engine SUBARU LEGACY 1996 Service Repair Manual

B2M0657
AX: DTC P0731
—GEAR 1 INCORRECT RATIO (ATGR1)—
B2M0658
AY: DTC P0732
—GEAR 2 INCORRECT RATIO (ATGR2)—
B2M0659
AZ: DTC P0733
—GEAR 3 INCORRECT RATIO (ATGR3)—
B2M0660
BA: DTC P0734
—GEAR 4 INCORRECT RATIO (ATGR4)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Shift point too high or too low; engine brake not effected
in“3”range; excessive shift shock; excessive tight corner
“braking”
296
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

10BA1Check any other DTC (besides DTC P0731,
P0732, P0733, P0734) on display.
10BA2Check throttle position sensor circuit. 3-2 [T7K0].>
10BA3Check vehicle speed sensor 1 circuit. 3-2 [T7L0].>
10BA4Check vehicle speed sensor 2 circuit. 3-2 [T7M0].>
10BA5Check engine speed input circuit.

CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.





297
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

10BA2CHECK THROTTLE POSITION SENSOR
CIRCUIT.
: Is there any trouble in throttle position sen-
sor circuit?
NOTE:
For the diagnostic procedure on throttle position sensor
circuit, refer to 3-2 [T7K0].
: Repair or replace throttle position sensor circuit.
: Go to step10BA3.
10BA3CHECK VEHICLE SPEED SENSOR 1 CIR-
CUIT.
: Is there any trouble in vehicle speed sensor
1 circuit?
NOTE:
For the diagnostic procedure on vehicle speed sensor 1
circuit, refer to 3-2 [T7L0].
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step10BA4.
10BA4CHECK VEHICLE SPEED SENSOR 2 CIR-
CUIT.
: Is there any trouble in vehicle speed sensor
2 circuit?
NOTE:
For the diagnostic procedure on vehicle speed sensor 2
circuit, refer to 3-2 [T7M0].
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step10BA5.
10BA5
CHECK ENGINE SPEED INPUT CIRCUIT.
: Is there any trouble in engine speed input
circuit?
NOTE:
For the diagnostic procedure on engine speed input signal
circuit, refer to 3-2 [T7H0].
: Repair or replace engine speed input circuit.
: Go to next.
: Is there poor contact in TCM connector?
: Repair poor contact in TCM connector.
: Go to next.
: Is there any mechanical trouble in automatic
transmission?
: Repair or replace automatic transmission.
: Replace TCM.
299
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

B2M0661
BB: DTC P0740
—TORQUE CONVERTER CLUTCH SYSTEM
MALFUNCTION (ATLU
—F)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

No lock-up (after engine warm-up)

No shift or excessive tight corner“braking”
10BB1Check any other DTC (besides DTC P0740) on
display.
10BB2Check duty solenoid B circuit. [T7B0].>
10BB3Check throttle position sensor circuit. 3-2 [T7K0].>
10BB4Check vehicle speed sensor 1 circuit. 3-2 [T7L0].>
10BB5Check vehicle speed sensor 2 circuit. 3-2 [T7M0].>
10BB6Check engine speed input circuit. [T7H0].>
10BB7Check inhibitor switch circuit. DTC P0705, 2-7 [T10AT0].>
10BB8Check brake light switch circuit. DTC P0703, 2-7 [T10AS0].>
10BB9Check ATF temperature sensor circuit. 3-2 [T7F0].>
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.









300
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

10BB2
CHECK DUTY SOLENOID B CIRCUIT.
: Is there any trouble in duty solenoid B cir-
cuit?
NOTE:
For the diagnostic procedure on duty solenoid B circuit,
refer to 3-2 [T7B0].
: Repair or replace duty solenoid B circuit.
: Go to step10BB3.
10BB3CHECK THROTTLE POSITION SENSOR
CIRCUIT.
: Is there any trouble in throttle position sen-
sor circuit?
NOTE:
For the diagnostic procedure on throttle position sensor
circuit, refer to 3-2 [T7K0].
: Repair or replace throttle position sensor circuit.
: Go to step10BB4.
10BB4CHECK VEHICLE SPEED SENSOR 1 CIR-
CUIT.
: Is there any trouble in vehicle speed sensor
1 circuit?
NOTE:
For the diagnostic procedure on vehicle speed sensor 1
circuit, refer to 3-2 [T7L0].
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step10BB5.
10BB5CHECK VEHICLE SPEED SENSOR 2 CIR-
CUIT.
: Is there any trouble in vehicle speed sensor
2 circuit?
NOTE:
For the diagnostic procedure on vehicle speed sensor 2
circuit, refer to 3-2 [T7M0].
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step10BB6.
10BB6
CHECK ENGINE SPEED INPUT CIRCUIT.
: Is there any trouble in engine speed input
circuit?
NOTE:
For the diagnostic procedure on engine speed input signal
circuit, refer to 3-2 [T7H0].
: Repair or replace engine speed input circuit.
: Go to step10BB7.
302
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

B2M0662
BC: DTC P0743
—TORQUE CONVERTER CLUTCH SYSTEM
(DUTY SOLENOID B) ELECTRICAL (ATLU)
—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

No lock-up (after engine warm-up)
10BC1Check DTC P0743 on display.
Check duty solenoid B circuit.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
OBD0413
10BC1
CHECK DTC P0743 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0743?
: Check duty solenoid B circuit.
NOTE:
For the diagnostic procedure on duty solenoid B circuit,
refer to 3-2 [T7B0].

304
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

B2M0666
BG: DTC P0760
—SHIFT SOLENOID C (SHIFT SOLENOID 3)
MALFUNCTION (ATOVR
—F)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Ineffective engine brake with selector lever in“3”
10BG1Check any other DTC (besides DTC P0760) on
display.
10BG2Check inhibitor switch circuit. DTC P0705, 2-7 [T10AT0].>
10BG3Check gear position.
10BG4Check shift solenoid 1 circuit. [T7E0].>
10BG5Check shift solenoid 2 circuit. [T7D0].>
10BG6Check shift solenoid 3 circuit. [T7C0].>
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.






308
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

OBD0145A
10BG3
CHECK GEAR POSITION.
1) Turn ignition switch to OFF.
2) Connect the Subaru select monitor to data link connec-
tor.
3) Lift-up or raise the vehicle and support with safety
stands.
CAUTION:
On AWD models, raise all wheels off ground.
4) Start and warm-up the engine and transmission.
H2M1150
5) Subaru select monitor switch to ON.
6) Select AT mode using function key.
Press the function key [/], and change to AT mode.
7) Press the function key [0].
G3M0152
8) Designate mode using function key.
Function mode for AT: F10
OBD0615
9) Move selector lever to“D”and drive the vehicle.
10) Read data on Subaru select monitor.
: Does gear position change according to
throttle position and vehicle speed?
: Go to next.
: Go to step10BG4.
: Is there poor contact in TCM connector?
: Repair poor contact in TCM connector.
: Go to next.
: Is there any mechanical trouble in automatic
transmission?
: Repair or replace automatic transmission.
: Replace TCM.
310
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

B2M0667
BH: DTC P0763
—SHIFT SOLENOID C (SHIFT SOLENOID 3)
ELECTRICAL (ATOVR)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Ineffective engine brake with selector lever in“3”
10BH1Check DTC P0763 on display.
Check shift solenoid 3 circuit.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
OBD0452
10BH1
CHECK DTC P0763 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0763?
: Check shift solenoid 3 circuit.
NOTE:
For the diagnostic procedure on shift solenoid 3 circuit,
refer to 3-2 [T7C0].

312
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

OBD0458
BI: DTC P1100
—STARTER SWITCH CIRCUIT
MALFUNCTION (ST
—SW)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Failure of engine to start
10BI1Check operation of starter motor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
B2M0516
313
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code