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Home >> Infiniti >> 2023 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Diagnostics) (1 Of 2) >> Component Parts /Circuit Diagnosis >> Low Pressure Fuel Pump >> Component Inspection
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Component Inspection

  1. CHECK FUEL PRESSURE REGULATOR 
    1. Turn ignition switch OFF.
    2. Check low fuel pressure. Refer to Work Procedure .

    Is inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 2.

  2. CHECK LOW PRESSURE FUEL PUMP 
    1. Turn ignition switch OFF.
    2. Disconnect fuel level sensor unit and fuel pump.
    3. Check resistance between fuel level sensor unit and fuel pump terminals as follows.

      +

      -

      Condition

      Resistance

      Fuel level sensor unit and fuel pump

      Terminals

      1

      3

      Temperature: 25 deg.C (77 deg.F)

      0.2 - 5.0 Ohm

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace fuel level sensor unit and fuel pump. Refer to FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY : Removal & Installation .