Fuel Pump System Test (Maxima VE30DE)
- Turn ignition on. Listen for fuel pump operating sound. Fuel pump should operate for 5 seconds after ignition is turned on. If operating sound is not heard, go to next step. If operating sound is heard, system is functioning properly.
- Turn ignition off. Disconnect fuel pump relay. Fuel pump relay is located inside trunk trim, near striker. Turn ignition on. Measure voltage between ground and fuel pump relay harness connector terminals No. 2 (Blue wire) and No. 3 (Blue wire). See Fig 1
. Battery voltage should be present. If battery voltage is present, go to next step. If battery voltage is not present, check 10-amp fuse in main fuse box. Check harness continuity between fuse and fuel pump relay. Repair or replace as necessary.
- Turn ignition off. Disconnect fuel pump harness connector, located under rear seat cushion. Check continuity between ground and fuel pump harness connector terminal "a" (Black wire). Check continuity between fuel pump relay harness connector terminal No. 5 (Red/Blue wire) and fuel pump harness connector terminal "c" (Red/Blue wire). See Fig 1
. Continuity should exist in both checks. If continuity exists in both checks, go to next step. If continuity does not exist in either check, repair appropriate harness or connectors.
- Ensure ignition is off. Disconnect ECM harness connector. ECM is located under center of instrument panel (connector is on driver's side). Check continuity between ECM harness connector terminal No. 18 (Brown/Yellow wire) and fuel pump relay harness connector No. 1 (Blue/White wire). See Figure
, Figure
and Fig 1
. Continuity should exist. If continuity exists, check fuel pump relay. See RELAYS
under RELAYS & SOLENOIDS. If relay is okay, check fuel pump. See FUEL PUMP TEST. If continuity does not exist, check harness between ECM and relay. Repair harness and connectors as necessary.
Courtesy of NISSAN MOTOR CO., U.S.A.