Trouble Diagnoses - Diagnostic Procedure 33 (Cont'd)
EF & EC-597flowchartL.H.D. and R.H.D. models use different ground-circuit harness connectors (M64/B12 vs M51/B12).
Diagnostic Procedure 33 (Cont'd)
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INSPECTION START
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A - CHECK OVERALL FUNCTION. 1) Turn ignition switch "ON". 2) Listen to fuel pump operating sound. Fuel pump should operate for 1 second after ignition switch is turned "ON".
O.K.
INSPECTION END
N.G.
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B - CHECK POWER SUPPLY. 1) Turn ignition switch "OFF". 2) Disconnect fuel pump relay. 3) Turn ignition switch "ON". 4) Check voltage between terminals 2, 3 and ground. Voltage: Battery voltage
N.G.
Check the following. - Harness connectors M11, M104 - 15A fuse - Harness continuity between fuse and fuel pump relay. If N.G., repair harness or connectors.
O.K.
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C - CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect fuel pump harness connector. 3) Check harness continuity between terminal 5 and body ground, terminal 6 and terminal 5. Continuity should exist.
N.G.
Check the following. - Harness connectors B18, M51 - Harness connectors M37, M104 - Harness connectors M64, B12 (L.H.D. models) - Harness connectors M51, B12 (R.H.D. models) - Harness continuity between fuel pump and body ground - Harness continuity between fuel pump and fuel pump relay. If N.G., repair harness or connectors.
Check the following. - Harness connectors B18, M51 - Harness connectors M37, M104 - Harness connectors M64, B12 (L.H.D. models) - Harness connectors M51, B12 (R.H.D. models) - Harness continuity between fuel pump and body ground - Harness continuity between fuel pump and fuel pump relay. If N.G., repair harness or connectors.
O.K.
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D - CHECK OUTPUT SIGNAL CIRCUIT. 1) Disconnect E.C.U. harness connector. 2) Check harness continuity between E.C.U. terminal 104 and terminal 1. Continuity should exist.
N.G.
Check the following: - Harness connectors F33, M37 - Harness connectors M11, M104 - Harness continuity between E.C.U. and fuel pump relay. If N.G., repair harness or connectors.
Check the following: - Harness connectors F33, M37 - Harness connectors M11, M104 - Harness continuity between E.C.U. and fuel pump relay. If N.G., repair harness or connectors.
O.K.
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