Diagnostic Procedure 33 (Cont'd) - FUEL PUMP
EF & EC-501flowchartSR20DE. Ground circuit harness connectors differ for B13 models (B12/B4), N14 L.H.D. models (M4/M32) and N14 R.H.D. models (M54/M32).
TROUBLE DIAGNOSES
Diagnostic Procedure 33 (Cont'd)
Diagnostic Procedure 33 - FUEL PUMP
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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 5 seconds 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, M36 - 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 2 and terminal 5. Continuity should exist.
N.G.
Check the following. - Harness connectors B18, B51 - Harness connectors B12, B4 (B13 models) - Harness connectors M4, M32 (N14 L.H.D. models) - Harness connectors M54, M32 (N14 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, B51 - Harness connectors B12, B4 (B13 models) - Harness connectors M4, M32 (N14 L.H.D. models) - Harness connectors M54, M32 (N14 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 M11, M36 - Harness connectors F30, M57 - Harness continuity between E.C.U. and fuel pump relay If N.G., repair harness or connectors.
Check the following. - Harness connectors M11, M36 - Harness connectors F30, M57 - Harness continuity between E.C.U. and fuel pump relay If N.G., repair harness or connectors.
O.K.
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