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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Component Testing >> High Pressure Fuel Pump >> Component Function Check
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Component Function Check

  1. CHECK HIGH PRESSURE FUEL PUMP FUNCTION

    WITH CONSULT-III

    1. Start engine.
    2. Check "FUEL PRES SEN V" in "DATA MONITOR" mode with CONSULT-III.
      MONITOR ITEM CONDITION

      Monitor Item Condition Values/Status
      FUEL PRES SEN V Engine speed: Idle 980 - 1, 200 mV
      Engine speed: Revving engine from idle to 4, 000 RPM quickly 1, 100 - 2, 900 mV

    WITHOUT CONSULT-III

    1. Start engine.
    2. Check the voltage between ECM harness connector and ground.
      VOLTAGE SPECIFICATION

      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)*
      G07020365Courtesy of NISSAN MOTOR CO., U.S.A.
      [Engine is running]
      • Warm-up condition
      • Engine speed: 2, 000 RPM
      BATTERY VOLTAGE (11 - 14 V)*
      G07020366Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Proceed to "DIAGNOSIS PROCEDURE ".