LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter, Warning Lamp & Indicator >> DTC/Circuit Diagnosis >> Fuel Level Sensor Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK COMBINATION METER INPUT SIGNAL
    1. Turn ignition switch ON.
    2. Check voltage between combination meter harness connector and ground.
      VOLTAGE SPECIFICATION

      Terminals Voltage (Approx.)
      (+) (-)
      Combination meter Ground
      Connector Terminal
      M34 34
      G07026066Courtesy of NISSAN MOTOR CO., U.S.A.

      Does it match fuel gauge reading? 

      YES: GO TO 2.

      NO: Replace the combination meter. Refer to "REMOVAL AND INSTALLATION ".

  2. CHECK FUEL LEVEL SENSOR CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector and fuel level sensor unit connector.
    3. Check continuity between combination meter harness connector and fuel level sensor unit harness connector.
      CONTINUITY SPECIFICATION

      Combination meter Fuel level sensor unit Continuity
      Connector Terminal Connector Terminal
      M34 34 C5 2 Existed
    4. Check continuity between combination meter harness connector and ground.
      CONTINUITY SPECIFICATION

      Combination meter Ground Continuity
      Connector Terminal
      M34 34 Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK FUEL LEVEL SENSOR GROUND CIRCUIT

    Check continuity between fuel level sensor unit harness connector and combination meter harness connector.

    CONTINUITY SPECIFICATION

    Fuel level sensor unit Combination meter Continuity
    Connector Terminal Connector Terminal
    C5 5 M34 24 Existed

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Repair harness or connector.