Diagnosis Procedure
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".
- CHECK HARNESS CONNECTOR
- Turn ignition switch OFF.
- Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor connection.
Is the inspection result normal?
YES: GO TO 2
NO: Repair or replace terminals or connectors.
- CHECK FUEL LEVEL SENSOR UNIT CIRCUIT
- Disconnect combination meter connector and fuel level sensor unit connector.
- Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump harness connector.
Terminals Continuity (+) (-) Connector Terminal Connector Terminal C5 2 M24 9 Yes - Check continuity between fuel level sensor unit and fuel pump harness connector and ground.
Fig 1: Checking Continuity Between Combination Meter Connector Terminal 9 And Fuel Level Sensor Unit Terminal 2Courtesy of NISSAN NORTH AMERICA, INC.
Terminals Continuity (+) (-) Connector Terminal Ground C5 2 No Is the inspection result normal?
YES: GO TO 3
NO: Repair harness or connector.
- CHECK FUEL LEVEL SENSOR UNIT GROUND CIRCUIT
- Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump harness connector.
Terminals Continuity (+) (-) Connector Terminal Connector Terminal C5 5 M24 4 Yes - Check continuity between fuel level sensor unit and fuel pump harness connector and ground.
Fig 2: Checking Continuity Between Combination Meter Connector Terminal 4 And Fuel Level Sensor Unit Terminal 5Courtesy of NISSAN NORTH AMERICA, INC.
Terminals Continuity (+) (-) Connector Terminal Ground C5 5 No Is the inspection result normal?
YES: GO TO 4
NO: Repair harness or connector.
- Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump harness connector.
- CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the internal components in the fuel tank.
Is the inspection result normal?
YES: Inspection End.
NO: Install the fuel level sensor unit properly.