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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1217 To P2539 (For MEXICO) >> DTC P2539: Low Fuel Pressure Sensor >> Component Inspection

Component Inspection

  1. CHECK LOW FUEL PRESSURE SENSOR

    WITH CONSULT

    1. Turn ignition switch OFF.
    2. Reconnect harness connector disconnected.
    3. Start the engine.
    4. Select "DATA MONITOR" mode with CONSULT.
    5. Check that the "L/FUEL PRES SEN V" value.
      Data monitor item Condition Value (Approx.)
      L/FUEL PRES SEN V Engine speed: idle 3, 000 --3, 300 mV
      Engine speed: 3, 000 rpm (no load)

    WITHOUT CONSULT

    1. Turn ignition switch OFF.
    2. Reconnect harness connector disconnected.
    3. Start the engine.
    4. Check low fuel pressure sensor signal voltage.
      + - Condition Value (Approx.)
      Low fuel pressure sensor Ground
      Connector Terminal
      F25 2 Ground [Engine is running]
      • Warm-up condition
      • Idle speed
      G08257129Courtesy of NISSAN NORTH AMERICA, INC.
      [Engine is running]
      • Warm-up condition
      • Engine speed: 2, 000 rpm
      G08257130Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: INSPECTION END.

      NO: Replace low fuel pressure sensor. Refer to "REMOVAL AND INSTALLATION ".