SUBARU LEGACY 1995 Service Repair Manual

1.Check harness connector between TCM and
duty solenoid B.
2.Check duty solenoid B’s ground line.
3.Check duty solenoid B.
4.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0413
NOTE:
For the diagnostic procedure on duty solenoid B circuit,
refer to“3-2 [T7B0]”.



295
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0422
AX: DTC P0748
—PRESSURE CONTROL SOLENOID (DUTY
SOLENOID A) ELECTRICAL (PL)—
OBD0048B
DESCRIPTION:

This solenoid is mounted to the control valve, and its
duty ratio is controlled by the signal sent from TCM. This
solenoid then controls the pressure modifier valve and
pressure regulator valve to adjust the line pressure to an
optimum pressure level suitable for operating conditions.

Regulates the line pressure according to driving condi-
tions.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Excessive shift shock
296
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1.Check harness connector between TCM and
duty solenoid A.
2.Check harness connector between TCM and
dropping resistor.
3.Check duty solenoid A’s ground line.
4.Check dropping resistor.
5.Check duty solenoid A.
6.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0424
NOTE:
For the diagnostic procedure on duty solenoid A circuit,
refer to“3-2 [T7A0]”.





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

OBD0434
AY: DTC P0753
—SHIFT SOLENOID A (SHIFT SOLENOID 1)
ELECTRICAL (SFT1)—
OBD0048C
DESCRIPTION:

These solenoids are mounted to the control valve. They
are turned ON or OFF according to signals sent from the
TCM. The gear positions are changed according to the ON
and OFF condition of these solenoids.

Controls shift stage by turning solenoid ON/OFF. Rela-
tionship between solenoid operation and shifting stage is
shown in table below. When shifting, timing is controlled for
each solenoid to reduce shock.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

No shift
298
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1.Check harness connector between TCM and
shift solenoid 1.
2.Check shift solenoid 1’s ground line.
3.Check shift solenoid 1.
4.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0436
NOTE:
For the diagnostic procedure on shift solenoid 1 circuit,
refer to“3-2 [T7E0]”.



299
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0442
AZ: DTC P0758
—SHIFT SOLENOID B (SHIFT SOLENOID 2)
ELECTRICAL (SFT2)—
OBD0048D
DESCRIPTION:

These solenoids are mounted to the control valve. They
are turned ON or OFF according to signals sent from the
TCM. The gear positions are changed according to the ON
and OFF condition of these solenoids.

Controls shift stage by turning solenoid ON/OFF. Rela-
tionship between solenoid operation and shifting stage is
shown in table below. When shifting, timing is controlled for
each solenoid to reduce shock.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

No shift
300
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1.Check harness connector between TCM and
shift solenoid 2.
2.Check shift solenoid 2’s ground line.
3.Check shift solenoid 2.
4.Check output signal emitted from TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0444
NOTE:
For the diagnostic procedure on shift solenoid 2 circuit,
refer to“3-2 [T7D0]”.



301
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0611
BA: DTC P0760
—SHIFT SOLENOID C (SHIFT SOLENOID 3)
MALFUNCTION (OVR
—F)—
OBD0048E
DESCRIPTION:

This solenoid is also mounted to the control valve. It is
turned ON or OFF according to the signal sent from the
TCM. This operation controls the engagement and disen-
gagement of the overrunning clutch.

Controls 3-2 shift timing and overrunning clutch opera-
tion. Shift timing is controlled by controlling release speed
of oil pressure to reduce shock while down shifting. The
overrunning clutch is controlled so that it will operate dur-
ing coasting to apply engine brake.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Ineffective engine brake with selector lever in“3”
302
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1.Check any other DTC (besides DTC P0760) on
display.
2.Check inhibitor switch circuit. DTC P0705 [T11AN0]”.>
3.Check gear position.
4.Check shift solenoid 1 circuit. [T7E0]”.>
5.Check shift solenoid 2 circuit. [T7D0]”.>
6.Check shift solenoid 3 circuit. [T7C0]”.>
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>





303
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:
OBD0613
1CHECK ANY OTHER DTC (BESIDES DTC
P0760) ON DISPLAY.
: Is there any other DTC on display?
: Inspect relevant DTC using“11. Diagnostics Chart
with Trouble Code”.
: Go to step 2.
2
CHECK INHIBITOR SWITCH CIRCUIT.
: Is there any trouble in inhibitor switch cir-
cuit?
: Repair or replace inhibitor switch circuit.
: Go to step 3.
OBD0145A
3
CHECK GEAR POSITION.
1) Turn ignition switch to OFF.
2) Connect the Subaru select monitor to data link connec-
tor.
304
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code