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Home >> Infiniti >> 2012 >> EX35 Base, RWD >> 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 UNIFIED METER AND A/C AMP. INPUT SIGNAL
    1. Turn ignition switch ON.
    2. Check voltage between unified meter and A/C amp. harness connector and ground.
      Terminals Voltage (Approx.)
      (+) (-)
      Unified meter and A/C amp. Ground
      Connector Terminal
      M67 42
      G05223669

      Does it match fuel gauge reading? 

      YES: GO TO 2.

      NO: Replace unified meter and A/C amp.

  2. CHECK FUEL LEVEL SENSOR (SUB) CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect unified meter and A/C amp. connector and fuel level sensor unit (sub) connector.
    3. Check continuity between unified meter and A/C amp. harness connector and fuel level sensor unit (sub) harness connector.
      Unified meter and A/C amp. Fuel level sensor unit (sub) Continuity
      Connector Terminal Connector terminal
      M67 42 B21 1 Existed
    4. Check continuity between unified meter and A/C amp. harness connector and ground.
      Unified meter and A/C amp. Ground Continuity
      Connector Terminal
      M67 42 Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT
    1. Disconnect fuel level sensor unit and fuel pump (main) connector.
    2. Check continuity between fuel level sensor unit (sub) harness connector and fuel level sensor unit and fuel pump (main) harness connector.
      Fuel level sensor unit (sub) Fuel level sensor unit and fuel pump (main) Continuity
      Connector Terminal Connector terminal
      B21 2 B22 2 Existed
    3. Check continuity between fuel level sensor unit (sub) harness connector and ground.
      Fuel level sensor unit (sub) 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 (MAIN) CIRCUIT

    Check continuity between fuel level sensor unit and fuel pump (main) harness connector and unified meter and A/C amp. harness connector.

    Fuel level sensor unit and fuel pump (main) Unified meter and A/C amp. Continuity
    Connector Terminal Connector terminal
    B22 5 M67 58 Existed

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Repair harness or connector.

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