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Home >> Infiniti >> 1994 >> Q45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Delivery >> Fuel Pump
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Fuel Pump

Remove fuel tank filler cap. Turn ignition on. Listen for fuel pump operating noise. If noise is not present, check fuel pump relay and wiring harness between relay and pump. Check operation of fuel pump control unit. If fuel pump control unit is okay, disconnect fuel pump/sending unit connector at fuel tank and check resistance across fuel pump winding terminals. See FUEL PUMP TERMINAL IDENTIFICATION table. Ohmmeter should indicate .5 ohm. If resistance is not correct, replace fuel pump.

FUEL PUMP TERMINAL IDENTIFICATION

Application Wire Colors
Q45 White & Orange/Blue
Fig 1: Identifying ECM Terminals
G94J44189Courtesy of NISSAN MOTOR CO., U.S.A.