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Home >> Infiniti >> 2013 >> M56 Base >> Repair and Diagnosis >> Electrical >> Gauges >> Meter, Warning Lamp & Indicator >> DTC/Circuit Diagnosis >> Fuel Level Sensor Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. 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 and fuel level sensor unit (sub) harness connector.
      Combination meter Fuel level sensor unit (sub) Continuity
      Connector Terminal Connector Terminal
      M53 34 B21 1 Existed
    4. Check continuity between combination meter harness connector and ground.
      Combination meter Ground Continuity
      Connector Terminal
      M53 34 Not existed

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair harness or connector.

  2. CHECK FUEL LEVEL SENSOR UNIT (MAIN-SUB) CIRCUIT 
    1. Disconnect fuel level sensor unit and fuel pump (main) connector.
    2. Check for continuity between the fuel level sensor unit (sub) harness connector and the 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 B241 2 Existed
    3. Check for continuity between the fuel level sensor unit (sub) harness connector and the ground.
      Fuel level sensor unit (sub) Ground Continuity
      Connector Terminal
      B21 2 Not existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK FUEL LEVEL SENSOR GROUND CIRCUIT 
    1. Check continuity between fuel level sensor unit and fuel pump (main) harness connector and combination meter harness connector.
      Fuel level sensor unit and fuel pump (main) Combination meter Continuity
      Connector Terminal Connector Terminal
      B241 5 M53 24 Existed
    2. Check for continuity between the fuel level sensor unit and fuel pump (main) harness connector and the ground.
      Fuel level sensor unit and fuel pump (main) Ground Continuity
      Connector Terminal
      B241 5 Not existed

      Is the inspection result normal? 

      YES: Replace combination meter. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair harness or connector.

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