NISSAN automatic transmission User manual
Below you will find brief information for automatic transmission.
advertisement
AUTOMATIC TRANSMISSION
SECTION
AT
CONTENTS
Special Service Tools ..................................................3
Supplemental Restraint System (SRS)
...............4
Precautions ..................................................................4
Service Notice or Precautions .....................................5
........................................................6
A/T Electrical Parts Location .......................................6
Wiring Diagram - A/T -.................................................7
Cross-sectional View ...................................................8
Hydraulic Control Circuits ............................................9
Shift Mechanism ........................................................10
Control System ..........................................................12
...............................................................14
Self-diagnosis ............................................................14
Diagnosis by CONSULT-II .........................................20
TROUBLE DIAGNOSIS - Introduction
........................22
Introduction ................................................................22
Diagnostic Worksheet................................................23
Work Flow..................................................................26
TROUBLE DIAGNOSIS - Basic Inspection
................27
A/T Fluid Check .........................................................27
Stall Test ....................................................................27
Line Pressure Test.....................................................30
Road Test...................................................................32
TROUBLE DIAGNOSIS - General Description
Symptom Chart..........................................................43
TCM Terminals and Reference Value........................46
TROUBLE DIAGNOSIS FOR VHCL SPEED
.........................................................................49
Wiring Diagram - AT - VSSA/T ..................................49
A/T (Revolution sensor) ........50
TROUBLE DIAGNOSIS FOR VHCL SPEED
.......................................................................52
Wiring Diagram - AT - VSSMTR................................52
MTR ......................................54
TROUBLE DIAGNOSIS FOR THROTTLE POSI
................................................................................56
Wiring Diagram - AT - TPS........................................56
Throttle (Accelerator) Position Sensor ......................60
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V
.....................................................................................62
Wiring Diagram - AT - SSV/A ....................................62
Shift Solenoid Valve A ...............................................63
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V
.....................................................................................65
Wiring Diagram - AT - SSV/B ....................................65
Shift Solenoid Valve B ...............................................66
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH
..................................................................................68
Wiring Diagram - AT - OVRCSV................................68
Overrun Clutch Solenoid Valve .................................69
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
.....71
Wiring Diagram - AT - TCV........................................71
Torque Converter Clutch Solenoid Valve ..................72
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP
................................................................................75
Wiring Diagram - AT - BA/FTS ..................................75
A/T Fluid Temperature Sensor and TCM Power
Source........................................................................76
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
....79
Wiring Diagram - AT - ENGSS ..................................79
Engine Speed Signal .................................................80
TROUBLE DIAGNOSIS FOR LINE PRESSURE
..................................................................................82
Wiring Diagram - AT - LPSV......................................82
Line Pressure Solenoid Valve ...................................84
TROUBLE DIAGNOSIS FOR NON-DETECTABLE
.............................................................................87
Wiring Diagram - AT - PNP/SW.................................87
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches ...................88
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
........94
CONTENTS
(Cont’d)
1. SPORT Indicator Lamp Does Not Come On ........94
2. SPORT or SNOW Indicator Lamp Does Not
3. O/D OFF Indicator Lamp Does Not Come On......95
4. SPORT Indicator Lamp Does Not Come On ........96
5. Engine Cannot Be Started In
Position, Vehicle Moves Forward Or
Position, Vehicle Moves .............................98
Position .........................99
9. Vehicle Does Not Creep Backward In
10. Vehicle Does Not Creep Forward In
.........................................................101
11. Vehicle Cannot Be Started From D
1
.................102
1
2
4
2
3
............................104
3
4
.............................105
15. A/T Does Not Perform Lock-up .........................106
16. A/T Does Not Hold Lock-up Condition ..............107
17. Lock-up Is Not Released...................................107
18. Engine Speed Does Not Return To Idle (Light
4
3
19. Vehicle Does Not Start From D
1
.......................109
2
1
4
3
............... 111
3
2
Position......................................... 111
2
1
Position ......................................... 112
24. Vehicle Does Not Decelerate By Engine
Brake........................................................................ 112
.............................................. 113
Control Valve Assembly and Accumulators............. 113
Revolution Sensor Replacement ............................. 114
Rear Oil Seal Replacement..................................... 114
Parking Components Inspection.............................. 114
Park/neutral Position Switch Adjustment................. 114
Manual Control Linkage Adjustment........................ 115
................................ 116
Removal................................................................... 116
Installation................................................................ 117
................................................... 119
Oil Channel ..............................................................121
............................................................123
Disassembly.............................................................123
Oil Pump ..................................................................134
Control Valve Assembly...........................................138
Control Valve Upper Body .......................................144
Control Valve Lower Body .......................................149
Reverse Clutch ........................................................151
High Clutch ..............................................................155
Forward and Overrun Clutches ...............................157
Low & Reverse Brake..............................................161
Forward Clutch Drum Assembly..............................165
Rear Internal Gear and Forward Clutch Hub ..........168
Band Servo Piston Assembly ..................................171
Parking Pawl Components ......................................175
..................................................................177
Assembly (1)............................................................177
Adjustment ...............................................................185
Assembly (2)............................................................188
...................................195
A/T Fluid Cooler.......................................................195
SERVICE DATA AND SPECIFICATIONS (SDS)
........196
General Specifications.............................................196
Specifications and Adjustment.................................196
When you read wiring diagrams:
I
Read GI section, “HOW TO READ WIRING DIAGRAMS”.
I
See EL section, “POWER SUPPLY ROUTING” for power distribution circuit.
When you perform trouble diagnoses, read GI section, “HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES” and “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRI-
CAL INCIDENT”.
AT-2
Tool number
Tool name
ST2505S001
Oil pressure gauge set
ST25051001
Oil pressure gauge
ST25052000
Hose
ST25053000
Joint pipe
ST25054000
Adapter
ST25055000
Adapter
PREPARATION AND PRECAUTIONS
Special Service Tools
Description
Measuring line pressure
NT097
ST07870000
Transmission case stand
KV31102100
Torque converter oneway clutch check tool
NT421
Disassembling and assembling
A/T
a: 182 mm (7.17 in) b: 282 mm (11.10 in) c: 230 mm (9.06 in) d: 100 mm (3.94 in)
Checking one-way clutch in torque converter
NT098
ST25850000
Sliding hammer
ST33200000
Drift
KV31102400
Clutch spring compressor
NT422
NT091
Removing oil pump assembly
a: 179 mm (7.05 in) b: 70 mm (2.76 in) c: 40 mm (1.57 in) dia.
d: M12 x 1.75P
Installing oil pump housing oil seal
Installing rear oil seal
a: 60 mm (2.36 in) dia.
b: 44.5 mm (1.752 in) dia.
Removing and installing clutch return springs
NT423
a: 320 mm (12.60 in) b: 174 mm (6.85 in)
AT-3
PREPARATION AND PRECAUTIONS
Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision.
The SRS system composition which is available to NISSAN MODEL R20 is as follows (The composition varies according to the destination.):
Driver air bag module (located in the center of the steering wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt pre-tensioner, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN dealer.
I
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
I
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation either just before the harness connectors or for the complete harness are related to the SRS.
Precautions
I
Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to prevent the internal parts from becoming contaminated by dirt or other foreign matter.
I
Disassembly should be done in a clean work area.
I
Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere with the operation of the transmission.
I
Place disassembled parts in order for easier and proper assembly.
I
All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or reassembly.
I
Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.
I
It is very important to perform functional tests whenever they are indicated.
I
The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place removed parts in a parts rack in order to replace them in correct positions and sequences. Care will also prevent springs and small parts from becoming scattered or lost.
I
Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
I
Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and seals, and to hold bearings and washers in place during assembly. Do not use grease.
I
Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
I
After overhaul, refill the transmission with new ATF.
I
When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque converter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the MA section when changing A/T fluid.
AT-4
PREPARATION AND PRECAUTIONS
Service Notice or Precautions
FAIL-SAFE
The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major electrical input/output device circuit is damaged.
Under Fail-Safe, the vehicle always runs in third gear even with a shift lever position of “1”, “2” or “D”. Customer may complain of “sluggish or poor acceleration”.
When the Fail-Safe operation occurs the next time the key is turned to the “ON” position, the SPORT indica-
tor lamp will blink for about 8 seconds. (For diagnosis, refer to AT-33.)
Fail-Safe may activate without electrical circuit damages if the vehicle is driven under extreme conditions (such as excessive wheel spins and emergency braking immediately afterwards). In this case, turn the ignition key
“OFF” for 5 seconds and then “ON” to recover normal shift pattern.
The blinking of the SPORT indicator lamp for about 8 seconds will appear only once and be cleared. The customer may resume normal driving conditions by chance.
Always follow the “WORK FLOW” (Refer to AT-26).
The SELF-DIAGNOSIS results will be as follows:
The first SELF-DIAGNOSIS will indicate the damage of the vehicle speed sensor or the revolution sensor.
During the next SELF-DIAGNOSIS performed after checking the sensor, no damages will be indicated.
AT-5
OVERALL SYSTEM
A/T Electrical Parts Location
AT-6
YAT352
OVERALL SYSTEM
Wiring Diagram — A/T —
AT-7
YAT260
OVERALL SYSTEM
Cross-sectional View
AT-8
SAT125BA
OVERALL SYSTEM
Hydraulic Control Circuits
AT-9
SAT624GA
OVERALL SYSTEM
Shift Mechanism
The automatic transmission uses compact, dual planetary gear systems to improve power-transmission efficiency, simplify construction and reduce weight.
It also employs an optimum shift control and superwide gear ratios. They improve starting performance and acceleration during medium and high-speed operation.
Two one-way clutches are also employed: one is used for the forward clutch and the other for the low clutch.
These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.
CONSTRUCTION
SAT509I q q q q q q
Torque converter clutch piston
Torque converter
Oil pump
Input shaft
Brake band
Reverse clutch
High clutch
Front pinion gear q q q q q q
Front sun gear
Front internal gear
Front planetary carrier
Rear sun gear
Rear pinion gear
Rear internal gear
Rear planetary carrier
Forward clutch q q q q q q
Forward one-way clutch
Overrun clutch
Low one-way clutch
Low & reverse brake
Parking pawl
Parking gear
Output shaft
FUNCTION OF CLUTCH AND BRAKE
Control members
Reverse clutch
High clutch
Forward clutch
Overrun clutch
Brake band
Forward one-way clutch
Low one-way clutch
Low & reverse brake
Abbr.
R/C
H/C
F/C
O/C
B/B
F/O.C
L/O.C
L & R/B
Function
To transmit input power to front sun gear q
.
To transmit input power to front planetary carrier q
.
To connect front planetary carrier q with forward one-way clutch q
.
To connect front planetary carrier q with rear internal gear q
.
To lock front sun gear q
.
When forward clutch is engaged, to stop rear internal gear q direction.
from rotating in opposite
At D
1 position, to prevent rear internal gear q from rotating in opposite direction.
To lock rear internal gear q
(R position).
(2, 1
2 and 1
1
), to lock front planetary carrier q
AT-10
OVERALL SYSTEM
Shift Mechanism (Cont’d)
CLUTCH AND BAND CHART
Shift position Reverse clutch
High clutch
Forward clutch
Overrun clutch
2nd apply
Band servo
3rd release
4th apply
Forward oneway clutch
Low oneway clutch
Low & reverse brake
Lock-up Remarks
P
PARK
POSITION
R
N q q
REVERSE
POSITION
NEUTRAL
POSITION
D*4
1st
2nd
3rd
4th q q q q q
*1
*1
*1 *2 q
*3 q v v v v q
Automatic shift
1
)
2
)
3
)
4
2
1st
2nd q q q q v v v v
Automatic shift
1 ) 2
1
1st
2nd q q q q v q
Locks (held stationary) in 1st speed
1 + 2
*1: Operates when overdrive control or A/T mode switch is being set in “OFF” or “SPORT” position.
*2: Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract because oil pressure area on the “release” side is greater than that on the “apply” side.
*3: Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts.
*4: A/T will not shift to 4th when overdrive control or A/T mode switch is set in “OFF” or “SPORT” position.
q
: Operates.
: Operates when throttle opening is less than 3/16, activating engine brake.
v
: Operates during “progressive” acceleration.
: Operates but does not affect power transmission.
: Operates when throttle opening is less than 3/16, but does not affect engine brake.
AT-11
OVERALL SYSTEM
Control System
OUTLINE
The automatic transmission senses vehicle operating conditions through various sensors. It always controls the optimum shaft position and reduces shifting and lock-up shocks.
SENSORS TCM ACTUATORS
Park/neutral position switch
Throttle (accelerator) position sensor
Closed throttle position switch
Wide open throttle position switch
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
A/T mode switch
E
Shift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
Duet-EU control
CONSULT-II communication line control
E
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid valve
Line pressure solenoid valve
O/D OFF or SPORT indicator lamp
CONTROL SYSTEM
AT-12
NAT230
OVERALL SYSTEM
Control System (Cont’d)
TCM FUNCTION
The function of the TCM is to:
I
Receive input signals sent from various switches and sensors.
I
Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
I
Send required output signals to the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
Sensors and solenoid valves
Park/neutral position switch
Throttle (accelerator) position sensor
Closed throttle position switch
Wide open throttle position switch
Input
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Function
Detects select lever position and sends a signal to TCM.
Detects throttle valve position and sends a signal to TCM.
Detects throttle valve’s fully-closed position and sends a signal to TCM.
Detects a throttle valve position of greater than 1/2 of full throttle and sends a signal to TCM.
From ECM.
Detects transmission fluid temperature and sends a signal to TCM.
Detects output shaft rpm and sends a signal to TCM.
Used as an auxiliary vehicle speed sensor. Sends a signal when revolution sensor (installed on transmission) malfunctions.
Overdrive control switch
A/T mode switch
Shift solenoid valve A/B
Line pressure solenoid valve
Output Torque converter clutch solenoid valve
Overrun clutch solenoid valve
Sends a signal, which prohibits a shift to “D
4
” (overdrive) position, to the TCM.
Selects shifting point suited to driving conditions in relation to a signal sent from
TCM.
Regulates (or decreases) line pressure suited to driving conditions in relation to a signal sent from TCM.
Regulates (or decreases) lock-up pressure suited to driving conditions in relation to a signal sent from TCM.
Controls an “engine brake” effect suited to driving conditions in relation to a signal sent from TCM.
O/D OFF indicator lamp
SPORT indicator lamp
Shows TCM malfunctions, when A/T control components malfunction.
AT-13
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis
After performing this procedure, place check marks for results on
the “DIAGNOSTIC WORKSHEET”, AT-24. Reference pages are
provided following the items.
SELF-DIAGNOSTIC PROCEDURE (With CONSULT-II)
1. Turn on CONSULT-II and touch “A/T”.
If A/T is not displayed, check TCM power supply and ground
circuit. Refer to AT-46. If result is NG, refer to EL section
(“POWER SUPPLY ROUTING”).
SAT014K
2. Touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing operation.
CONSULT-II performs REAL-TIME SELF-DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
SAT987J
No failure
Item
Initial start
Vehicle speed sensor
⋅
A/T
(Revolution sensor)
Vehicle speed sensor
⋅
MTR (Meter)
Display
****NO FAILURE****
*INITIAL START*
VHCL SPEED SEN
⋅
A/T
VHCL SPEED SEN
⋅
MTR
Throttle (accelerator) position sensor
THROTTLE POSI SEN
Shift solenoid valve A SHIFT SOLENOID/V A
Shift solenoid valve B SHIFT SOLENOID/V B
Overrun clutch solenoid valve
T/C clutch solenoid valve
A/T fluid temperature sensor/TCM power source
Engine speed signal
Line pressure solenoid valve
TCM (ROM)
TCM (RAM)
OVERRUN CLUTCH S/V
T/C CLUTCH SOL/V
BATT/FLUID TEMP SEN
ENGINE SPEED SIG
LINE PRESSURE S/V
CONTROL UNIT (ROM)
CONTROL UNIT (RAM)
Description
I
No failure has been detected.
[
I
This is NOT a malfunction message.
Whenever shutting off a power supply to the
TCM, this message appears on the screen.
]
I
No signal input from vehicle speed sensor
⋅
A/T (revolution sensor) during traveling due to disconnection, or input of abnormal signal.
I
No signal input from vehicle speed sensor
⋅
MTR during traveling due to disconnection, or input of abnormal signal.
I
Throttle (accelerator) position sensor signal voltage is abnormally high.
I
Throttle (accelerator) position sensor signal voltage is abnormally low with closed throttle position switch “OFF” or wide open throttle position switch “ON”.
I
Specified voltage is not applied to solenoid valve due to disconnection or shortcircuit.
I
Specified voltage is not applied to solenoid valve due to disconnection or shortcircuit.
I
Specified voltage is not applied to solenoid valve due to disconnection or shortcircuit.
I
Specified voltage is not applied to solenoid valve due to disconnection or shortcircuit.
I
Supply voltage to TCM is abnormally low during traveling.
I
Fluid temperature signal voltage is abnormally high
(fluid temperature is low) during traveling.
I
Engine RPM is abnormally low during traveling.
I
Specified voltage is not applied to solenoid valve due to disconnection or shortcircuit.
I
TCM memory (ROM) is malfunctioning.
I
TCM memory (RAM) is malfunctioning.
Remarks
To be displayed in case of abnormality and no recording is made
AT-14
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont’d)
SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)
DIAGNOSIS START
H
1. Start engine and warm it up to normal engine operating temperature.
2. Turn ignition switch to “OFF” position.
Wait at least 5 seconds.
NAT309
SAT879E
H
1. Set A/T mode switch to “AUTO” position.
2. Set overdrive control switch in “ON” position.
3. Move selector lever to “P” position.
4. Turn ignition switch to “ON” position.
(Do not start engine.)
5. Does SPORT indicator lamp come on for about 2 seconds?
Yes
No
E
Go to 1. SPORT Indicator
Lamp Does Not Come On,
H
1. Turn ignition switch to “ACC” position.
2. Move selector lever to “D” position.
H
SAT244I
AT-15
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont’d)
SAT881E
H
1. Set overdrive control switch in “OFF” position.
2. Depress accelerator pedal fully and release it.
3. Turn ignition switch “ON”.
(Do not start engine.)
1. Move selector lever to “2” position.
2. Set overdrive control switch in “ON” position.
H
FAT245I
1. Move selector lever to “1” position.
2. Set overdrive control switch in “OFF” position.
H
H
Depress accelerator pedal fully and release it.
SAT246I
H
Check SPORT indicator lamp.
Refer to JUDGEMENT OF SELF-
H
DIAGNOSIS END
SAT981F
NAT309
AT-16
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont’d)
JUDGEMENT OF SELF-DIAGNOSIS CODE
All judgement flickers are same.
SPORT indicator lamps
4th judgement flicker is longer than others.
SAT819H
All circuits that can be confirmed by self-diagnosis are OK.
1st judgement flicker is longer than others.
SAT797H
Shift solenoid valve A circuit is short-circuited or disconnected.
Go to SHIFT SOLENOID VALVE A, AT-63.
5th judgement flicker is longer than others.
SAT794H
Revolution sensor circuit is short-circuited or disconnected.
Go to VEHICLE SPEED SENSOR
⋅
A/T (REVOLUTION
2nd judgement flicker is longer than others.
SAT798H
Shift solenoid valve B circuit is short-circuited or disconnected.
Go to SHIFT SOLENOID VALVE B, AT-66.
6th judgement flicker is longer than others.
SAT795H
Vehicle speed sensor circuit is short-circuited or disconnected.
Go to VEHICLE SPEED SENSOR
⋅
3rd judgement flicker is longer than others.
SAT799H
Overrun clutch solenoid valve circuit is short-circuited or disconnected.
Go to OVERRUN CLUTCH SOLENOID VALVE, AT-69.
7th judgement flicker is longer than others.
SAT796H
Throttle (accelerator) position sensor circuit is short-circuited or disconnected.
Go to THROTTLE (ACCELERATOR) POSITION
SAT800H
Torque converter clutch solenoid valve circuit is short-circuited or disconnected.
Go to TORQUE CONVERTER CLUTCH SOLENOID
t
1
= 2.5 seconds t
2
= 2.0 seconds t
3
= 1.0 second
AT-17
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont’d)
8th judgement flicker is longer than others.
SPORT indicator lamps
Flickers as shown below.
SAT801H
A/T fluid temperature sensor is disconnected or TCM power source circuit is damaged.
Go to A/T FLUID TEMPERATURE SENSOR AND TCM
9th judgement flicker is longer than others.
Does not come on.
SAT804H
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a problem.)
SAT802H
Engine speed signal circuit is short-circuited or disconnected.
Go to ENGINE SPEED SIGNAL, AT-80.
SAT805H
Park/neutral position, overdrive control or throttle (accelerator) position switches circuit is disconnected or TCM is damaged.
Go to PARK/NEUTRAL POSITION, OVERDRIVE CON-
TROL AND THROTTLE (ACCELERATOR) POSITION
10th judgement flicker is longer than others.
SAT803H
Line pressure solenoid valve circuit is short-circuited or disconnected.
Go to LINE PRESSURE SOLENOID VALVE, AT-84.
t
4
= 1.0 second
AT-18
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont’d)
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(With CONSULT-II)
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait for at least 5 seconds and then turn it “ON” again.
2. Turn CONSULT-II “ON”, and touch “A/T”.
SAT014K
3. Touch “SELF-DIAG RESULTS”.
SEF949Y
4. Touch “ERASE”. (The self-diagnostic results will be erased.)
SAT970J
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(Without CONSULT-II)
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait for at least 5 seconds and then turn it “ON” again.
2. Perform “SELF-DIAGNOSTIC PROCEDURE (Without CON-
3. Turn ignition switch “OFF”. (The self-diagnostic results will be erased.)
AT-19
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnosis by CONSULT-II
NOTICE
1. The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each solenoid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Manual may differ slightly. This occurs because of the following reasons:
I
Actual shift schedule has more or less tolerance or allowance,
I
Shift schedule indicated in Service Manual refers to the point where shifts start. Gear position displayed on CONSULT-II indicates the point where shifts are completed.
3. Shift solenoid valve “A” or “B” is displayed on CONSULT-II at the start of shifting. Gear position is displayed upon completion of shifting (which is computed by TCM).
4. Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II unit.
SELF-DIAGNOSTIC RESULT TEST MODE
DATA MONITOR DIAGNOSTIC TEST MODE
Item Display
Monitor item
ECU input signals
Main signals
Vehicle speed sensor 1
(A/T)
(Revolution sensor)
VHCL/S SE
⋅
A/T
[km/h] or [mph]
X —
Vehicle speed sensor 2
(Meter)
Throttle (accelerator) position sensor
A/T fluid temperature sensor
Battery voltage
Engine speed
VHCL/S SE
⋅
MTR
[km/h] or [mph]
THRTL POS SEN
[V]
FLUID TEMP SE
[V]
BATTERY VOLT
[V]
ENGINE SPEED
[rpm]
X
X
X
X
—
—
—
—
Description Remarks
I
Vehicle speed computed from signal of revolution sensor is displayed.
I
Vehicle speed computed from signal of vehicle speed sensor is displayed.
When racing engine in “N” or “P” position with vehicle stationary, CON-
SULT-II data may not indicate
0 km/h (0 MPH).
Vehicle speed display may not be accurate under approx. 10 km/h
(6 MPH). It may not indicate 0 km/h (0
MPH) when vehicle is stationary.
I
Throttle (accelerator) position sensor signal voltage is displayed.
I
A/T fluid temperature sensor signal voltage is displayed.
I
Signal voltage lowers as fluid temperature rises.
I
Source voltage of TCM is displayed.
Overdrive control switch OVERDRIVE SW
[ON/OFF]
P/N position switch P/N POSI SW
[ON/OFF]
R position switch
D position switch
2 position switch
R POSITION SW
[ON/OFF]
D POSITION SW
[ON/OFF]
2 POSITION SW
[ON/OFF]
1 position switch
ASCD-cruise signal
1 POSITION SW
[ON/OFF]
ASCD
⋅
CRUISE
[ON/OFF]
X
X
X
X
X
X
X
X
X
—
—
—
—
—
—
—
I
Engine speed, computed from engine speed signal, is displayed.
Engine speed display may not be accurate under approx. 800 rpm. It may not indicate 0 rpm even when engine is not running.
I
ON/OFF state computed from signal of overdrive control SW is displayed.
I
ON/OFF state computed from signal of P/N position SW is displayed.
I
ON/OFF state computed from signal of R position SW is displayed.
I
ON/OFF state computed from signal of D position SW is displayed.
I
ON/OFF status, computed from signal of 2 position SW, is displayed.
I
ON/OFF status, computed from signal of 1 position SW, is displayed.
I
Status of ASCD cruise signal is displayed.
ON ... Cruising state
OFF ... Normal running state
I
This is displayed even when no
ASCD is mounted.
AT-20
Item
ASCD-OD cut signal
Kickdown switch
A/T mode switch
Closed throttle position switch
Wide open throttle position switch
W/O THRL/P-SW
[ON/OFF]
A/T mode switch
Gear position
Selector lever position
Vehicle speed
Throttle (accelerator) position
Line pressure duty
Torque converter clutch solenoid valve duty
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnosis by CONSULT-II (Cont’d)
Display
ASCD
⋅
OD CUT
[ON/OFF]
KICKDOWN SW
[ON/OFF]
POWER SHIFT SW
[ON/OFF]
CLOSED THL/SW
[ON/OFF]
HOLD SW
[ON/OFF]
GEAR
SLCT LVR POSI
VEHICLE SPEED
[km/h] or [mph]
THROTTLE POSI
[/8]
LINE PRES DTY
[%]
TCC S/V DUTY
[%]
SHIFT S/V A
[ON/OFF]
SHIFT S/V B
[ON/OFF]
OVERRUN/C S/V
[ON/OFF]
Self-diagnosis display lamp
(SPORT indicator lamp)
X: Applicable
—: Not applicable
SELF-D DP LMP
[ON/OFF]
Monitor item
ECU input signals
Main signals
X
X
X
X
X
X
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
X
X
X
X
X
X
X
X
X
X
Description Remarks
I
Status of ASCD
⋅
OD release signal is displayed.
ON ... OD released
OFF ... OD not released
I
ON/OFF status, computed from signal of kickdown SW, is displayed.
I
ON/OFF state computed from signal of SPORT shift SW is displayed.
I
ON/OFF status, computed from signal of closed throttle (accelerator) position SW, is displayed.
I
ON/OFF status, computed from signal of wide open throttle (accelerator) position SW, is displayed.
I
ON/OFF status, computed from signal of SNOW shift SW, is displayed.
I
Gear position data used for computation by TCM, is displayed.
I
Selector lever position data, used for computation by TCM, is displayed.
I
Vehicle speed data, used for computation by TCM, is displayed.
I
Throttle (accelerator) position data, used for computation by TCM, is displayed.
I
Control value of line pressure solenoid valve, computed by TCM from each input signal, is displayed.
I
Control value of torque converter clutch solenoid valve, computed by
TCM from each input signal, is displayed.
I
Control value of shift solenoid valve
A, computed by TCM from each input signal, is displayed.
I
Control value of shift solenoid valve
B, computed by TCM from each input signal, is displayed.
I
Control value of overrun clutch solenoid valve computed by TCM from each input signal is displayed.
I
Control status of SPORT indicator lamp is displayed.
I
This is displayed even when no
ASCD is mounted.
I
This is displayed even when no kickdown switch is equipped.
I
A specific value used for control is displayed if fail-safe is activated due to error.
I
A specific value used for control is displayed if fail-safe is activated due to error.
Control value of solenoid is displayed even if solenoid circuit is disconnected.
The “OFF” signal is displayed if solenoid circuit is shorted.
AT-21
TROUBLE DIAGNOSIS — Introduction
SAT631IA
SAT632I
Introduction
The TCM receives a signal from the vehicle-speed sensor, throttle
(accelerator) position sensor or park/neutral position switch and provides shift control or lock-up control via solenoid valves.
Input and output signals must always be correct and stable in the operation of the A/T system. The A/T system must be in good operating condition and be free of valve seizure, solenoid valve malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are caused by poor electric connections or improper wiring. In this case, careful checking of suspected circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the problems. A road test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the “Work Flow”. Refer to AT-26.
Before undertaking actual checks, take a few minutes to talk with a customer who approaches with a driveability complaint. The customer can supply good information about such problems, especially intermittent ones. Find out what symptoms are present and under what conditions they occur. A “Diagnostic Worksheet” like the
example (AT-24) should be used.
Start your diagnosis by looking for “conventional” problems first.
This will help troubleshoot driveability problems on an electronically controlled engine vehicle.
SEF234G
AT-22
TROUBLE DIAGNOSIS — Introduction
Diagnostic Worksheet
INFORMATION FROM CUSTOMER
KEY POINTS
WHAT ......................... Vehicle & A/T model
WHEN ......................... Date, Frequencies
WHERE ...................... Road conditions
HOW ........................... Operating conditions, Symptoms
Customer name MR/MS Model & Year VIN
Trans. model
Incident Date
Frequency
Symptoms
SPORT indicator lamp
Malfunction indicator lamp
(MIL)
Engine Mileage
Manuf. Date In Service Date l
Continuous l
Intermittent ( times a day) l
Vehicle does not move.
( l
Any position l
Particular position) l
No up-shift ( l
1st , 2nd l
2nd , 3rd l
3rd , O/D) l
No down-shift ( l
O/D
,
3rd l
3rd
,
2nd l
2nd
,
1st) l
Lockup malfunction l
Shift point too high or too low.
l
Shift shock or slip ( l
N
,
D l
Lockup l
Any drive position) l
Noise or vibration l
No kickdown l
No pattern select
( l
Others
Blinks for about 8 seconds.
l
Continuously lit l
Not lit l
Continuously lit l
Not lit
)
AT-23
TROUBLE DIAGNOSIS — Introduction
Diagnostic Worksheet (Cont’d)
DIAGNOSTIC WORKSHEET
1.
l
Read the Fail-safe and listen to customer complaints.
2.
l
A/T FLUID CHECK l
Leakage (Follow specified procedure) l
Fluid condition l
Fluid level
3.
l
Perform STALL TEST and LINE PRESSURE TEST.
l
Stall test — Mark possible damaged components/others.
l
Torque converter one-way clutch l
Reverse clutch l
Forward clutch l
Overrun clutch l
Forward one-way clutch l
Low & reverse brake l
Low one-way clutch l
Engine l
Line pressure is low l
Clutches and brakes except high clutch and brake band are OK l
Line pressure test — Suspected parts:
4.
l
Perform all ROAD TEST and mark required procedures.
4-1. Check before engine is started.
l
SELF-DIAGNOSTIC PROCEDURE — Mark detected items.
l
Vehicle speed sensor
⋅
A/T (Revolution sensor), AT-50.
l
Vehicle speed sensor
⋅
l
Throttle (accelerator) position sensor, AT-60.
l
Shift solenoid valve A, AT-63.
l
Shift solenoid valve B, AT-66.
l
Overrun clutch solenoid valve, AT-69.
l
Torque converter clutch solenoid valve, AT-88.
l
A/T fluid temperature sensor and TCM power source, AT-76.
l
l
Line pressure solenoid valve, AT-84.
l
Park/neutral position, overdrive control, A/T check and throttle
(accelerator) position switches, AT-88.
l
Battery l
Others
4-2. Check at idle l
1. SPORT Indicator Lamp Does Not Come On, AT-92.
l
2. SPORT or SNOW Indicator Lamp Does Not Come On, AT-95.
l
3. O/D OFF Indicator Lamp Does Not Come On, AT-95.
l
4. SPORT Indicator Lamp Does Not Come On, AT-96.
l
5. Engine Cannot Be Started In “P” And “N” Position, AT-97.
l
6. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT-97.
l
7. In “N” Position, Vehicle Moves, AT-98.
l
8. Large Shock. “N” ,
l
9. Vehicle Does Not Creep Backward In “R” Position, AT-100.
l
10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-101.
4-3. Cruise test
Part-1 l
11. Vehicle Cannot Be Started From D l
12. A/T Does Not Shift: D
1 l
13. A/T Does Not Shift: D
2 l
14. A/T Does Not Shift: D
3
,
D
2
, D
3
, D
4
1
Or Does Not Kickdown: D
l
15. A/T Does Not Perform Lock-up, AT-106.
4 l
16. A/T Does Not Hold Lock-up Condition, AT-107.
l
17. Lock-up Is Not Released, AT-107.
l
18. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
2
, D
3
AT-24
TROUBLE DIAGNOSIS — Introduction
Diagnostic Worksheet (Cont’d)
4.
Part-2 l
19. Vehicle Does Not Start From D l
12. A/T Does Not Shift: D l
13. A/T Does Not Shift: D l
14. A/T Does Not Shift: D
1
2
3
, D
,
D
, D
2
3
4
1
Or Does Not Kickdown: D
4
, D
2
Part-3 l
20. A/T Does Not Shift: D l
21. A/T Does Not Shift: D
2
4
, D
1
, D
3
When Depressing Accelerator Pedal, AT-5.
When Overdrive Control Switch “ON” ,
l
18. Engine Speed Does Not Return To Idle (Engine Brake In D
3
, When Selector Lever “D”
,
“2” Position, l
22. A/T Does Not Shift: D
3 l
23. A/T Does Not Shift: 2
2
,
2
2
l
18. Engine Speed Does Not Return To Idle (Engine Brake In 2
, 1
1 l
24. Vehicle Does Not Decelerate By Engine Brake, AT-112.
l
SELF-DIAGNOSTIC PROCEDURE — Mark detected items.
2
, When Selector Lever “2” , “1” Position, l
Vehicle speed sensor
⋅
A/T (Revolution sensor), AT-50.
l
Vehicle speed sensor
⋅
l
Throttle (accelerator) position sensor, AT-60.
l
Shift solenoid valve A, AT-63.
l
Shift solenoid valve B, AT-66.
l
Overrun clutch solenoid valve, AT-69.
l
Torque converter clutch solenoid valve, AT-69.
l
A/T fluid temperature sensor and TCM power source, AT-76.
l
l
Line pressure solenoid valve, AT-84.
l
Park/neutral position, overdrive control, A/T check and throttle
(accelerator) position switches, AT-88.
l
Battery l
Others
5.
l
For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts.
6.
l
Perform all ROAD TEST and re-mark required procedures.
7.
l
Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible symptoms and the component inspection orders.)
8.
l
Erase self-diagnosis code from TCM memories.
AT-25
TROUBLE DIAGNOSIS — Introduction
Work Flow
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a problem. It is important to fully understand the symptoms or conditions for a customer complaint.
Make good use of the two sheets provided, “INFORMATION FROM CUSTOMER” and “DIAGNOSTIC
WORKSHEET”, to perform the best troubleshooting possible.
CHECK IN
H
LISTEN TO CUSTOMER COMPLAINTS AND FILL OUT
“INFORMATION FROM CUSTOMER”, AT-23.
Check for any Service Bulletins.
H
PERFORM STALL TEST AND LINE PRESSURE TEST.
F
H
CHECK A/T FLUID LEVEL AND CONDITION. IF NG, PLACE
CHECK ON THE DIAGNOSTIC WORKSHEET, AT-24.
F
F
H
PERFORM ROAD TEST WITH SELF-DIAGNOSIS AND
PLACE CHECKS FOR NG ITEMS ON THE DIAGNOSTIC
WORKSHEET.
F
NG items including self-diagnostic item
H
I
FOR SELF-DIAGNOSIS NG ITEMS:
-INSPECT EACH COMPONENT.
-REPAIR/REPLACE.
I
PERFORM ROAD TEST AND PLACE CHECKS FOR NG
ITEMS ON THE DIAGNOSTIC WORKSHEET AGAIN.
H
I
FOR ALL REMAINING MALFUNCTIONS:
-INSPECT EACH COMPONENT.
-REPAIR/REPLACE.
I
PERFORM ROAD TEST AND CONFIRM ALL MALFUNC-
TIONS ARE ELIMINATED.
F
F
Refer to FAIL-SAFE Service Notice or Precautions, AT-5.
Refer to A/T Fluid Check, AT-27.
Refer to Stall Test and Line Pressure Test, AT-27, AT-30.
Follow ROAD TEST procedure, AT-32.
I
Refer to self-diagnosis, AT-14.
I
Perform ROAD TEST for all items.
Refer to
I
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION,
I
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSIS CODE,
I
DIAGNOSTIC PROCEDURES FOR SYMPTOMS, AT-26,
I
H
ERASE SELF-DIAGNOSIS CODE FROM TCM MEMORIES.
F
Refer to HOW TO ERASE SELF-DIAGNOSIS RESULTS,
H
PERFORM FINAL CHECK
H
OK
CHECK OUT
F
Refer to SELF-DIAGNOSIS CONFIRMATION PROCEDURE,
AT-26
TROUBLE DIAGNOSIS — Basic Inspection
A/T Fluid Check
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. — for example, mating surface of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in “D” position and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
SAT801A
SAT638A
FLUID CONDITION CHECK
Fluid color
Dark or black with burned odor
Milky pink
Varnished fluid, light to dark brown and tacky
Suspected problem
Wear of frictional material
Water contamination — Road water entering through filler tube or breather
Oxidation — Over or under filling, — Overheating
FLUID LEVEL CHECK
Refer to MA section (“Checking A/T Fluid”, “CHASSIS AND BODY
MAINTENANCE”).
Stall Test
STALL TEST PROCEDURE
1. Check A/T and engine fluid levels. If necessary, add.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF reach operating temperature.
ATF operating temperature:
50 - 80°C (122 - 176°F)
SAT647B
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test.
I
It is good practice to put a mark on point of specified engine rpm on indicator.
SAT513G
5. Start engine, apply foot brake, and place selector lever in “D” position.
6. Accelerate to wide open throttle gradually while applying foot brake.
7. Quickly note the engine stall revolution and immediately release throttle.
I
During test, never hold throttle wide open for more than 5 seconds.
Stall revolution:
2,450 - 2,700 rpm
SAT514G
AT-27
TROUBLE DIAGNOSIS — Basic Inspection
Stall Test (Cont’d)
8. Move selector lever to “N” position.
9. Cool off ATF.
I
Run engine at idle for at least one minute.
10. Repeat steps 5 through 9 with selector lever in “2”, “1” and “R” positions.
SAT771B
JUDGEMENT OF STALL TEST
The test result and possible damaged components relating to each result are shown in the illustration.
In order to pinpoint the possible damaged components, follow the WORK FLOW as shown in AT-26.
Note
Stall revolution is too high in “D” or “2” position:
I
Slippage occurs in 1st gear but not in 2nd and 3rd gears. ..... Low one-way clutch slippage
I
Slippage occurs at the following gears:
1st through 3rd gears in “D” position and engine brake functions.
1st and 2nd gears in “2” position and engine brake functions with accelerator pedal released (fully closed throttle). ..... Forward clutch or forward one-way clutch slippage
Stall revolution is too high in “R” position:
I
Engine brake does not function in “1” position. ..... Low & reverse brake slippage
I
Engine brake functions in “1” position. ..... Reverse clutch slippage
Stall revolution within specifications:
I
Vehicle does not achieve speed of more than 80 km/h (50 MPH). ..... One-way clutch seizure in torque converter housing
CAUTION:
Be careful since automatic fluid temperature increases abnormally.
I
Slippage occurs in 3rd and 4th gears in “D” position. ..... High clutch slippage
I
Slippage occurs in 2nd and 4th gears in “D” position. ..... Brake band slippage
Stall revolution less than specifications:
I
Poor acceleration during starts. ..... One-way clutch seizure in torque converter
AT-28
TROUBLE DIAGNOSIS — Basic Inspection
Stall Test (Cont’d)
JUDGEMENT OF STALL TEST
AT-29
SAT392H
TROUBLE DIAGNOSIS — Basic Inspection
Line Pressure Test
LINE PRESSURE TEST PORTS
I
Location of line pressure test ports.
I
Always replace line pressure plugs as they are selfsealing bolts.
SAT209GA
LINE PRESSURE TEST PROCEDURE
1. Check A/T and engine fluid levels. If necessary, add fluid.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF reach operating temperature.
ATF operating temperature:
50 - 80°C (122 - 176°F)
SAT647B
3. Install pressure gauge to corresponding line pressure port.
SAT518GB
SAT519GA
AT-30
TROUBLE DIAGNOSIS — Basic Inspection
Line Pressure Test (Cont’d)
4. Set parking brake and block wheels.
I
Continue to depress brake pedal fully while line pressure test is being performed at stall speed.
SAT513G
5. Start engine and measure line pressure at idle and stall speed.
I
When measuring line pressure at stall speed, follow the stall test procedure.
Line pressure:
SAT493G
JUDGEMENT OF LINE PRESSURE TEST
At idle
At stall speed
Judgement
Line pressure is low in all positions.
Line pressure is low in particular position.
Line pressure is high.
Line pressure is low.
Suspected parts
I
Oil pump wear
I
Control piston damage
I
Pressure regulator valve or plug sticking
I
Spring for pressure regulator valve damaged
I
A/T fluid pressure leakage between oil strainer and pressure regulator valve
I
Clogged strainer
I
Fluid pressure leakage between manual valve and particular clutch
I
For example, line pressure is:
— Low in “R” and “1” positions,
— Normal in “D” and “2” positions.
Then, fluid leakage exists at or around low and reverse brake circuit.
Refer to “CLUTCH AND BAND CHART”, AT-11.
I
Mal-adjustment of throttle position sensor
I
A/T fluid temperature sensor damaged
I
Line pressure solenoid valve sticking
I
Short circuit of line pressure solenoid valve circuit
I
Pressure modifier valve sticking
I
Pressure regulator valve or plug sticking
I
Open in dropping resistor circuit
I
Mal-adjustment of throttle position sensor
I
Line pressure solenoid valve sticking
I
Short circuit of line pressure solenoid valve circuit
I
Pressure regulator valve or plug sticking
I
Pressure modifier valve sticking
I
Pilot valve sticking
AT-31
TROUBLE DIAGNOSIS — Basic Inspection
Road Test
DESCRIPTION
I
The purpose of the test is to determine overall performance of
A/T and analyze causes of problems.
I
The road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
3. Cruise test
SAT786A
I
Before road test, familiarize yourself with all test procedures and items to check.
I
Conduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”
and “DIAGNOSTIC PROCEDURES FOR SYMPTOMS”, AT-14
SAT496G
AT-32
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
1. CHECK BEFORE ENGINE IS STARTED
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
NAT309
H
1. Set A/T mode switch to “AUTO” position.
2. Move selector lever to “P” position.
3. Turn ignition switch to “ON” position.
(Do not start engine.)
4. Does SPORT indicator lamp come on for about 2 seconds?
Yes
No
E
Go to 1. SPORT Indicator
Lamp Does Not Come On,
H
Does SPORT indicator lamp flicker for about 8 seconds?
No
Yes
E
Perform self-diagnosis.
Refer to SELF-DIAGNO-
SAT853E
H
1. Set A/T mode switch to “SPORT” position.
2. Does SPORT indicator lamp come on?
Yes
No
E
Go to 2. SPORT or SNOW
(*) Indicator Lamp Does
H
Set overdrive control switch to “OFF” position.
NAT309
H
Does O/D OFF indicator lamp come on?
Yes
H
(Go to next page.)
No
E
Go to 3. O/D OFF Indicator Lamp Does Not Come
SAT857E
NAT232
AT-33
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
H
Depress brake pedal and move selector lever to “D” position.
SAT869E
H
1. Set A/T mode switch to “AUTO” position.
2. Depress and release accelerator pedal quickly.
SAT754A
H
Does SPORT indicator lamp come on for about 3 seconds after accelerator pedal is depressed?
Yes
H
Turn ignition switch to “OFF” position.
No
E
Go to 4. SPORT Indicator
Lamp Does Not Come On,
H
Perform self-diagnosis and note NG items:
Refer to SELF-DIAGNOSIS
NAT309
H
Go to “2. Check at idle”, AT-35.
AT-34
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
2. CHECK AT IDLE
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
3. Move selector lever to “P” or “N” position.
4. Turn ignition switch to start position.
5. Is engine started?
No
E
Go to “5. Engine Cannot
Be Started In “P” and “N”
SAT796A
H
Yes
1. Turn ignition switch to “OFF” position.
2. Move selector lever to “D”, “1”, “2” or
“R” position.
3. Turn ignition switch to start position.
4. Is engine started?
No
H
1. Turn ignition switch to “OFF” position.
2. Move selector lever to “P” position.
3. Release parking brake.
4. Push vehicle forward or backward.
5. Does vehicle move when it is pushed forward or backward?
Yes
E
Go to “5. Engine Cannot
Be Started In “P” and “N”
Yes
E
Go to “6. In “P” Position,
Vehicle Moves Forward Or
Backward When Pushed”,
SAT797A
H
No
1. Apply parking brake.
2. Move selector lever to “N” position.
3. Turn ignition switch to “START” position and start engine.
4. Release parking brake.
5. Does vehicle move forward or backward?
No
H
1. Apply foot brake.
2. Move selector lever to “R” position.
3. Is there large shock when changing from “N” to “R” position?
H
No
1. Release foot brake for several seconds.
2. Does vehicle creep backward when foot brake is released?
H
Yes
1. Move selector lever to “D”, “1” and “2” position and check if vehicle creeps forward.
2. Does vehicle creep forward in all three positions?
Yes
E
Go to “7. In “N” Position,
Yes
E
Go to “8. Large Shock. “N”
,
No
E
Go to “9. Vehicle Does Not
Creep Backward In “R”
No
E
Go to “10. Vehicle Does
Not Creep Forward In “D”,
“2” Or “1” Position”,
H
Yes
Go to “3. Cruise test”, AT-36.
AT-35
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
3. CRUISE TEST
I
Check all items listed in Parts 1 through 3.
With CONSULT-II
I
Using CONSULT-II, conduct a cruise test and record the result.
I
Print the result and ensure that shifts and lock-ups take place as per “Shift Schedule”.
SAT601J
CONSULT-II setting procedure
1. Turn off ignition switch.
2. Connect “CONSULT-II” to Data link connector for CONSULT-II.
Data link connector for CONSULT-II is located in instrument lower panel on driver side.
NAT233
NAT234
3. Turn on ignition switch.
4. Touch “START”.
SAT586J
5. Touch “A/T”.
SAT250J
AT-36
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
6. Touch “DATA MONITOR”.
SAT252K
7. Touch “MAIN SIGNALS” to set recording condition.
8. See “Numerical Display”, “Barchart Display” or “Line Graph Display”.
9. Touch “START”.
SAT253K
10. When performing cruise test, touch “Store Data”.
SAT236K
11. After finishing cruise test part 1, touch “STOP”.
SAT237K
12. Touch “STORE”.
SAT254K
AT-37
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
13. Touch “DISPLAY”.
SAT608J
14. Touch “PRINT”.
15. Check the monitor data printed out.
16. Continue cruise test part 2 and 3.
SAT238K
Without CONSULT-II
I
Throttle (accelerator) position can be checked by voltage across terminals q and q of TCM.
NAT235
AT-38
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
CRUISE TEST — Part 1
Drive vehicle for approx. 10 minutes to warm engine oil and ATF up to operating temperature.
ATF operating temperature:
50 - 80°C (122 - 176°F)
SAT774B
1. Park vehicle on flat surface.
2. Set overdrive control switch to “ON” position.
H
3. Move selector lever to “P” position.
4. Start engine.
H
Move selector lever to “D” position.
SAT775B
H
Accelerate vehicle by constantly depressing accelerator pedal halfway.
SAT495G
SAT401H
H
Does vehicle start from D
1
?
Read gear position.
Yes
H
Does A/T shift from D
1 fied speed?
to D
2 at the speci-
Read gear position, throttle opening and vehicle speed.
Specified speed when shifting from
D
1 to D
2
:
Refer to Shift schedule, AT-196.
Yes
H
Does A/T shift from D
2 fied speed?
to D
3 at the speci-
Read gear position, throttle position and vehicle speed.
Specified speed when shifting from
D
2 to D
3
:
Refer to Shift schedule, AT-104.
H
Yes
No
E
Go to “11. Vehicle Cannot
Be Started From D
1
”,
No
E
Go to “12. A/T Does Not
Shift: D
1
, D
2
Or Does
Not Kickdown: D
4
, D
2
”,
No
E
Go to “13. A/T Does Not
Shift: D
2
,
D
3
(Go to next page.)
AT-39
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
SAT402H
SAT403H
H
Does A/T shift from D
3 fied speed?
to D
4 at the speci-
Read gear position, throttle position and vehicle speed.
Specified speed when shifting from
D
3 to D
4
:
Refer to Shift schedule, AT-196.
Yes
No
E
Go to “14. A/T Does Not
Shift: D
3
,
D
4
H
Does A/T perform lock-up at the specified speed?
Read vehicle speed, throttle position when lock-up duty becomes
94%.
Specified speed when lock-up occurs:
Refer to Shift schedule, AT-196.
H
Yes
Does A/T hold lock-up condition for more than 30 seconds?
Yes
H
1. Release accelerator pedal.
2. Is lock-up released when accelerator pedal is released?
Yes
No
No
No
E
E
E
Go to “15. A/T Does Not
Go to “16. A/T Does Not
Hold Lock-up Condition”,
Go to “17. Lock-up Is Not
H
1. Decelerate vehicle by applying foot brake lightly.
2. Does engine speed return to idle smoothly when A/T is shifted from D
4
D
3
?
Read gear position and engine speed.
to
H
Yes
1. Stop vehicle.
2. Go to “Cruise test — Part 2”, AT-41.
No
E
Go to “18. Engine Speed
Does Not Return To Idle
(Light Braking D
4
,
D
3
)”,
AT-40
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
CRUISE TEST — Part 2
SAT495G
SAT404H
SAT405H
SAT124I
1. Confirm overdrive control switch is in
“ON” position.
2. Confirm selector lever is in “D” position.
3. Accelerate vehicle by half throttle again.
4. Does vehicle start from D
1
?
Read gear position.
Yes
H
1. Accelerate vehicle to 80 km/h (50
MPH) as shown in illustration.
2. Release accelerator pedal and then quickly depress it fully.
3. Does A/T shift from D
4 to D
2 as soon as accelerator pedal is depressed fully?
Read gear position and throttle position.
Yes
H
Does A/T shift from D
2 fied speed?
to D
3 at the speci-
Read gear position, throttle position and vehicle speed.
Specified speed when shifting from
D
2 to D
3
:
Refer to Shift schedule, AT-196.
Yes
H
1. Release accelerator pedal after shifting from D
2 to D
3
.
2. Does A/T shift from D
3 to D
4 and does vehicle decelerate by engine brake?
Read gear position, throttle position and vehicle speed.
Yes
H
1. Decelerate to 10 km/h (6 MPH) with accelerator pedal released and then quickly depress it fully.
2. Does A/T shift from D
2 to D
1 as soon as accelerator pedal is depressed fully?
H
Yes
1. Stop vehicle.
2. Go to “Cruise test — Part 3”, AT-42.
No
E
Go to “19. Vehicle Does
Not Start From D
1
”,
No
E
Go to “12. A/T Does Not
Shift: D
1
,
D
2
Or Does
Not Kickdown: D
4
, D
2
”,
No
E
Go to “13. A/T Does Not
Shift: D
2
, D
3
No
E
Go to “14. A/T Does Not
Shift: D
3
, D
4
No
E
Go to “20. A/T Does Not
Shift: D
2
,
D
1
When
Depressing Accelerator
AT-41
TROUBLE DIAGNOSIS — Basic Inspection
Road Test (Cont’d)
CRUISE TEST — Part 3
1. Confirm overdrive control switch is in
“ON” position.
2. Confirm selector lever is in “D” position.
SAT812A
SAT813A
H
Accelerate vehicle using half-throttle to D
4
.
H
Release accelerator pedal.
H
Set overdrive control switch to “OFF” position while driving in D
4
.
H
Does A/T shift from D
4 to D
3
(O/D OFF)?
Read gear position and vehicle speed.
H
Yes
Does vehicle decelerate by engine brake?
Yes
H
Move selector lever from “D” to “2” position while driving in D
3
(O/D OFF).
No
E
Go to “21. A/T Does Not
Shift: D
4
,
D
3
, When
Overdrive Control Switch
“ON” ,
No
E
Go to “18. Engine Speed
Does Not Return To Idle
(Light Braking D
4
, D
3
)”,
SAT776BA
H
Does A/T shift from D
3
(O/D OFF) to 2
2
?
Read gear position.
Yes
H
Does vehicle decelerate by engine brake?
Yes
SAT791GA
H
1. Move selector lever from “2” to “1” position while driving in 2
2
.
2. Does A/T shift from 2
2 to 1
1
Read gear position.
position?
H
Yes
Does vehicle decelerate by engine brake?
Yes
H
1. Stop vehicle.
2. Perform self-diagnosis. Refer to SELF-
No
E
Go to “22. A/T Does Not
Shift: D
3
, 2
2
, When
Selector Lever “D” , “2”
No
E
Go to “18. Engine Speed
Does Not Return To Idle
(Light Braking D
4
, D
3
)”,
No
E
Go to “23. A/T Does Not
Shift: 2
2
, 1
1
, When
Selector Lever “2” , “1”
No
E
Go to “24. Vehicle Does
Not Decelerate By
SAT778B
AT-42
TROUBLE DIAGNOSIS — General Description
Reference page (AT)
F
Symptom Chart
ON vehicle
E F
OFF vehicle
E
Numbers are arranged in order of probability.
Perform inspections starting with number one and work up. Circled numbers indicate that the transmission must be removed from the vehicle.
Engine does not start in “N”, “P” positions.
.
2 3 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1 .
.
.
.
.
.
.
.
.
.
.
Engine starts in position other than “N” and “P”.
Transmission noise in “P” and “N” positions.
.
1
1 2 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
3 4 5 .
2 .
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
Vehicle moves when changing into “P” position or parking gear does not disengage when shifted out of “P” position.
.
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Vehicle runs in “N” position.
.
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2 .
.
.
q
.
q
.
q
.
.
.
Vehicle will not run in “R” position (but runs in “D”,
“2” and “1” positions). Clutch slips.
Very poor acceleration.
.
1 .
.
.
.
.
2 4 .
.
3 .
.
.
.
.
.
.
.
.
.
q
.
q
.
q
.
Vehicle braked when shifting into “R” position.
Sharp shock in shifting from “N” to “D” position.
Vehicle will not run in “D” and “2” positions (but runs in “1” and “R” position).
.
1 2 .
.
.
.
.
3 5 .
.
4 .
.
.
.
.
.
.
.
.
.
.
q
.
.
.
2 .
5 1 3 7 .
.
6 .
.
4 8 .
.
.
.
.
.
.
.
q
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
q
.
.
.
.
.
.
.
q
.
q
.
.
.
.
.
Vehicle will not run in “D”, “1” and “2” positions (but runs in “R” position). Clutch slips.
Very poor acceleration.
Clutches or brakes slip somewhat in starting.
1 .
.
.
.
.
.
2 4 .
.
3 .
.
.
5 .
.
.
.
.
.
q
.
q
.
.
Excessive creep.
No creep at all.
Failure to change gear from “D
1
” to “D
2
”.
Failure to change gear from “D
2
” to “D
3
”.
.
.
Failure to change gear from “D
3
” to “D
4
”.
.
Too high a gear change point from “D
1
” to “D
2
”, from
“D
2
” to “D
3
”, from “D
3
” to “D
4
”.
.
1 Gear change directly from “D
1
” to “D
3
” occurs.
Engine stops when shifting lever into “R”, “D”, “2” and “1”.
.
.
1
1 2 .
3 .
.
.
4 6 .
.
5 .
.
.
7 .
.
8 .
q
.
q
.
.
.
q
.
.
.
.
.
.
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2 3 .
.
.
.
.
.
.
.
.
.
.
q
.
.
q
.
.
.
.
.
2 1 .
5 .
.
.
4 3 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
2 1 .
5 .
.
.
4 .
3 .
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
q
2 1 .
4 .
.
.
.
3 .
.
.
.
5 .
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
1
.
.
2
.
.
.
.
.
.
.
1
.
.
.
.
.
3
3
.
.
4
.
.
.
.
.
.
.
2
.
.
.
.
.
.
.
.
.
.
2
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
Too sharp a shock in change from “D
1
Too sharp a shock in change from “D
2
” to “D
2
” to “D
3
”.
”.
.
.
.
.
1 .
.
.
2 4 .
.
.
.
.
5 .
3 .
.
.
.
.
.
.
.
.
.
.
.
q
.
.
1 .
.
.
2 4 .
.
.
.
.
.
.
.
3 .
.
.
.
.
q
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
AT-43
Reference page (AT-
TROUBLE DIAGNOSIS — General Description
Symptom Chart (Cont’d)
F
ON vehicle
E F
)
OFF vehicle
E
Numbers are arranged in order of probability.
Perform inspections starting with number one and work up. Circled numbers indicate that the transmission must be removed from the vehicle.
Too sharp a shock in change from
“D
3
” to “D
4
”.
.
Almost no shock or clutches slipping in change from
“D
1
” to “D
2
”.
1
Almost no shock or slipping in change from “D
2
” to
“D
3
”.
Almost no shock or slipping in change from “D
3
” to
“D
4
”.
1
1
Vehicle braked by gear change from “D
1
” to “D
2
”.
Vehicle braked by gear change from “D
2
” to “D
3
”.
Vehicle braked by gear change from “D
3
” to “D
4
”.
Maximum speed not attained. Acceleration poor.
1
1
1
1
Failure to change gear from “D
4
” to “D
3
”.
Failure to change gear from “D
3
” to “D
2
” or from
“D
4
” to “D
2
”.
Failure to change gear from “D
2
” to “D
1
” or from
“D
3
” to “D
1
”.
Gear change shock felt during deceleration by releasing accelerator pedal.
1
1
1
.
.
.
.
.
.
.
.
.
1
2
2
2
.
.
.
.
.
.
.
.
.
.
.
.
2
3
3
3
4
5
5
5
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
4
.
.
.
.
4
.
3
.
.
4
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q q
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
q q q q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
2 .
.
.
.
.
5 3 4 .
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
2
2
1
.
.
.
.
.
.
.
.
.
.
.
2
5
5
4
3
3
.
4
4
.
.
.
.
.
.
.
.
.
3
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
2 .
.
.
.
6 4 .
5 .
3 .
.
.
.
.
.
.
.
.
.
.
.
q q q
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
q q
.
.
.
.
.
q q
.
Too high a change point from “D
4
” to “D
3
”, from “D
3
” to “D
2
”, from “D
2
” to “D
1
”.
.
Kickdown does not operate when depressing pedal in “D
4
” within kickdown vehicle speed.
Kickdown operates or engine overruns when depressing pedal in “D
4
” beyond kickdown vehicle speed limit.
.
.
.
.
.
.
.
.
1
1
2
2
2
1
.
.
.
.
.
.
.
.
.
.
.
.
.
3
3
.
4
4
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Races extremely fast or slips in changing from “D
4
” to “D
3
” when depressing pedal.
Races extremely fast or slips in changing from “D
4
” to “D
2
” when depressing pedal.
1
1
.
.
.
.
2
2
.
.
.
.
.
.
3
3
5
6
.
5
.
.
4
4
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
q
.
.
.
.
.
.
.
.
.
q
Races extremely fast or slips in changing from “D
3
” to “D
2
” when depressing pedal.
1 .
.
2 .
.
.
3 5 .
.
4 .
.
6 .
.
7 .
.
.
.
.
q
.
.
.
.
q
Races extremely fast or slips in changing from “D
4
” or “D
3
” to “D
1
” when depressing pedal.
1 .
.
2 .
.
.
3 5 .
.
4 .
.
.
.
.
.
.
.
.
Vehicle will not run in any position.
1 2 .
.
.
.
.
3 .
.
.
4 .
.
.
.
.
.
.
.
q
Transmission noise in “D”, “2”, “1” and “R” positions. 1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
q
.
q
.
.
.
.
.
.
.
q
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
AT-44
Reference page (AT-
TROUBLE DIAGNOSIS — General Description
Symptom Chart (Cont’d)
F
ON vehicle
E F
)
OFF vehicle
E
Numbers are arranged in order of probability.
Perform inspections starting with number one and work up. Circled numbers indicate that the transmission must be removed from the vehicle.
Failure to change from “D
3
” to “2” when changing lever into “2” position.
.
Gear change from “2
1
” to “2
2
” in “2” position.
Engine brake does not operate in “1” position.
Gear change from “1
1
” to “1
2
” in “1” position.
Does not change from “1
2
” to “1
1
” in “1” position.
Large shock changing from “1
2
” to “1
1
” in “1” position.
Transmission overheats.
ATF shoots out during operation.
White smoke emitted from exhaust pipe during operation.
Offensive smell at fluid charging pipe.
Torque converter is not locked up.
.
1
1
Torque converter clutch piston slip
Lock-up point is extremely high or low.
A/T does not shift to “D
4
” when driving with overdrive control switch “ON”.
.
Engine is stopped at “R”, “D”, “2” and “1” positions.
1
1
.
1
.
.
.
.
.
7 1 2 .
.
.
.
6 5 4 .
.
3 .
.
.
.
.
.
.
.
.
.
.
.
q
.
.
q
.
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2 1 3 4 .
.
.
6 5 .
.
.
7 .
.
.
.
.
.
.
.
.
.
.
.
q
.
q
.
2 1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1 .
2 .
.
.
4 3 .
.
.
5 .
.
.
.
.
.
.
.
.
.
.
.
q
.
q
.
.
.
.
.
.
.
.
1 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
3
.
.
.
.
.
2
.
4
.
6
.
.
.
.
.
5
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
q
.
3 1 2 4 .
6 8 .
.
.
7 .
5 .
.
.
.
.
q
.
.
2 .
.
.
3 6 .
.
5 4 .
.
.
.
.
.
.
q
.
.
.
.
.
.
.
5 4 3 .
2 .
.
.
.
.
.
.
.
.
.
q
.
.
.
.
q
.
.
.
q q
.
.
q
.
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1 2 .
.
.
4 .
.
.
3 .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2 1 3 .
.
8 6 4 .
.
.
5 7 .
.
.
.
.
.
.
.
.
.
.
q
.
.
q
.
q
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
AT-45
TROUBLE DIAGNOSIS — General Description
TCM Terminals and Reference Value
PREPARATION
I
Measure voltage between each terminal and terminal q by following “TCM INSPECTION TABLE”.
or q
SAT010C
TCM HARNESS CONNECTOR TERMINAL LAYOUT
TCM INSPECTION TABLE
(Data are reference values.)
Terminal
No.
Item
1
Line pressure solenoid valve
2
Line pressure solenoid valve
(with dropping resistor)
3
Torque converter clutch solenoid valve
5*
6*
7*
9
DT1
DT2
DT3
—
*: These terminals are connected to the ECM.
Condition
Judgement standard
When releasing accelerator pedal after warming up engine.
When depressing accelerator pedal fully after warming up engine.
When releasing accelerator pedal after warming up engine.
When depressing accelerator pedal fully after warming up engine.
1.5 - 3.0V
0.5V or less
4 - 14V
0.5V or less
When A/T performs lock-up.
8 - 15V
When A/T does not perform lock- up. Approximately 0V
—
—
—
—
—
—
—
—
—
—
YAT296
AT-46
Terminal
No.
10
11
12
16
17
18
19
20
22
26
27
28
Item
TROUBLE DIAGNOSIS — General Description
TCM Terminals and Reference Value (Cont’d)
Condition
Judgement standard
When turning ignition switch to “ON”. Battery voltage
Power source
Shift solenoid valve A
Shift solenoid valve B
Closed throttle position switch
[in throttle (accelerator) position switch]
Wide open throttle position switch
[in throttle (accelerator) position switch]
A/T mode switch
“SNOW”
Power source
Overrun clutch solenoid valve
Overdrive control switch
Park/neutral “1” position switch
Park/neutral “2” position switch
Ground
When turning ignition switch to
“OFF”.
Approximately 0V
When shift solenoid valve A operates.
(When driving in “D
1
” or “D
4
”.)
When shift solenoid valve A does not operate.
(When driving in “D
2
” or “D
3
”.)
When shift solenoid valve B operates.
(When driving in “D
1
” or “D
2
”.)
When shift solenoid valve B does not operate.
(When driving in “D
3
” or “D
4
”.)
When releasing accelerator pedal after warming up engine.
Battery voltage
Approximately 0V
Battery voltage
Approximately 0V
Battery voltage
When depressing accelerator pedal after warming up engine.
Approximately 0V
When depressing accelerator pedal more than half-way after warming up engine.
Battery voltage
When releasing accelerator pedal after warming up engine.
Approximately 0V
When setting A/T mode switch in
“SNOW” position.
When setting A/T mode switch in other position.
Battery voltage
Approximately 0V
Same as No. 104
When overrun clutch solenoid valve operates.
Battery voltage
When overrun clutch solenoid valve does not operate.
When setting overdrive control switch in “ON” position
When setting overdrive control switch in “OFF” position
When setting selector lever to “1” position.
Approximately 0V
Battery voltage
1V or less
Battery voltage
When setting selector lever to other positions.
When setting selector lever to “2” position.
When setting selector lever to other positions.
—
Approximately 0V
Battery voltage
Approximately 0V
—
AT-47
Terminal
No.
28
29
34
35
36
39
Item
Power source
(Back-up)
TROUBLE DIAGNOSIS — General Description
TCM Terminals and Reference Value (Cont’d)
Revolution sensor
(Measure in AC rang)
Park/neutral “D” position switch
Park/neutral “R” position switch
Park/neutral “N” or “P” position switch
Engine speed signal or
Condition
Judgement standard
When turning ignition switch to
“OFF”.
Battery voltage
When turning ignition switch to “ON”. Battery voltage
When vehicle cruises at 30 km/h (19
MPH).
1V or more
Voltage rises gradually in response to vehicle speed.
0V When vehicle parks.
When setting selector lever to “D” position.
Battery voltage
When setting selector lever to other positions.
When setting selector lever to “R” position.
When setting selector lever to other positions.
When setting selector lever to “N” or
“P” position.
When setting selector lever to other positions.
When engine runs at idle speed.
When engine runs at 2,000 rpm.
Approximately 0V
Battery voltage
Approximately 0V
Battery voltage
Approximately 0V
0.8V
Approximately 2.2V
40 Vehicle speed sensor
When moving vehicle at 2 to 3 km/h
(1 to 2 MPH) for 1 m (3 ft) or more.
Voltage varies between less than 1V and more than 4.5V
42
Throttle (accelerator) position sensor
(Power source)
— 4.5 - 5.5V
42 Ground
43 SPORT indicator lamp
44
A/T mode switch
“SPORT”
47
A/T fluid temperature sensor
—
When setting A/T mode switch in
“SPORT” position.
When setting A/T mode switch in other position.
When setting A/T mode switch in
“SPORT” position.
When setting A/T mode switch in other position.
When ATF temperature is 20°C
(68°F).
When ATF temperature is 80°C
(176°F).
—
Approximately 0V
Battery voltage
Battery voltage
Approximately 0V
Approximately 1.5V
Approximately 0.5V
AT-48
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
A/T
Wiring Diagram — AT — VSSA/T
AT-49
YAT262
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
A/T
Vehicle Speed Sensor
⋅
A/T (Revolution sensor)
DESCRIPTION
The revolution sensor detects the revolution of the out put shaft parking pawl lock gear and emits a pulse signal. The pulse signal is sent to the TCM which converts it into vehicle speed.
YAT336
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: VHCL SPEED SEN
⋅
A/T
: 1st judgement flicker
Malfunction is detected when ...
TCM does not receive the proper voltage signal from the sensor.
Check items
(Possible cause)
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Revolution sensor
SAT252K
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
30 km/h (19 MPH), throttle opening greater than 1/8 of the full throttle position and driving for more than 5 seconds.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
30 km/h (19 MPH), throttle opening greater than 1/8 of the full throttle position and driving for more than 5 seconds.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
SAT806H
AT-50
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
A/T
Vehicle Speed Sensor
⋅
A/T (Revolution sensor)
(Cont’d)
DIAGNOSTIC PROCEDURE
CHECK REVOLUTION SENSOR.
Refer to “COMPONENT INSPECTION” below.
NG
E
Repair or replace revolution sensor.
OK
YAT297
H
CHECK INPUT SIGNAL.
1. Start engine.
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “VHCL/S
SE
⋅
A/T” while driving.
Check the value changes according to driving speed.
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM terminal q and ground while driving.
(Measure in AC range.)
Voltage:
At 0 km/h (0 MPH):
0V
At 30 km/h (19 MPH):
1V or more
(Voltage rises gradually in response to vehicle speed.)
NG
E
Check the following items:
I
Harness for short or open between TCM and revolution sensor (Main harness)
I
Harness for short or open between revolution sensor and ECM (Main harness)
I
Ground circuit for ECM
Refer to EC section
(“TROUBLE DIAGNOSIS
FOR POWER SUPPLY”).
H
OK
Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
NAT218
COMPONENT INSPECTION
Revolution sensor
I
I
Check resistance between terminals q
, q and q
.
Terminal No.
Resistance
500 - 650
Ω
No continuity
No continuity
AT-51
LHD MODELS
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
MTR
Wiring Diagram — AT — VSSMTR
AT-52
YAT263
RHD MODELS
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
MTR
Wiring Diagram — AT — VSSMTR (Cont’d)
AT-53
YAT264
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
MTR
Vehicle Speed Sensor
⋅
MTR
DESCRIPTION
The vehicle speed sensor
⋅
MTR is built into the speedometer assembly. The sensor functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM will then use a signal sent from the vehicle speed sensor
⋅
MTR.
NAT238
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: VHCL SPEED SEN
⋅
MTR
: 2nd judgement flicker
Malfunction is detected when ...
TCM does not receive the proper voltage signal from the sensor.
Check items
(Possible cause)
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Vehicle speed sensor
SAT807H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position and vehicle speed higher than 20 km/h (12 MPH).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position and vehicle speed higher than 20 km/h (12 MPH).
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-54
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN
⋅
MTR
Vehicle Speed Sensor
⋅
MTR (Cont’d)
DIAGNOSTIC PROCEDURE
YAT298
CHECK INPUT SIGNAL.
1. Start engine.
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “VHCL/S
SE
⋅
MTR” while driving.
Check the value changes according to driving speed.
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM terminal q and ground while driving at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or more.
Voltage:
Voltage varies between less than 1V and more than 4.5V.
NG
E
Check the following items:
I
Vehicle speed sensor and ground circuit for vehicle speed sensor
Refer to EL section
(“METERS AND
GAUGES”).
I
Harness for short or open between TCM and vehicle speed sensor
(Main harness)
OK
H
Perform “SELF-DIAGNOSIS CODE CON-
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-55
LHD MODELS
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Wiring Diagram — AT — TPS
AT-56
YAT265
LHD MODELS
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Wiring Diagram — AT — TPS (Cont’d)
AT-57
YAT266
RHD MODELS
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Wiring Diagram — AT — TPS (Cont’d)
AT-58
YAT267
RHD MODELS
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Wiring Diagram — AT — TPS (Cont’d)
AT-59
YAT268
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Throttle (Accelerator) Position Sensor
DESCRIPTION
The throttle (accelerator) position sensor detects the throttle valve position and sends a signal to the TCM.
NAT262
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: THROTTLE POSI SEN
: 3rd judgement flicker
Malfunction is detected when ...
TCM receives an excessively low or high voltage from the sensor.
Check items
(Possible cause)
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Throttle (accelerator) position sensor
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item
Throttle (accelerator) position sensor
Condition
Fully-closed throttle
Fully-open throttle
Specification
Approximately 0.5V
Approximately 4V
SAT808H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 3 seconds.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 3 seconds.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-60
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Throttle (Accelerator) Position Sensor (Cont’d)
DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (selfdiagnostic results) for engine control.
Refer to EC section [“Malfunction Indicator
Lamp (MIL)”, “ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION”].
OK
NG
E
Check throttle (accelerator) position sensor circuit for engine control. Refer to
EC section [“TROUBLE
DIAGNOSIS FOR “THRTL
(ACCEL) POSI SEN”].
YAT299
H
CHECK INPUT SIGNAL.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “THRTL
POS SEN”.
Voltage:
Fully-closed throttle:
Approximately 0.5V
Fully-open throttle:
Approximately 4V
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON” position. (Do not start engine.)
2. Check voltage between TCM terminals q and q while accelerator pedal is depressed slowly.
Voltage:
Fully-closed throttle valve:
Approximately 0.4V
Fully-open throttle valve:
Approximately 4V
(Voltage rises gradually in response to throttle position)
NG
E
Check harness for short or open between ECM and
TCM regarding throttle
(accelerator) position sensor circuit. (Main harness)
H
OK
CHECK THROTTLE (ACCELERATOR)
POSITION SWITCH.
Refer to “CHECK THROTTLE (ACCEL-
ERATOR) POSITION SWITCH”, AT-88.
H
OK
Perform “SELF-DIAGNOSIS CODE CON-
H
OK
INSPECTION END
NG
E
Repair or replace damaged parts.
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-61
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Wiring Diagram — AT — SSV/A
AT-62
YAT280
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Shift Solenoid Valve A
DESCRIPTION
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM in response to signals sent from the park/neutral position switch, vehicle speed and throttle position sensors. Gears will then be shifted to the optimum position.
SAT341H
Gear position
Shift solenoid valve A
Shift solenoid valve B
1
ON
ON
2
OFF
ON
3
OFF
OFF
4
ON
OFF
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: SHIFT SOLENOID/V A
: 4th judgement flicker
Malfunction is detected when ...
TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Check items
(Possible cause)
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Shift solenoid valve A
YAT343
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle in D
1
,
D
2 position.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle in D
1
,
3) Perform self-diagnosis.
D
2 position.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-63
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Shift Solenoid Valve A (Cont’d)
DIAGNOSTIC PROCEDURE
YAT300
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal q and ground.
Resistance: 20 - 40
Ω
OK
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Shift solenoid valve A
Refer to “COMPONENT
INSPECTION” below.
I
Harness of terminal cord assembly for short or open
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal q and TCM harness connector terminal q
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
H
OK
Perform “SELF-DIAGNOSIS CODE CON-
H
OK
INSPECTION END
NG
NG
E
E
Repair open circuit or short to ground or short to power in harness or connector.
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
YAT301
YAT302
COMPONENT INSPECTION
Shift solenoid valve A
I
Resistance check
I
Check resistance between terminal q and ground.
Solenoid valve Terminal No.
Resistance
(Approx.)
Shift solenoid valve A
Ground 20 - 40
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal q and ground.
YAT303
AT-64
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Wiring Diagram — AT — SSV/B
AT-65
YAT281
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Shift Solenoid Valve B
DESCRIPTION
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM in response to signals sent from the park/neutral position switch, vehicle speed and throttle (accelerator) position sensors. Gears will then be shifted to the optimum position.
SAT341H
Gear position
Shift solenoid valve A
Shift solenoid valve B
1
ON
ON
2
OFF
ON
3
OFF
OFF
4
ON
OFF
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: SHIFT SOLENOID/V B
: 5th judgement flicker
Malfunction is detected when ...
TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Check items
(Possible cause)
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Shift solenoid valve B
SAT812H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle in D
1
,
D
2
,
D
3 position.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle in D
1
,
3) Perform self-diagnosis.
D
2
, D
3 position.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-66
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Shift Solenoid Valve B (Cont’d)
DIAGNOSTIC PROCEDURE
YAT304
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal q and ground.
Resistance: 20 - 40
Ω
OK
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Shift solenoid valve B
Refer to “COMPONENT
INSPECTION” below.
I
Harness of terminal cord assembly for short or open
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal q and TCM harness connector terminal q
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
H
OK
Perform “SELF-DIAGNOSIS CODE CON-
H
OK
INSPECTION END
NG
NG
E
E
Repair open circuit or short to ground or short to power in harness or connector.
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
YAT305
YAT306
COMPONENT INSPECTION
Shift solenoid valve B
I
Resistance check
I
Check resistance between terminal q and ground.
Solenoid valve Terminal No.
Resistance
(Approx.)
Shift solenoid valve B
Ground 20 - 40
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal q and ground.
YAT307
AT-67
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
Wiring Diagram — AT — OVRCSV
AT-68
YAT282
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
Overrun Clutch Solenoid Valve
DESCRIPTION
The overrun clutch solenoid valve is activated by the TCM in response to signals sent from the park/neutral position switch, overdrive control switch, vehicle speed and throttle (accelerator) position sensors. The overrun clutch operation will then be controlled.
SAT341H
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: OVERRUN CLUTCH S/V
: 6th judgement flicker
Malfunction is detected when ...
TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Check items
(Possible cause)
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Overrun clutch solenoid valve
YAT351
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-69
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
Overrun Clutch Solenoid Valve (Cont’d)
DIAGNOSTIC PROCEDURE
YAT308
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal q and ground.
Resistance: 20 - 40
Ω
OK
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Overrun clutch solenoid valve
Refer to “COMPONENT
INSPECTION” below.
I
Harness of terminal cord assembly for short or open
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal q and TCM harness connector terminal q
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
H
OK
Perform “SELF-DIAGNOSIS CODE
CONFIRMATION PROCEDURE”, AT-69.
H
OK
INSPECTION END
NG
NG
E
E
Repair open circuit or short to ground or short to power in harness or connector.
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
YAT309
YAT310
COMPONENT INSPECTION
Overrun clutch solenoid valve
I
Resistance check
I
Check resistance between terminal q and ground.
Solenoid valve Terminal No.
Resistance
(Approx.)
Overrun clutch solenoid valve
Ground 20 - 40
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal q and ground.
YAT311
AT-70
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Wiring Diagram — AT — TCV
AT-71
YAT277
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Torque Converter Clutch Solenoid Valve
DESCRIPTION
The torque converter clutch solenoid valve is activated, with the gear in D
4
, by the TCM in response to signals sent from the vehicle speed and throttle (accelerator) position sensors. Torque converter clutch piston operation will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
SAT342HA
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: T/C CLUTCH SOL/V
: 7th judgement flicker
Malfunction is detected when ...
TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Check items
(Possible cause)
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
T/C clutch solenoid valve
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item Condition
Torque converter clutch solenoid valve duty
Lock-up “OFF”
"
Lock-up “ON”
Specification
Approximately
4%
"
Approximately
94%
SAT818H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle in D position.
1
, D
2
, D
3
, D
4
, D
4 lock-up
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle in D
1 position.
,
3) Perform self-diagnosis.
D
2
, D
3
, D
4
, D
4 lock-up
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-72
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Torque Converter Clutch Solenoid Valve
(Cont’d)
DIAGNOSTIC PROCEDURE
YAT312
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal q and ground.
Resistance: 10 - 20
Ω
OK
NG
E
1. Remove oil pan. Refer
2. Check the following items:
I
Torque converter clutch solenoid valve
Refer to “COMPONENT
INSPECTION” on next page.
I
Harness of terminal cord assembly for short or open
YAT313
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal q and TCM harness connector terminal
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK
H
Perform “SELF-DIAGNOSIS CODE CON-
OK
H
INSPECTION END
NG
E
Repair open circuit or short to ground or short to power in harness or connector.
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-73
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Torque Converter Clutch Solenoid Valve
(Cont’d)
COMPONENT INSPECTION
YAT314
Torque converter clutch solenoid valve
I
Resistance check
I
Check resistance between terminal q and ground.
Solenoid valve Terminal No.
Resistance
(Approx.)
Torque converter clutch solenoid valve
Ground 10 - 20
Ω
YAT315
Operation check
I
Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal q and ground.
AT-74
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
Wiring Diagram — AT — BA/FTS
AT-75
YAT283
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM Power
Source
DESCRIPTION
The A/T fluid temperature sensor detects the A/T fluid temperature and sends a signal to the TCM.
SAT342HA
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...
: BATT/FLUID TEMP SEN
: 8th judgement flicker
TCM receives an excessively low or high voltage from the sensor.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item Condition
A/T fluid temperature sensor
Cold [20°C (68°F)]
"
Hot [80°C (176°F)]
Check items
(Possible cause)
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
A/T fluid temperature sensor
Specification
Approximately
1.5V
"
Approximately
0.5V
SAT821H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the full open position, engine speed higher than 450 rpm and driving for more than 10 minutes.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the full open position, engine speed higher than 450 rpm and driving for more than 10 minutes.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-76
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM Power
Source (Cont’d)
DIAGNOSTIC PROCEDURE
YAT316
CHECK TCM POWER SOURCE.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals
, q and ground.
Battery voltage should exist.
OK
NG
E
Check the following items:
I
Harness for short or open between ignition switch and TCM (Main harness)
I
Ignition switch and fuse
Refer to EL section
(“POWER SUPPLY
ROUTING”).
YAT317
H
CHECK A/T FLUID TEMPERATURE
SENSOR WITH TERMINAL CORD
ASSEMBLY.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminals q and q when A/T is cold.
Resistance:
Cold [20°C (68°F)]
Approximately 2.5 k
Ω
4. Reinstall any part removed.
H
OK
NG
E
1. Remove oil pan.
2. Check the following items:
I
A/T fluid temperature sensor
Refer to “COMPONENT
INSPECTION” on next page.
I
Harness of terminal cord assembly for short or open
(Go to next page.)
AT-77
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM Power
Source (Cont’d)
YAT318
H
CHECK INPUT SIGNAL OF A/T FLUID
TEMPERATURE SENSOR.
1. Start engine.
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “FLUID
TEMP SE”.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately
1.5V
→
0.5V
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM terminal q and ground while warming up A/T.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately
1.5V
→
0.5V
OK
H
Perform “SELF-DIAGNOSIS CODE CON-
H
OK
INSPECTION END
NG
E
Check the following item:
I
Harness for short or open between TCM and terminal cord assembly
(Main harness)
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
YAT319
COMPONENT INSPECTION
A/T fluid temperature sensor
I
I
Check resistance between terminals q temperature as shown at left.
and q while changing
Temperature °C (°F)
20 (68)
80 (176)
Resistance
Approximately 2.5 k
Ω
Approximately 0.3 k
Ω
AT-78
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
Wiring Diagram — AT — ENGSS
AT-79
YAT271
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
Engine Speed Signal
DESCRIPTION
The engine speed signal is sent from the ECM to the TCM.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
:
ENGINE SPEED SIG
: 9th judgement flicker
Malfunction is detected when ...
TCM does not receive the proper voltage signal from ECM.
Check items
(Possible cause)
I
Harness or connectors
(The sensor circuit is open or shorted.)
SAT823H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the full throttle position and driving for more than 10 seconds.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the full throttle position and driving for more than 10 seconds.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-80
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
Engine Speed Signal (Cont’d)
DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (selfdiagnostic results) for engine control.
Check ignition signal circuit condition.
OK
NG
E
Check ignition signal circuit for engine control. Refer to
EC section [TROUBLE
DIAGNOSIS FOR “IGN
SIGNAL-PRIMARY” (DTC
21)].
YAT320
H
CHECK INPUT SIGNAL.
1. Start engine.
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out the value of “ENGINE
SPEED”.
Check engine speed changes according to throttle position.
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM terminal q and ground.
Voltage (Idle speed):
Approximately 0.8V
Voltage (2,000 rpm):
Approximately 2.2V
NG
E
Check the following items:
I
Harness for short or open between TCM and
ECM
I
Resistor
Refer to EC section
[TROUBLE DIAGNOSIS
FOR “IGN SIGNAL-PRI-
MARY” (DTC 21)].
OK
H
Perform “SELF-DIAGNOSIS CODE CON-
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-81
LHD MODELS
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Wiring Diagram — AT — LPSV
AT-82
YAT278
RHD MODELS
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Wiring Diagram — AT — LPSV (Cont’d)
AT-83
YAT279
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve
DESCRIPTION
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.
SAT341H
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
: LINE PRESSURE S/V
: 10th judgement flicker
Malfunction is detected when ...
TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Check items
(Possible cause)
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Line pressure solenoid valve
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item
Line pressure solenoid valve duty
Condition
Low line-pressure
(Small throttle opening)
"
High line-pressure
(Large throttle opening)
Specification
Approximately
29%
"
Approximately
94%
SAT824H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1) Start engine.
2) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3) With brake pedal depressed, shift the lever from “P”
,
“N” , “D” , “N” , “P” positions.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) With brake pedal depressed, shift the lever from “P”
,
“N”
,
“D”
,
“N”
,
“P” positions.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
AT-84
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve (Cont’d)
DIAGNOSTIC PROCEDURE
YAT321
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal q and ground.
Resistance: 2.5 - 5
Ω
OK
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Line pressure solenoid valve
Refer to “COMPO-
NENT INSPECTION” on next page.
I
Harness of terminal cord assembly for short or open
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal q and TCM harness connector terminal
.
Resistance: 11.2 - 12.8
Ω
OK
NG
E
Check the following items:
I
Dropping resistor
Refer to “COMPONENT
INSPECTION” on next page.
I
Harness for short or open between TCM terminal q and terminal cord assembly (Main harness)
YAT322
H
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal q and TCM harness connector terminal
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
3. Reinstall any part removed.
OK
H
Perform “SELF-DIAGNOSIS CODE CON-
OK
H
INSPECTION END
NG
E
Repair open circuit or short to ground or short to power in harness or connector.
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-85
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve (Cont’d)
COMPONENT INSPECTION
Line pressure solenoid valve
I
Resistance check
I
Check resistance between terminal q and ground.
Solenoid valve Terminal No.
Resistance
(Approx.)
Line pressure solenoid valve
Ground 2.5 - 5
Ω
YAT323
Operation check
I
Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal q and ground.
YAT324
Dropping resistor
I
Check resistance between terminals q
Resistance: 11.2 - 12.8
Ω and q
.
YAT325
AT-86
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Wiring Diagram — AT — PNP/SW
AT-87
YAT269
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
YAT336
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
DESCRIPTION
I
Park/neutral position switch
Detects the selector lever position and sends a signal to the
TCM.
I
Overdrive control switch
Detects the overdrive control switch position (ON or OFF) and sends a signal to the TCM.
I
Throttle (accelerator) position switch
Consists of a wide open throttle position switch and a closed throttle (accelerator) position switch.
The wide open throttle position switch sends a signal to the
TCM when the throttle valve is open at least 1/2 of the full throttle position. The closed throttle position switch sends a signal to the TCM when the throttle valve is fully closed.
NAT234
NAT261
NAT306
NAT262
AT-88
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
(Cont’d)
DIAGNOSTIC PROCEDURE
YAT326
CHECK PARK/NEUTRAL POSITION
SWITCH CIRCUIT.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out “R, N, D, 2 and 1 position switches” moving selector lever to each position.
Check the signal of the selector lever position is indicated properly.
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON” position. (Do not start engine.)
2. Check voltage between TCM terminals q
, q
, q
, q
, q and ground while moving selector lever through each position.
Voltage:
B: Battery voltage
0: 0V
NG
E
Check the following items:
I
Park/neutral position switch
Refer to “COMPONENT
I
Harness for short or open between ignition switch and park/neutral position switch (Main harness)
I
Harness for short or open between park/ neutral position switch and TCM (Main harness)
I
Diode
Terminal No.
Lever position
P, N
R
D
2
1
0
0
B
0
0
0
0
0
B
0
B
0
0
0
0
0
B
0
0
0
0
0
0
0
B
H
OK
(Go to next page.)
AT-89
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
(Cont’d)
YAT327
H
CHECK OVERDRIVE CONTROL
SWITCH CIRCUIT.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out “OVERDRIVE SWITCH”.
Check the signal of the overdrive control switch is indicated properly.
(Overdrive control switch “ON” displayed on CONSULT-II means overdrive “OFF”.)
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminal q and ground when overdrive control switch is “ON” and
“OFF”.
NG
E
Check the following items.
I
Overdrive control switch
Refer to “COMPONENT
I
Harness for short or open between TCM and overdrive control switch
(Main harness)
I
Harness for short or open of ground circuit for overdrive control switch
(Main harness)
Switch position
ON
OFF
Voltage
Battery voltage
1V or less
H
OK
(Go to next page.)
AT-90
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
(Cont’d)
YAT328
H
CHECK THROTTLE (ACCELERATOR)
POSITION SWITCH CIRCUIT.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “ECU INPUT SIGNALS” in
Data Monitor.
3. Read out “CLOSED THL/SW” and
“W/O THRL/P-SW” depressing and releasing accelerator pedal.
Check the signal of throttle (accelerator) position switch is indicated properly.
NG
E
Check the following items:
I
Throttle (accelerator) position switch
Refer to “COMPONENT
I
Harness for short or open between ignition switch and throttle
(accelerator) position switch (Main harness)
I
Harness for short or open between throttle
(accelerator) position switch and TCM (Main harness)
Accelerator pedal condition
Data monitor
CLOSED
THL/SW
W/O THRL/
P-SW
ON OFF Released
Fully depressed
OFF ON
YAT329
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals q
, q and ground while depressing, and releasing accelerator pedal slowly. (after warming up engine)
Accelerator pedal condition
Released
Fully depressed
Terminal
No.
q
Battery voltage
Voltage
Terminal No.
q
1V or less
1V or less
Battery voltage
OK
H
Perform “DIAGNOSTIC PROCEDURE”,
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-91
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
(Cont’d)
COMPONENT INSPECTION
Overdrive control switch
I
Check continuity between terminals q and q
.
Switch position
ON
OFF
Continuity
No
Yes
NAT265
A/T mode switch
I
Check continuity between terminals q
, ( q
) and q
.
Switch position Terminal No.
*
S
ON
OFF
ON
OFF
— q
— q
Continuity
Yes
No
Yes
No
NAT266
SAT517GB
Park/neutral position switch
1. Check continuity between terminals q terminals q and q
, q
, q
, q
, q and q
, q and between while moving manual shaft through each position.
Lever position
P
R
N
D
2
1
— q
— q
— q
— q
— q
— q
Terminal No.
— q
— q
2. If NG, check again with manual control linkage disconnected from manual shaft of A/T assembly. Refer to step 1.
3. If OK on step 2, adjust manual control linkage. Refer to AT-112.
NAT267
4. If NG on step 2, remove park/neutral position switch from A/T and check continuity of park/neutral position switch terminals.
Refer to step 1.
5. If OK on step 4, adjust park/neutral position switch. Refer to
6. If NG on step 4, replace park/neutral position switch.
NAT268
AT-92
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
(Cont’d)
Throttle (accelerator) position switch
Closed throttle position switch (idle position)
I
Check continuity between terminals q and q
.
YAT330
Accelerator pedal condition Continuity
Released Yes
Depressed No
I
To adjust closed throttle (accelerator) position switch, refer to
EC section (“Basic Inspection”, “TROUBLE DIAGNOSIS —
Basic Inspection”).
Wide open throttle position switch
I
Check continuity between terminals q and q
.
Accelerator pedal condition
Released
Depressed
Continuity
No
Yes
YAT331
YAT335
A/T fluid temperature switch
1. Make sure the A/T fluid warning lamp lights when the key is inserted and turned to “ON”.
2. Make sure the A/T fluid warning lamp goes off when turning the ignition switch to “ON”.
3. For removal, refer to AT-113.
4. Check resistance between terminal q ing temperature as shown at left.
and ground while chang-
Temperature °C (°F)
140 (284) or more
140 (284) or less
Continuity
Yes
No
AT-93
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
1. SPORT Indicator Lamp Does Not Come On
SYMPTOM:
POWER indicator lamp does not come on for about 2 seconds when turning ignition switch to “ON”.
YAT332
YAT333
YAT334
CHECK TCM POWER SOURCE.
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals q
, q and ground.
Battery voltage should exist.
OK
NG
E
Check the following items:
I
Harness for short or open between ignition switch and TCM (Main harness)
I
Ignition switch and fuse
Refer to EL section
(“POWER SUPPLY
ROUTING”).
H
CHECK TCM GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between TCM terminals q
, q and ground.
Resistance:
Approximately 0
Ω
If OK, check harness for short to ground and short to power.
OK
H
CHECK LAMP CIRCUIT.
1. Turn ignition switch to “ON” position.
2. Set overdrive control, A/T check or power switch to “ON” position.
3. Check voltage between TCM terminal q and ground.
Voltage: Battery voltage
4. Reinstall any part removed.
OK
Check again.
OK
H
INSPECTION END
NG
E
Repair open circuit or short to ground or short to power in harness or connector.
NG
E
Check the following items:
I
Fuse (7.5A)
I
SPORT indicator lamp
Refer to EL section
(“WARNING LAMPS”).
I
Harness for short or open between ignition switch and SPORT indicator lamp (Main harness)
Refer to EL section
(“POWER SUPPLY
ROUTING”).
I
Harness for short or open between SPORT indicator lamp and TCM
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-94
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
NAT309
2. SPORT or SNOW Indicator Lamp Does Not
Come On
SYMPTOM:
SPORT or SNOW indicator lamp does not come on when turning A/T mode switch to the appropriate position.
Is 1. O/D OFF, SPORT or A/T CHECK
Indicator Lamp Does Not Come On OK?
No
E
Go to 1. SPORT Indicator
Lamp Does Not Come On,
Yes
H
Check the following items:
I
A/T mode switch
I
SNOW indicator lamp
I
Harness continuity between ignition switch and A/T mode switch
I
Harness continuity between A/T mode switch and TCM
NG
E
Repair or replace damaged parts.
NAT232
3. O/D OFF Indicator Lamp Does Not Come On
SYMPTOM:
O/D OFF indicator lamp does not come on when setting overdrive control switch to “OFF” position.
Check the following items:
I
Overdrive control switch
I
O/D OFF indicator lamp
I
Harness continuity between ignition switch and O/D OFF indicator lamp
NG
E
Repair or replace damaged parts.
AT-95
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
4. SPORT Indicator Lamp Does Not Come On
SYMPTOM:
SPORT indicator lamp does not come on for about 3 seconds when depressing and releasing accelerator pedal fully.
NAT309
Does self-diagnosis show damage to throttle (accelerator) position sensor circuit?
Yes
YAT337
No
E
Check throttle (accelerator) position sensor. Refer to
H
Check throttle (accelerator) position sensor. — Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN” (DTC 43)].
OK
H
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
NG
E
Repair or replace throttle
(accelerator) position sensor.
NAT262
AT-96
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
5. Engine Cannot Be Started In “P” and “N”
Position
SYMPTOM:
I
Engine cannot be started with selector lever in “P” or “N” position.
I
Engine can be started with selector lever in “D”, “2”, “1” or “R” position.
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position
NAT275
Does self-diagnosis show damage to park/neutral position switch circuit?
No
H
Check for short or open of park/neutral position switch 2-pin connector. Refer to
H
OK
Check starting system. Refer to EL section (“System Description”, “STARTING
SYSTEM”).
H
OK
INSPECTION END
NG
E
Repair or replace park/ neutral position switch.
NG
E
Repair or replace damaged parts.
SAT133B
6. In “P” Position, Vehicle Moves Forward Or
Backward When Pushed
SYMPTOM:
Vehicle moves when it is pushed forward or backward with selector lever in “P” position.
Check parking pawl components. Refer to
NG
E
Repair or replace damaged parts.
H
OK
INSPECTION END
AT-97
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
7. In “N” Position, Vehicle Moves
SYMPTOM:
Vehicle moves forward or backward when selecting “N” position.
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position
Does self-diagnosis show damage to park/neutral position switch circuit?
No
H
Check control linkage. Refer to AT-115.
OK
NAT276
H
Check A/T fluid level again.
OK
H
1. Remove oil pan.
2. Check A/T fluid condition.
OK
NG
E
Adjust control linkage.
NG
E
Refill ATF.
NG
E
1. Disassemble A/T.
2. Check the following items:
I
Forward clutch assembly
I
Overrun clutch assembly
I
Reverse clutch assembly
SAT638A
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
SAT171B
AT-98
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
8. Large Shock. “N”
→
“R” Position
SYMPTOM:
There is large shock when changing from “N” to “R” position.
SAT831HA
Does self-diagnosis show damage to line pressure solenoid valve or throttle (accelerator) position sensor, A/T fluid temperature sensor circuit?
No
Yes
E
Check damaged circuit.
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN” (DTC 43)].
OK
NG
E
Repair or replace throttle
(accelerator) position sensor.
NAT262
Check line pressure at idle with selector lever in “D” position. Refer to “Line Pres-
H
OK
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
SAT494G
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-99
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
9. Vehicle Does Not Creep Backward In “R”
Position
SYMPTOM:
Vehicle does not creep backward when selecting “R” position.
SAT638A
SAT493G
SAT494G
SAT171B
Check A/T fluid level again.
OK
NG
E
Refill ATF.
H
Check stall revolution with selector lever in “1” and “R” positions.
OK
OK in “1” position
H
NG in “R” position
1. Remove control valve
2. Check the following items:
I
Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
I
Oil pump assembly
I
Torque converter
I
Reverse clutch assembly
I
High clutch assembly
NG in both “1” and “R” positions
E
H
1. Remove control valve
2. Check the following items:
I
Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
I
Oil pump assembly
I
Torque converter
I
Reverse clutch assembly
I
High clutch assembly
I
Low & reverse brake assembly
I
Low one-way clutch
H
Check line pressure at idle with selector lever in “R” position. Refer to
H
1. Remove oil pan.
2. Check A/T fluid condition.
H
NG
OK
OK
NG
E
1. Remove control valve
2. Check the following items:
I
Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
I
Oil pump assembly
H
Check again.
H
OK
INSPECTION END
NG
E
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-100
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
10. Vehicle Does Not Creep Forward In “D”, “2”
Or “1” Position
SYMPTOM:
Vehicle does not creep forward when selecting “D”, “2” or “1” position.
SAT638A
Check A/T fluid level again.
OK
NG
E
Refill ATF.
SAT493G
SAT494G
SAT171B
H
Check stall revolution with selector lever in
“D” position. Refer to “STALL TEST”, AT-27.
OK
H
Check line pressure at idle with selector lever in “D” position. Refer to “Line Pressure
OK NG
H
1. Remove control valve assembly.
2. Check the following items:
I
Valves to control line pressure
(Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
I
Oil pump assembly
NG
E
H
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
I
Oil pump assembly
I
Forward clutch assembly
I
Forward one-way clutch
I
Low one-way clutch
I
Low & reverse brake assembly
I
Torque converter
NG
E q
H
1. Remove oil pan.
2. Check A/T fluid condition.
OK
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-101
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT832H
NAT262
SAT494G
SAT171B
11. Vehicle Cannot Be Started From D
1
SYMPTOM:
Vehicle cannot be started from D
1 on Cruise test — Part 1.
Is 9. Vehicle Does Not Creep Backward In
“R” Position OK?
Yes
No
E
Go to 9. Vehicle Does Not
Creep Backward In “R”
H
Does self-diagnosis show damage to vehicle speed sensor
⋅
A/T (revolution sensor), shift solenoid valve A, B or vehicle speed sensor
⋅
MTR after cruise test?
Yes
E
Check damaged circuit.
No
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN”].
NG
E
Repair or replace throttle
(accelerator) position sensor.
OK
H
Check line pressure at stall point with selector lever in “D” position. Refer to
OK
H
1. Remove oil pan.
2. Check A/T fluid condition.
H
OK
1. Remove control valve assembly. Refer
2. Check the following items:
I
Shift valve A
I
Shift valve B
I
Shift solenoid valve A
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
F
H
OK
Check again.
OK
H
INSPECTION END
NG
E
NG
E
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Shift valve A
I
Shift valve B
I
Shift solenoid valve A
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Forward clutch assembly
I
Forward one-way clutch
I
Low one-way clutch
I
High clutch assembly
I
Torque converter
I
Oil pump assembly
OK
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-102
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
NAT262
SAT171B
12. A/T Does Not Shift: D
1
Kickdown: D
4
→
D
2
SYMPTOM:
→
D
2
Or Does Not
A/T does not shift from D
1
A/T does not shift from D
4 to D to D
2
2 at the specified speed.
when depressing accelerator pedal fully at the specified speed.
Are 10. Vehicle Does Not Creep Forward
In “D”, “2” Or “1” Position and 11. Vehicle
Cannot Be Started From D
1
OK?
Yes
H
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
No
E
Go to 10. Vehicle Does
Not Creep Forward In “D”,
“2” Or “1” Position and 11.
Vehicle Cannot Be Started
From D
1
Yes
E
Check park/neutral position
Does self-diagnosis show damage to park/neutral position switch circuit?
H
No
Check vehicle speed sensor
⋅
A/T (revolution sensor) and vehicle speed sensor
⋅
OK
NG
E
Repair or replace vehicle speed sensor
⋅
A/T (revolution sensor) and vehicle speed sensor
⋅
MTR. Refer
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN” (DTC 43)].
H
OK
1. Remove oil pan.
2. Check A/T fluid condition.
OK
H
1. Remove control valve. Refer to AT-113.
2. Check the following items:
I
Shift valve A
I
Shift solenoid valve A
I
Pilot valve
I
Pilot filter
F
OK
Check again.
OK
H
INSPECTION END
NG
NG
OK
E
E
Repair or replace throttle
(accelerator) position sensor.
1. Remove control valve.
2. Check the following items:
I
Shift valve A
I
Shift solenoid valve A
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Servo piston assembly
I
Brake band
I
Oil pump assembly
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-103
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
13. A/T Does Not Shift: D
2
→
D
3
SYMPTOM:
A/T does not shift from D
2 to D
3 at the specified speed.
Are 10. Vehicle Does Not Creep Forward
In “D”, “2” Or “1” Position and 11. Vehicle
Cannot Be Started From D
1
OK?
Yes
No
E
Go to 10. Vehicle Does
Not Creep Forward In “D”,
“2” Or “1” Position and 11.
Vehicle Cannot Be Started
From D
1
H
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position
NAT262
SAT171B
Does self-diagnosis show damage to park/neutral position switch circuit?
No
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN”].
OK
H
1. Remove oil pan.
2. Check A/T fluid condition.
H
OK
1. Remove control valve assembly. Refer
2. Check the following items:
I
Shift valve B
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
F
OK
NG
E
Repair or replace throttle
(accelerator) position sensor.
NG
E
OK
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Shift valve B
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Servo piston assembly
I
High clutch assembly
I
Oil pump assembly
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-104
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT833HA
NAT262
SAT171B
14. A/T Does Not Shift: D
3
→
D
4
SYMPTOM:
I
A/T does not shift from D
3
I
A/T must be warm before D
3 to D
4 to D at the specified speed.
4 shift will occur.
Are 10. Vehicle Does Not Creep Forward
In “D”, “2” Or “1” Position and 11. Vehicle
Cannot Be Started From D
1
OK?
Yes
No
E
Go to 10. Vehicle Does
Not Creep Forward In “D”,
“2” Or “1” Position and 11.
Vehicle Cannot Be Started
From D
1
H
Does self-diagnosis, after cruise test, show damage to any of the following circuits?
I
Park/neutral position switch
I
Overdrive control switch
I
A/T fluid temperature sensor
I
Vehicle speed sensor
⋅
A/T (Revolution sensor)
I
Shift solenoid valve A or B
I
Vehicle speed sensor
⋅
MTR
Yes
E
Check damaged circuit.
H
No
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN”].
NG
E
Repair or replace throttle
(accelerator) position sensor.
H
OK
1. Remove oil pan.
2. Check A/T fluid condition.
OK
H
1. Remove control valve assembly. Refer
2. Check the following items:
I
Shift valve B
I
Overrun clutch control valve
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
OK
F
NG
E
OK
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Shift valve B
I
Overrun clutch control valve
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Servo piston assembly
I
Brake band
I
Torque converter
I
Oil pump assembly
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-105
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
15. A/T Does Not Perform Lock-up
SYMPTOM:
A/T does not perform lock-up at the specified speed.
Does self-diagnosis show damage to torque converter clutch solenoid valve after cruise test?
No
Yes
E
Check torque converter clutch solenoid valve.
SAT844H
NAT262
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN”].
OK
H
1. Remove control valve. Refer to AT-113.
2. Check following items:
I
Torque converter clutch control valve
I
Torque converter relief valve
I
Torque converter clutch solenoid valve
I
Pilot valve
I
Pilot filter
OK
NG
E
Repair or replace throttle
(accelerator) position sensor.
NG
E
Repair or replace damaged parts.
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-106
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
16. A/T Does Not Hold Lock-up Condition
SYMPTOM:
A/T does not hold lock-up condition for more than 36 seconds.
SAT835H
SAT171B
Does self-diagnosis show damage to engine speed signal circuit after cruise test?
No
H
1. Remove oil pan.
2. Check A/T fluid condition.
H
OK
1. Remove control valve assembly. Refer
2. Check the following items:
I
Torque converter clutch control valve
I
Pilot valve
I
Pilot filter
F
H
OK
Check again.
OK
H
INSPECTION END
Yes
E
Check engine speed sig-
NG
E
OK
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Torque converter clutch control valve
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check torque converter and oil pump assembly.
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
SAT146BA
17. Lock-up Is Not Released
SYMPTOM:
Lock-up is not released when accelerator pedal is released.
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to closed throttle position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check closed throttle posi-
Does self-diagnosis show damage to closed throttle position switch circuit?
H
No
Check again.
H
OK
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-107
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
18. Engine Speed Does Not Return To Idle
(Light Braking D
4
→
D
3
)
SYMPTOM:
I
Engine speed does not smoothly return to idle when A/T shifts from D
4 to D
3
.
I
Vehicle does not decelerate by engine brake when turning overdrive control switch OFF.
I
Vehicle does not decelerate by engine brake when shifting
A/T from “D” to “2” position.
YAT338
NAT262
SAT171B
Does self-diagnosis show damage to overrun clutch solenoid valve circuit after cruise test?
No
H
Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE
DIAGNOSIS FOR “THROTTLE (ACCEL)
POSI SEN”].
OK
H
1. Remove oil pan.
2. Check A/T fluid condition.
OK
H
1. Remove control valve assembly. Refer
2. Check the following items:
I
Overrun clutch control valve
I
Overrun clutch reducing valve
I
Overrun clutch solenoid valve
OK
F
Yes
E
Check overrun clutch sole-
NG
E
Repair or replace throttle
(accelerator) position sensor.
NG
E
OK
1. Remove control valve assembly. Refer to
2. Check the following items:
I
Overrun clutch control valve
I
Overrun clutch reducing valve
I
Overrun clutch solenoid valve
3. Disassemble A/T.
4. Check the following items:
I
Overrun clutch assembly
I
Oil pump assembly
Check again.
OK
H
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-108
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
19. Vehicle Does Not Start From D
1
SYMPTOM:
Vehicle does not start from D
1 on Cruise test — Part 2.
SAT832H
Does self-diagnosis show damage to vehicle speed sensor
⋅
A/T (revolution sensor), shift solenoid valve A, B or vehicle speed sensor
⋅
MTR after cruise test?
No
Yes
E
Check damaged circuit.
Check again.
OK
H
Go to 11. Vehicle Cannot Be Started From
D
1
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-109
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
20. A/T Does Not Shift: D
2
→
D
1
When
Depressing Accelerator Pedal
SYMPTOM:
A/T does not shift from D
2 to D
1 when depressing accelerator pedal fully at the specified speed.
Are 9. Vehicle Does Not Creep
Backward In “R” Position and 10.
Vehicle Does Not Creep Forward In
“D”, “2” Or “1” Position OK?
No
E
Go to 9. Vehicle Does Not
Creep Backward In “R” Position and 10. Vehicle Does Not Creep
Forward In “D”, “2” Or “1”
H
Yes
Does “ECU INPUT SIGNAL” show damage to park/neutral position switch circuit?
----------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position
NAT262
SAT171B
Does self-diagnosis show damage to park/neutral position switch circuit?
H
No
Check vehicle speed sensor
⋅
A/T
(revolution sensor) and vehicle speed sensor
⋅
H
OK
Check throttle (accelerator) position sensor. Refer to EC section
[TROUBLE DIAGNOSIS FOR
“THROTTLE (ACCEL) POSI SEN”
(DTC 43)].
H
OK
1. Remove oil pan.
2. Check A/T fluid condition.
H
OK
1. Remove control valve. Refer to
2. Check the following items:
I
Shift valve A
I
Shift solenoid valve A
I
Pilot valve
I
Pilot filter
H
F
OK
Check again.
OK
H
INSPECTION END
NG
E
Repair or replace vehicle speed sensor
⋅
A/T (revolution sensor) and vehicle speed sensor
⋅
MTR.
NG
E
Repair or replace throttle (accelerator) position sensor.
NG
E
OK
1. Remove control valve. Refer
2. Check the following items:
I
Shift valve A
I
Shift solenoid valve A
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Servo piston assembly
I
Brake band
I
Oil pump assembly
NG
E
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
AT-110
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
21. A/T Does Not Shift: D
4
→
D
3
, When
Overdrive Control Switch “ON”
→
“OFF”
SYMPTOM:
A/T does not shift from D
4 to D control switch to “OFF” position.
3 when changing overdrive
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to overdrive control switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check overdrive control switch circuit. Refer to
Does self-diagnosis show damage to overdrive control switch circuit?
No
H
Go to 13. A/T Does Not Shift:
D
2
, D
3
SAT146BA
22. A/T Does Not Shift: D
3
Lever “D”
→
“2” Position
→
2
2
, When Selector
SYMPTOM:
A/T does not shift from D
3 from “D” to “2” position.
to 2
2 when changing selector lever
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position switch circuit. Refer to
Does self-diagnosis show damage to park/neutral position switch circuit?
No
H
Go to 12. A/T Does Not Shift: D
1
Does Not Kickdown: D
4
, D
2
, D
2
Or
AT-111
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
SAT146BA
23. A/T Does Not Shift: 2
2
Lever “2”
→
“1” Position
→
1
1
, When Selector
SYMPTOM:
A/T does not shift from 2
2 from “2” to “1” position.
to 1
1 when changing selector lever
Does “ECU INPUT SIGNALS” in
Data Monitor show damage to park/ neutral position switch circuit?
----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------
Yes
E
Check park/neutral position switch circuit. Refer to
Does self-diagnosis show damage to park/neutral position switch circuit?
H
No
Check again.
H
OK
INSPECTION END
NG
E
1. Perform TCM input/ output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
SAT778B
24. Vehicle Does Not Decelerate By Engine
Brake
SYMPTOM:
Vehicle does not decelerate by engine brake when shifting from 2
2
(1
2
) to 1
1
.
Is 9. Vehicle Does Not Creep Backward In
“R” Position OK?
No
E
Go to 9. Vehicle Does Not
Creep Backward In “R”
Yes
H
Go to 18. Engine Speed Does Not Return
To Idle (Light Braking D
4
,
D
3
AT-112
ON-VEHICLE SERVICE
Control Valve Assembly and Accumulators
REMOVAL
1. Remove exhaust front tube.
2. Remove oil pan and gasket and drain ATF.
NAT277
3. Remove A/T fluid temperature sensor if necessary.
4. Remove oil strainer.
SAT073BA
5. Remove control valve assembly by removing fixing bolts and disconnecting harness connector.
Bolt length and location
Bolt symbol
mm (in)
33 (1.30)
45 (1.77)
6. Remove solenoids and valves from valve body if necessary.
7. Remove terminal cord assembly if necessary.
SAT353B
8. Remove accumulator q
, q
, q air if necessary.
I
Hold each piston with rag.
9. Reinstall any part removed.
I
Always use new sealing parts.
and q by applying compressed
SAT074BA
AT-113
NAT278
ON-VEHICLE SERVICE
Revolution Sensor Replacement
1. Remove rear engine mounting member from side member while supporting A/T with transfer case with jack. Tighten rear engine mounting member to the specified torque. Refer to EM section (“ENGINE REMOVAL”).
2. Lower A/T with transfer case as much as possible.
3. Remove revolution sensor from A/T.
4. Reinstall any part removed.
I
Always use new sealing parts.
Rear Oil Seal Replacement
1. Remove transfer case from vehicle. Refer to TF section
(“Removal”, “REMOVAL AND INSTALLATION”).
2. Remove rear oil seal.
3. Install rear oil seal.
I
Apply ATF before installing.
4. Reinstall any part removed.
NAT279
Parking Components Inspection
1. Remove propeller shaft. Refer to PD section (“Removal”, “PRO-
PELLER SHAFT”).
2. Remove transfer case from vehicle. Refer to TF section
(“Removal”, “REMOVAL AND INSTALLATION”).
3. Remove manual control linkage bracket from adapter case.
NAT280
4. Support A/T assembly with a jack.
5. Remove adapter case from transmission case.
6. Replace parking components if necessary.
7. Reinstall any part removed.
I
Always use new sealing parts.
SAT078B
NAT290
Park/neutral Position Switch Adjustment
1. Remove manual control linkage from manual shaft of A/T assembly.
2. Set manual shaft of A/T assembly in “N” position.
3. Loosen park/neutral position switch fixing bolts.
4. Insert pin into adjustment holes in both park/neutral position switch and manual shaft of A/T assembly as near vertical as possible.
5. Reinstall any part removed.
6. Check continuity of park/neutral position switch. Refer to “Com-
AT-114
ON-VEHICLE SERVICE
Manual Control Linkage Adjustment
Move selector lever from “P” position to “1” position. You should be able to feel the detents in each position.
If the detents cannot be felt or the pointer indicating the position is improperly aligned, the linkage needs adjustment.
1. Place selector lever in “P” position.
2. Loosen lock nuts.
NAT282
3. Tighten turn buckle until aligns with inner cable, pulling selector lever toward “R” position side without pushing button.
4. Back off turn buckle 1 turn and tighten lock nuts to the specified torque.
Lock nut
: 4.4 - 5.9 N
⋅
m
(0.45 - 0.60 kg-m, 39.1 - 52.1 in-lb)
5. Move selector lever from “P” position to “1” position. Make sure that selector lever can move smoothly.
NAT283
AT-115
REMOVAL AND INSTALLATION
NAT284
Removal
CAUTION:
When removing the A/T assembly from engine, first remove the crankshaft position sensor (OBD) from the A/T assembly upper side.
Be careful not to damage sensor edge.
1. Remove battery negative terminal.
2. Remove exhaust front tube.
3. Remove fluid charging pipe from A/T assembly.
4. Remove oil cooler pipe from A/T assembly.
5. Plug up openings such as the fluid charging pipe hole, etc.
6. Remove propeller shaft. Refer to PD section (“Removal”, “PRO-
PELLER SHAFT”).
7. Remove transfer control linkage from transfer. Refer to TF section (“Removal”, “REMOVAL AND INSTALLATION”).
8. Remove A/T control cable from A/T assembly.
9. Disconnect A/T and speedometer sensor harness connectors.
AT-116
REMOVAL AND INSTALLATION
Removal (Cont’d)
10. Remove starter motor.
11. Remove gusset and rear plate cover securing engine to A/T assembly.
12. Remove bolts securing torque converter to drive plate.
I
Remove the bolts by turning crankshaft.
13. Support A/T and transfer assembly with a jack.
14. Remove rear engine mounting member from body and A/T assembly. Tighten rear engine mounting member to the specified torque. Refer to EM section (“ENGINE REMOVAL”).
15. Remove bolts securing A/T assembly to engine.
I
Secure torque converter to prevent it from dropping.
I
Secure A/T assembly with transfer to a jack.
16. Lower A/T assembly with transfer.
SAT801C
Installation
I
Drive plate runout
Do not allow any magnetic materials to contact the ring gear teeth.
Maximum allowable runout:
Refer to EM section (“Inspection”, CYLINDER
BLOCK).
If this runout is out of specification, replace drive plate with ring gear.
SAT977H
I
When connecting torque converter to transmission, measure distance “A” to be certain that they are correctly assembled.
Distance “A”:
26.0 mm (1.024 in) or more
SAT017B
I
Install converter to drive plate.
I
After converter is installed to drive plate, rotate crankshaft several turns and check to be sure that transmission rotates freely without binding.
NAT286
AT-117
REMOVAL AND INSTALLATION
Installation (Cont’d)
I
Tighten bolts securing transmission.
NAT287
Bolt No.
Tightening torque
N
⋅ m (kg-m, ft-lb)
39 - 49 (4.0 - 5.0, 29 - 36)
29 - 39 (3.0 - 4.0, 22 - 29)
18 - 22 (1.8 - 2.2, 13 - 16)
Bolt length “ ” mm (in)
58.0 (2.28)
90.0 (3.54)
16.0 (0.63)
3 - 4 (0.3 - 0.4, 2.2 - 2.9) 12.0 (0.47)
29 - 39 (3.0 - 4.0, 22 - 29) 35.0 (1.38)
I
Reinstall any part removed.
I
Check fluid level in transmission.
I
Move selector lever through all positions to be sure that transmission operates correctly.
With parking brake applied, rotate engine at idling. Move selector lever through “N” to “D”, to “2”, to “1” and to “R” positions.
A slight shock should be felt by hand gripping selector each time transmission is shifted.
I
Perform road test. Refer to “ROAD TEST”, AT-32.
SAT638A
AT-118
MAJOR OVERHAUL
AT-119
NAT223
MAJOR OVERHAUL
AT-120
YAT342
MAJOR OVERHAUL
Oil Channel
AT-121
SAT185B
MAJOR OVERHAUL
Locations of Needle Bearings, Thrust Washers and Snap Rings
AT-122
NAT225
DISASSEMBLY
Disassembly
1. Drain ATF through drain plug.
2. Remove torque converter by holding it firmly and turning while pulling straight out.
SAT018B
3. Check torque converter one-way clutch.
a. Insert Tool into spline of one-way clutch inner race.
b. Hook bearing support unitized with one-way clutch outer race with suitable wire.
c. Check that one-way clutch inner race rotates only clockwise with Tool while holding bearing support with wire.
NAT226
4. Remove park/neutral position switch from transmission case.
YAT339
5. Remove oil pan.
I
Always place oil pan straight down so that foreign particles inside will not move.
SAT754I
6. Place transmission into Tool with the control valve facing up.
NAT227
AT-123
DISASSEMBLY
Disassembly (Cont’d)
7. Check foreign materials in oil pan to help determine cause of malfunction. If the fluid is very dark, smells burned, or contains foreign particles, the frictional material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and clutches to stick and may inhibit pump pressure.
I
If frictional material is detected, replace radiator after repair of A/T. Refer to LC section (“Radiator”, “ENGINE
COOLING SYSTEM”).
SAT171B
8. Remove torque converter clutch solenoid valve and A/T fluid temperature sensor connectors.
I
Be careful not to damage connector.
NAT228
9. Remove oil strainer.
a. Remove oil strainer from control valve assembly then remove
O-ring from oil strainer.
SAT008B b. Check oil strainer screen for damage.
SAT025B
10. Remove control valve assembly.
a. Straighten terminal clips to free terminal cords then remove terminal clips.
SAT009B
AT-124
DISASSEMBLY
Disassembly (Cont’d)
b. Remove bolts q and q
, and remove control valve assembly from transmission.
Bolt symbol Length mm (in)
33 (1.30)
45 (1.77)
SAT353B c. Remove solenoid connector.
I
Be careful not to damage connector.
SAT026B d. Remove manual valve from control valve assembly.
SAT127B
11. Remove terminal cord assembly from transmission case while pushing on stopper.
I
Be careful not to damage cord.
I
Do not remove terminal cord assembly unless it is damaged.
SAT128B
AT-125
DISASSEMBLY
Disassembly (Cont’d)
12. Remove converter housing from transmission case.
I
Be careful not to scratch converter housing.
SAT999A
13. Remove O-ring from input shaft.
SAT995A
14. Remove oil pump assembly.
a. Attach Tool to oil pump assembly and extract it evenly from transmission case.
NAT229 b. Remove O-ring from oil pump assembly.
c. Remove traces of sealant from oil pump housing.
I
Be careful not to scratch pump housing.
SAT028B d. Remove needle bearing and thrust washer from oil pump assembly.
SAT108B
AT-126
DISASSEMBLY
Disassembly (Cont’d)
15. Remove input shaft and oil pump gasket.
SAT988A
16. Remove brake band and band strut.
a. Loosen lock nut and remove band servo anchor end pin from transmission case.
SAT029B b. Remove brake band and band strut from transmission case.
SAT986A c. Hold brake band in a circular shape with clip.
SAT655
17. Remove front side clutch and gear components.
a. Remove clutch pack (reverse clutch, high clutch and front sun gear) from transmission case.
SAT030B
AT-127
DISASSEMBLY
Disassembly (Cont’d)
b. Remove front bearing race from clutch pack.
c. Remove rear bearing race from clutch pack.
SAT113B d. Remove front planetary carrier from transmission case.
SAT031B e. Remove front needle bearing from front planetary carrier.
f.
Remove rear bearing from front planetary carrier.
SAT968A g. Remove rear sun gear from transmission case.
SAT974A
18. Remove adapter case.
a. Remove adapter case from transmission case.
b. Remove adapter case gasket from transmission case.
SAT755I
AT-128
DISASSEMBLY
Disassembly (Cont’d)
c. Remove oil seal from adapter case.
I
Do not remove oil seal unless it is to be replaced.
SAT756I d. Remove revolution sensor from adapter case.
e. Remove O-ring from revolution sensor.
SAT757I
19. Remove output shaft and parking gear.
a. Remove rear snap ring from output shaft.
SAT960A b. Slowly push output shaft all the way forward.
I
Do not use excessive force.
c. Remove snap ring from output shaft.
SAT957A d. Remove output shaft and parking gear as a unit from transmission case.
e. Remove parking gear from output shaft.
SAT109B
AT-129
DISASSEMBLY
Disassembly (Cont’d)
f.
Remove needle bearing from transmission case.
SAT033B
20. Remove rear side clutch and gear components.
a. Remove front internal gear.
SAT954A b. Remove bearing race from front internal gear.
SAT110B c. Remove needle bearing from rear internal gear.
SAT111B d. Remove rear internal gear, forward clutch hub and overrun clutch hub as a set from transmission case.
SAT951A
AT-130
DISASSEMBLY
Disassembly (Cont’d)
e. Remove needle bearing from overrun clutch hub.
f.
Remove overrun clutch hub from rear internal gear and forward clutch hub.
SAT148G g. Remove thrust washer from overrun clutch hub.
SAT036B h. Remove forward clutch assembly from transmission case.
SAT037B
21. Remove band servo and accumulator components.
a. Remove band servo retainer from transmission case.
SAT038B b. Apply compressed air to oil hole until band servo piston comes out of transmission case.
I
Hold piston with a rag and gradually direct air to oil hole.
c. Remove return springs.
SAT039B
AT-131
DISASSEMBLY
Disassembly (Cont’d)
d. Remove springs from accumulator pistons q
, q and q
.
e. Apply compressed air to each oil hole until piston comes out.
I
Hold piston with a rag and gradually direct air to oil hole.
Identification of accumulator pistons
Identification of oil holes
SAT040BA f.
Remove O-ring from each piston.
SAT523GA
22. Remove manual shaft components, if necessary.
a. Hold width across flats of manual shaft (outside the transmission case) and remove lock nut from shaft.
SAT041B b. Remove retaining pin from transmission case.
SAT042B c. While pushing detent spring down, remove manual plate and parking rod from transmission case.
SAT935A
AT-132
DISASSEMBLY
Disassembly (Cont’d)
d. Remove manual shaft from transmission case.
SAT043B e. Remove spacer and detent spring from transmission case.
SAT934A f.
Remove oil seal from transmission case.
SAT044B
AT-133
REPAIR FOR COMPONENT PARTS
Oil Pump
SAT648AB
DISASSEMBLY
1. Loosen bolts in numerical order and remove oil pump cover.
SAT649A
2. Remove rotor, vane rings and vanes.
I
Inscribe a mark on back of rotor for identification of foreaft direction when reassembling rotor. Then remove rotor.
SAT650A
3. While pushing on cam ring remove pivot pin.
I
Be careful not to scratch oil pump housing.
SAT651A
AT-134
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
4. While holding cam ring and spring lift out cam ring spring.
I
Be careful not to damage oil pump housing.
I
Hold cam ring spring to prevent it from jumping.
SAT652A
5. Remove cam ring and cam ring spring from oil pump housing.
SAT653A
6. Remove pivot pin from control piston and remove control piston assembly.
SAT654A
7. Remove oil seal from oil pump housing.
I
Be careful not to scratch oil pump housing.
SAT655A
INSPECTION
Oil pump cover, rotor, vanes, control piston, side seals, cam ring and friction ring
I
Check for wear or damage.
SAT656A
AT-135
REPAIR FOR COMPONENT PARTS
SAT657A
Oil Pump (Cont’d)
Side clearances
I
Measure side clearances between end of oil pump housing and cam ring, rotor, vanes and control piston. Measure in at least four places along their circumferences. Maximum measured values should be within specified positions.
I
Before measurement, check that friction rings, O-ring, control piston side seals and cam ring spring are removed.
Standard clearance (Cam ring, rotor, vanes and control piston):
I
If not within standard clearance, replace oil pump assembly except oil pump cover assembly.
Seal ring clearance
I
Measure clearance between seal ring and ring groove.
Standard clearance:
0.10 - 0.25 mm (0.0039 - 0.0098 in)
Wear limit:
0.25 mm (0.0098 in)
I
If not within wear limit, replace oil pump cover assembly.
SAT658A
ASSEMBLY
1. Drive oil seal into oil pump housing.
I
Apply ATF to outer periphery and lip surface.
NAT295
2. Install cam ring in oil pump housing by the following steps.
a. Install side seal on control piston.
I
Pay attention to its direction — Black surface goes toward control piston.
I
Apply petroleum jelly to side seal.
b. Install control piston on oil pump.
SAT654A c. Install O-ring and friction ring on cam ring.
I
Apply petroleum jelly to O-ring.
SAT660A
AT-136
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
d. Assemble cam ring, cam ring spring and spring seat. Install spring by pushing it against pump housing.
SAT661A e. While pushing on cam ring install pivot pin.
SAT651A
3. Install rotor, vanes and vane rings.
I
Pay attention to direction of rotor.
SAT662A
4. Install oil pump housing and oil pump cover.
a. Wrap masking tape around splines of oil pump cover assembly to protect seal. Position oil pump cover assembly in oil pump housing assembly, then remove masking tape.
b. Tighten bolts in a criss-cross pattern.
SAT649A
5. Install new seal rings carefully after packing ring grooves with petroleum jelly. Press rings down into jelly to a close fit.
I
Seal rings come in two different diameters. Check fit carefully in each groove.
Small dia. seal ring:
No mark
Large dia. seal ring:
Yellow mark in area shown by arrow
I
Do not spread gap of seal ring excessively while installing.
It may deform ring.
YAT341
AT-137
REPAIR FOR COMPONENT PARTS
Control Valve Assembly
AT-138
NAT294
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
DISASSEMBLY
1. Remove solenoids.
a. Remove torque converter clutch solenoid valve and side plate from lower body.
b. Remove O-ring from solenoid.
SAT194B c. Remove line pressure solenoid valve from upper body.
d. Remove O-ring from solenoid.
SAT667A e. Remove 3-unit solenoid assembly from upper body.
f.
Remove O-rings from solenoids.
SAT043G
2. Disassemble upper and lower bodies.
a. Place upper body facedown, and remove bolts, reamer bolts and support plates.
b. Remove lower body, separator plate and separate gasket as a unit from upper body.
I
Be careful not to drop pilot filter, orifice check valve, spring and steel balls.
SAT195B c. Place lower body facedown, and remove separate gasket and separator plate.
d. Remove pilot filter, orifice check valve and orifice check spring.
SAT670A
AT-139
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
e. Check to see that steel balls are properly positioned in upper body. Then remove them from upper body.
SAT671A
INSPECTION
Lower and upper bodies
I
Check to see that there are pins and retainer plates in lower body.
SAT672A
I
Check to see that there are pins and retainer plates in upper body.
I
Be careful not to lose these parts.
SAT673A
I
Check to make sure that oil circuits are clean and free from damage.
I
Check tube brackets and tube connectors for damage.
SAT674A
Separator plates
I
Make sure that separator plate is free of damage and not deformed and oil holes are clean.
SAT675A
AT-140
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
Pilot filter
I
Check to make sure that filter is not clogged or damaged.
SAT676A
Torque converter clutch solenoid valve
I
Check that filter is not clogged or damaged.
I
Measure resistance. Refer to “Component Inspection”, AT-84.
Line pressure solenoid valve
I
Check that filter is not clogged or damaged.
I
Measure resistance. Refer to “Component Inspection”, AT-86.
SAT149G
3-unit solenoid assembly (Overrun clutch solenoid valve and shift solenoid valves A and B)
I
Measure resistance of each solenoid. Refer to “Component
Inspection”, AT-64, AT-67, AT-70.
SAT095B
A/T fluid temperature sensor
I
Measure resistance. Refer to “Component Inspection”, AT-78.
SAT169BA
ASSEMBLY
1. Install upper and lower bodies.
a. Place oil circuit of upper body face up. Install steel balls in their proper positions.
SAT671A
AT-141
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
b. Install reamer bolts from bottom of upper body and install separate gaskets.
SAT681A c. Place oil circuit of lower body face up. Install orifice check spring, orifice check valve and pilot filter.
SAT682A d. Install lower separate gaskets and separator plates on lower body.
e. Install and temporarily tighten support plates, fluid temperature sensor and tube brackets.
SAT197B f.
Temporarily assemble lower and upper bodies, using reamer bolt as a guide.
I
Be careful not to dislocate or drop steel balls, orifice check spring, orifice check valve and pilot filter.
SAT198B
AT-142
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
g. Install and temporarily tighten bolts and tube brackets in their proper locations.
Bolt length and location:
Bolt symbol
Bolt length mm (in)
70
(2.76)
50
(1.97)
33
(1.30)
27
(1.06)
SAT199BA
2. Install solenoids.
a. Attach O-ring and install torque converter clutch solenoid valve and side plates onto lower body.
SAT200B b. Attach O-rings and install 3-unit solenoids assembly onto upper body.
c. Attach O-ring and install line pressure solenoid valve onto upper body.
3. Tighten all bolts.
SAT150G
AT-143
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body
Apply ATF to all components before their installation.
Numbers preceding valve springs correspond with those shown in SDS on page AT-197.
AT-144
SAT665I
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
DISASSEMBLY
1. Remove valves at parallel pins.
I
Do not use a magnetic hand.
SAT834A a. Use a wire paper clip to push out parallel pins.
SAT822A b. Remove parallel pins while pressing their corresponding plugs and sleeves.
I
Remove plug slowly to prevent internal parts from jumping out.
SAT823A c. Place mating surface of valve facedown, and remove internal parts.
I
If a valve is hard to remove, place valve body facedown and lightly tap it with a soft hammer.
I
Be careful not to drop or damage valves and sleeves.
SAT824A
2. Remove valves at retainer plates.
a. Pry out retainer plate with wire paper clip.
SAT825A
AT-145
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
b. Remove retainer plates while holding spring.
SAT826A c. Place mating surface of valve facedown, and remove internal parts.
I
If a valve is hard to remove, lightly tap valve body with a soft hammer.
I
Be careful not to drop or damage valves, sleeves, etc.
SAT827A
I
4-2 sequence valve and relay valve are located far back in upper body. If they are hard to remove, carefully push them out using stiff wire.
I
Be careful not to scratch sliding surface of valve with wire.
SAT828A
SAT829A
INSPECTION
Valve springs
I
Measure free length and outer diameter of each valve spring.
Also check for damage or deformation.
Inspection standard:
I
Replace valve springs if deformed or fatigued.
Control valves
I
Check sliding surfaces of valves, sleeves and plugs.
ASSEMBLY
1. Lubricate the control valve body and all valves with ATF. Install control valves by sliding them carefully into their bores.
I
Be careful not to scratch or damage valve body.
SAT830A
AT-146
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
I
Wrap a small screwdriver with vinyl tape and use it to insert the valves into proper position.
SAT831A
Pressure regulator valve
I
If pressure regulator plug is not centered properly, sleeve cannot be inserted into bore in upper body.
If this happens, use vinyl tape wrapped screwdriver to center sleeve until it can be inserted.
I
Turn sleeve slightly while installing.
SAT832A
Accumulator control plug
I
Align protrusion of accumulator control sleeve with notch in plug.
I
Align parallel pin groove in plug with parallel pin, and install accumulator control valve.
SAT833A
2. Install parallel pins and retainer plates.
SAT834A
I
While pushing plug, install parallel pin.
SAT823A
AT-147
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
4-2 sequence valve and relay valve
I
Push 4-2 sequence valve and relay valve with wire wrapped in vinyl tape to prevent scratching valve body. Install parallel pins.
SAT835A
I
Insert retainer plate while pushing spring.
SAT836A
AT-148
REPAIR FOR COMPONENT PARTS
Control Valve Lower Body
Apply ATF to all components before their installation.
Numbers preceding valve springs correspond with those shown in SDS on page AT-197.
AT-149
SAT112GA
REPAIR FOR COMPONENT PARTS
Control Valve Lower Body (Cont’d)
DISASSEMBLY
1. Remove valves at parallel pins.
2. Remove valves at retainer plates.
For removal procedures, refer to “DISASSEMBLY” of Control
Valve Upper Body.
SAT838A
SAT829A
INSPECTION
Valve springs
I
Check each valve spring for damage or deformation. Also measure free length and outer diameter.
Inspection standard:
I
Replace valve springs if deformed or fatigued.
Control valves
I
Check sliding surfaces of control valves, sleeves and plugs for damage.
ASSEMBLY
I
Install control valves.
For installation procedures, refer to “ASSEMBLY” of Control
SAT838A
AT-150
REPAIR FOR COMPONENT PARTS
Reverse Clutch
NAT296
DISASSEMBLY
1. Check operation of reverse clutch.
a. Install seal ring onto oil pump cover and install reverse clutch.
Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not contact snap ring,
I
D-ring might be damaged.
I
Oil seal might be damaged.
I
Fluid might be leaking past piston check ball.
SAT841A
2. Remove drive plates, driven plates, retaining plate, dish plate and snap ring.
SAT842A
AT-151
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont’d)
3. Remove snap ring from clutch drum while compressing clutch springs.
I
Do not expand snap ring excessively.
4. Remove spring retainer and return spring.
NAT297
5. Install seal ring onto oil pump cover and install reverse clutch drum. While holding piston, gradually apply compressed air to oil hole until piston is removed.
I
Do not apply compressed air abruptly.
6. Remove D-ring and oil seal from piston.
SAT844A
INSPECTION
Reverse clutch snap ring and spring retainer
I
Check for deformation, fatigue or damage.
Reverse clutch return springs
I
Check for deformation or damage. Also measure free length and outside diameter.
Inspection standard:
SAT829A
Reverse clutch drive plates
I
Check facing for burns, cracks or damage.
I
Measure thickness of facing.
Thickness of drive plate:
Standard value: 1.90 - 2.05 mm (0.0748 - 0.0807 in)
Wear limit: 1.80 mm (0.0709 in)
I
If not within wear limit, replace.
Reverse clutch dish plate
I
Check for deformation or damage.
SAT845A
AT-152
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont’d)
Reverse clutch piston
I
Shake piston to assure that balls are not seized.
I
Apply compressed air to check ball oil hole opposite the return spring. Make sure there is no air leakage.
I
Also apply compressed air to oil hole on return spring side to assure that air leaks past ball.
SAT846A
ASSEMBLY
1. Install D-ring and oil seal on piston.
I
Apply ATF to both parts.
SAT847A
2. Install piston assembly by turning it slowly and evenly.
I
Apply ATF to inner surface of drum.
SAT848A
3. Install return springs and spring retainer.
SAT849A
4. Install snap ring while compressing clutch springs.
NAT297
AT-153
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont’d)
I
Do not align snap ring gap with spring retainer stopper.
SAT850A
5. Install drive plates, driven plates, retaining plate and dish plate.
6. Install snap ring.
SAT842A
7. Measure clearance between retaining plate and snap ring. If not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.5 - 0.8 mm (0.020 - 0.031 in)
Allowable limit
1.2 mm (0.047 in)
Retaining plate:
SAT852A
8. Check operation of reverse clutch.
Refer to “DISASSEMBLY” of Reverse Clutch, AT-151.
SAT841A
AT-154
REPAIR FOR COMPONENT PARTS
High Clutch
NAT299
DISASSEMBLY AND ASSEMBLY
Service procedures for high clutch are essentially the same as those for reverse clutch, with the following exception:
SAT853A
I
Check of high clutch operation
SAT854A
AT-155
REPAIR FOR COMPONENT PARTS
High Clutch (Cont’d)
I
Removal and installation of return spring
NAT300
I
Inspection of high clutch return springs
Inspection standard:
SAT829A
I
Inspection of high clutch drive plate
Thickness of drive plate:
Standard
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.40 mm (0.0551 in)
SAT845A
I
Measurement of clearance between retaining plate and snap ring
Specified clearance:
Standard
1.8 - 2.2 mm (0.071 - 0.087 in)
Allowable limit
3.2 mm (0.126 in)
Retaining plate:
SAT858A
AT-156
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches
AT-157
NAT301
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont’d)
DISASSEMBLY AND ASSEMBLY
Forward and overrun clutches are serviced essentially the same way as reverse clutch is serviced. However, note the following exceptions.
I
Check of forward clutch operation.
SAT860A
I
Check of overrun clutch operation.
SAT861A
I
Removal of forward clutch drum
Remove forward clutch drum from transmission case by holding snap ring.
SAT865A
I
Removal of forward clutch and overrun clutch pistons
1. While holding overrun clutch piston, gradually apply compressed air to oil hole.
SAT862A
2. Remove overrun clutch from forward clutch.
SAT863A
AT-158
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont’d)
I
Removal and installation of return springs
NAT302
I
Inspection of forward clutch and overrun clutch return springs
Inspection standard:
SAT829A
I
Inspection of forward clutch drive plates
Thickness of drive plate:
Standard
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.40 mm (0.0551 in)
SAT845A
I
Inspection of overrun clutch drive plates
Thickness of drive plate:
Standard
1.90 - 2.05 mm (0.0748 - 0.0807 in)
Wear limit
1.80 mm (0.0709 in)
SAT845A
I
Installation of forward clutch piston and overrun clutch piston
1. Install forward clutch piston by turning it slowly and evenly.
I
Apply ATF to inner surface of clutch drum.
SAT866A
AT-159
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont’d)
I
Align notch in forward clutch piston with groove in forward clutch drum.
SAT867A
2. Install overrun clutch by turning it slowly and evenly.
I
Apply ATF to inner surface of forward clutch piston.
SAT868A
I
Measurement of clearance between retaining plate and snap ring of overrun clutch
Specified clearance:
Standard
1.0 - 1.4 mm (0.039 - 0.055 in)
Allowable limit
2.0 mm (0.079 in)
Retaining plate:
SAT869A
I
Measurement of clearance between retaining plate and snap ring of forward clutch
Specified clearance:
Standard
0.45 - 0.75 mm (0.0138 - 0.0295 in)
Allowable limit
2.15 mm (0.0846 in)
Retaining plate:
SAT870A
AT-160
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake
NAT298
DISASSEMBLY
1. Check operation of low and reverse brake.
a. Install seal ring onto oil pump cover and install reverse clutch.
Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not contact snap ring,
I
D-ring might be damaged.
I
Oil seal might be damaged.
I
Fluid might be leaking past piston check ball.
SAT872A
2. Remove snap ring, low and reverse brake drive plates, driven plates and dish plate.
SAT873A
AT-161
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
3. Remove low one-way clutch inner race, spring retainer and return spring from transmission case.
4. Remove seal rings from low one-way clutch inner race.
5. Remove needle bearing from low one-way clutch inner race.
SAT382I
6. Remove low and reverse brake piston using compressed air.
7. Remove oil seal and D-ring from piston.
SAT876A
INSPECTION
Low and reverse brake snap ring and spring retainer
I
Check for deformation, or damage.
Low and reverse brake return springs
I
Check for deformation or damage. Also measure free length and outside diameter.
Inspection standard:
SAT829A
Low and reverse brake drive plates
I
Check facing for burns, cracks or damage.
I
Measure thickness of facing.
Thickness of drive plate:
Standard value
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.4 mm (0.055 in)
I
If not within wear limit, replace.
SAT845A
AT-162
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
Low one-way clutch inner race
I
Check frictional surface of inner race for wear or damage.
SAT877A
I
Install a new seal rings onto low one-way clutch inner race.
I
Be careful not to expand seal ring gap excessively.
I
Measure seal ring-to-groove clearance.
Inspection standard:
Standard value: 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Allowable limit: 0.25 mm (0.0098 in)
I
If not within allowable limit, replace low one-way clutch inner race.
SAT878A
ASSEMBLY
1. Install needle bearing onto one-way clutch inner race.
I
Pay attention to its direction — Black surface goes to rear side.
I
Apply petroleum jelly to needle bearing.
SAT112B
2. Install oil seal and D-ring onto piston.
I
Apply ATF to oil seal and D-ring.
SAT879A
3. Install piston by rotating it slowly and evenly.
I
Apply ATF to inner surface of transmission case.
SAT880A
AT-163
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
4. Install return springs, spring retainer and low one-way clutch inner race onto transmission case.
5. Install dish plate, low and reverse brake drive plates, driven plates and retaining plate.
6. Install snap ring on transmission case.
SAT881A
7. Check operation of low and reverse brake clutch piston. Refer
SAT872A
8. Measure clearance between retaining plate and snap ring.
If not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.8 - 1.1 mm (0.031 - 0.043 in)
Allowable limit
2.5 mm (0.098 in)
Retaining plate:
SAT885A
9. Install low one-way clutch inner race seal ring.
I
Apply petroleum jelly to seal ring.
I
Make sure seal rings are pressed firmly into place and held by petroleum jelly.
SAT884A
AT-164
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly
DISASSEMBLY
1. Remove snap ring from forward clutch drum.
2. Remove side plate from forward clutch drum.
SAT211GA
SAT212G
3. Remove low one-way clutch from forward clutch drum.
4. Remove snap ring from forward clutch drum.
SAT213G
5. Remove needle bearing from forward clutch drum.
SAT891A
AT-165
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly (Cont’d)
INSPECTION
Forward clutch drum
I
Check spline portion for wear or damage.
I
Check frictional surfaces of low one-way clutch and needle bearing for wear or damage.
SAT892A
Needle bearing and low one-way clutch
I
Check frictional surface for wear or damage.
SAT893A
ASSEMBLY
1. Install needle bearing in forward clutch drum.
2. Install snap ring onto forward clutch drum.
SAT214G
3. Install low one-way clutch onto forward clutch drum by pushing the roller in evenly.
SAT894A
I
Install low one-way clutch with flange facing rearward.
SAT895A
AT-166
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly (Cont’d)
4. Install side plate onto forward clutch drum.
5. Install snap ring onto forward clutch drum.
SAT887A
AT-167
REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub
SAT896AA
DISASSEMBLY
1. Remove rear internal gear by pushing forward clutch hub forward.
SAT897A
2. Remove thrust washer from rear internal gear.
SAT898A
3. Remove snap ring from forward clutch hub.
SAT899A
AT-168
REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub
(Cont’d)
4. Remove end bearing.
SAT900A
5. Remove forward one-way clutch and end bearing as a unit from forward clutch hub.
SAT955A
6. Remove snap ring from forward clutch hub.
SAT901A
INSPECTION
Rear internal gear and forward clutch hub
I
Check gear for excessive wear, chips or cracks.
I
Check frictional surfaces of forward one-way clutch and thrust washer for wear or damage.
I
Check spline for wear or damage.
SAT902A
Snap ring and end bearing
I
Check for deformation or damage.
SAT903A
AT-169
REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub
(Cont’d)
ASSEMBLY
1. Install snap ring onto forward clutch hub.
2. Install end bearing.
SAT901A
3. Install forward one-way clutch onto clutch hub.
I
Install forward one-way clutch with flange facing rearward.
4. Install end bearing.
5. Install snap ring onto forward clutch hub.
SAT904A
6. Install thrust washer onto rear internal gear.
I
Apply petroleum jelly to thrust washer.
I
Securely insert pawls of thrust washer into holes in rear internal gear.
SAT906A
7. Position forward clutch hub in rear internal gear.
SAT907A
8. After installing, check to assure that forward clutch hub rotates clockwise.
SAT905A
AT-170
REPAIR FOR COMPONENT PARTS
Band Servo Piston Assembly
SAT908AC
DISASSEMBLY
1. Block one oil hole in OD servo piston retainer and the center hole in OD band servo piston.
2. Apply compressed air to the other oil hole in piston retainer to remove OD band servo piston from retainer.
3. Remove D-ring from OD band servo piston.
SAT909A
4. Remove band servo piston assembly from servo piston retainer by pushing it forward.
SAT910A
5. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, remove E-ring.
SAT911A
AT-171
REPAIR FOR COMPONENT PARTS
Band Servo Piston Assembly (Cont’d)
6. Remove servo piston spring retainer, return spring C and piston stem from band servo piston.
SAT912A
7. Remove E-ring from band servo piston.
SAT913A
8. Remove servo cushion spring retainer from band servo piston.
9. Remove D-rings from band servo piston.
10. Remove O-rings from servo piston retainer.
SAT914A
INSPECTION
Pistons, retainers and piston stem
I
Check frictional surfaces for abnormal wear or damage.
SAT915A
Return springs
I
Check for deformation or damage. Measure free length and outer diameter.
Inspection standard:
SAT916AA
AT-172
REPAIR FOR COMPONENT PARTS
Band Servo Piston Assembly (Cont’d)
ASSEMBLY
1. Install O-rings onto servo piston retainer.
I
Apply ATF to O-rings.
I
Pay attention to position of each O-ring.
SAT917A
2. Install servo cushion spring retainer onto band servo piston.
SAT918A
3. Install E-ring onto servo cushion spring retainer.
SAT919A
4. Install D-rings onto band servo piston.
I
Apply ATF to D-rings.
SAT920A
5. Install servo piston spring retainer, return spring C and piston stem onto band servo piston.
SAT912A
AT-173
REPAIR FOR COMPONENT PARTS
Band Servo Piston Assembly (Cont’d)
6. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, install E-ring.
SAT921A
7. Install band servo piston assembly onto servo piston retainer by pushing it inward.
SAT922A
8. Install D-ring on OD band servo piston.
I
Apply ATF to D-ring.
SAT923A
9. Install OD band servo piston onto servo piston retainer by pushing it inward.
SAT924A
AT-174
REPAIR FOR COMPONENT PARTS
Parking Pawl Components
SAT758I
DISASSEMBLY
1. Slide return spring to the front of rear extension case flange or adapter case flange.
2. Remove return spring, pawl spacer and parking pawl from rear extension or adapter case.
3. Remove parking pawl shaft from rear extension or adapter case.
SAT226H
4. Remove parking actuator support from rear extension or adapter case.
SAT228H
ASSEMBLY
1. Install parking actuator support onto rear extension or adapter case.
2. Insert parking pawl shaft into rear extension or adapter case.
3. Install return spring, pawl spacer and parking pawl onto parking pawl shaft.
SAT229H
AT-175
REPAIR FOR COMPONENT PARTS
Parking Pawl Components (Cont’d)
4. Bend return spring upward and install it onto rear extension or adapter case.
SAT226H
AT-176
ASSEMBLY
Assembly (1)
1. Install manual shaft components.
a. Install oil seal onto manual shaft.
I
Apply ATF to oil seal.
I
Wrap threads of manual shaft with masking tape.
b. Insert manual shaft and oil seal as a unit into transmission case.
c. Remove masking tape.
SAT931A d. Push oil seal evenly and install it onto transmission case.
SAT932A e. Align groove in shaft with drive pin hole, then drive pin into position as shown in figure at left.
SAT933A f.
Install detent spring and spacer.
g. While pushing detent spring down, install manual plate onto manual shaft.
SAT901E h. Install lock nuts onto manual shaft.
SAT936A
AT-177
ASSEMBLY
Assembly (1) (Cont’d)
2. Install accumulator piston.
a. Install O-rings onto accumulator piston.
I
Apply ATF to O-rings.
Accumulator piston O-rings
Unit: mm (in)
Accumulator
Small diameter end
Large diameter end
29 (1.14)
45 (1.77)
32 (1.26)
50 (1.97)
45 (1.77)
50 (1.97)
29 (1.14)
45 (1.77)
SAT523GA b. Install return spring for accumulator A onto transmission case.
Free length of return spring:
SAT938A c. Install accumulator pistons q
, q
,
I
Apply ATF to transmission case.
q and q
.
SAT939AA
3. Install band servo piston.
a. Install return springs onto servo piston.
SAT941A b. Install band servo piston onto transmission case.
I
Apply ATF to O-ring of band servo piston and transmission case.
c. Install gasket for band servo onto transmission case.
SAT942A
AT-178
ASSEMBLY
Assembly (1) (Cont’d)
d. Install band servo retainer onto transmission case.
SAT940A
4. Install rear side clutch and gear components.
a. Place transmission case in vertical position.
NAT303 b. Slightly lift forward clutch drum assembly. Then slowly rotate it clockwise until its hub passes fully over clutch inner race inside transmission case.
SAT944A c. Check to be sure that rotation direction of forward clutch assembly is correct.
SAT945A d. Install thrust washer onto front of overrun clutch hub.
I
Apply petroleum jelly to the thrust washer.
I
Insert pawls of thrust washer securely into holes in overrun clutch hub.
SAT946A
AT-179
ASSEMBLY
Assembly (1) (Cont’d)
e. Install overrun clutch hub onto rear internal gear assembly.
SAT947A f.
Install needle bearing onto rear of overrun clutch hub.
I
Apply petroleum jelly to needle bearing.
SAT948A g. Check that overrun clutch hub rotates as shown while holding forward clutch hub.
SAT949A h. Place transmission case into horizontal position.
NAT304 i.
Install rear internal gear, forward clutch hub and overrun clutch hub as a unit onto transmission case.
SAT951A
AT-180
ASSEMBLY
Assembly (1) (Cont’d)
j.
Install needle bearing onto rear internal gear.
I
Apply petroleum jelly to needle bearing.
SAT952A k. Install bearing race onto rear of front internal gear.
I
Apply petroleum jelly to bearing race.
I
Securely engage pawls of bearing race with holes in front internal gear.
SAT953A l.
Install front internal gear on transmission case.
SAT954A
5. Install output shaft and parking gear.
a. Insert output shaft from rear of transmission case while slightly lifting front internal gear.
I
Do not force output shaft against front of transmission case.
SAT216B b. Carefully push output shaft against front of transmission case.
Install snap ring on front of output shaft.
I
Check to be sure output shaft cannot be removed in rear direction.
SAT957A
AT-181
ASSEMBLY
Assembly (1) (Cont’d)
c. Install needle bearing on transmission case.
I
Pay attention to its direction — Black side goes to rear.
I
Apply petroleum jelly to needle bearing.
SAT217B d. Install parking gear on transmission case.
SAT218B e. Install snap ring on rear of output shaft.
I
Check to be sure output shaft cannot be removed in forward direction.
SAT960A
6. Install adapter case.
a. Install oil seal on adapter case.
I
Apply ATF to oil seal.
NAT305 b. Install O-ring on revolution sensor.
I
Apply ATF to O-ring.
c. Install revolution sensor on adapter case.
SAT757I
AT-182
ASSEMBLY
Assembly (1) (Cont’d)
d. Install adapter case gasket on transmission case.
SAT963A e. Install parking rod on transmission case.
SAT964A f.
Install adapter case on transmission case.
SAT755I
7. Install front side clutch and gear components.
a. Install rear sun gear on transmission case.
I
Pay attention to its direction.
SAT974A b. Make sure needle bearing is on front of front planetary carrier.
I
Apply petroleum jelly to needle bearing.
c. Make sure needle bearing is on rear of front planetary carrier.
I
Apply petroleum jelly to bearing.
I
Pay attention to its direction — Black side goes to front.
SAT967A
AT-183
ASSEMBLY
Assembly (1) (Cont’d)
d. While rotating forward clutch drum clockwise, install front planetary carrier on forward clutch drum.
SAT969A
I
Check that portion A of front planetary carrier protrudes approximately 2 mm (0.08 in) beyond portion B of forward clutch assembly.
SAT970A e. Make sure bearing races are on front and rear of clutch pack.
I
Apply petroleum jelly to bearing races.
I
Securely engage pawls of bearing races with holes in clutch pack.
SAT971A f.
Install clutch pack into transmission case.
SAT220B
AT-184
ASSEMBLY
Adjustment
When any parts listed in the following table are replaced, total end play or reverse clutch end play must be adjusted.
Part name
Transmission case
Low one-way clutch inner race
Overrun clutch hub
Rear internal gear
Rear planetary carrier
Rear sun gear
Front planetary carrier
Front sun gear
High clutch hub
High clutch drum
Oil pump cover
Reverse clutch drum
Total end play
I
I
I
I
I
I
I
I
I
I
I
—
Reverse clutch end play
I
I
I
I
I
I
I
I
I
I
I
I
1. Adjust total end play.
a. Install new oil pump gasket on transmission case.
SAT433I b. Install pump cover bearing race on clutch pack.
SAT207B c. Measure distance “B” between front end of transmission case and oil pump cover bearing race.
SAT208B
AT-185
ASSEMBLY
Adjustment (Cont’d)
d. Measure distance “C” between front end of transmission case and oil pump cover gasket.
SAT209B e. Determine dimension “A” by using the following equation.
A = B − C
SAT210B f.
Install needle bearing on oil pump assembly.
g. Measure distance “D” between needle bearing and machined surface of oil pump cover assembly.
SAT211B h. Determine total end play “T
1
” by using the following equation.
T
1
= A − D − 0.1
Total end play “T
1
”:
0.25 - 0.55 mm (0.0098 - 0.0217 in)
I
If end play is out of specification, decrease or increase thickness of oil pump cover bearing race as necessary.
Available oil pump cover bearing race:
SAT975A
AT-186
ASSEMBLY
Adjustment (Cont’d)
2. Adjust reverse clutch drum end play.
a. Install oil pump thrust washer on clutch pack.
SAT212B b. Measure distance “F” between front end of transmission case and oil pump thrust washer.
c. Measure distance “G” between front end of transmission case and gasket.
SAT213B d. Determine dimension “E” by using the following equation.
E = F − G
SAT214B e. Measure distance “H”.
SAT215B
AT-187
ASSEMBLY
Adjustment (Cont’d)
f.
Determine reverse clutch drum end play “T
2
” by using the following equation.
T
2
= E − H − 0.1
Reverse clutch drum end play “T
2
”:
0.55 - 0.90 mm (0.0217 - 0.0354 in)
I
If end play is out of specification, decrease or increase thickness of oil pump thrust washer as necessary.
Available oil pump thrust washer:
SAT980A
Assembly (2)
1. Install brake band and band strut.
a. Install band strut on brake band.
I
Apply petroleum jelly to band strut.
SAT985A b. Place brake band on periphery of reverse clutch drum, and insert band strut into end of band servo piston stem.
SAT986A c. Install anchor end bolt on transmission case. Then, tighten anchor end bolt just enough so that reverse clutch drum (clutch pack) will not tilt forward.
SAT987A
2. Install input shaft on transmission case.
I
Pay attention to its direction — O-ring groove side is front.
3. Install gasket on transmission case.
SAT988A
AT-188
ASSEMBLY
Assembly (2) (Cont’d)
4. Install oil pump assembly.
a. Install needle bearing on oil pump assembly.
I
Apply petroleum jelly to the needle bearing.
b. Install selected thrust washer on oil pump assembly.
I
Apply petroleum jelly to thrust washer.
SAT989A c. Carefully install seal rings into grooves and press them into the petroleum jelly so that they are a tight fit.
SAT990A d. Install O-ring on oil pump assembly.
I
Apply petroleum jelly to O-ring.
SAT991A e. Apply petroleum jelly to mating surface of transmission case and oil pump assembly.
SAT992A f.
Install oil pump assembly.
I
Install two converter housing securing bolts in bolt holes in oil pump assembly as guides.
SAT993A
AT-189
ASSEMBLY
Assembly (2) (Cont’d)
I
Insert oil pump assembly to the specified position in transmission, as shown at left.
SAT994A
5. Install O-ring on input shaft.
I
Apply ATF to O-rings.
SAT114B
6. Install converter housing.
a. Apply recommended sealant (Nissan genuine part: KP610-
00250 or equivalent) to outer periphery of bolt holes in converter housing.
I
Do not apply too much sealant.
SAT397C b. Apply recommended sealant (Nissan genuine part: KP610-
00250 or equivalent) to seating surfaces of bolts that secure front of converter housing.
c. Install converter housing on transmission case.
SAT158G
7. Adjust brake band.
a. Tighten anchor end bolt to specified torque.
Anchor end bolt:
: 4 - 6 N
⋅
m
(0.4 - 0.6 kg-m, 35 - 52 in-lb)
b. Back off anchor end bolt two and a half turns.
SAT001B
AT-190
ASSEMBLY
Assembly (2) (Cont’d)
c. While holding anchor end pin, tighten lock nut.
SAT002B
8. Install terminal cord assembly.
a. Install O-ring on terminal cord assembly.
I
Apply petroleum jelly to O-ring.
b. Compress terminal cord assembly stopper and install terminal cord assembly on transmission case.
SAT115B
9. Install control valve assembly.
a. Install accumulator piston return springs q
, q
Free length of return springs:
and q
.
SAT004BA b. Install manual valve on control valve.
I
Apply ATF to manual valve.
SAT005B c. Place control valve assembly on transmission case. Connect solenoid connector for upper body.
d. Install connector clip.
SAT006B
AT-191
ASSEMBLY
Assembly (2) (Cont’d)
e. Install control valve assembly on transmission case.
f.
Install connector tube brackets and tighten bolts q
I
Check that terminal assembly does not catch.
and q
.
Bolt symbol
mm (in)
33 (1.30)
45 (1.77)
SAT353B g. Install O-ring on oil strainer.
I
Apply petroleum jelly to O-ring.
h. Install oil strainer on control valve.
SAT221B i.
Securely fasten terminal harness with clips.
SAT009B j.
Install torque converter clutch solenoid valve and fluid temperature sensor connectors.
SAT010B
AT-192
ASSEMBLY
Assembly (2) (Cont’d)
10. Install oil pan.
a. Attach a magnet to oil pan.
SAT011B b. Install new oil pan gasket on transmission case.
c. Install oil pan and bracket on transmission case.
I
Always replace oil pan bolts as they are self-sealing bolts.
I
Before installing bolts, remove traces of sealant and oil from mating surface and thread holes.
I
Tighten four bolts in a criss-cross pattern to prevent dislocation of gasket.
d. Tighten drain plug.
NAT291
11. Install park/neutral position switch.
a. Check that manual shaft is in “1” position.
b. Temporarily install park/neutral position switch on manual shaft.
c. Move manual shaft to “N”.
NAT292 d. Tighten bolts while inserting 4.0 mm (0.157 in) dia. pin vertically into locating holes in park/neutral position switch and manual shaft.
NAT290
12. Install torque converter.
a. Pour ATF into torque converter.
I
Approximately 2 liters (1-3/4 Imp qt) of fluid are required for a new torque converter.
I
When reusing old torque converter, add the same amount of fluid as was drained.
SAT428DA
AT-193
ASSEMBLY
Assembly (2) (Cont’d)
b. Install torque converter while aligning notches and oil pump.
SAT016B c. Measure distance A to check that torque converter is in proper position.
Distance “A”:
26.0 mm (1.024 in) or more
SAT017B
AT-194
A/T FLUID COOLER SYSTEM
A/T Fluid Cooler
NAT288
REMOVAL AND INSTALLATION
1. Remove front radiator grill. Refer to BT section (“BODY END”).
2. Disconnect fluid hoses from fluid cooler unit.
3. Remove fluid cooler unit.
4. Remove fluid cooler bracket.
5. Remove clips securing fluid hose (cooler unit to radiator) and loosen hose clamps, then remove the fluid hose.
6. Loosen clamps securing fluid hose (A/T assembly to fluid cooler), then remove the fluid hose.
7. Remove bolts securing fluid cooler tube bracket.
8. Remove fluid hose with bracket.
Reverse the removal procedure to install the A/T fluid cooler unit. Refer to the component drawing and specified tightening torque.
Check A/T fluid level and refill if necessary. Refer to MA section (“CHASSIS AND BODY MAINTENANCE”).
NAT289
AT-195
SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
Applied model
Automatic transmission model
Transmission model code number
Stall torque ratio
Transmission gear ratio
1st
2nd
Top
OD
Reverse
Recommended fluid
TD27ETi engine
RE4R01A
4GX07
2.0 : 1
2.785
1.545
1.000
0.694
2.272
Genuine Nissan ATF or equivalent*1
Fluid capacity
(Imp qt)
8.5 (7-1/2)
*1: Refer to MA section (“Fluids and Lubricants”, “RECOMMENDED
FLUIDS AND LUBRICANTS”).
Specifications and Adjustment
SHIFT SCHEDULE
Vehicle speed when shifting gears
Throttle position
Full throttle
Half throttle
D
1
, D
2
32 - 36
(20 - 23)
30 - 34
(19 - 21)
D
2
, D
3
66 - 74
(41 - 46)
62 - 68
(39 - 43)
Vehicle speed km/h (MPH)
D
3
, D
4
108 - 118
(68 - 74)
82 - 92
(51 - 58)
D
4
, D
103 - 113
(64 - 71)
67 - 75
3
(42 - 47)
D
3
, D
61 - 69
2
(38 - 43)
26 - 32
(16 - 20)
D
2
, D
1
27 - 31
(17 - 19)
7 - 11
(4 - 7)
1
2
, 1
1
43 - 47
(27 - 29)
43 - 47
(27 - 29)
Vehicle speed when performing and releasing lock-up
Throttle position
Full throttle
Half throttle
Overdrive control switch
[Shift position]
ON
[D
4
]
OFF
[D
3
]
ON
[D
4
]
OFF
[D
3
]
Vehicle speed km/h (MPH)
Lock-up
“ON”
Lock-up
“OFF”
121 - 129
(76 - 81)
74 - 82
(46 - 51)
116 - 124
(73 - 78)
74 - 82
(46 - 51)
104 - 112
(65 - 70)
74 - 82
(46 - 51)
93 - 101
(58 - 63)
74 - 82
(46 - 51)
STALL REVOLUTION
Stall revolution rpm 2,450 - 2,700
LINE PRESSURE
Engine speed rpm
Idle
Stall
Line pressure kPa (bar, kg/cm
2
, psi)
D, 2 and 1 positions
422 - 461
(4.22 - 4.61,
4.3 - 4.7,
61 - 67)
1,020 - 1,098
(10.20 - 10.98,
10.4 - 11.2,
148 - 159)
R position
589 - 627
(5.89 - 6.27,
6.01 - 6.40,
85.4 - 90.9)
1,422 - 1,500
(14.22 - 15.00,
14.5 - 15.3,
206 - 218)
AT-196
RETURN SPRINGS
SERVICE DATA AND SPECIFICATIONS (SDS)
Specifications and Adjustment (Cont’d)
Unit: mm (in)
Item
Free length Outer diameter
Control valve
Upper body
Lower body
Reverse clutch
High clutch
Forward clutch
(Overrun clutch)
Low & reverse brake
Parts
Part No.
Torque converter relief valve spring
Pressure regulator valve spring
Pressure modifier valve spring
Accumulator control valve spring
Shuttle shift valve D spring
—
31742-41X23
31742-41X24
31742-41X19
—
4-2 sequence valve spring
Shift valve B spring
4-2 relay valve spring
Shift valve A spring
Overrun clutch control valve spring
Overrun clutch reducing valve spring
Shuttle shift valve S spring
Pilot valve spring
31762-41X01
31756-41X00
31762-41X01
31756-41X00
31762-41X01
31762-41X03
31742-41X20
31762-41X04
31742-41X13
Torque converter clutch control valve spring
Modifier accumulator piston spring
1st reducing valve spring
3-2 timing valve spring
Servo charger valve spring
31742-41X22
31742-27X70
31756-41X05
31742-41X06
31742-41X06
16 pcs 31521-41X02 (Assembly)
10 pcs 31521-41X03 (Assembly)
20 pcs 32521-41X00 (Assembly)
18 pcs 31655-41X00 (Assembly)
38.0 (1.496)
44.02 (1.7331)
31.95 (1.2579)
—
25.0 (0.984)
29.1 (1.146)
25.0 (0.984)
29.1 (1.146)
25.0 (0.984)
23.6 (0.929)
32.5 (1.280)
51.0 (2.008)
25.7 (1.012)
18.5 (0.728)
31.4 (1.236)
25.4 (1.000)
23.0 (0.906)
23.0 (0.906)
19.69 (0.7752)
24.2 (0.953)
35.77 (1.4083)
22.3 (0.878)
9.0 (0.354)
14.0 (0.551)
6.8 (0.268)
—
7.0 (0.276)
6.95 (0.2736)
7.0 (0.276)
6.95 (0.2736)
7.0 (0.276)
7.0 (0.276)
7.0 (0.276)
5.65 (0.2224)
9.0 (0.354)
13.0 (0.512)
9.8 (0.386)
6.75 (0.2657)
6.7 (0.264)
6.7 (0.264)
11.6 (0.457)
11.6 (0.457)
9.7 (0.382)
11.2 (0.441)
Band servo
Accumulator
Spring q
Spring q
Spring q
Accumulator q
Accumulator q
Accumulator q
Accumulator q
31605-41X05
31605-41X00
31605-41X01
31605-41X02
31605-41X10
31605-41X09
31605-41X06
45.6 (1.795)
53.8 (2.118)
29.7 (1.169)
43.0 (1.693)
66.0 (2.598)
45.0 (1.772)
58.4 (2.299)
34.3 (1.350)
40.3 (1.587)
27.6 (1.087)
18.0 (0.709)
20.0 (0.787)
29.3 (1.154)
17.3 (0.681)
ACCUMULATOR O-RING
Diameter mm (in)
Accumulator
Small diameter end
Large diameter end
29 (1.14) 32 (1.26) 45 (1.77) 29 (1.14)
45 (1.77) 50 (1.97) 50 (1.97) 45 (1.77)
AT-197
SERVICE DATA AND SPECIFICATIONS (SDS)
Specifications and Adjustment (Cont’d)
CLUTCHES AND BRAKES
Code number 4GX07
Code number 4GX07
Overrun clutch
Reverse clutch
Number of drive plates 3
Number of drive plates 2
Number of driven plates 5
Number of driven plates 2
Thickness of drive plate mm (in)
Standard
Wear limit
1.90 - 2.05 (0.0748 - 0.0807)
1.80 (0.0709)
Thickness of drive plate mm (in)
Standard
Wear limit
1.90 - 2.05 (0.0748 - 0.0807)
1.80 (0.0709)
Clearance mm (in)
Standard
Allowable limit
0.5 - 0.8 (0.020 - 0.031)
1.2 (0.047)
Clearance mm (in)
Standard
Allowable limit
1.0 - 1.4 (0.039 - 0.055)
2.0 (0.079)
Thickness mm (in)
Part number
Thickness mm (in)
Part number
Thickness of retaining plate
4.8 (0.189)
5.0 (0.197)
5.2 (0.205)
5.4 (0.213)
5.6 (0.220)
31537-42X02
31537-42X03
31537-42X04
31537-42X05
31537-42X06
Thickness of retaining plate
Low & reverse brake
4.2 (0.165)
4.4 (0.173)
4.6 (0.181)
4.8 (0.189)
5.0 (0.197)
31537-41X80
31537-41X81
31537-41X82
31537-41X83
31537-41X84
High clutch
Number of drive plates 7
Number of drive plates 5
Number of driven plates 7
Number of driven plates 5
Thickness of drive plate mm (in)
Standard
Wear limit
1.52 - 1.67 (0.0598 - 0.0657)
1.40 (0.0551)
Thickness of drive plate mm (in)
Standard
Wear limit
1.52 - 1.67 (0.0598 - 0.0657)
1.4 (0.055)
Clearance mm (in)
Standard
Allowable limit
1.8 - 2.2 (0.071 - 0.087)
3.2 (0.126)
Clearance mm (in)
Standard
Allowable limit
0.8 - 1.1 (0.031 - 0.043)
2.5 (0.098)
Thickness mm (in)
Part number
Thickness mm (in)
Part number
Thickness of retaining plate
Forward clutch
Number of drive plates
3.4 (0.134)
3.6 (0.142)
3.8 (0.150)
4.0 (0.157)
4.2 (0.165)
4.4 (0.173)
4.6 (0.181)
4.8 (0.189)
7
31537-41X71
31537-41X61
31537-41X62
31537-41X63
31537-41X64
31537-41X65
31537-41X66
31537-41X67
Thickness of retaining plate
6.6 (0.260)
6.8 (0.268)
7.0 (0.276)
7.2 (0.283)
7.4 (0.291)
7.6 (0.299)
7.8 (0.307)
8.0 (0.315)
8.2 (0.323)
8.4 (0.331)
8.6 (0.339)
8.8 (0.346)
9.0 (0.354)
31667-41X17
31667-41X11
31667-41X12
31667-41X13
31667-41X14
31667-41X07
31667-41X08
31667-41X00
31667-41X01
31667-41X02
31667-41X03
31667-41X04
31667-41X05
Number of driven plates 7
Brake band
Thickness of drive plate mm (in)
Standard
Wear limit
1.52 - 1.67 (0.0598 - 0.0657)
1.40 (0.0551)
Anchor end bolt tightening torque
N
⋅ m (kg-m, in-lb)
4 - 6 (0.4 - 0.6, 35 - 52)
Clearance mm (in)
Standard
Allowable limit
0.35 - 0.75 (0.0138 - 0.0295)
2.15 (0.0846)
Number of returning revolution for anchor end bolt
2.5
Thickness mm (in)
Part number
Thickness of retaining plate
4.6 (0.181)
4.8 (0.189)
5.0 (0.197)
5.2 (0.205)
5.4 (0.213)
5.6 (0.220)
31537-42X13
31537-42X14
31537-42X15
31537-4AX00
31537-4AX01
31537-4AX02
AT-198
SERVICE DATA AND SPECIFICATIONS (SDS)
Specifications and Adjustment (Cont’d)
OIL PUMP AND LOW ONE-WAY CLUTCH REVERSE CLUTCH DRUM END PLAY
Reverse clutch drum end play “T
2
”
Oil pump clearance mm (in)
Cam ring — oil pump housing
Standard 0.01 - 0.024 (0.0004 - 0.0009)
Rotor, vanes and control piston
— oil pump housing
Standard
Seal ring clearance
Standard
Allowable limit mm (in)
0.03 - 0.044 (0.0012 - 0.0017)
0.10 - 0.25 (0.0039 - 0.0098)
0.25 (0.0098)
Thickness of oil pump thrust washer
0.55 - 0.90 mm
(0.0217 - 0.0354 in)
Thickness mm (in)
Part number
0.9 (0.035)
1.1 (0.043)
1.3 (0.051)
1.5 (0.059)
1.7 (0.067)
1.9 (0.075)
31528-21X01
31528-21X02
31528-21X03
31528-21X04
31528-21X05
31528-21X06
TOTAL END PLAY
Total end play “T
1
”
Thickness of oil pump cover bearing race
0.25 - 0.55 mm
(0.0098 - 0.0217 in)
Thickness mm (in)
Part number
0.8 (0.031)
1.0 (0.039)
1.2 (0.047)
1.4 (0.055)
1.6 (0.063)
1.8 (0.071)
2.0 (0.079)
31435-41X01
31435-41X02
31435-41X03
31435-41X04
31435-41X05
31435-41X06
31435-41X07
REMOVAL AND INSTALLATION
Manual control linkage
Number of returning revolutions for lock nut
Lock nut tightening torque
N
⋅ m (kg-m, in-lb)
Distance between end of converter housing and torque converter mm (in)
2
4.4 - 5.9
(0.45 - 0.60, 39.1 - 52.1)
26.0 (1.024) or more
AT-199
NOTES
advertisement
Key Features
- Compact, dual planetary gear systems
- Optimum shift control and superwide gear ratios
- Two one-way clutches
- Four accumulators
- Fail-safe (limp home mode)
- Self-diagnosis
- CONSULT-II communication line control
- Electronic control module (TCM)