SUBARU 4AT, 4AT(diag), 5AT, 5AT(diag) Automatic Transmission, 5MT Manual Transmission, CL Clutch System Service Manual
Below you will find brief information for Automatic Transmission 5AT(diag), Automatic Transmission 4AT(diag), Automatic Transmission 5AT, Automatic Transmission 4AT. This document is designed for Subaru service personnel and contains the necessary information for the correct maintenance and repair of SUBARU vehicles. It includes procedures for maintenance, disassembling, reassembling, inspection, adjustment of components and diagnostics for guidance of experienced mechanics.
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2004 LEGACY SERVICE MANUAL
TRANSMISSION SECTION
QUICK REFERENCE INDEX
This service manual has been prepared to provide SUBARU service personnel with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.
This manual includes the procedures for maintenance, disassembling, reassembling, inspection and adjustment of components and diagnostics for guidance of experienced mechanics.
Please peruse and utilize this manual fully to ensure complete repair work for satisfying our customers by keeping their vehicle in optimum condition.
When replacement of parts during repair work is needed, be sure to use
SUBARU genuine parts.
CONTROL SYSTEMS
AUTOMATIC TRANSMISSION
AUTOMATIC TRANSMISSION
(DIAGNOSTICS)
AUTOMATIC TRANSMISSION
MANUAL TRANSMISSION AND
DIFFERENTIAL
CLUTCH SYSTEM
CS
4AT
4AT(diag)
5AT
5MT
CL
All information, illustration and specifications contained in this manual are based on the latest product information available at the time of publication approval.
FUJI HEAVY INDUSTRIES LTD.
G2320GE5
AUTOMATIC TRANSMISSION
(DIAGNOSTICS)
5AT(diag)
Page
Basic Diagnostics Procedure ......................................................................2
Electrical Component Location ...................................................................7
Transmission Control Module (TCM) I/O Signal .......................................12
Read Diagnostic Trouble Code (DTC) ......................................................19
SPORT Indicator Light Display .................................................................23
Diagnostic Procedure for Select Monitor Communication.........................26
List of Diagnostic Trouble Code (DTC) .....................................................30
Diagnostic Procedure with Diagnostic Trouble Code (DTC) .....................34
Diagnostic Procedure without Diagnostic Trouble Code (DTC) ..............138
General Diagnostic Table........................................................................147
Basic Diagnostics Procedure
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1. Basic Diagnostics Procedure
A: PROCEDURE
1
2
3
4
5
Step Check
CHECK PRE-INSPECTION.
1) Ask the customer when and how the trouble occurred using the interview checklist.
<Ref. to 5AT(diag)-4, Check List for Interview.>
2) Before performing diagnosis, inspect the following items which might influence the AT problems.
• General inspection <Ref. to 5AT(diag)-5,
INSPECTION, General Description.>
• Oil Leakage
• Stall speed test <Ref. to 5AT-31, Stall Test.>
• Line Pressure Test <Ref. to 5AT-34, Line
Pressure Test.>
• Transfer Clutch Pressure Test <Ref. to 5AT-
36, Transfer Clutch Pressure Test.>
• Time Lag Test <Ref. to 5AT-33, Time Lag
Test.>
• Road Test <Ref. to 5AT-30, Road Test.>
• Inhibitor Switch <Ref. to 5AT-51, Inhibitor
Switch.>
Is the unit that might influence the AT problem normal?
Yes
CHECK SPORT INDICATOR LIGHT.
After the ignition switch is turned to “ON”, wait for at least 2 seconds.
Does the SPORT indicator light illuminate?
CHECK SPORT INDICATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Check the SPORT indicator light. <Ref. to
5AT(diag)-24, INSPECTION, SPORT Indicator
3) After the ignition switch is turned to ON, wait for at least 2 seconds.
Does the SPORT indicator light blink?
CHECK DTC.
Read the DTC. <Ref. to 5AT(diag)-19, OPERA-
TION, Read Diagnostic Trouble Code (DTC).>
Is DTC displayed?
NOTE:
If the communication function of the Subaru Select Monitor cannot be executed normally,
check the communication circuit. <Ref. to
5AT(diag)-26, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, Diagnostic Procedure for Select Monitor Communication.>
PERFORM THE GENERAL DIAGNOSTICS.
1) Inspect using “Diagnostic Procedure with-
out Diagnostic Trouble Code (DTC)”. <Ref. to
5AT(diag)-138, Diagnostic Procedure without
Diagnostic Trouble Code (DTC).>
2) Perform clear memory mode.
3) Perform the inspection mode. <Ref. to
5AT(diag)-20, Inspection Mode.>
4) Display DTC.
Is DTC displayed?
NOTE:
Record all DTC.
No
Repair or replace each item.
Inspect using
“General Diagnos-
5AT(diag)-2
6
Basic Diagnostics Procedure
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
PERFORM THE DIAGNOSIS.
1) Inspect using the “Diagnostic Procedure
with Diagnostic Trouble Code (DTC)”. <Ref. to
5AT(diag)-34, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Check
Is DTC displayed?
NOTE:
For DTC table, refer to “List of Diagnostic Trou-
ble Code (DTC)”. <Ref. to 5AT(diag)-30, List of
Diagnostic Trouble Code (DTC).>
2) Repair the trouble cause.
3) Perform clear memory mode.
4) Perform the inspection mode. <Ref. to
5AT(diag)-20, Inspection Mode.>
5) Display DTC.
Yes No
Inspect using the
“Diagnostic Procedure with Diagnostic Trouble Code
Diagnostic Procedure with Diagnostic Trouble Code
Inspect using
“General Diagnos-
5AT(diag)-3
Check List for Interview
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
2. Check List for Interview
A: INSPECTION
Check the following items when problem has occurred.
NOTE:
Use copies of this page for interviewing customers.
Customer’s name
Date of sale
Date of repair
Trans. model
Odometer reading
Symptom
Frequency
Weather
Place
Ambient air temperature
Vehicle speed
AT warning light (SPORT indicator light)
Select lever position
Driving condition
Manual mode
TRANSMISSION V.I.N.
km (miles)
❏
No up-shift
❏
No down-shift
❏
No kick down
❏
Vehicle does not move (
❏
Any position
❏
Particular position)
❏
Lock-up malfunction
❏
Noise or vibration
❏
Shift shock or slip
❏
Select lever does not move
(
❏
Others
)
(
❏
Continuous
❏
Intermittent ( times a day)
❏
Fine
❏
Cloudy
❏
Rainy
❏
Snowy
❏
Others
)
(
❏
Highland
❏
Suburbs
❏
Inner city
❏
Uphill
❏
Rough road
❏
Others
)
❏
Hot
❏
Warm
❏
Cool
❏
Cold
❏
Blinks continuously
❏
Not blink
❏
P
❏
R
❏
N
❏
D
❏
Manual mode
❏
Not affected
❏
At racing
❏
When decelerating
❏
❏
❏
At starting
When accelerating
While turning (
❏
RH /
❏
LH)
❏
ON
❏
OFF
❏
While idling
❏
While cruising km/h (MPH)
5AT(diag)-4
3. General Description
A: CAUTION
General Description
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• Supplemental Restraint System
The airbag system wiring harness is routed near the TCM.
CAUTION:
• All airbag system wiring harnesses and connectors are colored yellow. Do not use an electric test equipment on these circuits.
• Be careful not to damage the airbag system wiring harness when performing diagnostics and servicing the TCM.
• Measurement
When measuring the voltage and resistance of the
ECM, TCM or each sensor, use a tapered pin with a diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert a pin more than
0.65 mm (0.026 in) diameter.
B: INSPECTION
1. BATTERY
Measure battery voltage and specific gravity of electrolyte.
Standard voltage: 12 V or more
Specific gravity: More than 1.260
2. TRANSMISSION GROUND
Make sure that the ground terminal bolt is tightened securely.
• Chassis side
Tightening torque:
13 N
⋅
m (1.3 kgf-m, 9.4 ft-lb)
3. ATF LEVEL
Make sure that ATF level is in the specification.
<Ref. to 5AT-27, INSPECTION, Automatic Transmission Fluid.>
(A)
(A) Level gauge
(B) Check position when “HOT”
(C) Upper level
(D) Lower level
(E) Check position when “COLD”
(C)
(D)
(E)
4. FRONT DIFFERENTIAL OIL LEVEL
Make sure the front differential oil level is in the specification. <Ref. to 5AT-29, INSPECTION, Differential Gear Oil.>
(A)
(B)
(B)
(C)
(D)
AT-01450
AT-01464
AT-00317
(A) Upper level
(B) Lower level
5. OPERATION OF SHIFT SELECT LEVER
Make sure there is no abnormal noise, dragging or contact pattern in each select lever range.
WARNING:
Stop the engine while checking operation of the select lever.
5AT(diag)-5
General Description
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• LHD model • RHD model
AT-02048
C: PREPARATION TOOL
1. SPECIAL TOOL
ILLUSTRATION TOOL NUMBER
24082AA230
DESCRIPTION
CARTRIDGE
REMARKS
Troubleshooting for electrical system.
AT-01465
ST24082AA230
22771AA030 SUBARU SELECT
MONITOR KIT
Troubleshooting for electrical system.
• English: 22771AA030 (Without printer)
• German: 22771AA070 (Without printer)
• French: 22771AA080 (Without printer)
• Spanish: 22771AA090 (Without printer)
ST22771AA030
2. GENERAL TOOL
TOOL NAME
Circuit tester
Oscilloscope
REMARKS
Used for measuring resistance, voltage and current.
Used for measuring sensor.
5AT(diag)-6
Electrical Component Location
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
4. Electrical Component Location
A: LOCATION
1. CONTROL MODULE
• LHD model
(1)
(3) (4) (2) (5)
(1) Engine control module (ECM)
(2) SPORT indicator light (AT warning light)
(3) Transmission control module
(TCM)
• RHD model
(3) (2) (4) (5)
(4) Data link connector
(5) Body integrated unit
AT-02049
(1)
(1) Engine control module (ECM)
(2) SPORT indicator light (AT warning light)
(3) Transmission control module
(TCM)
(4) Data link connector
(5) Body integrated unit
AT-01467
5AT(diag)-7
Electrical Component Location
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• LHD model
(1)
AT-02051
(2)
(4)
(3)
AT-02053
AT-01470
AT-02052
(5)
AT-02054
• RHD model
(1)
AT-01468
(2)
AT-01470
5AT(diag)-8
2. SENSOR
• LHD model
(5)
(3)
Electrical Component Location
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
(4)
AT-01469 AT-01471
AT-01472
(3) (6),(9) (7)
(5),(8) (1) (2) (4)
5AT(diag)-9
AT-02050
Electrical Component Location
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• RHD model
(1) (3) (6),(9) (7)
(1) Accelerator position sensor
(2) Front vehicle speed sensor
(3) Inhibitor switch
(5),(8) (2) (4)
(4) Rear vehicle speed sensor
(5) Turbine speed sensor 1
(6) ATF temperature sensor 1
(7) Lateral G sensor
(8) Turbine speed sensor 2
(9) ATF temperature sensor 2
AT-01443
(2)
(1)
AT-00375
(5)
AT-01447
(4)
(3)
AT-01445 AT-01448
5AT(diag)-10
Electrical Component Location
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
(7)
(6)
AT-01446
AT-01475
(9)
3. SOLENOID
(8)
AT-01759
(3) (2) (4) (7) (8) (6) (5) (1)
AT-01760
(9)
(1) High & low reverse clutch solenoid (4) Input clutch solenoid
(2) Direct clutch solenoid (5) Line pressure solenoid
(3) Front brake solenoid (6) Lock up solenoid
5AT(diag)-11
(7) Transfer solenoid
(8) Low coast brake solenoid
(9) Memory box
AT-01449
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
5. Transmission Control Module (TCM) I/O Signal
A: ELECTRICAL SPECIFICATION
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
AT-01451
NOTE:
The measurement should perform after warming up.
I/C oil pressure switch input
Item
P/L solenoid output
PVIGN power supply
Power GND
CAN communication line
(+)
CAN communication line
(
−
)
Connector
No.
Termin al
No.
B54
Measuring conditions
9
Engine ON, “P” range,
Accelerator OFF, Brake
ON
Manual mode 1st, Accelerator OFF, Brake ON
8 Ignition switch ON
B54
7 Ignition switch ON
B54
B54
B54
6
5
4
Always
—
—
Voltage (V)
Measure the resistance between terminal and chassis ground.
Approx. 4.0 —
6.0 V
Approx. 2.0 —
4.0 V
Power supply voltage
Power supply voltage
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
—
—
Remarks
Driving frequency 750 —
850 Hz
— —
The condition of I/C oil pressure switch cannot read by the tester.
Approx. 0 V
—
—
—
B54 3 —
ATF temperature sensor
1 input
B54 2 Ignition switch ON
—
2.5 — 2.9 V
(ATF temperature 20
°
C
(68
°
F))
0.8 — 1.0 V
(ATF temperature 80
°
C
(176
°
F))
—
4.0 — 5.0 k
Ω
(ATF temperature 20
°
C
(68
°
F))
0.7 — 0.9 k
Ω
(ATF temperature 80
°
C
(176
°
F))
5AT(diag)-12
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Power GND
Analog GND (Sensor
GND)
Item
Battery power supply
I/C solenoid output
H&LR/C solenoid output
Control valve power supply output
LC/B solenoid output
Connector
No.
Termin al
No.
B54
B54
B54
B54
B54
B54
B54
Measuring conditions Voltage (V)
1
18
17
Always
While driving at 1st — 3rd of manual mode
While driving at 4th or 5th of manual mode
While driving at 2nd of manual mode
While driving at 3rd — 5th of manual mode
Power supply voltage
Approx. 5.5 —
7.5 V
Approx. 0 V
Approx. 5.5 —
7.5 V
Approx. 0 V
16
Ignition switch ON
Ignition switch OFF
While driving at 1st — 2nd of manual mode
15
While driving at 3rd — 5th of manual mode
14 Always
Power supply voltage
Approx. 0 V
Power supply voltage
Approx. 0 V
Approx. 0 V
13 Always Approx. 0 V
Measure the resistance between terminal and chassis ground.
—
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
—
5 — 17
Ω
(ATF temperature
25
°
C (77
°
F))
—
—
Remarks
Driving frequency 750 —
850 Hz
Driving frequency 750 —
850 Hz
LC/B oil pressure switch input
B54 12 — — —
The condition of LC/B oil pressure switch cannot read by the tester.
ATF temperature sensor
2 input
PVIGN power supply relay output
Fr/B solenoid output
L/U solenoid output
D/C solenoid output
D/C oil pressure switch input
B54
B54
B54
B54
B54
B54
11 Ignition switch ON
2.3 — 2.7 V
(ATF temperature 20
°
C
(68
°
F))
0.6 — 0.8 V
(ATF temperature 80
°
C
(176
°
F))
0 — 1.5 V 10 Ignition switch ON
24
23
22
While driving at other than
4th of manual mode
While driving at 4th of manual mode
Approx. 4.5 —
6.5 V
Approx. 0 V
When lock-up
When not lock-up
While driving at 1st or 5th of manual mode
While driving at 2nd — 4th of manual mode
Approx. 3.5 —
5.5 V
Approx. 0 V
Approx. 5.5 —
7.5 V
Approx. 0 V
3.0 — 3.6 k
Ω
(ATF temperature 20
°
C
(68
°
F))
0.4 — 0.6 k
Ω
(ATF temperature 80
°
C
(176
°
F))
—
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
21 — — —
Driving frequency 750 —
850 Hz
Driving frequency 750 —
850 Hz
Driving frequency 750 —
850 Hz
The condition of D/C oil pressure switch cannot read by the tester.
Subaru Select Monitor communication line
B54 20 — — —
5AT(diag)-13
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Lateral G sensor power supply
Lateral G sensor signal input
Rear vehicle speed sensor input
Fr/B oil pressure switch input
Turbine speed sensor 1 input
Item
Control GND
H&LR/C oil pressure switch input
Front vehicle speed sensor input
Inhibitor switch 1 input
Inhibitor switch 2 input
Accessory power supply
Ignition power supply
Connector
No.
Termin al
No.
B54
B55
B55
Measuring conditions Voltage (V)
19 Always
While driving at 2nd of manual mode
8
While driving at 3rd — 5th of manual mode
7
While driving at 2nd and
20 km/h (12 MPH) of manual mode
While driving at 4th and 80 km/h (50 MPH) of manual mode
Approx. 0 V
Power supply voltage
Approx. 0 V
Approx. 140 —
170 Hz
Approx. 560 —
680 Hz
B55
B55
B55
B55
B55
B55
B55
B55
B55
6 Ignition switch ON
5
4
3
2
1
18
17
16
4.75 — 5.25 V
Ignition switch ON, Engine
ON, Flat value
Ignition switch ON, “P” range
Ignition switch ON, “N” range
Ignition switch ON, “P” range
Ignition switch ON, “D” range
2.0 — 3.0 V
4.0 — 5.0 V
1.5 V or less
4.0 — 5.0 V
1.5 V or less
Accessory switch ON
Accessory switch OFF
Ignition switch ON
Power supply voltage
Approx. 0 V
Power supply voltage
Approx. 0 V Ignition switch OFF
While driving at 2nd and
20 km/h (12 MPH) of manual mode
While driving at 4th and 80 km/h (50 MPH) of manual mode
Ignition switch ON, Engine
ON, While driving at other than 4th
Ignition switch ON, Engine
ON, While driving at 4th
2nd of manual mode, Turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
4th of manual mode, Turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
Approx. 190 —
230 Hz
Approx. 760 —
920 Hz
Approx. 0 V
Power supply voltage
Approx. 0 Hz
Approx. 1,900
— 2,100 Hz
Measure the resistance between terminal and chassis ground.
—
—
—
—
—
—
—
—
—
—
—
—
Remarks
Use an oscilloscope.
Use an oscilloscope.
5AT(diag)-14
Transmission Control Module (TCM) I/O Signal
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Item
Range lock solenoid output
Inhibitor switch 3 input
Inhibitor switch 4 input
Control valve communication line
Back-up light relay output
Ignition power supply
AWD solenoid output
Turbine speed sensor 2 input
Control GND
Inhibitor switch 3 open circuit monitor input
PN signal output
Connector
No.
Termin al
No.
B55
B55
B55
B55
B55
B55
B55
B55
B55
B55
B55
Measuring conditions Voltage (V)
15
14
13
Ignition switch ON, While stopping at “D” range
About Power
Supply Voltage
−
1.2 V
Ignition switch ON, Vehicle speed at least 20 km/h (12
MPH)
Ignition switch ON, “R” range
Ignition switch ON, “D” range
Ignition switch ON, “P” range
Ignition switch ON, “D” range
Approx. 0 V
4.0 — 5.0 V
1.5 V or less
4.0 — 5.0 V
1.5 V or less
— — 12
11
Ignition switch ON, “R” range
Ignition switch ON, Other than “R” range
Ignition switch ON
10
Ignition switch OFF
Engine ON, “P” range or
“N” range, Accelerator
OFF
23
Engine ON, “D” range,
Accelerator OFF, Brake
ON
2nd of manual mode, Turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
22
4th of manual mode, Turbine speed sensor is
2,000 rpm (Read from
Subaru Select Monitor)
21 Always
Ignition switch ON, “D” range
20
Ignition switch ON, “R” range
19
Ignition switch ON, Other than “P” range or “N” range
Ignition switch ON, “P” range or “N” range
1.5 V
Power supply voltage
Power supply voltage
Approx. 0 V
Approx. 0 V
Approx. 2.0 —
3.0 V
Approx. 1,300
— 1,500 Hz
Approx. 1,900
— 2,100 Hz
Approx. 0 V
4.0 — 5.0 V
Less than 1.5 V
Power supply voltage
0 — 1.0 V
Measure the resistance between terminal and chassis ground.
7 — 21
Ω
—
—
—
Approx. 90 —
110
Ω
(ATF temperature 25
°
C
(77
°
F))
—
3 — 9
Ω
(ATF temperature
20
°
C (68
°
F))
—
—
—
—
—
Remarks
Driving frequency 750 —
850 Hz
Use an oscilloscope.
Use an oscilloscope.
ECM should connected correctly
5AT(diag)-15
Subaru Select Monitor
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6. Subaru Select Monitor
A: OPERATION
1. READ DIAGNOSTIC TROUBLE CODE
(DTC)
1) Prepare the Subaru Select Monitor kit.
NOTE:
Do not connect scan tools except for Subaru Select
Monitor.
5) Turn ignition switch to ON (engine OFF) and turn on the Subaru Select Monitor.
(A)
AT-00338
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Insert the cartridge to Subaru Select Monitor.
<Ref. to 5AT(diag)-6, PREPARATION TOOL, General Description.>
AT-00339
4) Connect the Subaru Select Monitor to data link connector.
(1) Data link connector is located in the lower portion of the instrument panel (on the driver’s side).
(1)
AT-01712
(1) Data link connector
(2) Connect the diagnosis cable to data link connector.
AT-00341
(A) Power switch
6) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
7) On the «System Selection Menu» display screen, select the {Transmission} and press the
[YES] key.
8) Press the [YES] key after the information of transmission type is displayed.
9) On the «Transmission Diagnosis» display screen, select the {Diagnosis Code(s) Display} and press [YES] key.
NOTE:
• For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERA-
TION MANUAL”.
• For details concerning DTCs, refer to the List of
Diagnostic Trouble Code (DTC). <Ref. to 5AT(diag)-30, List of Diagnostic Trouble Code (DTC).>
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Transmission} and press the
[YES] key.
3) Press the [YES] key after the information of transmission type is displayed.
4) On the «Transmission Diagnosis» display screen, select the {Current Data Display & Save} and press the [YES] key.
5) On the «Transmission Diagnosis» display screen, select the {Data Display} and press the
[YES] key.
6) Using the scroll key, scroll the display screen up or down until the desired data is shown.
5AT(diag)-16
Subaru Select Monitor
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• A list of the support data is shown in the following table.
Item
Engine speed signal
Battery voltage
Accelerator Position Sensor
Front vehicle speed sensor signal
Gear position
Turbine speed sensor signal
Rear vehicle speed sensor signal
Lateral G sensor
ATF Temperature Sensor 1 Signal
ATF Temperature Sensor 2 Signal
Turbine speed sensor 1 signal
Turbine speed sensor 2 signal
High & Low Reverse Clutch Solenoid Indicator Current
Direct Clutch Solenoid Indicator Current
Front Brake Solenoid Indicator Current
Input Clutch Solenoid Indicator Current
Line Pressure Solenoid Indicator Current
Lock-up Solenoid Indicator Current
Transfer Solenoid Indicator Current
High & Low Reverse Clutch Solenoid Target Oil Pressure
Direct Clutch Solenoid Target Oil Pressure
Front Brake Solenoid Target Oil Pressure
Input Clutch Solenoid Target Oil Pressure
Line Pressure Solenoid Target Oil Pressure
Lock-up Solenoid Target Oil Pressure
Transfer Solenoid Target Oil Pressure
Ignition switch
Tip signal
Cruise control On signal
Tip Down Shift Signal
Stop light switch signal
Tip Up Shift Signal
Drive range signal
Reverse range signal
Diagnosis Light Output Signal
Shift lock solenoid signal
Parking range signal
P/N Range Output Signal
Neutral range signal
Inhibitor Switch 1 Input Signal
Inhibitor Switch 2 Input Signal
Inhibitor Switch 3 Input Signal
Inhibitor Switch 4 Input Signal
Inhibitor Switch 3 Monitor Input Signal
Backup light relay output signal
High & Low Reverse Clutch Oil Pressure Switch Input Signal
Direct Clutch Oil Pressure Switch Input Signal
Front Brake Oil Pressure Switch Input Signal
Input Clutch Oil Pressure Switch Input Signal
Display
Engine speed
Battery Voltage
Acceleration opening angle
Front Wheel Speed
Gear Position
Turbine Revolution Speed
Rear Wheel Speed
Lateral G sensor
ATF Temp.
ATF Temp. 2
Turbine Revolution Speed 1
Turbine Revolution Speed 2
H&LR/C Solenoid Current
D/C Solenoid Current
F/B Solenoid Current
I/C Solenoid Current
P/L Solenoid Current
L/U Solenoid Current
AWD Solenoid Current
H&LR/C Solenoid Target Pressure
D/C Solenoid Target Pressure
F/B Solenoid Target Pressure
I/C Solenoid Target Pressure
P/L Solenoid Target Pressure
L/U Solenoid Target Pressure
AWD Solenoid Target Pressure
Ignition SW
Tip Mode SW
Cruise Control Signal
Down SW
Stop Light SW
Up SW
D Range
R Range
Diagnosis Lamp
Shift lock solenoid
P range
P/N Signal
N range
Inhibitor SW1
Inhibitor SW2
Inhibitor SW3
Inhibitor SW4
Inhibitor SW3 Monitor
Back-up light relay
H&LR/C Oil Pressure SW
D/C Oil Pressure SW
Fr/B Oil Pressure SW
I/C Oil Pressure SW
Unit of measure rpm
V
% km/h
— rpm km/h
V
°
C
°
C rpm rpm
A
A
A
A
A
A
A kPa kPa kPa kPa kPa kPa kPa
ON Input or OFF Input
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
High or Low
High or Low
High or Low
High or Low
High or Low
ON or OFF
ON or OFF
ON or OFF
ON or OFF
ON or OFF
5AT(diag)-17
Subaru Select Monitor
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Item
Low Coast Brake Oil Pressure Switch Input Signal
Low Coast Brake Solenoid Input Signal
NOTE:
For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION
MANUAL”.
3. CLEAR MEMORY MODE
NOTE:
To clear the previous DTC, use {Clear Memory}, and to clear the learned value, use {Clear Memory
2}.
1) Check that the select lever is in “P” range.
2) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
3) On the «System Selection Menu» display screen, select the {Transmission} and press the
[YES] key.
4) Press the [YES] key after the information of transmission type is displayed.
5) On the «Transmission Diagnosis» display screen, select the {Clear Memory} and press the
[YES] key.
NOTE:
If {Clear Memory 2} is selected and performed,
DTC may not be cleared.
6) When the ‘Done’ are shown on the display screen, turn off the Subaru Select Monitor and turn the ignition switch to OFF. To turn the ignition switch ON again, wait for more than 10 seconds.
NOTE:
For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION
MANUAL”.
Display
LC/B Oil Pressure SW
LC B Solenoid
Unit of measure
ON or OFF
ON or OFF
5AT(diag)-18
Read Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7. Read Diagnostic Trouble
Code (DTC)
A: OPERATION
Refer to “Subaru Select Monitor” for information about how to obtain and understand the DTC.
<Ref. to 5AT(diag)-16, OPERATION, Subaru Select Monitor.>
NOTE:
DTC can not be read by SPORT indicator light.
5AT(diag)-19
Inspection Mode
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
8. Inspection Mode
A: PROCEDURE
WARNING:
Observe the traffic law during actual driving.
1) Shift the select lever to “D” range, and then drive the vehicle with changing the gear from 1st to 5th.
2) When driving the vehicle at 5th speed of “D” range, set the gear to manual mode and drive the vehicle with shifting down using “
−
” of steering switch or “
−
” of select lever from 5th
→
4th, 4th
→
3rd, 3rd
→
2nd, 2nd
→
1st.
NOTE:
At shifting down, drive the vehicle at least 10 seconds in each speed.
3) Shift the select lever to “R” range and drive the vehicle for more than 2 seconds.
5AT(diag)-20
Clear Memory Mode
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
9. Clear Memory Mode
A: OPERATION
Use “Subaru Select Monitor” to clear DTC. <Ref. to
5AT(diag)-18, CLEAR MEMORY MODE, OPERA-
NOTE:
DTC cannot be cleared without using Subaru Select Monitor.
5AT(diag)-21
Learning Control
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10.Learning Control
A: GENERAL DESCRIPTION
Be sure to perform the {Clear Memory 2} only when the following services are performed. And when the shifting shock is occurred in total check with vehicle driving, perform the learning with following proce-
dures. <Ref. to 5AT(diag)-18, CLEAR MEMORY
MODE, OPERATION, Subaru Select Monitor.>
• Replacement of TCM
• Replacement of transmission assembly
• Replacement of TCM and transmission assembly
CAUTION:
When {Clear Memory 2} is executed, DTC may not be cleared.
B: PROCEDURE
1) Turn the ignition switch to OFF.
2) Turn the air conditioner switch to OFF.
3) Turn the headlight switch to OFF.
4) Turn the rear defogger switch to OFF.
5) Start the engine.
6) Connect the Subaru Select Monitor to the vehicle.
7) Drive the vehicle for 5 — 10 km (3 — 6 miles) to warm up ATF temperature more than 70
°
C (158
°
F).
8) With the throttle opening angle on SUBARU select monitor indicates between 10%
±
2%, shift the gear from 1st
→
2nd, 2nd
→
3rd, 3rd
→
4th, 4th
→
5th while driving the vehicle at “D” range. <Ref. to
5AT(diag)-16, READ CURRENT DATA, OPERA-
9) Repeat the step 8) until reducing of shifting shock was felt.
10) Reducing of shifting shock was not felt though the procedure was repeated 5 cycle, recheck that the learning conditions (throttle opening angle, ATF temperature, etc.) are specified and recheck that other parts are normal.
5AT(diag)-22
SPORT Indicator Light Display
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
11.SPORT Indicator Light Display
A: OPERATION
When any on-board diagnostics item is malfunctioning, the display on the SPORT indicator light blinks from the time the malfunction is detected after starting the engine until the ignition switch is turned OFF. The malfunctioning part or unit can be determined by a DTC during the on-board diagnostics operation. Problems which occurred previously can also be identified through the memory function. If the SPORT indicator light does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the Subaru Select Monitor. Indicator light signal is as shown in the figure.
When the SPORT indicator light does not operates normally though the DTC is not stored, perform the
SPORT indicator light inspection. <Ref. to 5AT(diag)-24, INSPECTION, SPORT Indicator Light Display.>
(A)
(B)
(C)
(1)
(2)
(1)
(2)
(1)
(2)
(3)
(3)
(4)
(A) Ignition switch (Engine OFF)
(1) ON
(2) OFF
(B) Normal (Engine ON)
(3) 2 sec.
(4) 0.25 sec.
(5)
(C) Faulty (Engine ON)
(5) Blink
AT-01750
5AT(diag)-23
SPORT Indicator Light Display
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
B: INSPECTION
DIAGNOSIS:
SPORT indicator light circuit is open or shorted.
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), SPORT indicator light does not illuminate.
WIRING DIAGRAM:
E
SBF-1 SBF-7
IGNITION
SWITCH
SPORT
COMBINATION
METER i10
JOINT
CONNECTOR i77
B: B280 A: i84 BODY INTEGRATED UNIT i10
1 2 3 4 5
11 12 13 14 15 16
6 7 8 9 10
17 18 19 20 21 22
i77
1 2 3 4 5 6 7 8 9 10 11 12
A: i84
1
9
2
24 25
3 4
26 27 28 29
5 6
30 31 32 33
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
34 35
B: B280
1 2 3 4 5 6 7
8 9 10 11 12 13
21 22 23 24 25
14 15 16
26 27
17 18 19 20
28 29 30
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B54 TCM
AT-01452
5AT(diag)-24
1
2
3
4
5
6
7
8
SPORT Indicator Light Display
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK SPORT INDICATOR LIGHT.
Turn the ignition switch to ON.
Check
Does the SPORT indicator light illuminate?
Yes
No
Perform the selfdiagnosis of combination meter.
CHECK SPORT INDICATOR LIGHT.
After the ignition switch is “ON”, wait for at least
2 seconds.
Does the SPORT indicator light illuminate?
CHECK SPORT INDICATOR LIGHT.
Start the engine.
Does the SPORT indicator light go off?
Normal. Go back to “Basic Diagnosis Procedure”.
2, Basic Diagnostics Procedure.>
CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
Connect the Subaru Select Monitor to data link connector.
Is the communication between
Subaru Select Monitor and
TCM normal?
Check the TCM power supply ground circuit and
Subaru Select
Monitor communi-
Diagnostic Procedure for Select
CHECK TCM.
Display the current data of TCM using Subaru
Select Monitor.
Is “Diagnosis light” output signal set to “ON”?
CHECK BODY INTEGRATED UNIT.
Display the current data of body integrated unit using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
CHECK TCM.
1) Start the engine.
2) Display the current data of TCM using Sub-
aru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
CHECK BODY INTEGRATED UNIT.
Display the current data of body integrated unit using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
Is “SPORT light” input signal set to “ON”?
Is “Diagnosis light” output signal set to “ON”?
Is “SPORT light” input signal set to “ON”?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the combination meter assembly. <Ref. to
IDI-16, Combination Meter Assembly.>
Check DTC of body integrated unit. <Ref. to
LAN(diag)-14,
OPERATION,
Subaru Select
Monitor.>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Check DTC of body integrated unit. Perform the diagnosis according to DTC. <Ref. to LAN(diag)-14,
OPERATION,
Subaru Select
Monitor.>
Perform the selfdiagnosis for combination meter.
<Ref. to IDI-3,
INSPECTION,
Combination
Meter System.>
5AT(diag)-25
Diagnostic Procedure for Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
12.Diagnostic Procedure for Select Monitor Communication
A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE
DIAGNOSIS:
Faulty harness connector
TROUBLE SYMPTOM:
Subaru Select Monitor communication failure
WIRING DIAGRAM:
BATTERY
No.13
B357
IGNITION
SWITCH
ACCESSORY
SWITCH
E
B21
E2
1
10
12
13
DATA LINK
CONNECTOR
B40
A: B54 B: B55 TCM
E
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
E E
TRANSMISSION
B40
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
5AT(diag)-26
AT-01453
1
2
3
4
5
6
7
8
Diagnostic Procedure for Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK SUBARU SELECT MONITOR POW-
ER SUPPLY CIRCUIT.
Measure the voltage between data link connector and chassis ground.
Connector & terminal
(B40) No. 1 (+) — Chassis ground (
−
):
CHECK SUBARU SELECT MONITOR
GROUND CIRCUIT.
Measure the resistance of harness between data link connector and chassis ground.
Connector & terminal
(B40) No. 12 — Chassis ground:
(B40) No. 13 — Chassis ground:
Check Yes
Is the voltage more than 10 V? Go to step 2.
Is the resistance less than 1
Ω
?
No
Repair harness connector and connector between battery and data link connector, and poor contact in coupling connector.
Repair the open circuit in harness between data link connector and ground terminal, and poor contact in coupling connector.
CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check whether communication to transmission systems can be executed normally.
Are the name and year of system displayed on Subaru
Select Monitor?
CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Disconnect the TCM connector.
3) Turn the ignition switch to ON.
4) Check whether communication to engine systems can be executed normally.
Are the name and year of system displayed on Subaru
Select Monitor?
CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Connect the TCM connector.
3) Disconnect the ECM connector.
4) Turn the ignition switch to ON.
5) Check whether communication to transmission systems can be executed normally.
Are the name and year of system displayed on Subaru
Select Monitor?
Inspect the ECM.
CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL UNIT AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the TCM and ECM connector.
3) Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B40) No. 10 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK OUTPUT SIGNAL OF TCM.
1) Turn the ignition switch to ON.
2) Measure the voltage between TCM and chassis ground.
Connector & terminal
(B40) No. 10 (+) — Chassis ground (
−
):
Check harness and connector between each control unit and data link connector.
Is the voltage more than 1 V?
Check harness and connector between each control unit and data link connector.
CHECK HARNESS CONNECTOR BETWEEN
TCM AND DATA LINK CONNECTOR.
Measure the resistance between TCM connector and data link connector.
Connector & terminal
(B54) No. 20 — (B40) No. 10:
Is the resistance less than 1
Ω
?
Repair the harness and connector between TCM and data link connector.
5AT(diag)-27
Diagnostic Procedure for Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
9
10
11
12
13
14
15
16
Step
CHECK INSTALLATION OF TCM CONNEC-
TOR.
Turn the ignition switch to OFF.
Is TCM connector connected to TCM?
Check
CHECK INSTALLATION OF TRANSMISSION
HARNESS CONNECTOR.
Is the transmission harness connector connected to bulkhead harness connector?
Yes
No
Connect the TCM connector to TCM.
Connect the bulkhead harness connector to transmission harness connector.
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in control unit power supply and data link connector?
Repair the poor contact.
CHECK POWER SUPPLY OF TCM.
1) Disconnect the connector from TCM.
2) Turn the ignition switch to ON.
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 1 (+) — Chassis ground (
−
):
Is the voltage 10 — 13 V?
CHECK FUSE (No. 32).
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 32).
CHECK HARNESS.
Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B54) No. 1 — Chassis ground:
Is the fuse (No. 32) blown out? Go to step 14.
Is the resistance less than 10
Ω
?
Is the voltage 10 — 13 V?
Repair the open circuit in harness between fuse (No.
32) and TCM, or fuse (No. 32) and battery, and poor contact in coupling connector.
Replace the fuse
(No. 32). If the replaced fuse (No.
32) has blown out easily, repair the short circuit in harness between fuse
(No. 32) and TCM.
Replace the fuse
(No. 32).
CHECK IGNITION POWER SUPPLY CIR-
CUIT.
1) Turn the ignition switch to ON (engine
OFF).
2) Measure the ignition power supply voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 1 (+) — Chassis ground (
−
):
(B55) No. 10 (+) — Chassis ground (
−
):
CHECK FUSE (No. 12).
Remove the fuse (No. 12).
Is the fuse (No. 12) blown out? Replace the fuse
(No. 12). If the replaced fuse (No.
12) has blown out easily, repair the short circuit in harness between fuse
(No. 12) and TCM.
Repair the open circuit in harness between fuse (No.
12) and TCM, or fuse (No. 12) and battery, and poor contact in coupling connector.
5AT(diag)-28
17
18
Diagnostic Procedure for Select Monitor Communication
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 19 — Chassis ground:
(B55) No. 21 — Chassis ground:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in TCM power supply, ground and data link connector?
Repair the connector.
No
Repair the short circuit in harness between TCM and transmission harness connector, and poor contact in coupling connector.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-29
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
13.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC
P0705
P0712
P0713
P0715
P0719
P0720
P0724
P0725
P0731
P0732
P0733
P0734
P0735
P0736
P0741
Transmission Range
Sensor Circuit (PRNDL
Input)
Transmission Fluid Temperature Sensor Circuit
Low Input
Transmission Fluid Temperature Sensor Circuit
High Input
Item
Input/Turbine Speed
Sensor Circuit
Content of diagnosis
Inhibitor switch 1 malfunction, open or short circuit
ATF temperature sensor 1 malfunction, open input signal circuit
ATF temperature sensor 1 malfunction, short input signal circuit
Turbine speed sensor 1 malfunction, short input signal circuit
Reference target
<Ref. to 5AT(diag)-34, DTC P0705 TRANS-
MISSION RANGE SENSOR CIRCUIT (PRNDL
INPUT), Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-39, DTC P0712 TRANS-
MISSION FLUID TEMPERATURE SENSOR
CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-42, DTC P0713 TRANS-
MISSION FLUID TEMPERATURE SENSOR
CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-45, DTC P0715 INPUT/
TURBINE SPEED SENSOR CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
<Ref. to 5AT(diag)-49, DTC P0719 TORQUE
CONVERTER/BRAKE SWITCH “B” CIRCUIT
LOW, Diagnostic Procedure with Diagnostic
Torque Converter/Brake
Switch “B” Circuit Low
Output Speed Sensor
Circuit
Torque Converter/Brake
Switch “B” Circuit High
Engine Speed Input Circuit
Brake switch malfunction, open input signal circuit, body integrated unit malfunction, CAN communication malfunction
Front wheel speed sensor is faulty or input signal circuit, ground, power supply is open or shorted.
Brake switch malfunction, short circuit of input signal, body integrated unit malfunction, CAN communication malfunction
Open or short engine speed output signal circuit, ECM malfunction, CAN communication malfunction
Vehicle sensor, turbine speed sensor, control valve malfunction or shift clutch malfunction
Vehicle sensor, turbine speed sensor, control valve malfunction or shift clutch malfunction
<Ref. to 5AT(diag)-51, DTC P0720 OUTPUT
SPEED SENSOR CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-56, DTC P0724 TORQUE
CONVERTER/BRAKE SWITCH “B” CIRCUIT
HIGH, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-58, DTC P0725 ENGINE
SPEED INPUT CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Gear 1 Incorrect Ratio
Gear 2 Incorrect Ratio
Gear 3 Incorrect Ratio
Gear 4 Incorrect Ratio
Gear 5 Incorrect Ratio
Reverse Incorrect Ratio
Vehicle sensor, turbine speed sensor, or shift clutch malfunction
Vehicle sensor, turbine speed sensor, or shift clutch malfunction
Vehicle sensor, turbine speed sensor, or shift clutch malfunction
Vehicle sensor, turbine speed sensor, or shift clutch malfunction
Torque Converter Clutch
Circuit Performance or
Stuck Off
Lock-up clutch is faulty or valve is stuck.
<Ref. to 5AT(diag)-58, DTC P0731 GEAR 1
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-58, DTC P0732 GEAR 2
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-58, DTC P0733 GEAR 3
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-58, DTC P0734 GEAR 4
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-58, DTC P0735 GEAR 5
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-59, DTC P0736 REVERSE
INCORRECT RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-60, DTC P0741 TORQUE
CONVERTER CLUTCH CIRCUIT PERFOR-
MANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-30
DTC
P0743
P0748
P0751
P0753
P0756
P0758
P0761
P0763
P0766
P0768
P0771
P0773
P0801
P0817
P0882
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Torque Converter Clutch
Circuit Electrical
Pressure Control Solenoid “A” Electrical
Shift Solenoid “A” Performance or Stuck Off
Shift Solenoid “A” Electrical
Shift Solenoid “B” Performance or Stuck Off
Shift Solenoid “B” Electrical
Shift Solenoid “C” Performance or Stuck Off
Shift Solenoid “C” Electrical trical trical
Circuit
Item
Shift Solenoid “D” Performance or Stuck Off
Shift Solenoid “D” Elec-
Shift Solenoid “E” Performance or Stuck Off
Shift Solenoid “E” Elec-
Reverse Inhibit Control
Starter Disable Circuit
PVIGN Power Supply
Circuit (Low)
Content of diagnosis
L/U solenoid circuit malfunction or L/U solenoid body malfunction
Line pressure solenoid circuit malfunction or line pressure solenoid body malfunction
Shift Solenoid “A” performance malfunction
Fr/B solenoid circuit malfunction or Fr/B solenoid body malfunction
Shift Solenoid “B” Performance malfunction
I/C solenoid circuit malfunction or
I/C solenoid body malfunction
H&LR/C solenoid malfunction
H&LR/C solenoid circuit malfunction or H&LR/C solenoid body malfunction
D/C solenoid malfunction
D/C solenoid circuit malfunction or D/C solenoid body malfunction
LC/B solenoid malfunction
Reference target
<Ref. to 5AT(diag)-61, DTC P0743 TORQUE
CONVERTER CLUTCH CIRCUIT ELECTRI-
CAL, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-63, DTC P0748 PRES-
SURE CONTROL SOLENOID “A” ELECTRI-
CAL, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-65, DTC P0751 SHIFT
SOLENOID “A” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-69, DTC P0753 SHIFT
SOLENOID “A” ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-72, DTC P0756 SHIFT
SOLENOID “B” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-75, DTC P0758 SHIFT
SOLENOID “B” ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-78, DTC P0761 SHIFT
SOLENOID “C” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-82, DTC P0763 SHIFT
SOLENOID “C” ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-85, DTC P0766 SHIFT
SOLENOID “D” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-88, DTC P0768 SHIFT
SOLENOID “D” ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-91, DTC P0771 SHIFT
SOLENOID “E” PERFORMANCE OR STUCK
OFF, Diagnostic Procedure with Diagnostic
• LC/B solenoid circuit malfunction or LC/B solenoid body malfunction
• OFF malfunction of PVIGN relay circuit or relay body
• Shift lock solenoid is faulty or output signal circuit is open or shorted.
• Brown out of TCM+B fuse
• PN signal output circuit is open or shorted.
• ECM Source Voltage Is Abnormal
• Brown out of TCM+B fuse
PVIGN relay output circuit is open, shorted or relay malfunction
<Ref. to 5AT(diag)-94, DTC P0773 SHIFT
SOLENOID “E” ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-97, DTC P0801 REVERSE
INHIBIT CONTROL CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-100, DTC P0817 STARTER
DISABLE CIRCUIT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-102, DTC P0882 TCM
POWER INPUT SIGNAL LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-31
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
DTC
P0957
P0958
P1601
P1706
P1707
P1710
P1716
P1717
P1718
P1760
P1761
P1762
P1798
P1799
P1817
Backup Light Relay Circuit Low
Backup Light Relay Circuit High
TCM Communication
Malfunction
AT Vehicle Speed Sensor Circuit Malfunction
(Rear Wheel)
AT AWD Solenoid Valve
Circuit Malfunction
Torque Converter Turbine 2 Speed Signal Circuit 2 Malfunction
ATF Temp. Sensor 2 Circuit Low
ATF Temp. Sensor 2 Circuit High
Lateral Acceleration
Sensor Performance
Problem
Interlock
Item
AT CAN Communication
Circuit
Lateral Acceleration
Sensor Circuit Low
Lateral Acceleration
Sensor Circuit High
Gear 1 Engine Brake
SPORTS Mode Switch
Circuit (Manual Switch)
Content of diagnosis
Back-up relay output circuit is open, shorted or relay OFF malfunction
Back-up relay output circuit is open, shorted or relay ON malfunction
Communication Failure between
TCM and Memory Box
Rear wheel speed sensor is faulty or input circuit, ground, power supply is open or shorted.
AWD solenoid circuit malfunction or AWD solenoid body malfunction
Torque converter sensor 2 malfunction, input circuit, ground, power open, short circuit
ATF temperature sensor 2 malfunction, open input signal circuit
ATF temperature sensor 2 malfunction, short input signal circuit
Reference target
<Ref. to 5AT(diag)-104, DTC P0957 BACKUP
LIGHT RELAY CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-106, DTC P0958 BACKUP
LIGHT RELAY CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-108, DTC P1601 TCM
COMMUNICATION MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code
<Ref. to 5AT(diag)-110, DTC P1706 AT VEHI-
CLE SPEED SENSOR CIRCUIT MALFUNC-
TION (REAR WHEEL), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-114, DTC P1707 AT AWD
SOLENOID VALVE CIRCUIT MALFUNC-
TION, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-116, DTC P1710 TORQUE
CONVERTER TURBINE 2 SPEED SIGNAL
CIRCUIT 2 MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-120, DTC P1716 ATF
TEMP. SENSOR 2 CIRCUIT LOW, Diagnostic
Procedure with Diagnostic Trouble Code
<Ref. to 5AT(diag)-123, DTC P1717 ATF
TEMP. SENSOR 2 CIRCUIT HIGH, Diagnostic
Procedure with Diagnostic Trouble Code
CAN communication line bus off is open, EUM short circuit, ABS/
VDCCM, integrated CU malfunction
<Ref. to 5AT(diag)-125, DTC P1718 AT CAN
COMMUNICATION CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Lateral G sensor malfunction
Lateral G sensor is faulty or input signal circuit is open.
Lateral G sensor is faulty or input signal circuit is shorted.
Malfunction of clutch oil pressure related to 1st engine brake, solenoid current malfunction
Malfunction of clutch oil pressure which emit interlock, solenoid current malfunction
Manual mode switch is open or shorted, or switch malfunction
<Ref. to 5AT(diag)-126, DTC P1760 LATERAL
ACCELERATION SENSOR PERFORMANCE
PROBLEM, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-129, DTC P1761 LATERAL
ACCELERATION SENSOR CIRCUIT LOW,
Diagnostic Procedure with Diagnostic Trouble
<Ref. to 5AT(diag)-131, DTC P1762 LATERAL
ACCELERATION SENSOR CIRCUIT HIGH,
Diagnostic Procedure with Diagnostic Trouble
<Ref. to 5AT(diag)-133, DTC P1798 GEAR 1
ENGINE BRAKE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-134, DTC P1799 INTER-
LOCK, Diagnostic Procedure with Diagnostic
<Ref. to 5AT(diag)-135, DTC P1817 SPORTS
SWITCH), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-32
DTC
P1840
P1841
P1842
P1843
P1844
List of Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Item
Transmission Fluid Pressure Sensor/Switch A
Circuit
Transmission Fluid Pressure Sensor/Switch B
Circuit
Transmission Fluid Pressure Sensor/Switch C
Circuit
Transmission Fluid Pressure Sensor/Switch D
Circuit
Transmission Fluid Pressure Sensor/Switch E
Circuit
Content of diagnosis
H&LR/C oil pressure switch is open or shorted, or switch malfunction
D/C oil pressure switch is open or shorted, or switch malfunction
Fr/B oil pressure switch is open or shorted, or switch malfunction
I/C oil pressure switch is open or shorted, or switch malfunction
LC/B oil pressure switch is open or shorted, or switch malfunction
Reference target
<Ref. to 5AT(diag)-137, DTC P1840 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH A CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-137, DTC P1841 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH B CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-137, DTC P1842 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH C CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-137, DTC P1843 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH D CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to 5AT(diag)-137, DTC P1844 TRANS-
MISSION FLUID PRESSURE SENSOR/
SWITCH E CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-33
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
14.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT (PRNDL INPUT)
DTC DETECTING CONDITION:
The inhibitor switch is open or short.
TROUBLE SYMPTOM:
• Shift characteristics are erroneous.
• Shift indicator light does not match with select lever.
• Shift indicator light does not illuminate.
• N-D, N-R shock occur.
5AT(diag)-34
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
WIRING DIAGRAM:
SBF-1 SBF-7 No.12
i10
1 2 3 4 5
11 12 13 14 15 16
6 7 8 9 10
17 18 19 20 21 22
COMBINATION
METER i10
P R N D
E i77
1 2 3 4 5 6 7 8 9 10 11 12
JOINT
CONNECTOR i77
A: i84
1
9
2
24 25
3 4
26 27 28 29
5 6
30 31 32 33
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
34 35
BODY INTEGRATED UNIT
A: i84
B: B280
B: B280
1
8
2
9
3
21 22 23 24 25
4 5 6 7
10 11 12 13 14 15 16 17 18 19 20
26 27 28 29 30
B12
T3
A: B54 B: B55 TCM
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B: B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B12
1 2 3 4
5 6 7 8
TRANSMISSION
E
AT-02073
5AT(diag)-35
2
3
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
4
5
6
7
Step
CHECK DTC OF TCM.
Check Yes
Is DTC of AT CAN communication circuit displayed?
Perform the diagnosis according to
DTC.
No
PREPARE SUBARU SELECT MONITOR.
Do you have a Subaru Select
Monitor?
CHECK INHIBITOR SWITCH.
1) Shift the select lever to “P” range.
2) Check input signal of inhibitor SW 1 — 4 and inhibitor SW 3 monitor using Subaru
Select Monitor.
Are all indications High?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance between TCM connector and chassis ground about the item which indicated Low on step 3.
Connector & terminal
(B55) No. 4 — Chassis ground:
(B55) No. 3 — Chassis ground:
(B55) No. 14 — Chassis ground:
(B55) No. 13 — Chassis ground:
(B55) No. 20 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK INHIBITOR SWITCH.
1) Shift the select lever to “D” range.
2) Check input signal of inhibitor SW 1 — 4 and inhibitor SW 3 monitor using Subaru
Select Monitor.
Are all indications High?
Repair the short circuit in harness between TCM connector and chassis ground.
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector about the item which indicated High on step 5.
Connector & terminal
(B55) No. 4 — (B12) No. 4:
(B55) No. 3 — (B12) No. 3:
(B55) No. 14 — (B12) No. 2:
(B55) No. 13 — (B12) No. 1:
(B55) No. 20 — (B12) No. 8:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B55) No. 4 — (B12) No. 4:
(B55) No. 3 — (B12) No. 3:
(B55) No. 14 — (B12) No. 2:
(B55) No. 13 — (B12) No. 1:
(B55) No. 20 — (B12) No. 8:
Is the resistance less than 1
Ω
?
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between TCM connector and transmission connector.
5AT(diag)-36
8
9
10
11
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Disconnect the transmission connector
(B12).
3) Connect the TCM connector.
4) Turn the ignition switch to ON.
5) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 4 — (B54) No. 19:
(B55) No. 3 — (B54) No. 19:
(B55) No. 14 — (B54) No. 19:
(B55) No. 13 — (B54) No. 19:
(B55) No. 20 — (B54) No. 19:
Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B55) No. 4 — Chassis ground:
(B55) No. 3 — Chassis ground:
(B55) No. 14 — Chassis ground:
(B55) No. 13 — Chassis ground:
(B55) No. 20 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the voltage 4 — 6 V for the inhibitor SW 1 — 4?
Is the voltage 3.5 — 5.5 V for the inhibitor SW 3 monitor?
CHECK TCM I/O SIGNAL.
Check I/O signal of power supply, ground and
PVIGN power supply relay.
<Ref. to 5AT(diag)-12, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
Is TCM I/O signal OK?
Yes
No
Repair the short circuit in harness between TCM connector and chassis ground.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
Repair the open circuit in harness between control valve body connector and transmission connector.
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance less than 1
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T3) No. 4 — (T5) No. 6:
(T3) No. 3 — (T5) No. 5:
(T3) No. 2 — (T5) No. 4:
(T3) No. 1 — (T5) No. 3:
(T3) No. 8 — (T5) No. 2:
5AT(diag)-37
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
12
13
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T5) No. 6 — Transmission ground:
(T5) No. 5 — Transmission ground:
(T5) No. 4 — Transmission ground:
(T5) No. 3 — Transmission ground:
(T5) No. 2 — Transmission ground:
Is the resistance more than 1
M
Ω
?
CHECK POOR CONTACT.
Yes
Is there any poor contact in inhibitor SW 1 — 4 or inhibitor
SW 3 monitor circuit?
Repair the poor contact.
No
Repair the short circuit in harness between control valve body connector and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-38
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
B: DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT LOW
INPUT
DTC DETECTING CONDITION:
Input signal circuit of TCM to ATF temperature sensor 1 is opened.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
B54
TCM
B11
T4
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
TRANSMISSION
T5
AT-02037
5AT(diag)-39
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 13 — (B11) No. 12:
(B54) No. 2 — (B11) No. 5:
Is the resistance less than 1
Ω
?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
CHECK ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connectors to transmission and TCM.
3) Turn the ignition switch to ON and start engine.
4) Warm-up the transmission until the ATF temperature reaches to 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Is the resistance 500 — 1,200
Ω
?
5) Disconnect the connector from transmission.
6) Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 5 — (T4) No. 12:
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 5 — (T4) No. 12:
3) Measure the voltage between TCM connector terminals.
Connector & terminal
(B54) No. 2 (+) — (B54) No. 13 (
−
):
Does the resistance value increase while the ATF temperature decreases?
PREPARE SUBARU SELECT MONITOR.
CHECK INPUT SIGNAL FROM TCM.
1) Connect the connector to transmission.
2) Warm-up the transmission until the ATF temperature is approx. 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Do you have a Subaru Select
Monitor?
Is the voltage 0.5 — 1.2 V?
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair the poor contact of harness between
ATF temperature sensor and transmission connector.
5AT(diag)-40
6
7
8
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector.
2) Turn the ignition switch to ON (engine
OFF).
3) Read the ATF temperature using Subaru
Select Monitor.
Check
Does the ATF temperature gradually decrease?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance less than 1
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 12 — (T5) No. 1:
(T4) No. 5 — (T5) No. 16:
CHECK POOR CONTACT.
Is there poor contact in ATF temperature sensor circuit 1?
Yes No
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair the poor contact of harness between
ATF temperature sensor and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-41
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
C: DTC P0713 TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT HIGH
INPUT
DTC DETECTING CONDITION:
Input signal circuit of TCM to ATF temperature sensor 1 is shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
B54
TCM
B11
T4
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
TRANSMISSION
T5
AT-02037
5AT(diag)-42
1
2
3
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 13 — Chassis ground:
(B54) No. 2 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
No
Repair the short circuit in harness between TCM and transmission connector.
CHECK ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connectors to transmission and TCM.
3) Turn the ignition switch to ON and start engine.
4) Warm-up the transmission until the ATF temperature reaches to 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Is the resistance 500 — 1,200
Ω
?
5) Disconnect the connector from transmission.
6) Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 5 — (T4) No. 12:
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 5 — (T4) No. 12:
3) Measure the voltage between TCM connector terminals.
Connector & terminal
(B54) No. 2 (+) — (B54) No. 13 (
−
):
Does the resistance value increase while the ATF temperature decreases?
PREPARE SUBARU SELECT MONITOR.
CHECK INPUT SIGNAL FROM TCM.
1) Connect the connector to transmission.
2) Warm-up the transmission until the ATF temperature is approx. 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Do you have a Subaru Select
Monitor?
Is the voltage 0.5 — 1.2 V?
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair the poor contact of harness between
ATF temperature sensor and transmission connector.
5AT(diag)-43
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6
7
8
Step
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector.
2) Turn the ignition switch to ON (engine
OFF).
3) Read the ATF temperature using Subaru
Select Monitor.
Check
Does the ATF temperature gradually decrease?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance more than 1
M
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T5) No. 1 — Chassis ground:
(T5) No. 16 — Chassis ground:
CHECK POOR CONTACT.
Is there poor contact in ATF temperature sensor circuit 1?
Yes No
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair the poor contact of harness between
ATF temperature sensor and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the short circuit in harness between control valve body connector and transmission connector.
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-44
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
D: DTC P0715 INPUT/TURBINE SPEED SENSOR CIRCUIT
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
• Excessive shift shock.
• Does not shift to 5th
WIRING DIAGRAM:
A: B54
TCM
B: B55
B11
T4
B12
T3
AT1
TURBINE SPEED SENSOR 1
E
A: B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B: B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
B12
1 2 3 4
5 6 7 8
AT1
1 2 3
AT-02074
5AT(diag)-45
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B55) No. 16 — (B12) No. 7:
(B54) No. 16 — (B11) No. 7:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 16 — Chassis ground:
(B54) No. 16 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK TCM POWER SUPPLY OUTPUT.
1) Connect the TCM connector. (Transmission connector is disconnected)
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (
−
):
Is the voltage 10 — 13 V?
CHECK TURBINE SPEED SENSOR INPUT
CIRCUIT OF TCM.
Measure the voltage between TCM connector terminals.
Connector & terminal
(B55) No. 16 (+) — (B54) No. 19 (
−
):
Is the voltage 4 — 6 V?
CHECK TCM I/O SIGNAL.
Check I/O signal of power supply, ground and
PVIGN power supply relay.
<Ref. to 5AT(diag)-12, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
Is TCM I/O signal OK?
CHECK HARNESS ASSEMBLY (TURBINE
SPEED SENSOR GROUND).
Check the installing condition of ground connecting harness of harness assembly (used for both of turbine speed sensor 1, rear vehicle speed sensor).
Is the ground connecting harness connected to transmission body securely?
And there are no excessive damages on harness and terminal?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and chassis ground.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
If the poor installation of ground occurs, install it securely. Replace the transmission assembly when the harness or terminal is damaged.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
5AT(diag)-46
7
8
9
10
11
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK HARNESS ASSEMBLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Disconnect the connector from turbine speed sensor 1.
4) Measure the resistance between transmission connector and turbine speed sensor 1 connector.
Connector & terminal
(T4) No. 7 — (AT1) No. 3:
(T3) No. 7 — (AT1) No. 2:
(AT1) No. 1 — Chassis ground:
Check
Is the resistance less than 1
Ω
?
CHECK HARNESS ASSEMBLY.
Measure the resistance between transmission connector and chassis ground.
Connector & terminal
(T4) No. 7 — Chassis ground:
(T3) No. 7 — Chassis ground:
Is the resistance more than 1
M
Ω
?
PREPARE SUBARU SELECT MONITOR.
Do you have a Subaru Select
Monitor?
Yes
No
Repair the open circuit in harness between TCM and transmission connector, and poor contact in coupling connector.
Repair the short circuit in harness between TCM and transmission connector.
PREPARE OSCILLOSCOPE.
Do you have an oscilloscope?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and set the vehicle in 4th speed driving condition of manual mode.
NOTE:
Turbine speed sensor 1 signal can be measured only on 4th speed.
4) Read the current data of turbine speed sen-
sor 1 using the Subaru Select Monitor. <Ref. to
5AT(diag)-16, READ CURRENT DATA,
OPERATION, Subaru Select Monitor.>
Does the value of the turbine speed sensor 1 change depending on the acceleration, deceleration and shifting range of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
Replace the turbine speed sensor
1. <Ref. to 5AT-57,
Turbine speed sensor 1.>
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
5AT(diag)-47
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
12
13
CHECK INPUT SIGNAL FOR TCM USING
OSCILLOSCOPE.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Step
Raise all wheels off floor.
3) Set the oscilloscope to TCM connector terminals.
Positive probe; (B55) No. 16:
Ground lead; (B54) No. 19:
4) Start the engine, and set the vehicle in 4th speed driving condition of manual mode.
NOTE:
Turbine speed sensor 1 signal can be measured only on 4th speed.
5) Display the pulse signal of turbine speed sensor 1 to oscilloscope, and measure the frequency.
Check
Is the frequency of measured waveform (pulse wave) changed depending on the acceleration, deceleration and shifting range of the vehicle?
Yes No
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
Replace the turbine speed sensor
1. <Ref. to 5AT-57,
Turbine speed sensor 1.>
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and set the vehicle in 4th speed driving condition of manual mode.
NOTE:
Turbine speed sensor 1 signal can be measured only on 4th speed.
4) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 16 (+) — (B54) No. 19 (
−
):
Does the voltage change within the range of 2 — 3 V when driving the vehicle with
4th of manual mode? Is the voltage less than 0.5 V or more than 4.5 V constantly when the vehicle is parked with “P” range?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
Replace the turbine speed sensor
1. <Ref. to 5AT-57,
Turbine speed sensor 1.>
5) Stop the vehicle, and shift the select lever to “P” range.
6) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 16 (+) — (B54) No. 19 (
−
):
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
5AT(diag)-48
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
E: DTC P0719 TORQUE CONVERTER/BRAKE SWITCH “B” CIRCUIT LOW
DTC DETECTING CONDITION:
Brake switch malfunction, open input signal circuit
TROUBLE SYMPTOM:
• Brake down control is not operated at SPORT mode.
• No lock-up occurs at braking.
WIRING DIAGRAM:
E
SBF-1 SBF-3
STOP LIGHT
SWITCH
B64
JOINT
CONNECTOR
B159
BODY INTEGRATED
UNIT
B: B280
C: B281
C: B281
1
8
2
9
3
20 21 22 23
4
24 25 26
5 6 7
10 11 12 13 14 15 16 17 18 19
27 28
B64
1 2
B159
1
5
2
6 7
3 4
8 9
B: B280
1
8
2
9
3
21 22 23 24 25
4 5 6 7
10 11 12 13 14 15 16 17 18 19 20
26 27 28 29 30
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B54 TCM
AT-01629
5AT(diag)-49
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
7
CHECK DTC.
Step Check Yes
Is any of following DTC displayed?
•
AT CAN Communication Circuit
•
Output Speed Sensor Circuit
•
AT Vehicle Speed Sensor
Circuit Malfunction (Rear
Wheel)
Perform the diagnosis according to
DTC.
CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor switch to
ON.
5) Depress the brake pedal.
6) Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
Is the ON displayed?
CHECK TCM.
Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
Is the ON displayed?
No
A temporary poor contact of connector or harness may be the cause.
Check the poor contact.
Replace the TCM
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is the voltage more than 10 V? Go to step 7. Go to step 5.
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Disconnect the connector from body integrated unit.
2) Depress the brake pedal.
3) Measure the voltage between body integrated unit connector and chassis ground.
Connector & terminal
(B281) No. 23 (+) — Chassis ground (
−
):
Repair the open circuit of harness between the body integrated unit and stop light switch.
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STOP LIGHT
SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from stop light switch.
3) Measure the resistance of harness between body integrated unit and stop light switch.
Connector & terminal
(B281) No. 23 — (B64) No. 2:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STOP LIGHT
SWITCH.
Measure the resistance of harness between body integrated unit connector and stop light switch.
Connector & terminal
(B281) No. 23 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK POOR CONTACT.
Is there poor contact in input signal of brake switch?
Repair the poor contact.
Repair the short circuit of harness between the body integrated unit and stop light switch.
Check the body integrated unit.
5AT(diag)-50
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
F: DTC P0720 OUTPUT SPEED SENSOR CIRCUIT
DTC DETECTING CONDITION:
• AT vehicle speed signal is abnormal.
• The harness connector between TCM and vehicle speed sensor is in short or open.
TROUBLE SYMPTOM:
• Deterioration of shifting quality.
• Poor driving performance.
WIRING DIAGRAM:
A: B54
B: B55
TCM
B11
T5
T7
CONTROL
VALVE
TRANSMISSION
FRONT VEHICLE
SPEED SENSOR
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T7
3 2 1
AT-02075
5AT(diag)-51
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 16 — (B11) No. 7:
(B55) No. 7 — (B11) No. 1:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 — Chassis ground:
(B55) No. 7 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and chassis ground.
CHECK TCM POWER SUPPLY OUTPUT.
1) Connect the connector to TCM. (Transmission connector is disconnected)
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (
−
):
CHECK TURBINE SPEED SENSOR INPUT
CIRCUIT OF TCM.
Measure the voltage between TCM connector terminals.
Connector & terminal
(B55) No. 7 (+) — (B54) No. 19 (
−
):
Is the voltage 10 — 13 V?
Is the voltage 4 — 6 V?
CHECK TCM I/O SIGNAL.
Check I/O signal of power supply, ground and
PVIGN power supply relay.
<Ref. to 5AT(diag)-12, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
PREPARE SUBARU SELECT MONITOR.
PREPARE OSCILLOSCOPE.
Is TCM I/O signal OK?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
Do you have a Subaru Select
Monitor?
Do you have an oscilloscope?
5AT(diag)-52
8
9
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and drive it.
4) Read the current data of front wheel speed
using Subaru Select Monitor. <Ref. to
5AT(diag)-16, READ CURRENT DATA,
OPERATION, Subaru Select Monitor.>
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Does the value of the front wheel speed depending on the acceleration and deceleration of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
CHECK INPUT SIGNAL FOR TCM USING
OSCILLOSCOPE.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Set the oscilloscope to TCM connector terminals.
Positive probe; (B55) No. 16:
Ground lead; (B54) No. 19:
4) Start the engine, and drive it.
5) Display the pulse signal of turbine speed sensor 1 to oscilloscope, and measure the frequency.
Is the frequency of measured waveform (pulse wave) changed depending on the acceleration and deceleration of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
5AT(diag)-53
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10
11
12
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and drive it.
4) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 7 (+) — (B54) No. 19 (
−
):
5) Stop the vehicle, and shift the select lever to “P” range.
6) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 7 (+) — (B54) No. 19 (
−
):
Check Yes No
Does the voltage change within the range of 2 — 3 V when vehicle is driving? Is the voltage less than 0.5 V or more than 4.5 V constantly when the vehicle is parked with “P” range?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness between the
ATF temperature sensor and transmission connector.
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance less than 1
Ω
?
Repair the open circuit in harness between control valve body connector and transmission connector.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(B11) No. 7 — (T5) No. 15:
(B11) No. 1 — (T5) No. 14:
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T5) No. 15 — Transmission ground:
(T5) No. 14 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Repair the short circuit in harness between transmission connector and transmission ground.
5AT(diag)-54
13
14
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
CONTROL VALVE BODY AND VEHICLE
SPEED SENSOR.
1) Disconnect the connector from vehicle speed sensor.
2) Measure the resistance of harness between control valve body connector and vehicle speed sensor connector.
Connector & terminal
(T5) No. 15 — (T7) No. 3:
(T5) No. 14 — (T7) No. 2:
(T7) No. 1 — Transmission ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
CONTROL VALVE BODY AND VEHICLE
SPEED SENSOR.
Measure the resistance of harness between control valve body connector and transmission ground.
Connector & terminal
(T5) No. 15 — Transmission ground:
(T5) No. 14 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the vehicle speed sensor.
No
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
G: DTC P0724 TORQUE CONVERTER/BRAKE SWITCH “B” CIRCUIT HIGH
DTC DETECTING CONDITION:
Brake switch malfunction, open input signal circuit
TROUBLE SYMPTOM:
Gear is not shifted down when climbing a hill.
WIRING DIAGRAM:
E
SBF-1 SBF-3
STOP LIGHT
SWITCH
B64
JOINT
CONNECTOR
B159
BODY INTEGRATED
UNIT
B: B280
C: B281
C: B281
1
8
2
9
3
20 21 22 23
4
24 25 26
5 6 7
10 11 12 13 14 15 16 17 18 19
27 28
B64
1 2
B159
1
5
2
6 7
3 4
8 9
B: B280
1
8
2
9
3
21 22 23 24 25
4 5 6 7
10 11 12 13 14 15 16 17 18 19 20
26 27 28 29 30
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B54 TCM
AT-01629
5AT(diag)-56
1
2
3
4
5
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
CHECK DTC.
Step Check Yes
Is any of following DTC detected?
•
AT CAN Communication Circuit
•
Output Speed Sensor Circuit
•
AT Vehicle Speed Sensor
Circuit Malfunction (Rear
Wheel)
Perform the diagnosis according to
DTC.
CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor switch to
ON.
5) Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
Is OFF displayed?
No
CHECK TCM.
Read the data of brake pedal switch using
Subaru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
Is OFF displayed?
A temporary poor contact of connector or harness may be the cause.
Check the poor contact.
Replace the TCM
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is the voltage more than 10 V? Go to step 5. Go to step 7.
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Disconnect the connector from body integrated unit.
2) Measure the voltage between body integrated unit connector and chassis ground.
Connector & terminal
(B281) No. 23 (+) — Chassis ground (
−
):
Replace stop light switch.
CHECK STOP LIGHT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from stop light switch.
3) Measure the resistance of harness between stop light switch connectors.
Terminals
No. 1 — No. 2:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STOP LIGHT
SWITCH.
1) Turn the ignition switch to ON.
2) Measure the voltage of harness between the body integrated unit connector and chassis ground.
Connector & terminal
(B281) No. 23 (+) — Chassis ground (
−
):
Is the voltage less than 1 V?
CHECK POOR CONTACT.
Is there poor contact in input signal of brake switch?
Repair the poor contact.
Repair the short circuit in harness between TCM and stop light switch.
Check the body integrated unit.
5AT(diag)-57
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
H: DTC P0725 ENGINE SPEED INPUT CIRCUIT
DTC DETECTING CONDITION:
Information of engine speed is not correctly received from ECM.
TROUBLE SYMPTOM:
No lock-up (after engine warm-up).
1
2
3
Step
CHECK DTC OF ECM.
CHECK DTC OF TCM.
CHECK DTC OF TCM.
Check Yes
Is DTC of AT CAN communication circuit detected?
Perform the diagnosis according to
DTC.
No
Is DTC of AT CAN communication circuit detected?
Perform the diagnosis according to
DTC.
Is any of following DTC detected?
•
Output Speed Sensor Circuit
•
AT Vehicle Speed Sensor
Circuit Malfunction (Rear
Wheel)
Perform the diagnosis according to
DTC.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
I: DTC P0731 GEAR 1 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. <Ref. to 5AT(diag)-59, DTC P0736 REVERSE INCORRECT
RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
J: DTC P0732 GEAR 2 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. <Ref. to 5AT(diag)-59, DTC P0736 REVERSE INCORRECT
RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
K: DTC P0733 GEAR 3 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. <Ref. to 5AT(diag)-59, DTC P0736 REVERSE INCORRECT
RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
L: DTC P0734 GEAR 4 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. <Ref. to 5AT(diag)-59, DTC P0736 REVERSE INCORRECT
RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
M: DTC P0735 GEAR 5 INCORRECT RATIO
NOTE:
Refer to DTC P0736 for diagnostic procedure. <Ref. to 5AT(diag)-59, DTC P0736 REVERSE INCORRECT
RATIO, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-58
2
3
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
N: DTC P0736 REVERSE INCORRECT RATIO
DTC DETECTING CONDITION:
Vehicle speed sensor, turbine speed sensor or control valve malfunction
TROUBLE SYMPTOM:
• Shift point is too high or too low.
• Excessive shift shock.
• Tight corner braking phenomenon is occurred.
• Gear is not shifted to reverse.
• Gear position is held by fail safe function.
• Vehicle does not run.
1
4
5
6
7
Step
CHECK DTC OF TCM.
PREPARE SUBARU SELECT MONITOR.
CHECK ENGINE SPEED.
Compare the meter with Subaru Select Monitor indications.
CHECK TURBINE SPEED SENSOR.
Check the indication of Subaru Select Monitor.
CHECK FRONT AND REAR VEHICLE
SPEED SENSOR.
CHECK INHIBITOR SWITCH.
CHECK AFTER REPAIR.
Is the indication of Subaru
Select Monitor and meter matches?
Check Yes
Is any of following DTC detected?
•
AT CAN Communication Circuit
•
Engine Speed Input Circuit
Range/Performance
•
Input/Turbine Speed Sensor
Circuit
•
Torque Converter Turbine 2
Speed Signal Circuit 2 Malfunction
•
Output Speed Sensor Circuit
•
AT Vehicle Speed Sensor
Circuit Malfunction (Rear
Wheel)
•
Transmission Range Sensor
Circuit (PRNDL Input)
•
PVIGN Power Supply Circuit (Low)
Perform the diagnosis according to
DTC.
Do you have a Subaru Select
Monitor?
Is the indication of Subaru
Select Monitor and meter matches?
Perform the diagnosis according to
DTC P0725.
Is the indication changes according to acceleration, braking and shifting?
No
Perform the diagnosis according to
DTC P0715,
P1710.
Perform the diagnosis according to
DTC P0720,
P1706.
Is the indication of Subaru
Select Monitor and meter matches?
Is DTC displayed?
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Perform the diagnosis according to
DTC P0705.
Temporary poor contact occurs.
5AT(diag)-59
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
O: DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR
STUCK OFF
DTC DETECTING CONDITION:
• Lock up clutch malfunction
• Locking of bulb
TROUBLE SYMPTOM:
No lock-up occurs. (After engine is warmed-up)
1
2
3
4
5
Step
CHECK DTC OF TCM.
CHECK DTC OF TCM.
1) Perform the clear memory mode. <Ref. to
5AT(diag)-18, CLEAR MEMORY MODE,
OPERATION, Subaru Select Monitor.>
2) Read DTC.
CHECK INHIBITOR SWITCH CIRCUIT.
Diagnose according to DTC P0705 procedure.
Check
Is any of following DTC detected?
•
AT CAN Communication Circuit
•
Engine Speed Input Circuit
•
Input/Turbine Speed Sensor
Circuit
•
Torque Converter Turbine 2
Speed Signal Circuit 2 Malfunction
Is DTC displayed?
Yes
Perform the diagnosis according to each DTC.
No
Perform the diagnosis according to
DTC.
Is there any trouble?
CHECK STOP LIGHT SWITCH CIRCUIT.
Diagnose according to DTC P0719 and P0724 procedure.
CHECK ATF TEMPERATURE SENSOR CIR-
CUIT.
Diagnose according to DTC P0712, P0713,
P1716 and P1717 procedure.
Is there any trouble?
Is there any trouble?
Repair or replace the inhibitor switch circuit.
Repair or replace the stop light switch circuit.
Repair or replace the ATF temperature sensor circuit.
There are malfunctions in TCM,
TCM connector poor contact or transmission assembly mechanical malfunction.
5AT(diag)-60
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
P: DTC P0743 TORQUE CONVERTER CLUTCH CIRCUIT ELECTRICAL
DTC DETECTING CONDITION:
The output signal circuit of lock up solenoid is open or shorted.
TROUBLE SYMPTOM:
No lock-up (after engine warm-up).
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5 6 7 8
3 4
9 10 11 12
T6
TRANSMISSION
AT-02076
5AT(diag)-61
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
7
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 23 — (B11) No. 20:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 23 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 20 — (T6) No. 6:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 6 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK LOCK-UP SOLENOID.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 6 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Is DTC displayed?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-62
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Q: DTC P0748 PRESSURE CONTROL SOLENOID “A” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of line pressure solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5 6 7 8
3 4
9 10 11 12
T6
TRANSMISSION
AT-02077
5AT(diag)-63
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
7
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 9 — (B11) No. 19:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 19 — (T6) No. 7:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 7 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK LINE PRESSURE SOLENOID.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 7 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Is DTC displayed?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-64
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
R: DTC P0751 SHIFT SOLENOID “A” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal of front brake solenoid does not match with oil pressure.
TROUBLE SYMPTOM:
Locked to 4th or 5th gear.
WIRING DIAGRAM:
TCM
A: B54
B: B55
T5
T6
TRANSMISSION
B11
T4
E
A:
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02078
5AT(diag)-65
3
4
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
5
6
7
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 24 — (B11) No. 17:
(B55) No. 17 — (B11) No. 3:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 24 — Chassis ground:
(B55) No. 17 — Chassis ground:
Is the resistance more than 1
M
Ω
?
PREPARE SUBARU SELECT MONITOR.
Do you have a Subaru Select
Monitor?
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of Fr/B oil pressure SW.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 4th speed with checking current gear position using Subaru Select Monitor.
4) Check input signal of Fr/B oil pressure SW.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 1st speed with checking current gear position using Subaru Select Monitor.
4) Check input signal of Fr/B oil pressure SW.
Is OFF displayed?
Is the ON displayed?
Is the voltage 10 — 13 V?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT
indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 17 (+) — Chassis ground (
−
):
5AT(diag)-66
8
9
10
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 4th speed of manual mode with checking indication of gear position in combination meter.
NOTE:
Read the value of gear position indication after the shifting is completed (approx. 2 seconds later from shifting).
Check
Is the voltage 10 — 13 V?
Yes
No
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
4) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 17 (+) — Chassis ground (
−
):
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 1st speed of manual mode with checking indication of gear position in combination meter.
NOTE:
Read the value of gear position indication after the shifting is completed (approx. 2 seconds later from shifting).
4) Measure the voltage of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 17 (+) — Chassis ground (
−
):
Is the voltage less than 1.5 V? Even if the SPORT indicator lights blinks, the system
is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(B11) No. 17 — (T6) No. 10:
(B11) No. 3 — (T6) No. 11:
Is the resistance less than 1
Ω
?
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
Repair the open circuit in harness between control valve body connector and transmission connector.
5AT(diag)-67
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
11
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 10 — Transmission ground:
(T5) No. 11 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
No
Repair the short circuit in harness between control valve body connector and transmission connector.
5AT(diag)-68
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
S: DTC P0753 SHIFT SOLENOID “A” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of front brake solenoid is open or shorted.
TROUBLE SYMPTOM:
Locked to 4th or 5th gear.
WIRING DIAGRAM:
TCM
A: B54
B: B55
T5
T6
TRANSMISSION
B11
T4
E
A:
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02078
5AT(diag)-69
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 24 — (B11) No. 17:
(B55) No. 17 — (B11) No. 3:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 24 — Chassis ground:
(B55) No. 17 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 17 — (T6) No. 9:
(T4) No. 3 — (T5) No. 11:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 9 — Transmission ground:
(T5) No. 11 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK FRONT BRAKE SOLENOID.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 9 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-70
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Check
Is DTC displayed?
Yes
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-71
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
T: DTC P0756 SHIFT SOLENOID “B” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal value of input clutch solenoid and oil pressure does not match.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
T5
T6
TRANSMISSION
AT-02079
5AT(diag)-72
1
2
3
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 18 — (B11) No. 18:
(B54) No. 6 — (B11) No. 11:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 18 — Chassis ground:
(B54) No. 6 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of I/C oil pressure SW.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to “D” range and brake ON (1st) with checking current gear position using Subaru
Select Monitor.
4) Check input signal of I/C oil pressure SW.
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Drive the vehicle on 4th speed of “D” range with checking current gear position using Subaru Select Monitor.
4) Check input signal of I/C oil pressure SW.
Is the ON displayed?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT indicator lights
blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
5AT(diag)-73
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6
7
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 18 — (T6) No. 8:
(T4) No. 11 — (T5) No. 8:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T4) No. 18 — Transmission ground:
(T4) No. 11 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
No
Repair the open circuit in harness between control valve body connector and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the short circuit in harness between control valve body connector and transmission connector.
5AT(diag)-74
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
U: DTC P0758 SHIFT SOLENOID “B” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of input clutch solenoid is open or shorted.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
T5
T6
TRANSMISSION
AT-02079
5AT(diag)-75
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 18 — (B11) No. 18:
(B54) No. 6 — (B11) No. 11:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND BODY HARNESS.
Measure resistance of harness between TCM connector and body harness.
Connector & terminal
(B54) No. 18 — Chassis ground:
(B54) No. 6 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 18 — (T6) No. 8:
(T4) No. 11 — (T5) No. 8:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 8 — Chassis ground:
(T5) No. 8 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK INPUT CLUTCH SOLENOID.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 8 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-76
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Check
Is DTC displayed?
Yes
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-77
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
V: DTC P0761 SHIFT SOLENOID “C” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal value of high & low reverse clutch solenoid and oil pressure does not match.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
A: B54
B: B55
T5
T6
TRANSMISSION
B11
T4
E
A:
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02080
5AT(diag)-78
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 17 — (B11) No. 15:
(B55) No. 8 — (B11) No. 4:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 17 — Chassis ground:
(B55) No. 8 — Chassis ground:
Is the resistance more than 1
M
Ω
?
PREPARE SUBARU SELECT MONITOR.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to “D” range and brake ON (1st) with checking current gear position using Subaru
Select Monitor.
4) Check input signal of H&LR/C oil pressure
SW.
Do you have a Subaru Select
Monitor?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of H&LR/C oil pressure
SW.
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Drive the vehicle on 2nd speed of “D” range with checking current gear position using Subaru Select Monitor.
4) Check input signal of H&LR/C oil pressure
SW.
Is OFF displayed?
Is the ON displayed?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT indicator lights
blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
5AT(diag)-79
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7
8
9
10
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 8 (+) — Chassis ground (
−
):
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 2nd speed of manual mode with checking indication of gear position in combination meter.
Check
Is the voltage 10 — 13 V?
Is the voltage 10 — 13 V?
Yes
No
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
NOTE:
Read the value of gear position indication after the shifting is completed (approx. 2 seconds later from shifting).
4) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 8 (+) — Chassis ground (
−
):
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 1st speed of manual mode with checking indication of gear position in combination meter.
NOTE:
Read the value of gear position indication after the shifting is completed (approx. 2 seconds later from shifting).
4) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 8 (+) — Chassis ground (
−
):
Is the voltage less than 1.5 V? Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 15 — (T6) No. 12:
(T4) No. 4 — (T5) No. 12:
Is the resistance less than 1
Ω
?
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
Repair the open circuit in harness between control valve body connector and transmission connector.
5AT(diag)-80
11
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T4) No. 15 — Transmission ground:
(T4) No. 4 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
No
Repair the short circuit in harness between control valve body connector and transmission connector.
5AT(diag)-81
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
W: DTC P0763 SHIFT SOLENOID “C” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of high & low reverse clutch solenoid is open or shorted.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
A: B54
B: B55
T5
T6
TRANSMISSION
B11
T4
E
A:
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02080
5AT(diag)-82
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 17 — (B11) No. 15:
(B55) No. 8 — (B11) No. 4:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 17 — Chassis ground:
(B55) No. 8 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 15 — (T6) No. 12:
(T4) No. 4 — (T5) No. 12:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance of harness connector between control valve body connector and chassis ground.
Connector & terminal
(T6) No. 12 — Chassis ground:
(T5) No. 12 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK HIGH & LOW REVERSE CLUTCH
SOLENOID.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 12 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-83
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7
Step
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Check
Is DTC displayed?
Yes
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-84
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
X: DTC P0766 SHIFT SOLENOID “D” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal value of direct clutch solenoid and oil pressure does not match.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5 6 7 8
3 4
9 10 11 12
T5
T6
TRANSMISSION
AT-02081
5AT(diag)-85
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 22 — (B11) No. 16:
(B54) No. 21 — (B11) No. 10:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND BODY HARNESS.
Measure resistance of harness between TCM connector and body harness.
Connector & terminal
(B54) No. 22 — Chassis ground:
(B54) No. 21 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of D/C oil pressure SW.
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to “D” range and brake ON (1st) with checking current gear position using Subaru
Select Monitor.
4) Check input signal of D/C oil pressure SW.
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 2nd speed of manual mode and brake ON with checking current gear position using Subaru Select Monitor.
4) Check input signal of D/C oil pressure SW.
Is the ON displayed?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT indicator lights
blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
5AT(diag)-86
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 16 — (T6) No. 10:
(T4) No. 10 — (T5) No. 9:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 10 — Chassis ground:
(T5) No. 9 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
No
Repair the open circuit in harness between control valve body connector and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the short circuit in harness between control valve body connector and transmission connector.
5AT(diag)-87
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Y: DTC P0768 SHIFT SOLENOID “D” ELECTRICAL
DTC DETECTING CONDITION:
The output signal circuit of direct clutch solenoid is open or shorted.
TROUBLE SYMPTOM:
Locked to 4th gear.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5 6 7 8
3 4
9 10 11 12
T5
T6
TRANSMISSION
AT-02081
5AT(diag)-88
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 22 — (B11) No. 16:
(B54) No. 21 — (B11) No. 10:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 22 — Chassis ground:
(B54) No. 21 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 16 — (T6) No. 10:
(T4) No. 10 — (T5) No. 9:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 10 — Chassis ground:
(T5) No. 9 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
CHECK DIRECT CLUTCH SOLENOID.
Measure the resistance of harness connector between control valve body connector and transmission ground.
Connector & terminal
(T6) No. 10 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-89
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7
Step
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Check
Is DTC displayed?
Yes
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-90
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Z: DTC P0771 SHIFT SOLENOID “E” PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION:
Output signal value of low coast brake solenoid and oil pressure does not match.
TROUBLE SYMPTOM:
• Locked to 2nd gear.
• Engine brake does not function at 1st or 2nd of manual mode.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5
6 7 8
3 4
9 10 11 12
T5 T6
TRANSMISSION
AT-02082
5AT(diag)-91
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 15 — (B11) No. 13:
(B54) No. 12 — (B11) No. 9:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B54) No. 15 — Chassis ground:
(B54) No. 12 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of LC/B oil pressure SW.
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to 3rd speed with checking current gear position using Subaru Select Monitor.
4) Check input signal of LC/B oil pressure SW.
Is OFF displayed?
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Drive the vehicle on 2nd speed of manual mode 15 km/h (9 MPH) with checking current gear position using Subaru Select Monitor.
4) Check input signal of LC/B oil pressure SW.
Is the ON displayed?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT
indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact of harness in the solenoid output and oil pressure SW input.
5AT(diag)-92
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 13 — (T6) No. 13:
(T4) No. 9 — (T5) No. 10:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 13 — Chassis ground:
(T5) No. 10 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
No
Repair the open circuit in harness between control valve body connector and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the short circuit in harness between control valve body connector and transmission connector.
5AT(diag)-93
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AA:DTC P0773 SHIFT SOLENOID “E” ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of low coast brake solenoid is open or shorted.
TROUBLE SYMPTOM:
• Locked to 2nd gear.
• Engine brake does not function at 1st or 2nd of manual mode.
WIRING DIAGRAM:
TCM
B54
B11
T4
E
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5
6 7 8
3 4
9 10 11 12
T5 T6
TRANSMISSION
AT-02082
5AT(diag)-94
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 15 — (B11) No. 13:
(B54) No. 12 — (B11) No. 9:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND BODY HARNESS.
Measure resistance of harness between TCM connector and body harness.
Connector & terminal
(B54) No. 15 — Chassis ground:
(B54) No. 12 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 13 — (T6) No. 13:
(T4) No. 9 — (T5) No. 10:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between chassis ground and control valve body connector.
Connector & terminal
(T6) No. 13 — Chassis ground:
(T5) No. 10 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK LOW COAST BRAKE SOLENOID.
Measure the resistance of harness connector between control valve body connector and transmission ground.
Connector & terminal
(T6) No. 13 — Transmission ground:
Is the resistance between 5 —
17
Ω
?
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
5AT(diag)-95
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7
Step
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Check
Is DTC displayed?
Yes
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-96
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AB:DTC P0801 REVERSE INHIBIT CONTROL CIRCUIT
DTC DETECTING CONDITION:
Shift lock solenoid malfunction, open or short reverse inhibitor control circuit
TROUBLE SYMPTOM:
• Gear is shifted from “N” range to “R” range during driving at 20 km/h 12 MPH) or more.
• Gear can not be shifted from “N” range to “R” range though the vehicle is parked.
WIRING DIAGRAM:
TCM
B55
B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B116
1 2 3 4
5 6 7 8 9 10
BODY INTEGRATED UNIT
B116
3
4
SHIFT LOCK
SOLENOID
E
AT-01536
5AT(diag)-97
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
Step
CHECK FUSE (No. 32).
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 32).
CHECK OUTPUT SIGNAL OF TCM.
1) Turn the ignition switch to ON.
2) With the brake pedal depressed, shift the select lever to “D” range.
3) Measure the voltage between TCM and chassis ground.
Connector & terminal
(B55) No. 15 (+) — Chassis ground (
−
):
Check
Is the voltage more than 10.5
V?
Yes No
Is the fuse (No. 32) blown out? Replace the fuse
(No. 32). If the replaced fuse has blown out easily, repair the short circuit in harness between fuse (No.
32) and TCM.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
CHECK HARNESS CONNECTOR BETWEEN
TCM AND SHIFT LOCK SOLENOID.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and shift lock solenoid.
3) Measure the resistance of harness between TCM and shift lock solenoid connector.
Connector & terminal
(B55) No. 15 — (B116) No. 3:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND SHIFT LOCK SOLENOID.
Measure the voltage of harness between TCM and chassis ground.
Connector & terminal
(B55) No. 15 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS BETWEEN SHIFT LOCK
SOLENOID AND CHASSIS GROUND TERMI-
NAL.
Measure the resistance of harness between shift lock solenoid and chassis ground.
Connector & terminal
(B116) No. 4 — Chassis ground:
Is the resistance less than 1
Ω
?
Is the resistance 7 — 21
Ω
?
CHECK SHIFT LOCK SOLENOID.
Measure the resistance of shift lock solenoid terminals.
Connector & terminal
(B116) No. 3 — No. 4:
Repair the open circuit in harness between TCM and shift lock solenoid connector.
Repair the short circuit in harness between TCM and shift lock solenoid connector.
Repair the open circuit in harness between chassis ground and shift lock solenoid connector.
Replace the shift lock solenoid.
5AT(diag)-98
7
8
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes No
CHECK OUTPUT SIGNAL OF TCM.
1) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
2) Start the engine.
3) Shift the select lever to “D” range and slowly increase vehicle speed to 20 km/h (12
MPH).
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Is the voltage less than 1 V?
Even if the SPORT
indicator lights up, the circuit has returned to normal condition at this time. A temporary poor contact of connector or harness may be the cause. Repair harness or connector in reverse inhibitor control circuit.
4) Measure the voltage between TCM and chassis ground.
Connector & terminal
(B55) No. 15 (+) — Chassis ground (
−
):
CHECK POOR CONTACT.
Is there poor contact in the reverse inhibitor control circuit?
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-99
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AC:DTC P0817 STARTER DISABLE CIRCUIT
DTC DETECTING CONDITION:
Open or short in P/N signal output circuit
TROUBLE SYMPTOM:
• Engine can be started on other than “P” or “N” range
• Engine can not be started on “P” or “N” range
WIRING DIAGRAM:
ECM
B137
B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B137
8
1
9
2
10
3 5 6 7
11 12 13 14 15
18 19 20 21
26 27
4
22 23
28 29
16 17
24 25
30 31
B55
TCM
AT-01632
5AT(diag)-100
1
2
3
4
5
6
7
8
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK DTC OF TCM.
CHECK TCM OUTPUT SIGNAL.
1) Shift the select lever to “D” range.
2) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 19 (+) — Chassis ground (
−
):
CHECK POOR CONTACT.
Check Yes
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input) circuit detected?
Perform the diagnosis according to
DTC.
No
CHECK ECM.
CHECK FUSE (No. 32).
1) Turn the ignition switch to OFF.
2) Remove the fuse.
Is the communication between
Subaru Select Monitor and
ECM normal?
Is the fuse (No. 32) blown out? Replace the fuse
(No. 32). If the replaced fuse (No.
32) has blown out easily, repair the short circuit in harness between fuse
(No. 32) and TCM.
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B55) No. 19 — (B137) No. 9:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 19 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the voltage more than 10 V? Go to step 7.
CHECK TCM OUTPUT SIGNAL.
1) Connect the TCM and ECM connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Shift the select lever to “P” range.
4) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 19 (+) — Chassis ground (
−
):
Perform the diagnosis according to
DTC concerning
ECM.
Repair the open circuit in harness between TCM and transmission connector, and poor contact in coupling connector.
Repair the short circuit in harness between transmission connector and chassis ground.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is the voltage less than 1 V?
Is there any open or poor contact of connector (loosing terminal, entering foreign matter, damaging connector body)?
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Check neutral circuit inside the
ECM.
5AT(diag)-101
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AD:DTC P0882 TCM POWER INPUT SIGNAL LOW
DTC DETECTING CONDITION:
Malfunction of PVIGN power supply relay or open, short circuit of PVIGN power supply circuit.
TROUBLE SYMPTOM:
Gear is not changed.
WIRING DIAGRAM:
SBF-1 SBF-9
IGNITION
SWITCH
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B357
E
B357
B54 TCM
AT-01630
5AT(diag)-102
1
2
3
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the SBF 1, SBF 2 and fuse (No.
12), and then check those are not blown out.
Check
Is the fuse blown out?
CHECK INPUT VOLTAGE FOR PVIGN RE-
LAY.
Measure the voltage between PVIGN relay and chassis ground.
Connector & terminal
(B357) No. 2 (+) — Chassis ground (
−
):
(B357) No. 3 (+) — Chassis ground (
−
):
Is the voltage 10 — 13 V?
Yes No
Replace the fuse.
If the replaced fuse has blown out easily, repair the short circuit in harness of each fuse.
Check open circuit in harness between fuse (No.
12) and PVIGN relay.
CHECK HARNESS BETWEEN PVIGN RE-
LAY OF TCM.
Measure the resistance between TCM connector and PVIGN relay connector.
Connector & terminal
(B54) No. 10 — (B357) No. 1:
(B54) No. 7 — (B357) No. 4:
(B54) No. 8 — (B357) No. 4:
Is the resistance less than 1
Ω
?
Is the voltage 10 — 13 V?
CHECK PVIGN POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground (
−
):
(B54) No. 8 (+) — Chassis ground (
−
):
CHECK PVIGN RELAY OUTPUT OF TCM.
Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 (+) — Chassis ground (
−
):
Repair the open circuit of harness.
Temporary poor contact. Recheck the harness between TCM and relay. (Lightly move the harness and check that the open or short circuit is not occurred.)
Is the voltage less than 1.5 V? Replace the
PVIGN relay.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-103
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AE:DTC P0957 BACKUP LIGHT RELAY CIRCUIT LOW
DTC DETECTING CONDITION:
Short circuit of back-up light relay output circuit
TROUBLE SYMPTOM:
Back-up light does not illuminate in “R” range.
WIRING DIAGRAM:
SBF-1 SBF-9
IGNITION
RELAY
B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B356
1 2
3
4
E
B356
BACKUP LIGHT CIRCUIT
B55 TCM
AT-01631
5AT(diag)-104
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK DTC OF TCM.
CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and backup light relay.
3) Measure the resistance of harness between TCM and backup light relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (engine
OFF)
2) Shift the select lever to “P” range.
Check Yes
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input) circuit detected?
Perform the diagnosis according to
DTC.
No
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the voltage more than 10 V? Go to step 5.
Repair the open circuit in harness between TCM and transmission connector, and poor contact in coupling connector.
Repair the short circuit in harness between TCM and transmission connector.
CHECK TCM OUTPUT SIGNAL.
Shift the select lever to “R” range.
CHECK INPUT VOLTAGE FOR BACKUP
LIGHT RELAY.
Measure the voltage between back-up light relay and chassis ground.
Is the voltage less than 1 V?
Is the voltage 10 — 13 V?
Replace the backup light relay.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Check open or short circuit in harness between fuse
(No. 18) and backup light relay.
5AT(diag)-105
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AF:DTC P0958 BACKUP LIGHT RELAY CIRCUIT HIGH
DTC DETECTING CONDITION:
Back-up light relay malfunction, or open/short circuit in back-up light relay output circuit
TROUBLE SYMPTOM:
• Back-up light does not illuminate in “R” range.
• Back-up light always illuminate in other than “R” range.
WIRING DIAGRAM:
SBF-1 SBF-9
IGNITION
RELAY
B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B356
1 2
3
4
E
B356
BACKUP LIGHT CIRCUIT
B55 TCM
AT-01631
5AT(diag)-106
1
2
3
4
5
6
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK DTC OF TCM.
CHECK HARNESS CONNECTOR BETWEEN
TCM AND BACK-UP LIGHT RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and back-up light relay.
3) Measure the resistance of harness between TCM and back-up light relay connector.
Connector & terminal
(B55) No. 11 — (B356) No. 1:
CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (engine
OFF)
2) Shift the select lever to “P” range.
Check Yes
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input) circuit detected?
Perform the diagnosis according to
DTC.
No
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 11 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Is the voltage more than 10 V? Go to step 5.
Repair the open circuit in harness between TCM and transmission connector, and poor contact in coupling connector.
Repair the short circuit in harness between TCM and transmission connector.
CHECK TCM OUTPUT SIGNAL.
Shift the select lever to “R” range.
CHECK INPUT VOLTAGE FOR BACK-UP
LIGHT RELAY.
Measure the voltage between back-up light relay and chassis ground.
Is the voltage less than 1 V?
Is the voltage 10 — 13 V?
Replace the backup light relay.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Check open or short circuit in harness between fuse
(No. 18) and backup light relay.
5AT(diag)-107
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AG:DTC P1601 TCM COMMUNICATION MALFUNCTION
DTC DETECTING CONDITION:
Communication does not complete between control valve memory box.
TROUBLE SYMPTOM:
Shifting quality malfunction
WIRING DIAGRAM:
B54 TCM
B11
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
TRANSMISSION
T5
1
2
AT-01800
Step
CHECK POOR CONTACT OF TRANSMIS-
SION CONNECTOR.
Check loose connection on TCM connector
(B54).
CHECK DTC OF TCM.
Check
Is there poor contact on connector?
Yes
No
Connect it securely.
Is DTC of oil pressure switch detected?
Perform the diagnosis according to
DTC.
5AT(diag)-108
3
4
5
6
7
8
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (
−
):
Check
Is the voltage 10 — 13 V?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 12 — (B11) No. 9:
(B54) No. 21 — (B11) No. 10:
(B54) No. 6 — (B11) No. 11:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 12 — Chassis ground:
(B54) No. 21 — Chassis ground:
(B54) No. 6 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(B54) No. 9 — (T5) No. 10:
(B54) No. 10 — (T5) No. 9:
(B54) No. 11 — (T5) No. 8:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission connector and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
(B54) No. 10 — Chassis ground:
(B54) No. 11 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK POOR CONTACT.
NOTE:
Data communication malfunction is detected when the malfunction occurred on inspection area above while transmission assembly is replacing or “Clear Memory 2” is performing.
When the repair is performed with following diagnosis above, perform the “Clear Memory 2”, and then recheck that the DTC of TCM data communication malfunction is not detected.
Is there any open or poor contact of connector (loosing terminal, entering foreign matter, damaging connector body)?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM and transmission connector, and poor contact in coupling connector.
Repair the short circuit in harness between TCM and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission connector.
Replace the transmission assembly.
<Ref. to 5AT-38,
Automatic Transmission Assembly.>
5AT(diag)-109
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AH:DTC P1706 AT VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION (REAR
WHEEL)
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
• Shifting quality malfunction
• Tight corner braking phenomenon is occurred.
WIRING DIAGRAM:
A: B54
TCM
B: B55
A: B11
B: B12
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
A: B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
B: B12
1 2 3 4
5 6 7 8
E
REAR VEHICLE
SPEED SENSOR
AT-01537
5AT(diag)-110
1
2
3
4
5
6
7
8
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 16 — (B11) No. 7:
(B55) No. 18 — (B12) No. 5:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 — Chassis ground:
(B55) No. 18 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and chassis ground.
CHECK TCM POWER SUPPLY OUTPUT.
1) Connect the connector to TCM. (Transmission connector is disconnected)
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (
−
):
CHECK TURBINE SPEED SENSOR INPUT
CIRCUIT OF TCM.
Measure the voltage between TCM connector terminals.
Connector & terminal
(B55) No. 18 (+) — (B54) No. 19 (
−
):
Is the voltage 10 — 13 V?
Is the voltage 4 — 6 V?
CHECK TCM I/O SIGNAL.
Check TCM I/O signal of power supply, ground and PVIGN power supply relay.
<Ref. to 5AT(diag)-12, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
CHECK HARNESS ASSEMBLY (TURBINE
SPEED SENSOR GROUND).
Check the installing condition of ground connecting harness (used for both of turbine speed sensor 1, rear vehicle speed sensor).
PREPARE SUBARU SELECT MONITOR.
PREPARE OSCILLOSCOPE.
Is TCM I/O signal OK?
Is the ground connecting harness installed to transmission body correctly, or the harness and connector terminals not damaged?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
When the poor installation of ground connecting harness, install it securely.
Replace the transmission assembly when the harness is damaged. <Ref. to 5AT-38, Automatic Transmission Assembly.>
Do you have a Subaru Select
Monitor?
Do you have an oscilloscope?
5AT(diag)-111
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
9
10
Step Check Yes No
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and drive the vehicle.
4) Read the current data of front wheel speed using Subaru Select Monitor.
<Ref. to 5AT(diag)-16, OPERATION, Subaru
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Does the value of the front wheel speed depending on the acceleration and deceleration of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair harness or contact in the ATF temperature sensor and transmission connector.
Replace the transmission harness.
CHECK INPUT SIGNAL FOR TCM USING
OSCILLOSCOPE.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Set the oscilloscope to TCM connector terminals.
Connector & terminal
Positive probe; (B55) No. 18:
Ground lead; (B54) No. 19:
4) Start the engine, and drive the vehicle.
5) Display the pulse signal of turbine speed sensor 1 to oscilloscope, and measure the frequency.
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Is the frequency of measured waveform (pulse wave) changed depending on the acceleration and deceleration of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair harness or contact in the ATF temperature sensor and transmission connector.
Replace the transmission harness.
5AT(diag)-112
11
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and drive the vehicle.
4) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 7 (+) — (B54) No. 19 (
−
):
5) Stop the vehicle, and shift the select lever to “P” range.
6) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 7 (+) — (B54) No. 19 (
−
):
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Check Yes No
Does the voltage change within the range of 2 — 3 V when vehicle is driving? Is the voltage less than 0.5 V or more than 4.5 V constantly when the vehicle is parked with “P” range?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair harness or contact in the ATF temperature sensor and transmission connector.
Replace the transmission harness.
5AT(diag)-113
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AI: DTC P1707 AT AWD SOLENOID VALVE CIRCUIT MALFUNCTION
DTC DETECTING CONDITION:
Output signal circuit of transfer solenoid is open or shorted.
TROUBLE SYMPTOM:
• Tight corner braking phenomenon is occurred.
• Drivability getting worse.
WIRING DIAGRAM:
TCM
A: B54
B: B55
B11
T4
E
T6
TRANSMISSION
A:
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
1 2 3 4
5 6 7
9 10 11 12
8
13 14 15 16
17 18 19 20
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02083
5AT(diag)-114
1
2
3
4
5
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B55) No. 23 — (B11) No. 8:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B55) No. 23 — Chassis ground:
Is the resistance more than 1
M
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
5) Drain the ATF.
6) Remove the oil pan, and disconnect the control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 8 — (T6) No. 11:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 11 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Is the resistance 3 — 9
Ω
?
AWD SOLENOID CURRENT.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 11 — Transmission ground:
CHECK POOR CONTACT.
Check that there are no poor contact in TCM connector, transmission connector and control valve body connector.
Is there any loosing terminal, entering foreign matter, damaging connector body?
CHECK AFTER REPAIR.
1) Perform the clear memory mode.
2) Drive for a while, read the DTC, and verify that there is no faulty.
Is DTC displayed?
Yes
Repair the poor contact.
No
Repair the open circuit in harness between TCM connector and transmission connector.
Repair the short circuit in harness between TCM connector and transmission connector.
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between control valve body connector and transmission ground.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Temporary poor contact or open circuit occurs.
Recheck that the harness connector has no faulty.
5AT(diag)-115
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AJ:DTC P1710 TORQUE CONVERTER TURBINE 2 SPEED SIGNAL CIRCUIT 2
MALFUNCTION
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
TROUBLE SYMPTOM:
• Excessive shift shock.
• Does not shift to 5th
WIRING DIAGRAM:
A: B54
TCM
B: B55
B11
T4
B12
T3
T5 T6
TURBINE SPEED SENSOR 2
TRANSMISSION
E
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
B12
1 2 3 4
5 6 7 8
T5
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T6
1 2
5 6 7 8
3 4
9 10 11 12
AT-02084
5AT(diag)-116
1
2
3
4
5
6
7
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B55) No. 22 — (B12) No. 6:
(B54) No. 16 — (B11) No. 7:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 22 — Chassis ground:
(B54) No. 16 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
Repair the short circuit in harness between TCM and transmission connector.
CHECK TCM POWER SUPPLY OUTPUT.
1) Connect the connector to TCM. (Transmission connector is disconnected)
2) Turn the ignition switch to ON. (engine
OFF)
3) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — (B54) No. 19 (
−
):
CHECK TURBINE SPEED SENSOR INPUT
CIRCUIT OF TCM.
Measure the voltage between TCM connector terminals.
Connector & terminal
(B55) No. 22 (+) — (B54) No. 19 (
−
):
Is the voltage 10 — 13 V?
Is the voltage 4 — 6 V?
CHECK TCM I/O SIGNAL.
Check TCM I/O signal of power supply, ground and PVIGN power supply relay.
<Ref. to 5AT(diag)-12, ELECTRICAL SPECIFI-
CATION, Transmission Control Module (TCM)
PREPARE SUBARU SELECT MONITOR.
PREPARE OSCILLOSCOPE.
Is I/O signal OK?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
Do you have a Subaru Select
Monitor?
Do you have an oscilloscope?
5AT(diag)-117
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
8
9
Step Check Yes No
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and set the vehicle in 1st speed driving condition of manual mode.
4) Read the current data of torque converter turbine speed 2 using the Subaru Select Monitor.
<Ref. to 5AT(diag)-16, OPERATION, Subaru
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
Does the value of the turbine speed sensor 2 change depending on the acceleration, deceleration and shifting gear of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact in harness of turbine speed sensor 2 and transmission connector.
CHECK INPUT SIGNAL FOR TCM USING
OSCILLOSCOPE.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Set the oscilloscope to TCM connector terminals.
Connector & terminal
Positive probe; (B55) No. 22:
Ground lead; (B54) No. 19:
4) Start the engine, and set the vehicle in 1st speed driving condition of manual mode.
5) Display the pulse signal of turbine speed sensor 1 to oscilloscope, and measure the frequency.
Is the frequency of measured waveform (pulse wave) changed depending on the acceleration and deceleration of the vehicle?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact in harness of turbine speed sensor 2 and transmission connector.
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
5AT(diag)-118
10
11
12
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK INPUT SIGNAL FOR TCM USING
CIRCUIT TESTER.
1) Connect all the connectors.
2) Lift-up the vehicle and support with rigid racks.
NOTE:
Raise all wheels off floor.
3) Start the engine, and set the vehicle in 1st speed driving condition of manual mode.
4) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 22 (+) — (B54) No. 19 (
−
):
5) Stop the vehicle, and shift the select lever to “P” range.
6) Measure the voltage between TCM terminals.
Connector & terminal
(B55) No. 22 (+) — (B54) No. 19 (
−
):
Check Yes No
Does the voltage change within the range of 2 — 3 V when vehicle is driving? Is the voltage less than 0.5 V or more than 4.5 V constantly when the vehicle is parked with “P” range?
Even if the SPORT indicator lights blinks, the system is in normal condition.
A temporary poor contact of connector or harness may be the cause.
Repair the poor contact in harness of turbine speed sensor 2 and transmission connector.
NOTE:
The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. <Ref. to ABS(diag)-27, Clear Memory
Mode.>
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance less than 1
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T3) No. 6 — (T6) No. 3:
(T4) No. 7 — (T5) No. 15:
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T6) No. 3 — Transmission ground:
(T5) No. 15 — Transmission ground:
Is the resistance more than 1
M
Ω
?
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the short circuit in harness between transmission connector and transmission ground.
5AT(diag)-119
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AK:DTC P1716 ATF TEMP. SENSOR 2 CIRCUIT LOW
DTC DETECTING CONDITION:
Input signal circuit of TCM to ATF temperature sensor 2 is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
B54 TCM
B11
T4
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2
5 6 7 8
3 4
9 10 11 12
T6
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T5
TRANSMISSION
T6
AT-01628
5AT(diag)-120
1
2
3
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM and transmission connector.
Connector & terminal
(B54) No. 13 — (B11) No. 12:
(B54) No. 11 — (B11) No. 6:
Is the resistance less than 1
Ω
?
Yes
No
Repair the open circuit in harness between TCM and transmission connector.
CHECK ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connectors to transmission and TCM.
3) Turn the ignition switch to ON and start engine.
4) Warm-up the transmission until the ATF temperature reaches to 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Is the resistance 300 — 700
Ω
?
5) Disconnect the connector from transmission.
6) Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 6 — (T4) No. 12:
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 6 — (T4) No. 12:
3) Measure the voltage between TCM connector terminals.
Connector & terminal
(B54) No. 11 (+) — (B54) No. 13 (
−
):
Does the resistance value increase while the ATF temperature decreases?
PREPARE SUBARU SELECT MONITOR.
CHECK INPUT SIGNAL FOR TCM.
1) Connect the connector to transmission.
2) Warm-up the transmission until the ATF temperature is approx. 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Do you have a Subaru Select
Monitor?
Is the voltage 0.4 — 0.9 V?
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair harness or contact in the ATF temperature sensor and transmission connector.
5AT(diag)-121
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6
7
8
Step
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Read the ATF temperature using Subaru
Select Monitor.
Check
Does the ATF temperature gradually decrease?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance less than 1
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission connector and control valve body connector.
Connector & terminal
(T4) No. 12 — (T5) No. 1:
(T4) No. 6 — (T6) No. 2:
CHECK POOR CONTACT.
Check poor contact of ATF temperature sensor
1 circuit.
Is there poor contact?
Yes No
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair harness or contact in the ATF temperature sensor and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the open circuit in harness between control valve body connector and transmission connector.
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-122
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AL:DTC P1717 ATF TEMP. SENSOR 2 CIRCUIT HIGH
DTC DETECTING CONDITION:
Input signal circuit of TCM to ATF temperature sensor 2 is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
B54 TCM
B11
T4
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B11
5
1 2
6 7
3 4
8
9 10 11 12
13 14 15 16
17 18 19 20
T5
1 2
5 6 7 8
3 4
9 10 11 12
T6
1 2 3
7
4 5
8 9 10 11 12 13 14
6
15 16
T5
TRANSMISSION
T6
AT-01628
5AT(diag)-123
4
5
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
Step Check
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and transmission.
3) Measure the resistance of harness between TCM connector and chassis ground.
Connector & terminal
(B54) No. 13 — (B11) No. 12:
(B54) No. 11 — (B11) No. 6:
Is the resistance more than 1
M
Ω
?
Yes
No
Repair the short circuit in harness between TCM and transmission connector.
CHECK ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connectors to transmission and TCM.
3) Turn the ignition switch to ON and start engine.
4) Warm-up the transmission until the ATF temperature reaches to 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Is the resistance 300 — 700
Ω
?
5) Disconnect the connector from transmission.
6) Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 6 — (T4) No. 12:
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission connector terminals.
Connector & terminal
(T4) No. 6 — (T4) No. 12:
3) Measure the voltage between TCM connector terminals.
Connector & terminal
(B54) No. 11 (+) — (B54) No. 13 (
−
):
Does the resistance value increase while the ATF temperature decreases?
PREPARE SUBARU SELECT MONITOR.
CHECK INPUT SIGNAL FOR TCM.
1) Connect the connector to transmission.
2) Warm-up the transmission until the ATF temperature is approx. 80
°
C (176
°
F).
NOTE:
If the ambient temperature is below 0
°
C (32
°
F), drive the vehicle until the ATF reaches its operating temperature.
Do you have a Subaru Select
Monitor?
Is the voltage 0.4 — 0.9 V?
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair harness or contact in the ATF temperature sensor and transmission connector.
5AT(diag)-124
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
6
7
8
Step
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Read the ATF temperature using Subaru
Select Monitor.
Check
Does the ATF temperature gradually decrease?
CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmission.
3) Remove the transmission connector from bracket.
4) Lift-up the vehicle and place it on rigid racks.
Is the resistance more than 1
M
Ω
?
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the connector from control valve body connector.
7) Measure the resistance between transmission ground and control valve body connector.
Connector & terminal
(T5) No. 1 — Chassis ground:
(T6) No. 2 — Chassis ground:
CHECK POOR CONTACT.
Check poor contact of ATF temperature sensor
1 circuit.
Is there poor contact?
Yes No
Even if the SPORT indicator lights blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair harness or contact in the ATF temperature sensor and transmission connector.
Replace the control valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Repair the short circuit in harness between control valve body connector and transmission connector.
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
AM:DTC P1718 AT CAN COMMUNICATION CIRCUIT
NOTE:
For DTC P1718 AT CAN Communication circuit, Refer to “LAN System”. <Ref. to LAN(diag)-14, READ DI-
AGNOSTIC TROUBLE CODE (DTC), OPERATION, Subaru Select Monitor.>
5AT(diag)-125
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AN:DTC P1760 LATERAL ACCELERATION SENSOR PERFORMANCE PROB-
LEM
DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:
A: B54
B: B55
TCM
A: B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B: B55
1 2 3 4
10 11 12
19 20 21
13
5 6
14 15
7 8 9
16 17 18
22 23 24
B359
1 2 3
B359
G SENSOR
AT-01634
5AT(diag)-126
4
5
6
7
1
2
3
8
9
10
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Read the Subaru Select Monitor display.
Check
Is the value on the monitor display 2.3 — 2.7 V when the vehicle is on a level?
Yes
No
CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Remove the lateral G sensor from vehicle.
(Do not disconnect connector.)
4) Turn the ignition switch to ON.
5) Select {Current Data Display & Save} in
Subaru Select Monitor.
6) Read the Subaru Select Monitor display.
CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
Read the Subaru Select Monitor display.
CHECK LATERAL G SENSOR.
1) Remove the console box.
2) Remove the lateral G sensor from vehicle.
3) Connect the connector to lateral G sensor.
4) Connect the connector to ABSCM&H/U.
5) Turn the ignition switch to ON.
6) Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the value on the monitor display 3.3 — 4.3 V when lateral
G sensor is inclined to the right to 90
°
?
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the value on the monitor display 0.7 — 1.7 V when lateral
G sensor is inclined to the left to 90
°
?
Is there poor contact in connector between TCM and the lateral G sensor?
Repair the connector.
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM connector terminals.
Connector & terminal
(B54) No. 13 — (B55) No. 6:
Is the resistance 5.0 — 6.0 k
Ω
?
Repair the harness connector between lateral G sensor and TCM.
Is the voltage 2.3 — 2.7 V when the lateral G sensor is horizontal?
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 3.3 — 4.3 V when lateral G sensor is inclined to the right to 90
°
?
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 0.7 — 1.7 V when lateral G sensor is inclined to the left to 90
°
?
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
5AT(diag)-127
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
11
12
Step
CHECK ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Erase the memory.
4) Perform the inspection mode.
5) Read the DTC.
CHECK OTHER DTC DETECTION.
Check Yes No
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
5AT(diag)-128
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AO:DTC P1761 LATERAL ACCELERATION SENSOR CIRCUIT LOW
DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:
A: B54
B: B55
TCM
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B: B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B359
1 2 3
B359
G SENSOR
1
2
Step
CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Read the lateral G sensor output on the
Subaru Select Monitor display.
CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
position?
Check
Is the value on the monitor display 2.3 — 2.7 V when the lateral G sensor is in horizontal
Is there poor contact in connector between TCM and the lateral G sensor?
Yes
Repair the connector.
No
AT-01634
5AT(diag)-129
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
3
4
5
6
7
8
9
10
11
Step
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Check Yes
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM connector terminals.
Connector & terminal
(B54) No. 13 — (B55) No. 6:
Is the resistance 5.0 — 6.0 k
Ω
?
Repair the harness connector between lateral G sensor and TCM.
CHECK GROUND SHORT OF HARNESS.
Measure the resistance between TCM connector and chassis ground.
Connector & terminal
(B54) No. 13 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Repair the harness between lateral G sensor and
TCM.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK LATERAL G SENSOR.
1) Remove the console box.
2) Remove the lateral G sensor from vehicle.
3) Connect the connector to lateral G sensor.
4) Connect the connector to the TCM.
5) Turn the ignition switch to ON.
6) Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 2.3 — 2.7 V when the lateral G sensor is horizontal?
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 3.3 — 4.3 V when lateral G sensor is inclined to the right to 90
°
?
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 0.7 — 1.7 V when lateral G sensor is inclined to the left to 90
°
?
CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Erase the memory.
4) Perform the inspection mode.
5) Read the DTC.
CHECK OTHER DTC DETECTION.
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
5AT(diag)-130
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AP:DTC P1762 LATERAL ACCELERATION SENSOR CIRCUIT HIGH
DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:
A: B54
B: B55
TCM
A: B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
B: B55
1 2 3 4
10 11 12 13
19 20 21
5 6
14 15
7 8 9
16 17 18
22 23 24
B359
1 2 3
B359
G SENSOR
AT-01634
5AT(diag)-131
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
7
8
9
10
11
Step
CHECK OUTPUT OF LATERAL G SENSOR
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Read the lateral G sensor output on the
Subaru Select Monitor display.
Is the value on the monitor display 2.3 — 2.7 V when the lateral G sensor is in horizontal position?
Check
CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in connector between TCM and the lateral G sensor?
Yes
Repair the connector.
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
CHECK OTHER DTC DETECTION.
CHECK CONDITIONAL INFORMATION
WHEN FAULTY.
Read the lateral G sensor output on the Subaru Select Monitor display.
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
No
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
Is the reading indicated on monitor display 4.65 V or more?
Repair the harness connector between lateral G sensor and
ABSCM&H/U.
CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM connector terminals.
Connector & terminal
(B55) No. 5 — No. 1:
Is the resistance 4.3 — 4.9 k
Ω
?
Is the voltage less than 1 V?
CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Disconnect the connector from lateral G sensor.
4) Disconnect the connector from TCM.
5) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 6 (+) — Chassis ground (
−
):
CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between TCM connector and chassis ground.
Connector & terminal
(B55) No. 6 (+) — Chassis ground (
−
):
Is the voltage less than 1 V?
CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in connector between TCM and the lateral G sensor?
Repair the connector.
Repair the harness between lateral G sensor and
TCM.
Repair the harness between lateral G sensor and
TCM.
CHECK TCM.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
CHECK OTHER DTC DETECTION.
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
5AT(diag)-132
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
12
13
14
15
16
17
18
19
Step
CHECK INPUT VOLTAGE OF LATERAL G
SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Remove the lateral G sensor from vehicle.
(Do not disconnect connector.)
4) Turn the ignition switch to ON.
5) Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 1 (+) — No. 2 (
−
):
Check Yes
Is the voltage 4.75 — 5.25 V?
CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM connector terminals.
Connector & terminal
(B55) No. 5 — No. 6:
Is the resistance 5.0 — 5.6 k
Ω
?
CHECK LATERAL G SENSOR.
1) Connect the connector to lateral G sensor.
2) Connect the connector to the TCM.
3) Turn the ignition switch to ON.
4) Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 2.1 — 2.5 V when the lateral G sensor is horizontal?
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 3.3 — 3.7 V when lateral G sensor is inclined to the right to 90
°
?
No
Repair the harness connector between lateral G sensor and TCM.
Repair the harness connector between lateral G sensor and TCM.
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor connector terminals.
Connector & terminal
(B359) No. 3 (+) — No. 2 (
−
):
Is the voltage 0.5 — 0.9 V when lateral G sensor is inclined to the left to 90
°
?
CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
Is there poor contact in connector between TCM and the lateral G sensor?
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
CHECK OTHER DTC DETECTION.
Repair the connector.
Replace the lateral G sensor.
<Ref. to 5AT-63,
Lateral G Sensor.>
Is the same DTC displayed?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is any other DTC displayed?
Perform the diagnosis according to
DTC.
Temporary poor contact occurs.
AQ:DTC P1798 GEAR 1 ENGINE BRAKE
NOTE:
Refer to DTC P0773 for diagnostic procedure. <Ref. to 5AT(diag)-94, DTC P0773 SHIFT SOLENOID “E”
ELECTRICAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-133
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AR:DTC P1799 INTERLOCK
DTC DETECTING CONDITION:
Perform the interlock judgment when the oil pressure switch pattern detect the specified interlock patterns for more than 2 seconds other than shifting.
TROUBLE SYMPTOM:
Locked to 2nd, 4th or 5th gear.
1
2
3
Step
CHECK DTC OF TCM.
CHECK DTC OF TCM.
CHECK POOR CONTACT.
Is DTC of oil pressure switch detected?
Check
Is the DTC related to solenoid function or solenoid circuit detected?
Is there any open or poor contact of connector (loosing terminal, entering foreign matter, damaging connector body)?
Yes
Perform the diagnosis according to
DTC.
No
Perform the diagnosis according to
DTC.
Repair the poor contact.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
5AT(diag)-134
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AS:DTC P1817 SPORTS MODE SWITCH CIRCUIT (MANUAL SWITCH)
DTC DETECTING CONDITION:
Input signal circuit of SPORT shift switch is open or shorted.
TROUBLE SYMPTOM:
• Can not set to manual mode.
• “SPORT” light illuminates when shifting to “N”
→
“D” range.
WIRING DIAGRAM:
E
SBF-1 SBF-7
IGNITION
SWITCH
SPORT
COMBINATION
METER i10
JOINT
CONNECTOR i77
A: i84
C: B281
B: B280
BODY INTEGRATED UNIT i10
1 2 3 4 5
11 12 13 14 15 16
6 7 8 9 10
17 18 19 20 21 22
i77
1 2 3 4 5 6 7 8 9 10 11 12
A: i84
1 2 3 4 5 6 7 8
9 10
24 25
11 12 13 14 15
26 27 28 29
16 17 18 19 20 21 22 23
30 31 32 33 34 35
B: B280
1
8
2
9
3
21 22 23 24 25
4 5 6 7
10 11 12 13 14 15 16 17 18 19 20
26 27 28 29 30
B54
1 2 3 4
10 11 12
19 20 21
5 6 7 8 9
13 14 15 16 17 18
22 23 24
B116
1
5
2
6 7 8
3 4
9 10
C: B281
1
8
2
9
20 21
3 4
24 25 26
5 6 7
10 11 12 13 14 15 16 17 18 19
22 23 27 28
SPORT
SHIFT MODE
SWITCH
SELECT
LEVER
B116
E
B54 TCM
AT-01539
5AT(diag)-135
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
7
8
Step Check
CHECK BODY INTEGRATED UNIT.
1) Connect the Subaru Select Monitor to data link connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Read the DTC of body integrated unit using
Subaru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
Is DTC displayed?
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever to “P” range.
2) Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. <Ref. to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
Is OFF displayed?
Yes
Perform the diagnosis according to
DTC.
No
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever from “P” to “D” range.
2) Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. <Ref. to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
Is the indication on each range
OFF?
CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever to manual mode.
2) Shift the select lever to other than “D” range.
3) Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. <Ref. to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
Is OFF displayed?
CHECK DTC OF TCM.
Replace the select lever assembly.
<Ref. to CS-7,
Select Lever.>
Replace the select lever assembly.
<Ref. to CS-7,
Select Lever.>
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input) and AT CAN communication circuit displayed?
Perform the diagnosis according to each DTC.
CHECK TCM INPUT SIGNAL.
1) Shift the select lever from “P” to “D” range.
2) Read the TIP mode SW data of TCM using
Subaru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
Is the indication on each range
OFF?
Even if the SPORT indicator lights blinks, the circuit is in normal condition. A temporary poor contact of connector or harness may be the cause.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND SPORT SHIFT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect harness connector from body integrated unit and select lever.
3) Measure the harness resistance between the body integrated unit and chassis ground.
Connector & terminal
(B281) No. 26 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Repair the short circuit of harness between the body integrated unit and
SPORT shift switch.
CHECK SPORT SHIFT SWITCH.
1) Shift the select lever to “P” range.
2) Measure the resistance between harness connector terminals of SPORT shift switch.
Terminals
(B116) No. 7 — No. 8:
Is the resistance more than 1
M
Ω
?
Check the body integrated unit.
Replace the select lever assembly.
<Ref. to CS-7,
Select Lever.>
5AT(diag)-136
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
AT:DTC P1840 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH A CIR-
CUIT
DTC DETECTING CONDITION:
Front brake oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0751 for diagnostic procedure. <Ref. to 5AT(diag)-65, DTC P0751 SHIFT SOLENOID “A”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AU:DTC P1841 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH B CIR-
CUIT
DTC DETECTING CONDITION:
Low coast brake oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock
NOTE:
Refer to DTC P0771 for diagnostic procedure. <Ref. to 5AT(diag)-91, DTC P0771 SHIFT SOLENOID “E”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AV:DTC P1842 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH C CIR-
CUIT
DTC DETECTING CONDITION:
Input clutch oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock.
NOTE:
Refer to DTC P0756 for diagnostic procedure. <Ref. to 5AT(diag)-72, DTC P0756 SHIFT SOLENOID “B”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AW:DTC P1843 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH D CIR-
CUIT
DTC DETECTING CONDITION:
Direct clutch oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock.
NOTE:
Refer to DTC P0766 for diagnostic procedure. <Ref. to 5AT(diag)-85, DTC P0766 SHIFT SOLENOID “D”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
AX:DTC P1844 TRANSMISSION FLUID PRESSURE SENSOR/SWITCH E CIR-
CUIT
DTC DETECTING CONDITION:
High & low reverse clutch oil pressure switch malfunction.
TROUBLE SYMPTOM:
Excessive shift shock.
NOTE:
Refer to DTC P0761 for diagnostic procedure. <Ref. to 5AT(diag)-78, DTC P0761 SHIFT SOLENOID “C”
PERFORMANCE OR STUCK OFF, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5AT(diag)-137
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
15.Diagnostic Procedure without Diagnostic Trouble Code (DTC)
A: CHECK SPORT SHIFT SWITCH
DIAGNOSIS:
Input signal circuit of SPORT shift switch is open or shorted.
TROUBLE SYMPTOM:
Does not shift on manual mode.
WIRING DIAGRAM:
A: B280
B: B281
BODY INTEGRATED UNIT
TB
TB
AT SELECT
LEVER
B116
B68
ROLL CONNECTOR
E
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21
22
23 24
ST3
1 2 3
6 7 8
4 5
9 10
TCM
B54
ST3
E
A: B280
1
8
21
2 3 4 5 6 7
9 10 11 12 13 14 15
22 23 24 25
16 17 18
26 27
19 20
28 29 30
B68
1 2 3
4 5 6 7 8
LH RH
STEERING SHIFT SWITCH
B: B281
1 2 3 4 5 6 7
8 9
20 21
10 11 12 13 14 15
22 23 24 25
16 17 18 19
26 27 28
B116
1 2 3 4
5 6 7 8 9 10
AT-01545
5AT(diag)-138
2
3
6
7
1
4
5
8
9
10
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check Yes
CHECK BODY INTEGRATED UNIT.
1) Perform the ON/OFF operation on SPORT shift switch.
2) Read the data of SPORT shift switch signal using Subaru Select Monitor.
Both ON/OFF can be detected normally?
No
CHECK DTC OF BODY INTEGRATED UNIT. Is DTC of CAN detected?
Perform the diagnosis according to
DTC.
CHECK TCM.
1) Perform the ON/OFF operation on SPORT shift switch.
2) Read the data of SPORT shift switch signal using Subaru Select Monitor.
Both ON/OFF can be detected normally?
CHECK TIP INDICATOR ON COMBINATION
METER.
Is the TIP indicator OK?
CHECK DTC OF TCM.
CHECK DTC OF METER.
CHECK SPORT SHIFT SWITCH GROUND
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from SPORT shift switch.
3) Measure the resistance of harness between SPORT shift switch connector and chassis ground.
Connector & terminal
(B116) No. 6 — Chassis ground:
Is DTC of CAN detected?
Is DTC of CAN detected?
Is the resistance less than 1
Ω
?
Replace the combination meter assembly. <Ref. to
IDI-16, Combination Meter Assembly.>
Perform the diagnosis according to
DTC.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the meter.
Perform the diagnosis according to
DTC.
Repair the open circuit in harness between SPORT shift switch and chassis ground.
CHECK SPORT SHIFT SWITCH.
Measure the resistance between the SPORT shift switch terminals.
Connector & terminal
(B116) No. 6 — No. 5:
CHECK SPORT SHIFT SWITCH.
1) Shift the select lever to manual mode.
2) Measure the resistance between the
SPORT shift switch terminals.
Connector & terminal
(B116) No. 6 — No. 5:
Is the resistance more than 1
M
Ω
Is the resistance less than 1
Ω
?
?
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
1) Disconnect the connector from body integrated unit.
2) Measure the resistance of harness between the body integrated unit and SPORT shift switch connector.
Connector & terminal
(B116) No. 5 — (B281) No. 15:
Is the resistance less than 1
Ω
?
Replace the guide plate assembly.
Replace the guide plate assembly.
Repair the open circuit in harness between SPORT shift switch connector and TCM connector, or poor contact in coupling connector.
5AT(diag)-139
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
11
12
13
14
15
16
17
Step Check
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
1) Disconnect the connector from body integrated unit.
2) Measure the resistance of harness between SPORT shift switch connector and chassis ground.
Connector & terminal
(B116) No. 5 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
Is the voltage more than 9 V?
CHECK INPUT SIGNAL FOR TCM.
1) Connect all the connectors.
2) Turn the ignition switch to ON (engine
OFF).
3) Measure the signal voltage for TCM.
Connector & terminal
(B281) No. 15 (+) — Chassis ground (
−
):
Is the voltage less than 1 V?
CHECK INPUT SIGNAL FOR TCM.
1) Shift and hold the select lever to up side.
2) Measure the signal voltage for TCM.
Connector & terminal
(B281) No. 15 (+) — Chassis ground (
−
):
CHECK SPORT SHIFT SWITCH GROUND
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from SPORT shift switch.
3) Measure the resistance of harness between SPORT shift switch connector and chassis ground.
Connector & terminal
(B116) No. 10 — Chassis ground:
CHECK SPORT SHIFT SWITCH.
Measure the resistance between the SPORT shift switch terminals.
Connector & terminal
(B116) No. 10 — No. 9:
Is the resistance less than 1
Ω
?
Is the resistance more than 1
M
Ω
?
CHECK SPORT SHIFT SWITCH.
1) Shift the select lever to manual mode.
2) Measure the resistance between the
SPORT shift switch terminals.
Connector & terminal
(B116) No. 10 — No. 9:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
1) Disconnect the connector from body integrated unit.
2) Measure the resistance of harness between the body integrated unit and SPORT shift switch connector.
Connector & terminal
(B116) No. 9 — (B281) No. 25:
Is the resistance less than 1
Ω
?
No
Repair the short circuit in harness between SPORT shift switch connector and TCM connector.
Replace the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
Replace the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
Repair the open circuit in harness between SPORT shift switch and chassis ground.
Replace the guide plate assembly.
Replace the guide plate assembly.
Repair the open circuit in harness between SPORT shift switch connector and body integrated unit connector, or poor contact in coupling connector.
5AT(diag)-140
18
19
20
21
22
23
24
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step Check
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND SPORT
SHIFT SWITCH.
1) Disconnect the steering roll connector.
2) Measure the resistance of harness between SPORT shift switch connector and chassis ground.
Connector & terminal
(B116) No. 9 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Yes
CHECK THE INPUT SIGNAL TO BODY INTE-
GRATED UNIT.
1) Connect all the connectors.
2) Turn the ignition switch to ON (engine
OFF).
3) Check the signal voltage for body integrated unit.
Connector & terminal
(B281) No. 25 (+) — Chassis ground (
−
):
Is the voltage more than 9 V?
CHECK THE INPUT SIGNAL TO BODY INTE-
GRATED UNIT.
1) Shift and hold the select lever to up side.
2) Check the signal voltage for body integrated unit.
Connector & terminal
(B281) No. 25 (+) — Chassis ground (
−
):
Is the voltage less than 1 V?
CHECK STEERING SHIFT SWITCH
GROUND CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from steering roll connector.
3) Measure the resistance of harness between steering roll connector and chassis ground.
Connector & terminal
(ST3) No. 3 — Chassis ground:
Is the resistance less than 1
Ω
?
CHECK STEERING SHIFT SWITCH.
Measure the resistance between steering roll connector terminals.
Connector & terminal
(ST3) No. 1 — No. 3:
Is the resistance more than 1
M
Ω
?
CHECK STEERING SHIFT SWITCH.
1) Press and hold the steering shift switch to + side.
2) Measure the resistance between the steering shift switch terminals.
Connector & terminal
(ST3) No. 1 — No. 3:
Is the resistance less than 1
Ω
?
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STEERING
ROLL CONNECTOR.
1) Disconnect the connector from body integrated unit.
2) Measure the resistance of harness between the body integrated unit connector and steering roll connector.
Connector & terminal
(B281) No. 15 — (B68) No. 2:
Is the resistance less than 1
Ω
?
No
Repair the short circuit of harness between the
SPORT shift switch connector and body integrated unit connector.
Replace the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
Replace the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
Repair the open circuit in harness between steering roll connector and chassis ground.
Replace the steering roll connector or steering shift switch. Or repair the poor contact in connector.
Replace the steering roll connector or steering shift switch. Or repair the poor contact in connector.
Repair the open circuit in harness between body integrated unit connector and steering roll connector, or poor contact in connector.
5AT(diag)-141
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
25
26
Step Check
CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND STEERING
ROLL CONNECTOR.
1) Disconnect the connector from body integrated unit.
2) Measure the resistance of harness between the body integrated unit connector and steering roll connector.
Connector & terminal
(B281) No. 25 — (B68) No. 6:
Is the resistance less than 1
Ω
?
CHECK POOR CONTACT.
Yes
Is there poor contact in SPORT shift switch circuit?
Repair the poor contact.
No
Repair the open circuit in harness between body integrated unit connector and steering roll connector, or poor contact in connector.
A temporary poor contact of SPORT shift switch connector or harness
5AT(diag)-142
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
B: CHECK SPORT SHIFT INDICATOR LIGHT
DIAGNOSIS:
Output signal circuit of SPORT shift indicator light is open or shorted.
TROUBLE SYMPTOM:
• SPORT shift indicator light does not illuminate or remains illuminated.
• SPORT shift indicator light display does not change.
WIRING DIAGRAM:
E
SPORT SHIFT
INDICATOR
COMBINATION
METER i10
JOINT
CONNECTOR i77
BODY INTEGRATED
UNIT
A: i84
B: B280 i10
1 2 3 4 5
11 12 13 14 15 16
6 7 8 9 10
17 18 19 20 21 22
i77
1 2 3 4 5 6 7 8 9 10 11 12
A: i84
1
9
2
24 25
3 4
26 27 28 29
5 6
30 31 32 33
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
34 35
B: B280
1 2 3 4 5 6 7
8 9 10 11 12 13
21 22 23 24 25
14 15
26
16 17 18 19 20
27 28 29 30
B54
1 2 3 4 5 6 7 8 9
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
B54 TCM
AT-01626
5AT(diag)-143
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
6
Step
CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
Check Yes
Is DTC of AT CAN communication circuit displayed?
Perform the diagnosis according to
DTC.
No
CHECK TCM.
Check DTC of TCM.
CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor switch to
ON.
5) Shift the select lever to manual mode side, and then shift down the select lever.
6) Read the indicator.
Is DTC of AT CAN communication circuit displayed?
Perform the diagnosis according to
DTC.
Is gear position 1 and “
▲
” displayed?
CHECK TCM.
1) Shift up the select lever.
2) Read the indicator.
Is gear position 2 and “
▼
” displayed?
CHECK BODY INTEGRATED UNIT.
Read the data of gear position using Subaru
Select Monitor.
Is SPORT shift gear position
2?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Refer to “General
Diagnostic Table”.
147, General Diagnostic Table.>
Check the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
CHECK COMBINATION METER.
Is the SPORT shift indicator
OK?
Refer to “General
Diagnostic Table”.
147, General Diagnostic Table.>
Replace the combination meter assembly. <Ref. to
IDI-16, Combination Meter Assembly.>
5AT(diag)-144
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
C: CHECK BUZZER
DIAGNOSIS:
Output signal circuit of buzzer is open or shorted.
TROUBLE SYMPTOM:
Buzzer remains beeping.
WIRING DIAGRAM:
E
SBF-1 SBF-7
IGNITION
SWITCH
A: i84
B: B280
JOINT
SPORT
SHIFT
BUZZER
COMBINATION
METER i10
CONNECTOR i77
BODY INTEGRATED UNIT i10
1 2 3 4 5
11 12 13 14 15 16
6 7 8 9 10
17 18 19 20 21 22
i77
1 2 3 4 5 6 7 8 9 10 11 12
A: i84
1
9
2
24 25
3 4
26 27 28 29
5 6
30 31 32 33
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
34 35
B: B280
1
8
2
9
3
21 22 23 24 25
4 5 6 7
10 11 12 13 14 15 16 17 18 19 20
26 27 28 29 30
B54
1 2 3 4
10 11 12 13
5 6
14 15
7
16
8
17
9
18
19 20 21 22 23
24
B54 TCM
AT-01627
5AT(diag)-145
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1
2
3
4
5
Step
CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
Check Yes
Is DTC of CAN communication displayed?
Perform the diagnosis according to
DTC.
No
CHECK TCM.
Check DTC of TCM.
CHECK BUZZER STOP.
Disconnect the connector (B54).
CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor switch to
ON.
5) Read the data of SPORT shift buzzer using
Subaru Select Monitor.
CHECK COMBINATION METER.
Is DTC of CAN communication displayed?
Perform the diagnosis according to
DTC.
Does the buzzer stop?
Replace the TCM.
<Ref. to 5AT-61,
Transmission Control Module
(TCM).>
Is the SPORT shift buzzer display “ON”?
Is the buzzer OK?
Replace the body integrated unit.
<Ref. to SL-46,
Body Integrated
Unit.>
Replace the combination meter assembly. <Ref. to
IDI-16, Combination Meter Assembly.>
Refer to “General
Diagnostic Table”.
147, General Diagnostic Table.>
Replace the combination meter assembly. <Ref. to
IDI-16, Combination Meter Assembly.>
5AT(diag)-146
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
16.General Diagnostic Table
A: INSPECTION
Shifting vehicle speed is low on “D” range.
Shifting vehicle speed is high on “D” range.
Excessive shock. (“N”
→
Symptom
“D” range)
Excessive shift shock on 1st of “D” range
→
2nd of “D” range or
“1st of manual mode”
→
“2nd of manual mode”.
Excessive shift shock on 2nd of “D” range
→
3rd of “D” range or
“2nd of manual mode”
→
“3rd of manual mode”.
Excessive shift shock on 3rd of “D” range
→
4th of “D” range or
“3rd of manual mode”
→
“4th of manual mode”.
Problem parts
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• ATF temperature sensor
• CAN communication signal
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Brake switch signal
• Lateral G sensor
• ATF temperature sensor
• Engine idle speed
• Engine speed signal
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• ATF temperature sensor
• Oil pressure switch 1 and Front brake solenoid valve
• CAN communication signal
• Fluid level and condition
• TCM power supply
• PVIGN relay
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 4 and Direct clutch solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 3 and Input clutch solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
5AT(diag)-147
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
Excessive shift shock on 4th of “D” range
→
5th of “D” range or
“4th of manual mode”
→
“5th of manual mode”.
Excessive shock at kick down.
Excessive shock at shift up.
Excessive shock at lock up.
Excessive shock at engine brake.
Judder is occurred at lock up.
Noise at “R”, “N” and “D” range.
Hold at “D” range or 1st on manual mode.
Problem parts
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 1 and Front brake solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• CAN communication signal
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Engine speed signal
• CAN communication signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Engine speed signal
• CAN communication signal
• Turbine speed sensor
• Lock up solenoid valve
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Fluid level and condition
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• CAN communication signal
• Fluid level and condition
• Line pressure
• Low coast brake solenoid valve
• Fluid level and condition
• Engine speed signal
• Turbine speed sensor
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• Lock up solenoid valve
• ATF temperature sensor 1 and 2
• Fluid level and condition
• Engine speed signal
• ATF temperature sensor 1 and 2
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Direct clutch solenoid valve
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor
5AT(diag)-148
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS) of manual mode”
→
Symptom
Hold at “D” range or 2nd on manual mode.
Hold at “D” range or 3rd on manual mode.
Hold at “D” range or 4th on manual mode.
Hold at “D” range or 5th on manual mode.
Gear does not shift 1st of “D” range
“2nd of manual mode”.
Gear does not shift 2nd of “D” range
→
3rd of “D” range or “2nd of manual mode”
→
“3rd of manual mode”.
Gear does not shift 3rd of “D” range of manual mode”
→
→
→
2nd of “D” range or “1st
4th of “D” range or “3rd
“4th of manual mode”.
Problem parts
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Low coast brake solenoid valve
• Line pressure
• Up switch signal
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Line pressure
• Up switch signal
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 3 and Input clutch solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• Low coast brake solenoid valve
• Front brake solenoid valve
• Line pressure
• Up switch signal
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• TCM power supply
• PVIGN relay
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 1 and Front brake solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Up switch
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 3 and Input clutch solenoid valve
• Oil pressure switch 1 and Front brake solenoid valve
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor
5AT(diag)-149
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
Gear does not shift 4th of “D” range of manual mode”
→
→
5th of “D” range or “4th
“5th of manual mode”.
Gear does not shift down to 4th on “D” range or manual mode.
Gear does not shift down to 3rd on “D” range or manual mode.
Gear does not shift down to 2nd on “D” range or manual mode.
Gear does not shift down to 1st on “D” range or manual mode.
No lock-up occurs.
No shift shock occurred when shifting 1st of “D” range
→
2nd of
“D” range or “1st of manual mode”
→
“2nd of manual mode”. Or clutch slipping occurred.
Problem parts
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 1 and Front brake solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Turbine speed sensor
• ATF temperature sensor
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 1 and Front brake solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 3 and Input clutch solenoid valve
• Oil pressure switch 1 and Front brake solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• TCM power supply
• PVIGN relay
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 5 and High & low reverse clutch solenoid
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Line pressure
• Engine speed signal
• Turbine speed sensor
• Lock up solenoid valve
• CAN communication signal
• ATF temperature sensor 1 and 2
• Accelerator pedal position sensor
• Brake switch signal
• Range signal
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• CAN communication signal
5AT(diag)-150
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
No shift shock occurred when shifting 2nd of “D” range
→
3rd of
“D” range or “2nd of manual mode”
→
“3rd of manual mode”. Or clutch slipping occurred.
No shift shock occurred when shifting 3rd of “D” range
→
4th of
“D” range or “3rd of manual mode”
→
“4th of manual mode”. Or clutch slipping occurred.
No shift shock occurred when shifting 4th of “D” range
→
5th of
“D” range or “4th of manual mode”
→
“5th of manual mode”. Or clutch slipping occurred.
Engine skids when shifting 5th of “D” range or “5th of manual mode” occurred.
→
→
4th of “D” range
“4th of manual mode”. Or slipping
Engine skids when shifting 4th of “D” range or “4th of manual mode” occurred.
→
→
3rd of “D” range
“3rd of manual mode”. Or slipping
Engine skids when shifting 3rd of “D” range
→
2nd of “D” range or “3rd of manual mode”
→
“2nd of manual mode”. Or slipping occurred.
Engine skids when shifting 2nd of “D” range
→
1st of “D” range or “2nd of manual mode”
→
“1st of manual mode”. Or slipping occurred.
Engine brake does not function at 5th
Engine brake does not function at 4th
→
→
4th of manual mode.
3rd of manual mode.
Problem parts
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• Line pressure
• CAN communication signal
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 3 and Input clutch solenoid valve
• Oil pressure switch 1 and Front brake solenoid valve
• Line pressure
• CAN communication signal
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 1 and Front brake solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 1 and Front brake solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 3 and Input clutch solenoid valve
• Oil pressure switch 1 and Front brake solenoid valve
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and Vehicle speed sensor 2
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Manual mode switch
• Oil pressure switch 1
• Down switch signal
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Manual mode switch
• Oil pressure switch 1 and Oil pressure switch 3
• Down switch signal
5AT(diag)-151
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Engine skids when start driving (1st) the vehicle. Or slipping occurred.
Symptom
Engine brake does not function at 3rd
→
2nd of manual mode.
Engine brake does not function at 2nd
→
1st of manual mode.
Excessive acceleration failure on “D” range.
Excessive acceleration failure on “R” range.
Engine skids when driving at 2nd. Or slipping occurred.
Engine skids when driving at 3rd. Or slipping occurred.
Engine skids when driving at 4th. Or slipping occurred.
Problem parts
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Manual mode switch
• Oil pressure switch 5
• Low coast brake solenoid valve
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Manual mode switch
• Oil pressure switch 4
• Low coast brake solenoid valve
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Inhibitor switch
• Control cable adjustment
• Vehicle speed sensor 1, 2
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• CAN communication signal
• Inhibitor switch
• Control cable adjustment
• Vehicle speed sensor 1, 2
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Oil pressure switch 4 and Direct clutch solenoid valve
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Oil pressure switch 5 and High & low reverse clutch solenoid valve
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Oil pressure switch 3 and Input clutch solenoid valve
5AT(diag)-152
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
5Engine skids when driving 5th. Or slipping occurred.
Slip at lock up.
Maximum vehicle speed is low.
There is completely no creep.
Excessive large creep.
Vehicle cannot be parking condition on “P” range. Parking condition is not released though shifting to other ranges.
Vehicle can drive on “P” range.
Vehicle can drive on “N” range.
Vehicle cannot drive at any range.
Vehicle cannot drive on “D” range.
Vehicle cannot drive on “R” range.
Problem parts
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Oil pressure switch 1 and Front brake solenoid valve
• Fluid level and condition
• Line pressure
• Engine speed signal
• Turbine speed sensor
• Lock up solenoid valve
• CAN communication signal
• Fluid level and condition
• Line pressure
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Direct clutch solenoid valve
• Vehicle speed sensor 1 and 2
• Fluid level and condition
• Engine speed signal
• CAN communication signal
• Oil pressure switch 4 and Direct clutch solenoid valve
• Line pressure
• Engine speed signal
• CAN communication signal
• Oil pressure switch 4
• Inhibitor switch
• Control cable adjustment
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Line pressure
• Inhibitor switch
• Fluid level and condition
• Control cable adjustment
• Line pressure
• Fluid level and condition
• Line pressure
• Inhibitor switch
• Control cable adjustment
• Loosing or damaging of propeller shaft.
• Loosing or damaging of drive shaft.
• Fluid level and condition
• Line pressure
• Inhibitor switch
• Control cable adjustment
• Loosing or damaging of propeller shaft.
• Loosing or damaging of drive shaft.
• Fluid level and condition
• Line pressure
• Inhibitor switch
• Control cable adjustment
• Loosing or damaging of propeller shaft.
• Loosing or damaging of drive shaft.
5AT(diag)-153
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
Engine cannot start on “P” or “N” range
Engine start other than “P” or “N” range
Engine stalls.
Engine stalls when shifting to “N”
→
“D” and “R” range.
Problem parts
• Key switch and Starter
• Control cable adjustment
• Inhibitor switch
• CAN communication line
• TCM
• Key switch and Starter
• Control cable adjustment
• Inhibitor switch
• TCM
• Fluid level and condition
• Engine speed signal
• Turbine speed sensor
• Lock up solenoid valve
• Line pressure
• Fluid level and condition
• Engine speed signal
• Turbine speed sensor
• Lock up solenoid valve
• Line pressure
5AT(diag)-154
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Key Features
- Maintenance procedures
- Disassembling instructions
- Reassembling guidance
- Inspection steps
- Adjustment details
- Diagnostics for experienced mechanics
- Use of SUBARU genuine parts
Frequently Answers and Questions
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Table of contents
- 3 Basic Diagnostics Procedure
- 5 Check List for Interview
- 6 General Description
- 8 Electrical Component Location
- 13 Transmission Control Module (TCM) I/O Signal
- 17 Subaru Select Monitor
- 20 Read Diagnostic Trouble Code (DTC)
- 21 Inspection Mode
- 22 Clear Memory Mode
- 23 Learning Control
- 24 SPORT Indicator Light Display
- 27 Diagnostic Procedure for Select Monitor Communication
- 31 List of Diagnostic Trouble Code (DTC)
- 35 Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- 139 Diagnostic Procedure without Diagnostic Trouble Code (DTC)
- 148 General Diagnostic Table