check engine SUBARU LEGACY 1995 Service Repair Manual

OBD0723A
4) Measure resistance between ECM harness connector
and body.
: Connector & terminal
(B84) No. 41—Body / 10Ω, or less
: Repair short circuit of harness between ECM con-
nector and data link connector.
: Repair poor contact in ECM connector and data
link connector.
OBD0376
AL: DTC P0601
—INTERNAL CONTROL MODULE MEMORY
CHECK SUM ERROR (RAM)—
DESCRIPTION:
The RAM monitors the ECM microcomputer operation.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Engine does not start.

Engine stalls.
1.Check DTC P0601 on display.
Ye s
Replace ECM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>

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11. Diagnostics Chart with Trouble Code

1.Check harness connector between TCM and
ECM (MFI).
2.Check input signal for TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0405
NOTE:
For the diagnostic procedure on engine speed input circuit,
refer to“3-2 [T7I0]”.

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11. Diagnostics Chart with Trouble Code

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”
1.Check any other DTC (besides DTC P0731,
P0732, P0733, P0734) on display.
2.Check throttle position sensor circuit. “3-2 [T7L0]”.>
3.Check vehicle speed sensor 1 circuit. “3-2 [T7M0]”.>
4.Check vehicle speed sensor 2 circuit. “3-2 [T7N0]”.>
5.Check engine speed input circuit. [T7I0]”.>
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>




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11. Diagnostics Chart with Trouble Code

2CHECK THROTTLE POSITION SENSOR CIR-
CUIT.
: Is there any trouble in throttle position sen-
sor circuit?
: Repair or replace throttle position sensor circuit.
: Go to step 3.
3
CHECK VEHICLE SPEED SENSOR 1 CIRCUIT.
: Is there any trouble in vehicle speed sensor
1 circuit?
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step 4.
4
CHECK VEHICLE SPEED SENSOR 2 CIRCUIT.
: Is there any trouble in vehicle speed sensor
2 circuit?
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step 5.
5
CHECK ENGINE SPEED INPUT CIRCUIT.
: Is there any trouble in engine speed input
circuit?
: 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 with a new one.
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11. Diagnostics Chart with Trouble Code

1.Check any other DTC (besides DTC P0740) on
display.
2.Check duty solenoid B circuit. [T7B0]”.>
3.Check throttle position sensor circuit. “3-2 [T7L0]”.>
4.Check vehicle speed sensor 1 circuit. “3-2 [T7M0]”.>
5.Check vehicle speed sensor 2 circuit. “3-2 [T7N0]”.>
6.Check engine speed input circuit. [T7I0]”.>
7.Check inhibitor switch circuit. DTC P0705 [T11AN0]”.>
8.Check brake light switch circuit. DTC P0703 [T11AM0]”.>
9.Check ATF temperature sensor circuit. “3-2 [T7G0]”.>
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>








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11. Diagnostics Chart with Trouble Code

2
CHECK DUTY SOLENOID B CIRCUIT.
: Is there any trouble in duty solenoid B cir-
cuit?
: Repair or replace duty solenoid B circuit.
: Go to step 3.
3CHECK THROTTLE POSITION SENSOR CIR-
CUIT.
: Is there any trouble in throttle position sen-
sor circuit?
: Repair or replace throttle position sensor circuit.
: Go to step 4.
4
CHECK VEHICLE SPEED SENSOR 1 CIRCUIT.
: Is there any trouble in vehicle speed sensor
1 circuit?
: Repair or replace vehicle speed sensor 1 circuit.
: Go to step 5.
5
CHECK VEHICLE SPEED SENSOR 2 CIRCUIT.
: Is there any trouble in vehicle speed sensor
2 circuit?
: Repair or replace vehicle speed sensor 2 circuit.
: Go to step 6.
6
CHECK ENGINE SPEED INPUT CIRCUIT.
: Is there any trouble in engine speed input
circuit?
: Repair or replace engine speed input circuit.
: Go to step 7.
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11. Diagnostics Chart with Trouble Code

OBD0615
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.
5) Subaru select monitor switch to ON.
6) Designate mode using function key.
Function mode for AT: F10
7) Move selector lever to“D”and drive the vehicle.
8) Read data on Subaru select monitor.
: Change gear position according to throttle
position and vehicle speed.
: Go to next.
: Go to step 4.
: 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 with a new one.
4
CHECK SHIFT SOLENOID 1 CIRCUIT.
: Is there any trouble in shift solenoid 1 cir-
cuit?
: Repair or replace shift solenoid 1 circuit.
: Go to step 5.
5
CHECK SHIFT SOLENOID 2 CIRCUIT.
: Is there any trouble in shift solenoid 2 cir-
cuit?
: Repair or replace shift solenoid 2 circuit.
: Go to step 6.
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11. Diagnostics Chart with Trouble Code

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

Two consecutive trips with fault
TROUBLE SYMPTOM:

Failure of engine to start
1.Check operation of starter motor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0098
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11. Diagnostics Chart with Trouble Code

OBD0489
BG: DTC P1103
—ENGINE TORQUE CONTROL SIGNAL
CIRCUIT MALFUNCTION (TRQ)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Excessive shift shock
1.Check input signal for ECM.
2.Check harness connector between ECM and
TCM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0490

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11. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

RHD model
B2M0461
When DTC P1104 is on display, check engine cooling sys-
tem.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
NOTE:
If the vehicle, with the engine idling, is placed very close to
a wall or another vehicle, preventing normal cooling
function, the OBD system may detect malfunction.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code