1996 SUBARU LEGACY check engine

G2M0461
8E5
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:
Is the resistance less than 10Ω?
: Go to step8E6.
: Replace fuel pump relay.
B2M0527A
8E6CHECK HARNESS BETWEEN ECM AND
FUEL PUMP RELAY CONNECTOR.
1) Disconnect connectors from ECM.
2) Measure resistance of harness between ECM and fuel
pump relay connector.
: Connector & terminal
(B84) No. 32—(B46) No. 3:
Is the resistance less than 1Ω?
: Go to next.
: Repair harness between ECM and fuel pump
relay connector.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Check fuel injector circuit.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

F: FUEL INJECTOR CIRCUIT
8F1Check output signal from ECM.

8F2Check harness between ECM and fuel injector
connector.
8F3Check harness between ECM and fuel injector
connector.
8F4Check fuel injector.
8F5Check power supply.
CAUTION:

Check or repair only faulty parts.

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

WIRING DIAGRAM:

LHD Model
B2M0528



109
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

G: CRANKSHAFT POSITION SENSOR
CIRCUIT
8G1Check harness between ECM and crankshaft
position sensor connector.
8G2Check crankshaft position sensor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
B2M0529
NOTE:
For the diagnostic procedure on crankshaft position sensor
circuit, refer to 2-7 [T10AB0].

111
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

H: CAMSHAFT POSITION SENSOR CIRCUIT
8H1Check harness between ECM and camshaft
position sensor connector.
8H2Check camshaft position sensor.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
B2M0530
NOTE:
For the diagnostic procedure on camshaft position sensor
circuit, refer to 2-7 [T10AC0].

11 2
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

I: FUEL PUMP CIRCUIT (2200 cc AWD
EXCEPT TAIWAN MODEL)
8I1Check operating sound of fuel pump.
8I2Check ground circuit of fuel pump.
8I3Check power supply to fuel pump.
8I4Check harness between fuel pump and fuel
pump relay connector.
8I5Check fuel pump relay.
8I6Check harness between ECM and fuel pump
relay connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.






11 3
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

WIRING DIAGRAM:

RHD Model
B2M1014
8I1CHECK 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?
NOTE:
Fuel pump operation check can also be executed using
Subaru Select Monitor (Function mode: FD01).
For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”2-7 [T3F0].
: Check fuel injector circuit.
: Go to step8I2.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

OBD0132A
8I2CHECK 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 chassis ground.
: Connector & terminal
(R58) No. 4—Chassis ground:
Is the resistance less than 5Ω?
: Go to step8I3.
: Repair open circuit in fuel pump ground circuit.
OBD0133A
8I3
CHECK POWER SUPPLY TO FUEL PUMP.
1) Turn ignition switch to ON.
2) Measure voltage of power supply circuit between fuel
pump connector and chassis ground.
: Connector & terminal
(R58) No. 1 (+)—Chassis ground ():
Is the voltage more than 10 V?
: Replace fuel pump.
: Go to step8I4.
B2M0526A
8I4CHECK HARNESS BETWEEN FUEL
PUMP AND FUEL PUMP RELAY CON-
NECTOR.
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:
Is the resistance less than 1Ω?
: Go to next.
: Repair open circuit in harness between fuel pump
and fuel pump relay connector.
: Connector & terminal
(R58) No. 1—Chassis ground:
Is the resistance more than 1 MΩ?
: Go to step8I5.
: Repair short circuit in harness between fuel pump
and fuel pump relay connector.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure

G2M0461
8I5
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:
Is the resistance less than 10Ω?
: Go to step8I6.
: Replace fuel pump relay.
B2M0527A
8I6CHECK HARNESS BETWEEN ECM AND
FUEL PUMP RELAY CONNECTOR.
1) Disconnect connectors from ECM.
2) Measure resistance of harness between ECM and fuel
pump relay connector.
: Connector & terminal
(B84) No. 32—(B46) No. 3:
Is the resistance less than 1Ω?
: Go to next.
: Repair harness between ECM and fuel pump
relay connector.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Check fuel injector circuit.
11 7
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for Engine Starting Failure