TROUBLE DIAGNOSES - Diagnostic Procedure 32 (Cont'd)
EF & EC-4027flowchartDiagnostic Procedure 32 (Cont'd)
1
INSPECTION START
2
CHECK OVERALL FUNCTION. 1) Turn ignition switch ON. 2) Listen to fuel pump operating sound. Fuel pump should operate for 5 seconds after ignition switch is turned ON.
OK
INSPECTION END
NG
3
CHECK POWER SUPPLY. 1) Turn ignition switch OFF. 2) Disconnect fuel pump relay. 3) Turn ignition switch ON. 4) Check voltage between fuel pump relay terminals 2, 5 and ground. Voltage: Battery voltage
NG
Check the following: 15A fuse; Harness continuity between fuse and fuel pump relay. If NG, repair harness or connectors.
OK
4
CHECK GROUND CIRCUIT. 1) Turn ignition switch OFF. 2) Disconnect fuel pump harness connector. 3) Check harness continuity between fuel pump connector terminal b and body ground, fuel pump connector terminal a and fuel pump relay terminal 3. Continuity should exist.
NG
Repair harness or connectors.
OK
5
CHECK OUTPUT SIGNAL CIRCUIT. 1) Disconnect ECM harness connector. 2) Check harness continuity between ECM terminal 104 (Australia), 106 (Except Australia) and fuel pump relay terminal 1. Continuity should exist.
NG
Check the following: Harness connectors F22, M18; Harness continuity between ECM and fuel pump relay. If NG, repair harness or connectors.
OK
6
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