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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing (For MEXICO) >> High Pressure Fuel Pump >> Component Function Check

Component Function Check

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  1. CHECK HIGH PRESSURE FUEL PUMP FUNCTION

    WITH CONSULT

    1. Start engine.
    2. Check "FUEL PRES SEN V" in "DATA MONITOR" mode with CONSULT.
      Monitor Item Condition Values/Status
      FUEL PRES SEN V Engine speed: Idle 820 - 1, 220 mV
      Engine speed: Revving engine from idle to 4, 000 rpm quickly 820 - 3, 060 mV

    WITHOUT CONSULT

    1. Start engine.
    2. Check the voltage between ECM harness connector and ground.
      ECM Condition Voltage
      + -
      Connector Terminal Connector Terminal
      F110 105 E80 175 [Engine is running]
      • Warm-up condition
      • Idle speed
      NOTE: The pulse cycle changes depending on rpm at idle
      BATTERY VOLTAGE (11 - 14 V)(1)
      G08257135Courtesy of NISSAN NORTH AMERICA, INC.
      [Engine is running]
      • Warm-up condition
      • Engine speed: 2, 000 rpm
      BATTERY VOLTAGE (11 - 14 V)(1)
      G08257136Courtesy of NISSAN NORTH AMERICA, INC.
      (1) Under the following conditions
      • A/C switch: OFF
      • Electric load: OFF (Lights, heater fan&rear window defogger)
      • Steering wheel: Kept in straight-ahead position

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Proceed to "DIAGNOSIS PROCEDURE ".