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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1070 (Meter, Warning Lamp & Indicator) >> DTC/Circuit Diagnosis >> Fuel Level Sensor Signal Circuit >> Diagnosis Procedure

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 ".

  1. CHECK HARNESS CONNECTOR
    1. Turn ignition switch OFF.
    2. 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.

  2. CHECK FUEL LEVEL SENSOR UNIT CIRCUIT
    1. Disconnect combination meter connector and fuel level sensor unit connector.
    2. 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
    3. 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 2
    G04896544Courtesy 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.

  3. CHECK FUEL LEVEL SENSOR UNIT GROUND CIRCUIT
    1. 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
    2. 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 5
    G04896545Courtesy 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.

  4. 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.

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