ Malfunction of combination meter
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
TROUBLESHOOTING HINTS
⦆ Malfunction of CAN bus line
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-113
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
Check the DTC B2415 is set to the KOS-ECU.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC B2415 is set?
YES:
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code.
Check if DTC is set in the combination meter.
Q:Is the DTC set?
YES: Troubleshoot the combination meter. (Refer to GROUP
54Ab, Diagnosis .)
NO: Go to Step 3.
STEP 3. Using scan tool MB991958, read the KOS-ECU trouble code.
Check if DTC is set to the KOS-ECU.
Q:Is the DTC set?
YES:
NO: Go to Step 4.
STEP 4. Check of the troubles.
Check that the keyless operation warning display turns OFF unless the flashing or illumination conditions are met.
Q:Is the DTC set?
YES: The trouble can be an intermittent malfunction
(Refer to GROUP 00 - How to use Troubleshooting/ inspection Service Points - How to Cope with Intermittent
Malfunction P.00-15).
NO: Replace KOS-ECU and register the ID codes. (Refer
42B-114
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Inspection Procedure 4: IG knob will not turn (keyless operation is not recognized).
M14209100087USA0000010000
Before replacing the ECU, ensure that the communication circuit is normal.
KOS-ECU
RECEIVER
ANTENNA MODULE
RELAY
BOX
ETACS-ECU
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
KOS-ECU System Circuit
FUSIBLE
LINK 36
42B-115
(PUSH SWITCH)
WHEN
REMOVING
KEY: ON
KEY
REMINDER
SWITCH
KEYLESS
OPERATION
KEY
IGNITION
KEY RING
ANTENNA
KEY ID
TRANSPONDER
42B-116
Connectors: C-30, C-102
C-30
C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
TROUBLESHOOTING HINTS
⦆ Configration function setting
⦆ Damaged wiring harness and connectors
⦆ Malfunctions of the steering lock push switch
⦆ Malfunction of the keyless operation key
⦆ Malfunction of the receiver antenna module
⦆ Malfunction of KOS-ECU
ZC600875 0029
Connector: C-315
ZC6008780017
DIAGNOSIS
Required Special Tools:
⦆ MB992006: Extra fine probe
⦆ MB991223: Harness set
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the power supply circuit and the ground circuit to KOS-ECU.
Refer to Inspection procedure 2 "Abnormality in KOS-ECU
power supply and ground circuits" P.42B-110.
Q:Is the power supply circuit and the ground circuit to KOS-
ECU in good condition?
YES: Go to Step 2.
NO: Repair the power supply circuit and the ground circuit to KOS-ECU.
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-117
STEP 2. Using scan tool MB991958, diagnose the CAN bus line.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 3.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 3. Using scan tool MB991958, read the KOS-ECU diagnostic trouble code.
Check if DTC is set to the KOS-ECU.
Q:Is the DTC set?
YES:
Troubleshoot the KOS. (Refer to P.42B-18.)
NO: Go to Step 4.
STEP 4. Using scan tool MB991958, Check the configuration function.
Use the ETACS-ECU configuration function to check that the
"KOS feature" is set to "Both enable" or "ENG strt enable".
Q:Is it set to "Both enable" or "ENG strt enable"?
YES: Go to Step 5.
NO: Use the ETACS-ECU configuration function to set the
"KOS feature" to "Both enable" or "ENG strt enable".
STEP 5. Check the ignition push switch. Measure the resistance at KOS-ECU connector C-102.
(1) Disconnect the KOS-ECU connector C-102.
(2) With the IG knob push switch pressed, measure the resistance at the harness-side connector.
42B-118
Harness side: C-102
Harness side: C-315
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC501041052
ZC5010410053
(3) Resistance between the KOS-ECU connector C-102 terminal No. 8 and 34.
OK: The resistance should be 2 Ω or less.
Q:Is the measured resistance 2 Ω or less?
YES: Go to Step 6.
NO: Check the KOS-ECU C-102 connector, the key reminder switch connector C-211, the ETACS-ECU connector C-317, and the wiring harness between the KOS-ECU connector
C-102 (terminal No. 8, 34) and the C-211 key reminder switch connector (terminal No. 4, 10), and between the key reminder switch connector C-211 (terminal No. 1) and the
ETACS-ECU connector C-317 (terminal No. 10), and repair them if necessary. If they are normal, replace the key reminder switch.
STEP 6. Check the key reminder switch. Measure the resistance at ETACS-ECU connector C-315.
(1) Disconnect the ETACS-ECU connector C-315.
(2) Measure the resistance at the harness-side connector with the ignition key removed from the ignition key cylinder.
(3) Resistance between the ETACS-ECU connector C-315 terminal No. 13 and the ground.
OK: The resistance should be 2 Ω or less.
Q:Is the measured resistance 2 Ω or less?
YES: Go to Step 7.
NO: Check the key reminder switch connector C-211, the
ETACS-ECU connector C-315, the wiring harness between the key reminder switch connector C-211 (terminal No. 3) and the ETACS-ECU connector C-315 (terminal No. 13), and between the key reminder switch connector C-211 (terminal
No. 2) and the ground. If they are normal, replace the key reminder switch.
STEP 7. Check with another registered keyless operation key.
Q:Does the IG knob turn? (Is the keyless operation key recognised?)
YES: Replace the keyless operation key with which the IG knob does not turn (no recognition) and register the ID
NO: Go to Step 8.
STEP 8. Check KOS-ECU connector C-102 and receiver antenna module connector C-30 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Is KOS-ECU connector C-102 and receiver antenna module connector C-30 in good condition?
YES: Go to Step 9.
NO: Repair the defective connector.
Harness side: C-30
Normal waveform
5.0V
0V
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-119
STEP 9. Check the wiring harness between KOS-ECU connector C-102 (terminal No. 11, 12, 32) and receiver antenna module connector C-30 (terminal No. 2, 1, 8).
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal No. 11, 12, 32) and receiver antenna module connector C-30 (terminal No. 2, 1, 8) in good condition?
YES: Go to Step 10.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the high-beam headlights illuminate normally.
STEP 10. Check the power supply circuit to the reciever antenna module. Measure the voltage at reciever antenna module connector C-30.
(1) Disconnect reciever antenna module connector C-30 and measure the voltage available at the harness side of the connector.
(2) Measure the voltage between terminal No. 3 and ground.
⦆ The voltage should measure 5 volt.
Q:Is the measured voltage 5 volt?
YES: Go to Step 11.
NO: Replace KOS-ECU and register the ID codes. (Refer
ZC501040056
STEP 11. Using the oscilloscope, check the waveform at receiver antenna module connector C-30 and ground by backprobing.
(1) Do not disconnect the receiver antenna module connector
C-30.
(2) Connect an oscilloscope to receiver antenna module connector C-30 terminal No. 3 and ground by backprobing.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
⦆ Check the waveform.
Q:Is the waveform normal?
YES: Go to Step 12.
NO: Replace the receiver antenna module.
ZC604126 0000
STEP 12. Check of the troubles.
Check that the IG turns (keyless operation is recognised).
Q:Dose the IG knob will not turn (keyless operation is not recognized) in good condition?
42B-120
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES: The procedure is complete.
NO: Replace KOS-ECU and register the ID codes. (Refer
Inspection Procedure 5: The engine will not start with KOS (IG knob operates normally).
M14209100108USA0000010000
Before replacing the ECU, ensure that the communication circuit is normal.
TROUBLESHOOTING HINTS
⦆ The CAN bus line is defective.
⦆ Malfunction of the MFI system
⦆ Function setting error or no setting with customization
⦆ VIN not written or unmatched
Data link connector
MB991910
MB991824
ZC501967
AC404789
DIAGNOSIS
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the CAN bus line found to be normal?
YES: Go to Step 2.
NO: Repair the CAN bus line. (Refer to GROUP 54D,
Diagnosis P.54D-17).
MB991827
ZC5019680000
STEP 2. Using scan tool MB991958, read the KOS-ECU diagnostic trouble code.
Check if DTC is set to the KOS-ECU.
Q:Is the DTC set?
YES:
Troubleshoot the KOS. (Refer to P.42B-18.)
NO: Go to Step 3.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-121
STEP 3. Using scan tool MB991958, Check the configuration function.
Use the ETACS-ECU configuration function to check that the
"KOS feature" is set to "Both enable" or "ENG strt enable".
(1) Turn the ignition switch to the "ON" position.
(2) Use the ETACS-ECU configuration function to check that the
"KOS feature" is set to "Both enable" or "ENG strt enable".
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is it set to "Both enable" or "ENG strt enable"?
YES: Go to Step 4.
NO: Use the ETACS-ECU configuration function to set the
"KOS feature" to "Both enable" or "ENG strt enable".
STEP 4. Check that the engine starts.
Q:Does the engine start?
YES: The procedure is complete.
NO: Refer to GROUP 13Ab - Troubleshooting P.13Ab-44.
INSPECTION PROCEDURE 6: No Door will be Locked or Unlocked by Operating A Lock
Switch On Any Door, or by touching The Unlock Sensor.
M14209100109USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
ETACS-ECU and Key Reminder Switch Circuit
ETACS-ECU
WHEN
REMOVING
KEY: ON
REC- WHITE
KEY
REMINDER
SWITCH
ZC603127 0000
42B-122
Connector: C-211
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
PROBABLE CAUSES
⦆ Malfunction of the CAN bus lines
⦆ Malfunction of the central door locking system
⦆ Malfunction of the keyless operation key
⦆ Malfunction of the key reminder switch
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
⦆ Function setting error or no setting with a customization
ZC6008770002
Connector: C-315
ZC6008780017
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-123
STEP 1. Using scan tool MB991958, read CAN bus the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Repair the CAN bus line (Refer to GROUP 54D, CAN bus diagnostics table P.54D-17).
NO: Go to Step 2.
Data link connector
MB991910
MB991827
MB991824
ZC5019680000
ZC501967
AC404789
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 3.
MB991827
ZC5019680000
STEP 3. Check the central door locking system operation
Check that the central door locking system works normally.
Q:Is the check result normal?
YES: Go to Step 4.
42B-124
Connector C-315
(harness side)
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC5007880051
NO: Perform troubleshooting for the central door locking system (Refer to GROUP 42Ab, Trouble symptom chart P.
42Ab-11).
STEP 4. Check the customize function.
Check that either of the followings other than "ENG strt enable" or "Both disabled" are set for "KOS feature" with the customization function.
⦆ Both enable
⦆ Door Entry enable
Q:Is the check result normal?
YES: Go to Step 5.
NO: Set either of the followings other than "ENG strt enable" or "Both disabled" for "KOS feature" with the
customization function (Refer to P.42B-170).
STEP 5. Key reminder switch check.
(1) Disconnect the C-315 ETACS-ECU connector.
(2) Measure the resistance at the harness-side connector with the ignition key removed from the ignition key cylinder.
(3) Check for continuity between the C-315 ETACS-ECU connector terminal No. 13 and the ground.
OK: Continuity exists (2 Ω or less)
Q:Is the check result normal?
YES: Go to Step 6.
NO: Check the C-209 key reminder switch connector, the
C-315 ETACS-ECU connector, the wiring harness between the
C-211 key reminder switch connector (terminal No. 3) and the C-315 ETACS-ECU connector (terminal No. 13), and between the C-211 key reminder switch connector (terminal
No. 2) and the ground. If they are normal, replace the key reminder switch.
STEP 6. Check with another registered keyless operation key.
Q:Does the IG knob turn? (Is the keyless operation key recognised?)
YES: Replace the keyless operation key with which the IG knob does not turn (no recognition) and register the ID
NO: Go to Step 7.
STEP 7. Check of the troubles.
Operate the lock switch and check that the door can be locked and unlocked. Also, check that the unlock sensor can lock and unlock the door.
Q:Is the check result normal?
YES: The procedure is complete.
NO: Replace KOS-ECU and register the ID codes (Refer
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-125
INSPECTION PROCEDURE 7: Driver's Door Lock Switch does not Work.
M14209100110USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
Lock switch (Front Door: LH) Circuit
LOCK SWITCH
(FRONT DOOR: LH)
GREEN -WHITE
Connectors: C-102, C-126, C-127
C-102
C-127 (BR)
C-126
Connector: E-23
GREEN -WHITE
KOS-ECU
ZC603128 0000
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (driver's side)
⦆ Malfunction of the lock switch (front door: LH)
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
E-23 (GR)
ZC600881 0008
42B-126
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and lock switch
(front door: LH) connector E-23 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and lock switch (front door: LH) connector E-23 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the driver’s door lock switch works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal No. 21) and lock switch (front door: LH) connector E-23 (terminal No. 1) and lock switch
(front door: LH) connector E-23 (terminal No. 2) and ground.
NOTE: Also check intermediate connector C-126 and C-127 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-126 and
C-127 is damaged, repair or replace the damaged component
Lock switch
Door outside handle base
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-127
(s) as described in GROUP 00E, Harness Connector
Inspection P.00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal No. 21) and lock switch (front door: LH) connector E-23 (terminal No. 1) and lock switch (front door: LH) connector E-23 (terminal No. 2) and ground in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the driver’s door lock switch works normally.
STEP 4. Lock switch (front door: LH) check.
(1) Remove the door outside handle base (Refer to GROUP
42Ab, Door Handle and Latch P.42Ab-102).
(2) Check continuity when the lock switch (front door: LH) is operated to "ON" or "OFF" position.
Switch position
Terminal number
Normal value
ON 1 - 2
OFF 1 - 2
Continuity exists (2 Ω or less)
Open circuit
ZC6000970000
Q:Is the lock switch (front: LH) normal?
YES: Go to Step 5.
NO: Replace the door outside handle base. Check that the driver’s door lock switch works normally.
STEP 5. KOS communication test
Using scan tool (M.U.T-III), perform the antenna communication test to check that the exterior transmitter antenna (driver's side)
communicates normally (Refer to P.42B-169).
Q:Is the check result normal?
YES: Go to Step 6.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240A (Refer to P.42B-18).
STEP 6. Check of the troubles.
Operate the lock switch (front door: LH) and check that the door and liftgate can be locked.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
42B-128
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
INSPECTION PROCEDURE 8: Driver's Door Unlock Sensor does not Work.
M14209100111USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
Unlock Sensor (Front Door: LH) Circuit
UNLOCK SENSOR
(FRONT DOOR: LH)
LIGHT GREEN
Connectors: C-102, C-126, C-127
C-102
C-127 (BR)
C-126
Connector: E-20
LIGHT GREEN
KOS-ECU
ZC603129 0000
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (driver's side)
⦆ Malfunction of the unlock sensor (front door: LH)
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
ZC600881 0009
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-129
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and unlock sensor (front door: LH) connector E-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and unlock sensor (front door: LH) connector E-20 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the driver’s door unlock sensor works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 24 and 36) and unlock sensor (front door: LH) connector E-20 (terminal Nos. 4 and
2) and unlock sensor connector E-20 (terminal No. 6) and ground.
NOTE: Also check intermediate connector C-126 and C-127 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-126 and
42B-130
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
C-127 is damaged, repair or replace the damaged component
(s) as described in GROUP 00E, Harness Connector
Inspection P.00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal Nos. 24 and 36) and unlock sensor (front door: LH) connector E-20 (terminal Nos. 4 and 2) and unlock sensor connector E-20 (terminal No. 6) and ground in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the driver’s door unlock sensor works normally.
STEP 4. KOS communication test.
Using scan tool (M.U.T-III), perform the antenna communication test to check that the exterior transmitter antenna (driver's side)
communicates normally (Refer to P.42B-169).
Q:Is the check result normal?
YES: Go to Step 5.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240A (Refer to P.42B-18).
STEP 5. Check of the troubles.
Operate the unlock sensor (front door: LH) and check that the door and liftgate can be locked.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
INSPECTION PROCEDURE 9: Front Passenger's Door Lock Switch does not Work.
M14209100112USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Lock switch (Front Door: RH) Circuit
LOCK SWITCH
(FRONT DOOR: RH)
42B-131
Connector: C-102
KOS-ECU
Connector: E-08
E-08 (GR)
ZC603130 0000
Connectors: C-112, C-113
ZC600875 0028
C-112
C-113 (BR)
ZC6008760022
ZC600881 0010
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (front passenger's side)
⦆ Malfunction of the lock switch (front door: RH)
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
42B-132
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and lock switch
(front door: RH) connector E-08 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and lock switch (front door: RH) connector E-08 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the front passenger’s door lock switch works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal No. 23) and lock switch (front door: RH) connector E-08 (terminal No. 1) and lock switch
(front door: RH) connector E-08 (terminal No. 2) and ground.
NOTE: Also check intermediate connector C-112 and C-113 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-112 and
C-113 is damaged, repair or replace the damaged component
(s) as described in GROUP 00E, Harness Connector
Inspection P.00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal No. 23) and lock switch (front door: RH) connector E-08 (terminal No. 1) and lock switch (front door: RH) connector E-08 (terminal No. 2) and ground in good condition?
YES: Go to Step 4.
Lock switch
Door outside handle base
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-133
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the front passenger’s door lock switch works normally.
STEP 4. Lock switch (front door: RH) check.
(1) Remove the door outside handle base (Refer to GROUP
42Ab, Door Handle and Latch P.42Ab-102).
(2) Check continuity when the lock switch (front door: RH) is operated to "ON" or "OFF" position.
Switch position
Terminal number
Normal value
ON 1 - 2
OFF 1 - 2
Continuity exists (2 Ω or less)
Open circuit
ZC6000970000
Q:Is the lock switch (front: RH) normal?
YES: Go to Step 5.
NO: Replace the door outside handle base. Check that the front passenger’s door lock switch works normally.
STEP 5. KOS communication test.
Using scan tool (M.U.T.-III), perform the antenna communication test to check that the exterior transmitter antenna (front
passenger's door) communicates normally (Refer to P.
Q:Is the check result normal?
YES: Go to Step 6.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240B (Refer to P.42B-18).
STEP 6. Check of the troubles.
Operate the lock switch (front passenger’s side) to check that the door can be locked.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected. (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
INSPECTION PROCEDURE 10: Front Passenger's Door Unlock Sensor does not Work.
M14209100113USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
42B-134
Connector: C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Unlock Sensor (Front Door: RH) Circuit
UNLOCK SENSOR
(FRONT DOOR: RH)
LIGHT GREEN
LIGHT GREEN
KOS-ECU
Connector: E-07
ZC603131 0000
Connectors: C-112, C-113
ZC600875 0028
C-112
C-113 (BR)
ZC6008760022
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (front passenger's side)
⦆ Malfunction of the unlock sensor (front door: RH)
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicles Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-135
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and unlock sensor (front door: RH) connector E-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and unlock sensor (front door: RH) connector E-07 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the front passenger’s door unlock sensor works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 25 and 36) and unlock sensor (front door: RH) connector E-07 (terminal Nos. 4 and
2) and unlock sensor (front: RH) connector E-07 (terminal
No. 6) and ground.
NOTE: Also check intermediate connector C-112 and C-113 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-112 and
C-113 is damaged, repair or replace the damaged component
(s) as described in GROUP 00E, Harness Connector
Inspection P.00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal Nos. 25 and 36) and unlock sensor (front door: RH) connector E-07 (terminal Nos. 4 and 2) and unlock sensor (front: RH) connector E-07 (terminal No. 6) and ground in good condition?
42B-136
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the front passenger’s door unlock sensor works normally.
STEP 4. KOS communication test
Using scan tool (M.U.T.-III), perform the antenna communication test to check that the exterior transmitter antenna (front
passenger's door) communicates normally (Refer to P.
Q:Is the check result normal?
YES: Go to Step 5.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240B (Refer to P.42B-18).
STEP 5. Check of the troubles
Operate the unlock sensor (front door: RH) and check that the door and liftgate can be locked.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
INSPECTION PROCEDURE 11: Lock Switch (Liftgate) does not Work.
M14209100075USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Lock switch (Liftgate) Circuit
LOCK SWITCH
(LIFTGATE SIDE)
42B-137
KOS-ECU
Connector: D-12
ZC603132 0000
Connector: C-32
Connector: C-102
ZC600875 0027
Connector: F-08
ZC600880 0006
ZC600875 0028 ZC600882 0002
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (liftgate)
⦆ Malfunction of the lock switch (liftgate side)
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
42B-138
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and lock switch
(liftgate side) connector F-08 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and lock switch (liftgate side) connector F-08 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the lock switch (liftgate) works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal No. 22) and lock switch (liftgate side) connector F-08 (terminal No. 1) and lock switch
(liftgate side) connector F-08 (terminal No. 2) and ground.
NOTE: Also check intermediate connector C-32 and D-12 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-32 and
D-12 is damaged, repair or replace the damaged component(s)
Liftgate lock release handle
Section A – A
A
A
Lock switch
Lock switch
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-139 as described in GROUP 00E, Harness Connector Inspection P.
00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal No. 22) and lock switch (liftgate side) connector F-08 (terminal No. 1) and lock switch (liftgate side) connector F-08 (terminal No. 2) and ground in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the lock switch
(liftgate) works normally.
STEP 4. Lock switch (liftgate side) check
(1) Remove the liftgate lock release handle (Refer to GROUP
42Ac, Liftgate Handle and Latch P.42Ac-10).
(2) Check continuity when the lock switch (liftgate side) is operated to "ON" or "OFF" position.
Switch position
Terminal number
Normal value
ON 1 - 2
OFF 1 - 2
Continuity exists (2 Ω or less)
Open circuit
Q:Is the lock switch (liftgate side) normal?
YES: Go to Step 5.
NO: Replace the liftgate lock release handle. Check that the lock switch (liftgate) works normally.
ON
OFF
ZC6001180000
STEP 5. KOS communication test
Using scan tool (M.U.T-III), perform the antenna communication test to check that the exterior transmitter antenna (liftgate side)
is normal (Refer to P.42B-169).
Q:Is the check result normal?
YES: Go to Step 6.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240C (Refer to P.42B-18).
STEP 6. Check of the troubles
Operate the lock switch (liftgate side) to check that the door can be locked.
Q:Is the check result normal?
42B-140
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
YES: Intermittent malfunction is suspected. (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
INSPECTION PROCEDURE 12: Liftgate Lock Release Handle does not Work.
M14209100114USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
Liftgate Lock Release Handle Circuit
LIFTGATE
LOCK RELEASE
HANDLE
ETACS-ECU KOS-ECU
ZC603133 0000
Connector: C-32
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Connector: F-09
42B-141
Connector: C-102
ZC600875 0027 ZC600882 0003
PROBABLE CAUSES
⦆ Malfunction of the exterior transmitter antenna assembly (liftgate)
⦆ Malfunction of the liftgate lock release handle
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
ZC600875 0028
Connector: D-12
ZC600880 0006
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
42B-142
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check KOS-ECU connector C-102 and liftgate lock release handle connector F-09 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and liftgate lock release handle connector F-09 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the liftgate lock release handle works normally.
STEP 3. Check the wiring harness between KOS-ECU connector C-102 (terminal No. 28) and liftgate lock release handle connector F-09 (terminal No. 1) and lock switch
(liftgate side) connector F-08 (terminal No. 2) and ground.
NOTE: Also check intermediate connector C-32 and D-12 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-32 and
D-12 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection P.
00E-2.
Q:Are the wiring harness between KOS-ECU connector
C-102 (terminal No. 28) and liftgate lock release handle connector F-09 (terminal No. 1) and lock switch (liftgate side) connector F-08 (terminal No. 2) and ground in good condition?
YES: Go to Step 4.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or
Liftgate lock release handle
Section A – A
A
A
Lock switch
Lock switch
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-143 terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the liftgate lock release handle works normally.
STEP 4. Liftgate lock release handle check
(1) Remove the liftgate lock release handle (Refer to GROUP
42Ac, Liftgate Handle and Latch P.42Ac-10).
(2) Check continuity when the liftgate lock release handle is operated to "ON" or "OFF" position.
Switch position
Terminal number
Normal value
ON 1 - 2 Continuity exists (2 Ω or less)
OFF 1 - 2 Open circuit
Q:Is the liftgate lock release handle normal?
YES: Go to Step 5.
NO: Replace the liftgate lock release handle. Check that the liftgate lock release handle works normally.
ON
OFF
ZC6001180000
STEP 5. KOS communication test
Using scan tool (M.U.T-III), perform the antenna communication test to check that the exterior transmitter antenna (liftgate side)
is normal (Refer to P.42B-169).
Q:Is the check result normal?
YES: Go to Step 6.
NO: Perform troubleshooting for the diagnostic trouble
code No. B240C (Refer to P.42B-18).
STEP 6. Check of the troubles
Operate the liftgate lock release handle to check that the door can be locked.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected. (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
42B-144
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
INSPECTION PROCEDURE 13: KEYLESS ENTRY SYSTEM DOES NOT WORK.
M14209100079USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
KOS-ECU System Circuit
FUSIBLE
LINK 36
RELAY
BOX
42B-145
ETACS-ECU
PUSH
SWITCH
WHEN
REMOVING
KEY: ON
KEY
REMINDER
SWITCH
KOS-ECU
KEYLESS
OPERATION
KEY
RED- WHITE
ENCRYPTED CODE
TRANSPONDER
KEYLESS
ENTRY
RECEIVER
RECEIVER ANTENNA MODULE
ZC603134 0000
42B-146
Connectors: C-30, C-102
Connector: C-211
C-30
C-102
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC600875 0029
OPERATION
The receiver antenna module receives lock and unlock signals from the keyless operation key, and sends them to KOS-ECU, and further to ETACS-ECU.
Also, when ETACS receives signals from the key reminder switch and all the door switches, ETACS-
ECU judges them to activate the keyless entry system.
PROBABLE CAUSES
⦆ Malfunction of CAN bus line
⦆ Malfunction of the door switches
⦆ Malfunction of the key reminder switch
⦆ Malfunction of the receiver antenna module
⦆ Malfunction of the keyless operation key
⦆ Damaged wiring harness and connectors
⦆ Malfunction of the KOS-ECU
⦆ Malfunction of ETACS-ECU
ZC6008770002
Connectors: C-307, C-315, 317
C-317
C-315
C-307 (B)
ZC600878 0021
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: V.C.I.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-147
STEP 1. Using scan tool MB991958, read CAN bus the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Repair the CAN bus line (Refer to GROUP 54D, CAN bus diagnostics table P.54D-17).
NO: Go to Step 2.
Data link connector
MB991910
MB991827
MB991824
ZC5019680000
ZC501967
AC404789
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 3.
MB991827
ZC5019680000
STEP 3. Key reminder switch check
(1) Disconnect the C-315 ETACS-ECU connector.
(2) Measure the resistance at the harness-side connector with the ignition key removed from the ignition key cylinder.
42B-148
Connector C-315
(harness side)
Data link connector
MB991910
MB991824
MB991827
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
ZC5007880051
(3) Check for continuity between the C-315 ETACS-ECU connector terminal No. 13 and the ground.
OK: Continuity exists (2 Ω or less)
Q:Is the check result normal?
YES: Go to Step 4.
NO: Check the C-211 key reminder switch connector, the
C-315 ETACS-ECU connector, the wiring harness between the
C-211 key reminder switch connector (terminal No. 3) and the C-315 ETACS-ECU connector (terminal No. 13), and between the C-211 key reminder switch connector (terminal
No. 2) and the ground. If they are normal, replace the key reminder switch.
STEP 4. Using scan tool MB991958, check data list.
Check the signals related to the keyless entry system operation.
ZC501967
AC404789
ZC5019680000
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42B-10."
(2) Turn the ignition switch to the "ON" position.
(3) Check the ETACS data list.
⦆ Turn the ignition switch to the LOCK (OFF) position.
⦆ Close the driver's door.
⦆ Close the passenger's door.
⦆ Close the RH-side rear door.
⦆ Close the LH-side rear door.
⦆ Close the liftgate.
⦆ Remove the ignition key from the ignition key cylinder.
Item No.
Item name Normal condition
Item 254 IG voltage Battery voltage
Item 256
Item 257
Item 258
Dr door ajar switch
As door ajar switch
Close
Close
RR door ajar switch Close
Item 259
Item 260
Item 264
RL door ajar switch
Trunk/gate trunk ajar switch
Close
Close
Handle lock switch Key in → Key out
(4) Turn the ignition switch to the "LOCK" (OFF) position.
OK: Normal condition is displayed.
Q:Is the check result normal?
YES (Normal conditions are displayed for all the items.):
Go to Step 5.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-149
NO (Normal condition is not displayed for item No.
254.): Refer to GROUP 54Ad, Inspection Procedure 2: ETACS-
ECU does not receive any signal from the ignition switch
(IG1) P.54Ad-62.
NO (Normal condition is not displayed for item No.
256.): Refer to GROUP 54Ad, Inspection Procedure 5: ETACS-
ECU does not receive any signal from the front door switch
(LH) P.54Ad-73.
NO (Normal condition is not displayed for item No.
257.): Refer to GROUP 54Ad, Inspection Procedure 6: ETACS-
ECU does not receive any signal from the front door switch
(RH) P.54Ad-75.
NO (Normal condition is not displayed for item No.
258.): Refer to GROUP 54Ad, Inspection Procedure 8: ETACS-
ECU does not receive any signal from the rear door switch
(RH) P.54Ad-80.
NO (Normal condition is not displayed for item No.
259.): Refer to GROUP 54Ad, Inspection Procedure 7: ETACS-
ECU does not receive any signal from the rear door switch
(LH) P.54Ad-77.
NO (Normal condition is not displayed for item No.
260.): Refer to GROUP 54Ad, Inspection Procedure 9: ETACS-
ECU does not receive any signal from the liftgate switch P.54Ad-82.
NO (Normal condition is not displayed for item No.
264.): Refer to GROUP 54Ad, Inspection Procedure 3: ETACS-
ECU does not receive any signal from the key reminder switch. P.54Ad-64.
STEP 5. Check KOS-ECU connector C-102 and receiver antenna module connector C-30 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and receiver antenna module connector C-30 in good condition?
YES: Go to Step 6.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the driver’s door unlock sensor works normally.
STEP 6. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 7, 9, 10 and 32) and receiver antenna module connector C-30 (terminal Nos. 12, 3, 4 and
8).
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 7, 9, 10 and 32) and receiver antenna module connector C-30 (terminal Nos. 12, 3, 4 and 8) in good condition?
YES: Go to Step 7.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring
42B-150
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS harness as necessary. Check that the driver’s door unlock sensor works normally.
STEP 7. Check with another registered keyless operation key.
Check that the keyless entry function can be used with another keyless operation key.
Q:Can the keyless entry function be used?
YES: Replace the keyless operation key concerned and
register the ID codes (Refer to P.42B-163).
NO: Go to Step 8.
STEP 8. Check of the troubles
Replace ETACS-ECU. After the replacement, perform the coding, and check that the keyless entry system operates normally.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent Malfunction P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
INSPECTION PROCEDURE 14: KOS Timer Lock Function does not Work.
M14209100086USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
OPERATION
After the door is unlocked with the keyless entry function, if no operation is performed, the door is locked when the time specified by a customization function has elapsed. However, an open signal from any door, key reminder switch OFF (with the key inserted) signal, or ignition push switch ON signal has been input to ETACS, the KOS timer will not operate.
PROBABLE CAUSES
⦆ Malfunction of ETACS-ECU
⦆ Malfunction of the door switches
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: V.C.I.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-151
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Retest the system.
Check that the KOS timer lock function operates.
Q:Is the check result normal?
YES: Intermittent malfunction (Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction P.00-15).
NO: Perform troubleshooting for each door switch (Refer to GROUP 54Ad, P.54Ad-60Input signal chart ).
INSPECTION PROCEDURE 15: The Dome Light, The Turn-signal Lights and The Horn do not Operate through The Answerback Function.
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
M14209100080USA0000010000
PROBABLE CAUSES
⦆ Function setting error or no setting with a customization
⦆ Malfunction of the turn signal light
⦆ Malfunction of the dome light
⦆ Malfunction of the horn
⦆ Malfunction of ETACS-ECU
OPERATION
When the keyless entry function is used, the keyless entry hazard answerback function, dome light or horn answerback function operate as set by ETACS customization function. (If the flashing count is set to
0 with a customization function, no answerback function is performed.)
42B-152
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
DIAGNOSTIC PROCEDURE
Required Special Tools:
⦆ MB991223: Harness Set
⦆ MB992006: Extra Fine Probe
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: V.C.I.
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
STEP 1. Verify the hazard warning lights.
Check that the hazard warning lights illuminate normally.
Q:Is the check result normal?
YES: Go to Step 2.
NO: Refer to GROUP 54Ac, Inspection Procedure 1: The
Hazard Warning lights does not Illuminate P.54Ac-163.
STEP 2. Verify the dome light.
Check that the dome light illuminate normally.
Q:Is the check result normal?
YES: Go to Step 3.
NO: Refer to GROUP 54Ac, Trouble Symptom Chart P.
54Ac-140.
STEP 3. Verify the horn.
Check that the horn normally.
Q:Is the check result normal?
YES: Go to Step 4.
NO: Replace the horn (Refer to GROUP 54Af, Horn P.
54Af-28).
STEP 4. Check the customize function.
Check that any one of the followings other than "Lock: 0, Unlock:
0" is set for "Hazard answerback" with a customization function.
⦆ Lock:1, Unlock:2
⦆ Lock:1, Unlock:0
⦆ Lock:0, Unlock:2
⦆ Lock:2, Unlock:1
⦆ Lock:2, Unlock:0
⦆ Lock:0, Unlock:1
Q:Is the check result normal?
YES: Go to Step 5.
NO: Set "Hazard answerback" to any one other than "Lock:
0, Unlock: 0" with a customization function (Refer to P.
STEP 5. Check the customize function.
Check that any one of the followings other than "Not sound horn" is set for "Horn chirp by RKE" with a customization function.
⦆ Lock any time
⦆ W lock any time
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-153
Q:Is the check result normal?
YES: Go to Step 6.
NO: Set "Horn chirp by RKE" to any one other than "Not sound horn" with a customization function (Refer to P.
42C-91).
STEP 6. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 7.
MB991827
ZC5019680000
STEP 7. Check of the troubles
Check if the keyless entry hazard answerback, doom light answerback and horn answerback function works normally.
Q:Is the check result normal?
YES: Intermittent malfunction (Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction P.00-15.)
NO: Replace ETACS-ECU.
INSPECTION PROCEDURE 16: Outer Tone alarm does not Sound.
M14209100069USA0000010000
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
42B-154
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Outer Tone Alarm Circuit
OUTER
TONE ALARM
Connectors: C-32, C-102
C-32
Connectors: F-13, F-17
C-102
ZC600875 0030
F-17
F-13 (GR)
ZC6008820004
WHITE -B
WHITE -B
WHITE -B
KOS-ECU
ZC603135 0000
OPERATION
The outer tone alarm sounds under the following conditions.
⦆ When the door is locked or unlocked with the keyless or keyless operation function
⦆ Door lock does not operate.
⦆ The keyless operation key is brought out of the vehicle.
⦆ Also, with a customization function, "Tone alarm answerback" may be set to "Not Sound Tone alarm."
PROBABLE CAUSES
⦆ Malfunction of the antenna and outer tone alarm assembly
⦆ Malfunction of the KOS-ECU
⦆ Malfunction of the connector
⦆ Function setting error or no setting with a customization
DIAGNOSTIC PROCEDURE
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-155
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES:
Diagnose the KOS-ECU. Refer to P.42B-18.
NO: Go to Step 2.
MB991827
ZC5019680000
STEP 2. Check the customize function.
Check that either of the followings other than "Not sound tone alarm" is set for "Tone alarm answer back" with the customization function.
⦆ At keyless key
⦆ At keyless
⦆ At Both
Q:Is the check result normal?
YES: Go to Step 3.
NO: Set either of the followings other than "Not sound tone alarm" for "Tone alarm answer back" with the
customization function (Refer to P.42B-170).
42B-156
Data link connector
MB991910
MB991824
ZC501967
AC404789
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
STEP 3. Using scan tool MB991958, read the actuator test.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect scan
(2) Turn the ignition switch to the "ON" position.
(3)
Check that the outer tone alarm sounds (Refer to P.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the DTC set?
YES: Go to Step 7.
NO: Go to Step 4.
MB991827
ZC5019680000
STEP 4. Check KOS-ECU connector C-102 and outer tone alarm connector F-13 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q:Are KOS-ECU connector C-102 and outer tone alarm connector F-13 in good condition?
YES: Go to Step 5.
NO: Repair or replace the damaged component(s). Refer to
GROUP 00E, Harness Connector Inspection P.00E-2. Check that the outer tone alarm works normally.
STEP 5. Check the wiring harness between KOS-ECU connector C-102 (terminal Nos. 35 and 37) and outer tone alarm connector F-13 (terminal Nos. 1 and 2).
NOTE: Also check intermediate connector C-32 and F-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-32 and
F-17 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection P.
00E-2.
Q:Is the wiring harness between KOS-ECU connector C-102
(terminal Nos. 35 and 37) and outer tone alarm connector
F-13 (terminal Nos. 1 and 2) in good condition?
YES: Go to Step 6.
NO: The wiring harness may be damaged or the connector
(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the outer tone alarm works normally.
STEP 6. Outer tone alarm check
(1)
Remove the outer tone alarm (Refer to P.42B-176).
1 2
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
42B-157
(2) Check that the outer tone alarm sounds once when the terminals are connected to the battery as shown.
Q:Is the outer tone alarm normal?
YES: Go to Step 7.
NO: Replace the outer tone alarm. Check that the outer tone alarm works normally.
ZC600351 0000
STEP 7. Check of the troubles
Check that the outer tone alarm sounds when the outer tone alarm sounding conditions are met.
Q:Is the check result normal?
YES: Intermittent malfunction is suspected. (Refer to
GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to cope with intermittent malfunctions P.
00-15).
NO: Replace KOS-ECU and register the ID codes (Refer
DATA LIST REFERENCE TABLE
Item No.
01*
02
03
04
05
06
07
08
13
Check items
Received key data(ID) -
Check conditions
M14209100050USA0000010000
Normal conditions
Received key data
(button)
-
Front door SW(RH) lock Driver's door lock switch: ON
Driver's door lock switch: OFF
Front door SW(RH) unlock
Driver's door unlock switch: ON
Driver's door unlock switch: OFF
ON
OFF
Front door SW(LH) lock Front passenger's door lock switch: ON ON
Front passenger's door lock switch: OFF OFF
Front door SW(LH) unlock
ON
Tail gate SW lock
Front passenger's door unlock switch:
ON
Front passenger's door unlock switch:
OFF
Liftgate lock switch: ON
Liftgate lock switch: OFF
Memorised operation key ID
keyless
Switch display of the keyless operation key
ON
OFF
OFF
ON
OFF
Tail gate SW unlock
Number of registered
IMMOB.key
-
Liftgate unlock switch: ON
Liftgate unlock switch: OFF
ON
OFF
Number emergency memorised
of the
keys
42B-158
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
32
33
34
35
36
21
22
23
24
25
31
Item No.
14
37
38
39
40
41
Check items
Memorized KOS keys -
Check conditions
-
Normal conditions
Number of the keyless operation keys memorised
Air pressure, Tire 1
Air pressure, Tire 2
Air pressure, Tire 3
Air pressure, Tire 4
Air pressure, Tire 5
Acceleration, Tire 1
Acceleration, Tire 2
Acceleration, Tire 3
Acceleration, Tire 4
Acceleration, Tire 5
Threshold of PRS.
warning
-
-
-
Threshold of warning release
PRS.
-
The tire pressure is within the specified value range.
The tire pressure is not within the specified value range.
The tire pressure is within the specified value range.
The tire pressure is not within the specified value range.
OFF
ON
ON
OFF
Number of registered
TPMS ID
Ignition signal(CAN data)
Ignition input)
VSS
signal(Port
Ignition switch status information received from ETACS-ECU via CAN:ON
Ignition switch status information received from ETACS-ECU via
CAN:OFF
Ignition switch: ON
Ignition switch: OFF
Drive the vehicle
Number of stored TPMS
ON
OFF
ON
OFF
The scan tool and the tachometer readings are approximately the same
NOTE: *shows that it is displayed but not used.
ACTUATOR TEST TABLE
M14209100051USA0000010000
Item No.
01
Check items
Outer tone alarm
Driven component
Forces to sound the outer tone alarm.
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
TERMINAL VOLTAGE REFERENCE CHART
KOS-ECU TERMINAL CHECK
C-102
42B-159
M14209100068USA0000010000
ZC603897 0000
5
6
3
4
1
2
Termin al number
7
8
9
10
11
12
13
14
15
16
Check items
CAN H
CAN L
Check conditions Normal conditions
-
Steering handle unit signal output When the ignition switch is operated 0 to 5 V (pulse signal)
Steering handle unit power supply Always
Interior transmitter antenna assembly (front and rear) and exterior transmitter antenna assembly (driver's side, front passenger's side, and liftgate) ground
Always
Receiver antenna module power supply
Push switch inside the steering handle lock
Receiver antenna module (door entry) signal output
Receiver antenna module (door entry) RSSI output
Receiver antenna
(immobilizer) signal output
module
Receiver antenna
(immobilizer) CLOCK output
module
Receiver antenna module (door entry) power control
Ground
Interior transmitter antenna assembly (rear: passenger's side) signal output
Interior transmitter antenna assembly (front) signal output
-
-
Always
Push switch inside the steering handle lock: ON
-
Keyless operation key lock switch and unlock switch: ON
When communicating with the emergency key (ignition switch: ON)
When communicating with the emergency key (ignition switch: ON)
Always
Always
When the keyless operation key is located near the rear seat and third seat in the passenger compartment
When the keyless operation key is located near the front seats in the passenger compartment
-
-
-
5 V
0 V
5 V
12 V
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 V
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
42B-160
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Termin al number
17
18
19
Check items
Exterior
Exterior
transmitter signal output
transmitter
antenna assembly (driver's side) signal output
Exterior transmitter antenna assembly (front passenger's side)
antenna assembly (liftgate) signal output
Check conditions
When the keyless operation key is located near the driver's door outside the vehicle
When the keyless operation key is located near the front passenger's door outside the vehicle
When the keyless operation key is located near the liftgate outside the vehicle
21
22
23
20
24
25
Interior transmitter antenna assembly (rear: driver's side) signal output
When the keyless operation key is located near the rear seat and third seat in the passenger compartment
Lock switch (driver's side) output Lock switch: ON
Lock switch (liftgate) output Lock switch: ON
Lock switch: ON Lock switch (front passenger's side) output
Unlock sensor (driver's side) signal output
Unlock sensor (front passenger's side) signal output
When the front door outside handle
(driver's side) is grasped
When the front door outside handle
(front passenger's side) is grasped
26, 27 -
28
-
Liftgate lock release handle output When the liftgate lock release handle is operated
37
38
39
29, 30 -
31 Steering handle unit ground
32
33 -
Receiver antenna module ground
-
-
Always
Always
34
35
36
Push switch inside the steering handle lock power supply
Output to outer tone alarm (-)
Unlock sensor (driver's and front passenger's side) power supply
Output to outer tone alarm (+)
Push switch inside the steering handle lock: ON
Outer tone alarm is sounding
Always
Outer tone alarm is sounding
Always
Ignition switch: ON
40
Battery power supply
Power supply from ignition switch
(IG1)
Interior transmitter antenna assembly (front and rear) and exterior transmitter antenna assembly (driver's side, front passenger's side, and liftgate) power supply
Always
Normal conditions
0 to 8 V (pulse signal)
0 to 8 V (pulse signal)
0 to 8 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
0 to 5 V (pulse signal)
-
0 to 5 V (pulse signal)
-
0 V
-
0 V
12V
0 to 12 V (pulse signal)
10 V
0 to 12 V (pulse signal)
Battery voltage
Battery voltage
⦆ 8 V (When transmitting to the exterior transmitter antenna)
Termin al number
Check items
KEYLESS OPERATION SYSTEM (KOS)
DIAGNOSIS
Check conditions
42B-161
Normal conditions
⦆ 5 V (When transmitting to the interior transmitter antenna)
42B-162
Tool a b c d e f g
KEYLESS OPERATION SYSTEM (KOS)
SPECIAL TOOLS
MB991824
MB991827
MB991910
Do not use
MB991911
Do not use
MB991914
MB991825
SPECIAL TOOLS
M14209100043USA0000010000
Tool number and name
MB991958 a.
MB991824 b.
c.
MB991827
MB991910 d.
e.
f.
g.
MB991911
MB991914
MB991825
MB991826
M.U.T.-III assembly a.
sub
Vehicle communication b.
c.
interface (V.C.I.)
M.U.T.-III USB cable
M.U.T.-III main d.
e.
f.
g.
harness A
(Vehicles with
CAN communication system)
M.U.T.-III main harness B
(Vehicles without
CAN communication system)
M.U.T.-III main harness C (for
Daimler Chrysler models only)
M.U.T.-III measurement adapter
M.U.T.-III trigger harness
Supersession
MB991824-KIT
NOTE: G: MB991826
M.U.T.-III Trigger
Harness is not necessary when pushing V.C.I. ENTER key.
Application
M.U.T.-III main harness A
(MB991910) should be used.
M.U.T.-III main harness B and C should not be used for this vehicle.
⦆ Diagnostic trouble code, service data, actuator test check
⦆ Registration of ID codes
MB991826
YB9919580000
Tool a b c
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
42B-163
Tool number and name
MB991223 a.
b.
MB991219
MB991220 c.
d.
MB991221
MB991222
Harness set a.
Test harness b.
c.
d.
LED harness
LED harness adaptor
Probe
Supersession Application
General service tools Continuity check and voltage measurement at harness wire or connector for loose, corroded or damaged terminals, or terminals pushed back in the connector.
a.
Connector pin contact pressure inspection b.
c.
d.
Power circuit inspection
Power circuit inspection
Commercial tester connection d
Do not use
YB9912230000
MB992006
Extra fine probe
Making voltage and resistance measurement troubleshooting
during
MB992006
ON-VEHICLE SERVICE
ID CODES REGISTRATION PROCEDURE
By operating the M.U.T.-III, the ID codes registration and antenna communication can be performed.
M14209100117USA0000010000 key will not be able to start the engine, too, because it has a different key groove.
If registered, starting the engine by using the conventional key becomes impossible. The new
SUPPLY UNIT LIST FOR INDIVIDUAL KEY
Emaregency key Keyless operation key
NOTE: Blank key (It is the key that comes with the door service key set and the glove box service key set. It can only be used for locking and unlocking, and it cannot start the engine.)
Blank key
ZC6044010001
ZC603741 ZC6037420000
42B-164
Service assembly
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
key
KEY SUPPLY UNIT LIST FOR OTHER THAN INDIVIDUAL KEY
Full service key set Handle lock service key set
Door service key set
Glove box service key set
ZC6045410000
ZC6045520000
NOTE:
⦆ When re-registering the key (key ID), all the keys
(key ID) registered before must be re-registered because all of them will be erased.
⦆ When the key was replaced by the full service key set or when the key was replaced by the handle lock
ZC6045390000
ZC6045500000
ZC6045510000 service key set separately, register the key (key ID) using the barcode No. attached to the key.
⦆ After the key and keyless operation key is registered, start the engine with all the keys and keyless operation keys, and check that KOS operates normally.
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
42B-165
Screen flow of M.U.T.-III
Special Function
Refer to GROUP 00,
How to Perform
VIN Writing.
ENG key code
Reg.*1*2
Key
Registration*1
Additional key registration*1
Password input
OK
Key &
KOS Key
Registration*2
Password input
OK
Key Registration
(Barcode No.)*1
OK
Key(Barcode No.) &
KOS Key Reg.*2
Password input
Key registration password
OK
Keyless ID
Reg.*1
Steering lock unit Reg.*2
Key registration
Completion and an addition?
Cancel
Key registration
OK
Completion and an addition?
Cancel
OK
Key ID input
OK
Execution check
OK
Key ID Input
OK
The completion of barcode registration
OK
Special Function
Comm.
Test*2
KOS key registration
Executing
OK
KOS key registration completed
OK
Barcode No. registration completed
OK
Special Function
KOS key registration password
OK
KOS key registration
Executing
OK
Registration result display
Password input
OK
Password input
OK
Antenna select
OK
Keyless ID registration
Executing
OK
Keyless ID registration
Completed
OK
Steering lock unit registration
Executing
Antenna communication test Executing
Steering lock unit registration
Completed
Antenna communication test Completed
NOTE:
KOS key registration completed
OK
Registration result display
*1 Show the menu displayed when the vehicles for WCM.
*2 Show the menu displayed when the vehicles for KOS.
Registration result display
ZC603754 0000
42B-166
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
Data link connector
ZC501967
AC404789
Vehicles for KOS
System Select
K OS/IMMO/ K e yless/TPM S
Special Function
Key & KOS Key Reg .
Key (Barcode No) & KOS Key Reg .
ENG Key Code Reg .
Stee ring lo ck unit Reg .
Comm . Tes t
Tire Pressure Sensor ID Che ck Tire Pressure Sensor Che ck
Tire Pressure Sensor ID Regist ratio n
MB991910
MB991824
MB991827
ZC5019680000
Connect the M.U.T.-III to the 16-pin data link connector as follows.
NOTE: For details on how to use the scan tool, refer to the "M.U.T.-III User's Manual."
1.
Start the M.U.T.-III system on the PC and turn the ignition switch to the "ON" position.
System Select
System List
1
2
3
MPI/GDI/Diesel
KOS/IMMOBI/ Keyless/TPM S
AT/CVT/A-M T
6
7
4
5
8
ABS/ASC/ASTC
SAS
Multi Select 4WD
SRS Airbag
A/C
9
10
E TA C S
Meter
Select Model Year and System
Model Yea r Up to 2005 MY
From to 2006 M Y
Vehicle In fo r matio n
Model Name
Model Yea r
Model Code
OUTLANDER
2007
OPC
Loading Option Setup
Option Name With Option
OK button ZC6037850000
2.
Select "KOS/IMMO//Keyless/TPMS" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
3.
Select "Special Function" on the next screen.
Please select function.
ZC6037860000
4.
Select the button of the operation to be performed from the "Special Function" screen.
⦆ "Key & KOS Key Reg.": When the keyless operation key or emergency key is replaced or added as a single unit, when the emergency key is replaced or added by a supply of service key assembly.
⦆ "Key(Barcode No.) & KOS Key Reg.": When the emergency key is replaced by the full service key set or the handle lock service key set is replaced by the piece.
⦆ "ENG key code Reg.": When the engine control module is replaced.
⦆ "Steering lock unit Reg.": When KOS-ECU is replaced but the steering lock assembly is not replaced.
⦆ "Comm. Test": When the KOS antenna communication status is checked.
⦆ "Tire Pressure Sensor ID Registration": When the
TPMS transmitter is replaced.
⦆ "Tire Pressure Sensor Check": When the tire pressure sensor data is checked.
⦆ "Tire Pressure Sensor ID Check": When the tire pressure sensor ID is checked.
NOTE:
⦆ For "Key Code Registration," refer to GROUP 00 -
Precautions before Service P.00-26.
⦆ For "Tire Pressure Sensor ID Registration," refer
⦆
For "Tire Pressure Sensor Check," refer to P.
⦆
For "Tire Pressure Sensor ID Check," refer to P.
"KEY & KOS KEY REG." METHOD
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
42B-167
OK button
ZC6038410000
1.
When "Key & KOS Key Registration" screen is displayed, enter the password for the key registration and press the OK button. Then,
"Executing!" is displayed and the key registration process starts.
NOTE:
⦆ If the wrong password is entered consecutively 5 times, the password entry for the key registration will be disabled for 16 minutes.
⦆ The key registration cannot be cancelled during the operation.
operation key registration, press the cancel button.
Then "Press OK button to start KOS key registration" is displayed.
NOTE:
⦆ In order to register another key consecutively after registering the first key, the ignition switch must be turned to the ON position with the second key within 30 seconds after turning it to the
"LOCK" (OFF) position with the first key.
⦆ Up to eight keys can be registered.
3.
Press the lock switch of the keyless operation key to be registered twice within 1 minute to allow the keyless operation key to be registered. Complete the registration within 1 minute and press the OK button. Then the keyless operation key registration ends.
NOTE:
⦆ Up to 4 keyless operation keys can be registered.
⦆ Register keyless operation keys inside the vehicle.
⦆ Register the keyless operation keys with the key released from M.U.T.-III display.
Cancel button
ZC6038420000
ZC603844 0000
4.
Push the OK button after "KOS key Registration was finished." is displayed.
ZC6038430000
2.
When the key registration is completed,
"Completed." is displayed. To continue the key registration, press the OK button according to the screen instructions. Then "Executing!" is displayed again and the next registration process starts. To finish the key registration and start the keyless
ZC6038450000
5.
Check the number of the registered keys and keyless operation keys.
42B-168
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
"KEY(BARCODE NO.) & KOS KEY REG." METHOD
Special Function Ke y (Ba r code No.) & K OS Ke y Reg .
Key (Barcode No.) & KOS Key Reg.
Item Registered No.
Status
Key Registration (Barcode No.)
In
Operation
KOS Key Registration
Not
Operation 7 8
4 5
Password
OK button
Execute the Key Registration (Barcode No.).
Input the Password for ''Immobilizer Key Reg.'' and press OK button.
1
0
2
9
6
3
Ba ck
Space
Clear
Key Cord Registration --Web Page Dialog
Key Registration (Barcode No.)
Key Registration was completed.
Follow up with KOS key Registration.
ZC6045530000
1.
When "Key(Barcode No.) & KOS key Registration" screen is displayed, enter the password for the key registration and press the OK button.
NOTE: If the wrong password is entered consecutively 5 times, the password entry for the key registration will be disabled for 16 minutes.
Special Function Ke y(Ba r code No.) & K OS Ke y Reg .
Ke y
Key (Barcode No.) & KOS Key Reg.
Item Registered No.
Status
Registration
(Ba r code No.
)
In
Operation
KOS Key Registration
Not
Operation
Ke y ID 1
0123ABCD
Ke y ID 2
0123ABCD
Ke y ID 3(OP )
0123ABCD
ZC604554 0000
3.
"Key Registration was completed. Follow up with
KOS key Registration. " is displayed, press the OK button and go to the keyless operation key registration.
Special Function Ke y (Ba r code No.) & K OS Ke y Reg .
Key (Barcode No.) & KOS Key Registration
Item Registered No.
Status
Ke y
Registration
(Ba r code No.
) 4
Completed
KOS Key Registration
In
Operation 7 8
Password
4
1
5
2
Execute the Key Registration.
Input the Password for ''KOS Key Reg.'' and press OK button.
Finish registration within 1min.
, after sta r ting .
0
9
6
3
Ba ck
Space
Clear
1
A
2
B
3
C
4
D
5
E
6
F
7 8 9 0
Input k e y I D , and press the OK b utton . Required fields are indicated in shaded red b o x .
Ta b
Ba ck
Space
Clear
ZC604555 0000
4.
Enter the password for keyless operation key registration and press the OK button. Then the keyless operation key registration starts.
ZC6045570000
Barcode
Special Function Ke y (Ba r code No.) & K OS Ke y Reg .
Key (Barcode No.) & KOS Key Reg.
Item Registered No.
Status
Ke y
Registration
(Ba r code No.
) 4
Completed
KOS Key Registration 2
In
Operation 7 8
4 5
Password
1 2
Operate the KOS key switch.
Finish registration within 1min, and press OK button.
0
9
6
3
Ba ck
Space
Clear
ZC6038480000
2.
Follow the message on the screen and enter the
Barcode No. Then, press the OK button.
ZC6045560000
5.
Press the lock switch of the keyless operation key to be registered twice within 1 minute to allow the keyless operation key to be registered. Complete the registration within 1 minute and press the OK button. Then the keyless operation key registration ends.
NOTE:
⦆ Up to 4 keyless operation keys can be registered.
⦆ Register keyless operation keys inside the vehicle.
⦆ Register the keyless operation keys with the key released from M.U.T.-III display.
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
6.
Push the OK button after "KOS key Registration was finished." is displayed.
"STEERING LOCK UNIT REG." METHOD
7.
42B-169
Check the number of the registered keys and keyless operation keys.
1.
Enter the password on "Steering Lock Unit
Registration" screen and press the OK button to register the KOS ID.
2.
Push the OK button after "Completed." is displayed.
OK button
"COMM. TEST" METHOD
ZC6037550000
1.
Select the antenna to be tested on "Communication
Test" screen, and press the OK button with the keyless operation key placed within the communication operational area.
2.
Push the OK button after "Communication is normal." is displayed.
OK button
ZC6037560000
ANTENNA COMMUNICATION TEST
M14209100064USA0000010000
Refer to Procedure to register each ID code P.42B-163.
KEYLESS ENTRY SYSTEM CHECK
M14209100118USA0000010000
Check the keyless entry system function as described below. If
it does not work, perform troubleshooting. Refer to P.42B-108.
⦆ Operate the keyless operation key to check that the doors and liftgate can be locked and unlocked.
⦆ Operate the keyless operation key to check that the answerback function works in response to door and liftgate locking/unlocking.
NOTE: The hazard and horn answerback setting can be changed using the customization function. Confirm which setting is activated before performing these checks.
42B-170
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
INSPECTION OF KEYLESS ENTRY TIMER LOCK
FUNCTION
M14209100122USA0000010000
Attempt to unlock the doors and the liftgate by using the keyless operation key. If the doors and the liftgate are not locked within
30 seconds, carry out troubleshooting. Note that the doors and the liftgate will not be locked if the ignition key is inserted within the 30-second period, one of the doors or the liftgate is opened.
NOTE: The operation time of the keyless entry timer lock function can be set using the customization function.
Confirm the operation time before performing the diagnosis.
CONFIGURATION FUNCTION
By using ETACS functions, KOS functions can be adjusted.
⦆ Horn answerback function of the keyless entry system
A function that sounds the horn when the doors are locked/unlocked by the keyless operation key to let the driver confirm that the doors are locked/ unlocked even when he/she is away from the car
⦆ KOS auto lock function
A function that automatically locks the doors when the driver left the car without locking the doors
⦆ In-car keyless operation key search
Adjustment item (scan tool
MB991958 display)
Adjustment item Adjusting contents
(scan tool MB991958 display)
M14209100116USA0000010000
A function that monitors the keyless operation key being brought out of the car through the car window
⦆ KOS outer tone alarm answerback function
A function that sounds the outer tone alarm when the doors are locked/unlocked by the keyless operation key to enable the driver confirm that the doors are locked/unlocked
⦆ All KOS functions
Enables/disables all KOS functions or enables either door entry function or engine starting function respectively.
Adjusting contents
Hazard answer back
Adjustment of the number of keyless hazard warning light answer flashes
back
Lock:1, Unlock:2
Lock:1, Unlock:0
Lock:0, Unlock:2
LOCK: Flashes once, UNLOCK: Flashes twice (default)
LOCK: Flashes once, UNLOCK: No flash
LOCK: No flash, UNLOCK: Flash twice
Lock:2, Unlock:1
Lock:2, Unlock:0
LOCK: Flash twice, UNLOCK: Flash once
LOCK: Flash twice, UNLOCK: No flash
Lock:0, Unlock:1
Lock:0, Unlock:0
LOCK: No flash, UNLOCK: Flash once
Without function
Dome light delay timer with door
Adjustment of interior light delay shutdown time
0sec
7.5sec
15sec
30sec
60sec
120sec
0 second (no delay shutdown time)
7.5 seconds
15 seconds
30 seconds (default)
60 seconds
120 seconds
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
42B-171
Adjustment item (scan tool
MB991958 display)
Adjustment item Adjusting contents
(scan tool MB991958 display)
Adjusting contents
Door mode
unlock Door lock system
180sec
All doors unlock
Dr door unlock
180 seconds
All the doors are unlocked when the driver's side door is unlocked.
Only the driver's side door is unlocked when the driver's side door is unlocked. (default)
Without function (default)
Always with function
Auto door unlock by P position
Auto door unlock by
P position function
Disable
Always enabled
P/W unlocked
Duration of horn chirp
Horn chirp by
RKE
Tone alarm answer back
Horn sounding time during horn answer back
Horn chirp by RKE
Adjusts the tone alarm answer back function.
Timer lock timer Timer lock period adjustment
Short
Long
Not sound horn
Lock any time
With function (with power window unlocked)
0.01 second (default)
0.02 second
No horn answerback function
The horn sounds when the lock button of keyless entry transmitter is pressed once.
W lock any time The horn sounds when the lock button of keyless entry transmitter is pressed twice.
(default)
Not sound tone alarm Without function
At keyless key Sounds when the keyless entry system is activated.
At keyless
At Both
Sounds when KOS is activated (default).
Sounds when the keyless entry system or
KOS is activated.
30sec
60sec
120sec
30 seconds (default)
60 seconds
120 seconds
Duration alarm
Alarm
Panic switch
pre-
alarm
Fob out of car
KOS feature
Adjustment of prealarm continue time
With/without theftalarm function
With/without panic alarm function
With/without KOS key detection function
KOS adjustment
exterior
function
180sec
10 sec
6 sec
Disable
Enable
Disable
Enable
Disable
Enable
Both enable
DoorEntry enable
180 seconds
10 seconds (default)
6 seconds
Without function
With function (default)
Without function
With function (default)
Without function (default)
With function
All KOS functions are enabled (default).
Only door entry function is enabled.
42B-172
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
Adjustment item (scan tool
MB991958 display)
Adjustment item Adjusting
(scan tool MB991958 display)
contents
KOS unlock disable time
Adjusts the door unlock inhibition period after door lock is activated.
ENG strt enable
Both disabled
0sec
3sec
5sec
Adjusting contents
Only engine starting function is enabled.
All KOS functions are disabled.
0 seconds
3 seconds (default)
5 seconds
TIRE PRESSURE SENSOR ID REGISTRATION
M14209100160USA0000010000
When the TPMS transmitter and/or KOS-ECU are replaced, execute "Tire Pressure Sensor ID Registration." The TPMS won't function until the "Tire Pressure Sensor ID Registration" has been complete.
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Register the tire pressure sensor IDs as described in the procedure below.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1.
Connect scan tool MB991958 to the data link connector.
2.
Turn the ignition switch to the "ON" position.
3.
Select "Interactive Diagnosis" from the start-up screen.
4.
Select "System select."
5.
Select "Special Function."
6.
Select "Tire Pressure Sensor ID Registration."
7.
Select "4tires ID Reg. (Change tire PRS.)" and start the tire pressure sensor ID registration.
Register all tire pressure sensor IDs within twenty minutes.
8.
"4 SNSR ID Registration Do you want to start? Note Finish ID
Registration within 20 minutes." is displayed. Then, press
"OK."
9.
Decrease the tire pressure to 174 kPa or less, and register the
TPMS transmitter ID code of each wheel to KOS-ECU.
NOTE:
⦆ On completion of the TPMS transmitter ID code registration, the TPMS transmitter ID code is displayed on the M.U.T.-III screen.
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
42B-173
⦆ It may take approximately one minute for the ID code to be displayed on the M.U.T.-III screen after the tire pressure is reduced.
⦆ If the ID code is not displayed, reduce the tire pressure another 20 kPa or more. If the ID code is not displayed yet, rotate the tire to displace the TPMS transmitter, and reduce the tire pressure 20 kPa or more again.
⦆ You can start out the following operations from any TPMS transmitter. The tire pressure sensor ID registration has no order.
10.
"4 SNSR ID Registration Completed." is displayed. Then, select "OK."
NOTE: The TPMS indicator illuminates for tire pressure alarm.
11.
After tire pressure sensor ID registration, turn the ignition switch to the "LOCK" (OFF) position.
12.
Remove scan tool MB991958.
TIRE PRESSURE SENSOR CHECK
M14209100161USA0000010000
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Check the condition of the tire pressure sensor as described below.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1.
Connect scan tool MB991958 to the data link connector.
2.
Turn the ignition switch to the "ON" position.
3.
Select "Interactive Diagnosis" from the start-up screen.
4.
Select "System select."
5.
Select "Special Function."
6.
Select "Tire Pressure Sensor Check."
7.
"Tire Pressure Sensor Check. Do you want to start?" is displayed. Then, select "OK."
8.
Change the pressure of tire to be checked for 20 kPa or more.
(The tire pressure can either be decreased or increased.)
9.
Check the data on the PC display.
NOTE:
⦆ It may take approximately one minute for the ID code to be displayed on the M.U.T.-III screen after the tire pressure is changed.
42B-174
KEYLESS OPERATION SYSTEM (KOS)
ON-VEHICLE SERVICE
⦆ If the ID code is not displayed, change the tire pressure another 20 kPa or more. If the ID code is not still displayed, rotate the tire to displace the TPMS transmitter, and change the tire pressure 20 kPa or more again.
10.
After tire pressure sensor check, turn the ignition switch to the "LOCK" (OFF) position.
11.
Remove scan tool MB991958.
TIRE PRESSURE SENSOR ID CHECK
M14209100162USA0000010000
Required Special Tools:
⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆ MB991824: Vehicle Communication Interface (V.C.I.)
⦆ MB991827: M.U.T.-III USB Cable
⦆ MB991910: M.U.T.-III Main Harness A
Check the tire pressure sensor IDs, which is registered in the
TPMS receiver, as described below.
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1.
Connect scan tool MB991958 to the data link connector.
2.
Turn the ignition switch to the "ON" position.
3.
Select "Interactive Diagnosis" from the start-up screen.
4.
Select "System select."
5.
Choose "TPMS" from the "CHASSIS" tab.
6.
Select "MITSUBISHI."
7.
Select "Special Function."
8.
Select "Tire Pressure Sensor ID Check."
9.
Check the tire pressure sensor IDs on the PC display.
10.
After tire pressure sensor ID check, turn the ignition switch to the "LOCK" (OFF) position.
11.
Remove scan tool MB991958.
FROM SCAN TOOL MB99158 DIAGNOSIS SCREEN
You can check the tire pressure sensor ID on the diagnosis screen as described below.
1.
Operate scan tool MB991958 as follows:
⦆ Press "Special" button on the diagnosis screen.
⦆ Select "Tire Pressure Sensor ID Check" from the "Special
Function" menu.
2.
Check the tire pressure sensor IDs on the PC display.
3.
After tire pressure sensor ID check, turn the ignition switch to the "LOCK" (OFF) position.
4.
Remove scan tool MB991958.
KEYLESS OPERATION SYSTEM (KOS)
KOS-ECU
KOS-ECU
REMOVAL AND INSTALLATION
If KOS-ECU is replaced, refer to ID code
registration need judgment table P.42B-12to
complete the registration of each ID code.
42B-175
M14209100059USA0000010000
1
5.0 ± 1.0 N·m
44 ± 9 in-lb
·
Removal Steps
Instrument panel under trim (Refer to
GROUP 52A - Instrument Panel
Assembly P.52A-2.)
Removal Steps
>>A<< 1.
KOS-ECU
ZC601250
INSTALLATION SERVICE POINT
>>A<< KOS-ECU INSTALATION
Check that the top claw of KOS-ECU is fixed securely to the boss of steering lock and the antenna is not floating on the key cylinder.
42B-176
KEYLESS OPERATION SYSTEM (KOS)
EXTERIOR TRANSMITTER ANTENNA ASSEMBLY, INTERIOR TRANSMITTER ANTENNA ASSEMBLY, RECEIVER ANTENNA MODULE
EXTERIOR TRANSMITTER ANTENNA ASSEMBLY, INTERIOR TRANSMITTER ANTENNA ASSEMBLY,
RECEIVER ANTENNA MODULE
REMOVAL AND INSTALLATION
M14209100062USA0000010000
7
4.5 ± 0.5 N·m
40 ± 4 in-lb
1
8
3
5
6
4.5 ± 0.5 N·m
40 ± 4 in-lb
2
9
Exterior transmitter antenna assembly (front passenger's side) removal steps
· Center pillar trim <RH> (Refer to
GROUP 52A, Interior Trim P.
52A-10.)
1.
Exterior transmitter antenna assembly
(front passenger's side)
·
Exterior transmitter antenna assembly (driver's side) removal steps
Center pillar trim <LH> (Refer to
GROUP 52A, Interior Trim P.
52A-10.)
2.
Exterior transmitter antenna assembly
(driver's side)
4
ZC600225 0000
·
Antenna and tone alarm assembly removal steps
Rear bumper assembly (Refer to
GROUP 51A, Rear Bumper
Assembly P.51A-5.)
3.
Antenna and tone alarm assembly
4.
Exterior transmitter antenna assembly
(liftgate)
5.
Tone alarm
6.
Bracket
Interior transmitter antenna assembly (front) removal steps
· Rear floor console (Refer to GROUP
52A, Rear Floor Console Assembly P.
52A-9.)
7.
Interior transmitter antenna assembly
(front)
KEYLESS OPERATION SYSTEM (KOS)
EXTERIOR TRANSMITTER ANTENNA ASSEMBLY, INTERIOR TRANSMITTER ANTENNA ASSEMBLY, RECEIVER ANTENNA MODULE
·
Interior transmitter antenna assembly (rear: front passenger's side) removal steps
Quarter trim lower <RH> (Refer to
GROUP 52A, Interior Trim P.
52A-10.)
8.
Interior transmitter antenna assembly
(rear: front passenger's side)
42B-177
·
Interior transmitter antenna assembly (rear: driver's side) removal steps
Quarter trim lower <LH> (Refer to
GROUP 52A, Interior Trim P.
52A-10.)
9.
Interior transmitter antenna assembly
(rear: driver's side)
To remove the driver airbag module, refer to
GROUP 52B, Service Precautions P.52B-28and
Air Bag Module(s) and Clock Spring P.52B-329.
Pre-removal operation
⦆ Lower panel and steering column cover removal (Refer to
GROUP 52A, Instrument Panel Assembly P.52A-2.)
⦆ Clock spring column switch assembly removal (Refer to
GROUP 37, Steering Shaft P.37-23or GROUP 52B, Air Bag
Module(s) and Clock Spring P.52B-329.)
Post-installation operation
⦆ Clock spring column switch assembly installation (Refer to
GROUP 37, Steering Shaft P.37-23or GROUP 52B, Air Bag
Module(s) and Clock Spring P.52B-329.)
⦆ Lower panel and steering column cover installation (Refer to
GROUP 52A, Instrument Panel Assembly P.52A-2.)
2
1
Receiver antenna module removal steps
1.
Key ring illumination light
2.0 ± 0.5 N·m
18 ± 4 in-lb
ZC600981 AA00
Receiver antenna module removal steps
2.
Receiver antenna module
42B-178
1 2
KEYLESS OPERATION SYSTEM (KOS)
KEYLESS OPERATION KEY
INSPECTION
M14209100063USA0000010000
OUTER TONE ALARM CHECK
Check that the outer tone alarm sounds once when the terminals are connected to the battery as shown.
ZC600351 0000
KEYLESS OPERATION KEY
DISASSEMBLY AND ASSEMBLY
Post-installation operation
Operation check of the keyless operation key
4
2
1
M14209100040USA0000010000
Disassembly steps
1.
Emergency key
<<A>> 2.
Upper cover
<<A>> >>A<< 3.
Battery
3
<<A>>
Disassembly steps
4.
Lower cover
ZC600221 0000
Upper cover
KEYLESS OPERATION SYSTEM (KOS)
KEYLESS OPERATION KEY
42B-179
DISASSEMBLY SERVICE POINT
<<A>> UPPER COVER/BATTERY/LOWER COVER
REMOVAL
Place a flat-tipped screwdriver wrapped with protective tape as shown in the figure, and lever the keyless operation key to remove.
Flat-tipped screwdriver
ZC600222 0000
Lower cover
ASSEMBLY SERVICE POINT
>>A<< BATTERY INSTALLATION
Install a new battery with the positive side facing toward the lower cover.
Replacement battery: Coin-type lithium battery CR2032
– +
Battery
Upper cover
ZC600347 0000
42B-180
KEYLESS OPERATION SYSTEM (KOS)
KEYLESS OPERATION KEY
INSPECTION
M14209100041USA0000010000
KEYLESS OPERATION KEY BATTERY CHECK
Measure the voltage of the battery. If the voltage of the battery is lower than the standard value, replace the battery.
Standard value:2.5 - 3.2 V
AC004486
TPMS TRANSMITTER
REMOVAL AND INSTALLATION
⦆ Ensure valve cap is always in place except when adjusting tire pressure.
⦆ If the valve core and valve cap are replaced, use a genuine replacement part. The valve core is similar to a conventional one, but uses nickel plating to avoid corrosion.
⦆ Replace the valve stem grommet and washer with a new one every five years or when the tire is replaced.
⦆ Do not drop the TPMS transmitter from height greater than 1 meter (3.3 feet).
M14209100164USA0000010000
⦆ Do not expose the TPMS transmitter to
⦆
⦆
⦆ extraneous magnetic fields.
TPMS transmitter should not be stored at temperatures above 80°C (176°F).
TPMS transmitter should not be exposed to temperatures above 100°C (212°F).
If the TPMS transmitter is replaced, execute
"Tire Pressure Sensor ID Registration" on scan tool MB99158 "Special Function."
Pre-removal Operation
⦆ Wheel and Tire Removal
Post-installation Operation
⦆ Wheel and Tire Installation
⦆
Tire Pressure Sensor ID Registration If a new TPMS transmitter is installed (Refer to P.42B-172.)
⦆ After the tire pressure sensor ID registration, check that the TPMS warning light does not illuminate or flash.
KEYLESS OPERATION SYSTEM (KOS)
TPMS TRANSMITTER
3
5
4 N
2
8.0 ± 0.5 N·m
71 ± 4 in-lb
0.25 N·m
2.5 in-lb
1
42B-181
<<A>>
<<A>>
<<B>>
<<C>>
<<C>>
>>A<<
REMOVAL STEPS
1.
VALVE CAP
·
2.
VALVE NUT
LET TPMS TRANSMITTER
FALL INTO TIRE
· TIRE BEAD
3.
TPMS TRANSMITTER
4.
GROMMET
5.
WASHER
INSTALLATION STEPS
5.
WASHER
>>A<<
>>A<<
>>A<<
>>B<<
>>C<<
>>C<<
ZC6045420000
INSTALLATION STEPS
4.
GROMMET
3.
TPMS TRANSMITTER
2.
VALVE NUT
·
·
TIRE BEAD MOUNTING
TIRE PRESSURE INFLATION
· VALVE NUT RETIGHTENING
1.
VALVE CAP
REMOVAL SERVICE POINTS
<<A>> VALVE CAP/VALVE NUT REMOVAL
Ensure valve cap is always in place except when adjusting tire pressure.
1.
Remove the valve cap.
2.
Rotate tire so that valve stem is in the 6 o’clock position.
3.
Use a long-reach 17.2 mm (0.68 inch) socket to unscrew the valve nut and remove it. Slowly push valve stem into tire so that tire pressure is released.
4.
Once tire pressure is released, let TPMS transmitter into tire.
42B-182
KEYLESS OPERATION SYSTEM (KOS)
TPMS TRANSMITTER
<<B>> TPMS TRANSMITTER REMOVAL
1.
Place on tire changing machine and break both tire beads ensuring that the transmitter remains in the bottom of the tire.
Be careful not to damage the TPMS transmitter.
2.
Lubricate tire well and remove outer side of the tire.
3.
Reach inside the tire and remove the TPMS transmitter.
4.
Remove tire from rim using proper tire changing equipment procedures.
TPMS
Transmitter
ZC6008320000
Washer
Grommet Holes
Valve nut
TPMS transmitter
ZC6045430000
<<C>> GROMMET/WASHER REMOVAL
⦆ Do not vary the angle of valve except at mounting on the rim. If varying the angle over and over, it may cause breakage of antenna plate resulting in the failure of transmitter.
⦆ Use a soft tool to remove the grommet and washer to prevent scratching the valve of the TPMS transmitter.
Remove the grommet and washer from the TPMS transmitter.
INSTALLATION SERVICE POINTS
>>A<< GROMMET/WASHER/TPMS TRANSMITTER/VALVE
NUT INSTALLATION
When installing a new grommet and washer, make sure to support the valve stem base with a thumb so that there is no movement of the stem. Otherwise, the stem may protrude resulting in the breakage of antenna plate.
1.
Install a new grommet and washer to the TPMS transmitter.
⦆ Visually check that TPMS transmitter is not deformed or damaged.
⦆ When installing the TPMS transmitter, be sure the rim, grommet and valve nut are clean.
⦆ Ensure the grommet is located inside the valve hole before installing the valve nut.
⦆ While installing the valve nut, push the transmitter to maintain the lower lip of the transmitter case is in contact with the rim without clearance.
⦆ While installing the valve nut, ensure the tool is kept aligned to the valve and the valve hole.
⦆ After installing the valve nut, check that the grommet is compressed and washer is bend.
KEYLESS OPERATION SYSTEM (KOS)
TPMS TRANSMITTER
42B-183
2.
Mount TPMS transmitter valve through rim hole as illustrated.
Pressure holes in the transmitter case should face away from center of rim. Tighten valve nut finger tight, then slowly torque the valve nut to 8.0 ± 0.5 N·m (71 ± 4 in-lb).
Install the TPMS transmitter correctly. If the TPMS transmitter is installed incorrectly, it may not work correctly, or become damaged when the tire is installed.
3.
Check that the TPMS transmitter is correctly assembled
(Refer to illustration).
⦆ Lower lip of the TPMS transmitter case is touching the rim after torquing.
>>B<< TIRE BEAD MOUNTING
1.
Put the tire on the rim, so that the cross point of the belt with the rim is approximately 20 cm (7.9 inch) away from the valve
ZC604545 AA00
2.
Engage the shoe and make sure that 20 cm (7.9 inch) is maintained between the cross point and the valve. The arrow shows the direction of rotation of the wheel.
ZC604546AA00
3.
Turn the wheel in order to engage all the first side of the tire.
NOTE: The standard shoes can pass over the sensor without damaging it.
ZC604547AA00
42B-184
KEYLESS OPERATION SYSTEM (KOS)
TPMS TRANSMITTER
4.
Put the second side of the tire in position, so that the cross point of the belt with the rim is approximately 20 cm (7.9 inch) away from the valve. the curved arrow shows the direction of rotation of the wheel.
ZC604548AA00
5.
Turn the wheel in order to engage all of the second side of the tire.
NOTE: The standard shoes can pass over the sensor without damaging it.
ZC604549AA00
>>C<< TIRE PRESSURE INFLATION/VALVE NUT
RETIGHTENING
After tire inflation, retighten the valve nut to 8.0N·m (71 inch pounds). This is necessary, because the TPMS transmitter is secured to the wheel with the valve nut and rubber grommet. The rubber grommet will be depressed by tire pressure or deteriorate over a period of time, which requires the valve nut to be retightened.
Inflate tire to required pressure, then retorque the valve nut to
8.0 N·m (71 inch pounds).
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