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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis >> Electrical >> Gauges >> Meter, Warning Lamp & Indicator (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC B1402-11, B1402-13: Fuel Level Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (FUEL LEVEL SENSOR) (MAIN) CIRCUIT 
    1. Ignition switch OFF.
    2. Disconnect combination meter harness connector and fuel level sensor unit and fuel pump (fuel level sensor) (main) harness connector.
    3. Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump (fuel level sensor) (main) harness connector.

      Combination meter

      Fuel level sensor unit and fuel pump (fuel level sensor) (main)

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M77

      54

      M195

      3

      Yes

    4. Check continuity between combination meter harness connector and ground.

      Combination meter

      --

      Continuity

      Connector

      Terminal

      M77

      54

      Ground

      No

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Repair harness or connector.

  2. CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (FUEL LEVEL SENSOR) (MAIN) GROUND CIRCUIT 

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

    Fuel level sensor unit and fuel pump (fuel level sensor) (main)

    Combination meter

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    M195

    2

    M77

    46

    Yes

    Is the inspection result normal?

    YES

    Replace combination meter. Refer to Removal and Installation .

    NO

    Repair harness or connector.