1995 SUBARU LEGACY engine

E: FUEL PUMP CIRCUIT
1.Check operating sound of fuel pump.
2.Check ground circuit of fuel pump.
3.Check power supply to fuel pump.
4.Check harness connector between fuel pump
and fuel pump relay.
5.Check fuel pump relay.
6.Check harness connector between ECM and
fuel pump relay.
WIRING DIAGRAM:

LHD model
OBD0131





120
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

WIRING DIAGRAM:

RHD model
B2M0446
121
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

1
CHECK OPERATING SOUND OF FUEL PUMP.
Make sure that fuel pump is in operation for two seconds
when turning ignition switch to ON.
: Does fuel pump produce operating sound?
: Check fuel injector circuit.
: Go to step 2.
OBD0132A
2
CHECK GROUND CIRCUIT OF FUEL PUMP.
1) Turn ignition switch to OFF.
2) Disconnect connector from fuel pump.
3) Measure resistance of harness connector between fuel
pump and body.
: Connector & terminal
(R58) No. 4—Body /10Ω, or less
: Go to step 3.
: Repair open circuit of fuel pump ground circuit.
OBD0133A
3
CHECK POWER SUPPLY TO FUEL PUMP.
1) Turn ignition switch to ON.
2) Measure voltage of power supply circuit between fuel
pump connector and body.
: Connector & terminal
(R58) No. 1—Body /10 V, or more
: Replace fuel pump.
: Go to step 4.
OBD0134A
4CHECK HARNESS CONNECTOR BETWEEN
FUEL PUMP AND FUEL PUMP RELAY.
1) Turn ignition switch to OFF.
2) Measure resistance of harness connector between fuel
pump and fuel pump relay.
: Connector & terminal
(R58) No. 1—(B46) No. 4/10Ω, or less
: Go to next.
: Repair open circuit of harness between fuel pump
and fuel pump relay connector.
: Connector & terminal
(R58) No. 1—Body/1 MΩ, or more
: Go to step 5.
: Repair short circuit of harness between fuel pump
and fuel pump relay connector.
122
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

G2M0461
5
CHECK FUEL PUMP RELAY.
1) Disconnect connectors from fuel pump relay and main
relay.
2) Remove fuel pump relay and main relay with bracket.
3) Connect battery to fuel pump relay connector terminals
No. 1 and No. 3.
4) Measure resistance between connector terminals of
fuel pump relay.
: Terminals
No. 2—No. 4/10Ω, or less
: Go to step 6.
: Replace fuel pump relay.
OBD0136A
6CHECK HARNESS CONNECTOR BETWEEN
ECM AND FUEL PUMP RELAY.
1) Disconnect connectors from ECM.
2) Measure resistance of harness connector between
ECM and fuel pump relay.
: Connector & terminal
(B84) No. 84—(B46) No. 3/10Ω, or less
: Repair harness between ECM and fuel pump
relay connector.
: Confirm good connection in ECM connector.
123
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

F: FUEL INJECTOR CIRCUIT
1.Check output signal from ECM.

2.Check harness.
3.Check harness.
4.Check fuel injector.
5.Check power supply.
CAUTION:

Check or repair only faulty parts.

After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. [T3D0] and [T3E0].>
WIRING DIAGRAM:

LHD model
OBD0137



124
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

WIRING DIAGRAM:

RHD model
B2M0447
NOTE:
For the diagnostic procedure on fuel injector circuit, refer to
“2-7 [T11Q0]”.
125
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

G: CRANKSHAFT POSITION SENSOR
CIRCUIT
1.Check harness.
2.Check crankshaft position sensor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
OBD0109
NOTE:
For the diagnostic procedure on crankshaft position sensor
circuit, refer to“2-7 [T11Z0]”.

126
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure

H: CAMSHAFT POSITION SENSOR CIRCUIT
1.Check harness.
2.Check camshaft position sensor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
OBD0115
NOTE:
For the diagnostic procedure on crankshaft position sensor
circuit, refer to“2-7 [T11AA]”.

127
2-7ON-BOARD DIAGNOSTICS II SYSTEM
9. Diagnostics for Engine Starting Failure