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Home >> Nissan-Datsun >> 2009 >> 370Z Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter, Warning Lamp & Indicator >> Component 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 terminal and ground.
      TERMINALS VOLTAGE REFERENCE

      Terminals Voltage (Approx.)
      (+) (-)
      Combination meter Ground
      Connector Terminal
      M54 34
      G05891061Courtesy of NISSAN MOTOR CO., U.S.A.

      Does it match fuel gauge reading? 

      YES: GO TO 2.

      NO: Replace the combination meter.

  2. CHECK FUEL LEVEL SENSOR CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector and fuel level sensor unit (sub) connector.
    3. Check continuity between combination meter harness connector terminal and fuel level sensor unit (sub) harness connector terminal.
      TERMINALS CONTINUITY REFERENCE

      Combination meter Fuel level sensor unit (sub) Continuity
      Connector Terminal Connector Terminal
      M54 34 B21 1 Existed
    4. Check continuity between combination meter harness connector terminal and ground.
      TERMINALS CONTINUITY REFERENCE

      Combination meter Ground Continuity
      Connector Terminal
      M54 34 Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK FUEL LEVEL SENSOR UNIT (MAIN-SUB) CIRCUIT
    1. Disconnect fuel level sensor unit (main) connector.
    2. Check for continuity between the fuel level sensor unit (sub) harness connector and the fuel level sensor unit (main) harness connector.
      TERMINALS CONTINUITY REFERENCE

      Fuel level sensor unit (sub) Fuel level sensor unit (main) Continuity
      Connector Terminal Connector Terminal
      B21 2 B22 2 Existed
    3. Check for continuity between the fuel level sensor unit (sub) harness connector and the ground.
      TERMINALS CONTINUITY REFERENCE

      Combination meter Ground Continuity
      Connector Terminal
      B21 2 Not existed

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair harness or connector.

  4. CHECK FUEL LEVEL SENSOR GROUND CIRCUIT

    Check continuity between fuel level sensor unit (main) harness connector terminal and combination meter harness connector terminal.

    TERMINALS CONTINUITY REFERENCE

    Fuel level sensor unit (main) Combination meter Continuity
    Connector Terminal Connector Terminal
    B22 5 M54 24 Existed

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Repair harness or connector.

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