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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 Through P0456 >> DTC P0191: FRP Sensor >> Component Inspection (Fuel Rail Pressure Sensor)

Component Inspection (Fuel Rail Pressure Sensor)

  1. CHECK FRP SENSOR

    WITH CONSULT-III

    1. Turn ignition switch OFF.
    2. Reconnect harness connector disconnected.
    3. Start the engine.
    4. Select "DATA MONITOR" mode with CONSULT-III.
    5. Check that the "FUEL PRES SEN V" indication.
      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. Turn ignition switch OFF.
    2. Reconnect harness connector disconnected.
    3. Start the engine.
    4. Check FRP sensor signal voltage.
      VOLTAGE SPECIFICATION

      + - Condition Value (Approx.)
      ECM
      Connector Terminal Connector Terminal
      F111 31 F111 40 [Engine is running]
      • Warm-up condition
      • Idle speed
      0.98 - 1.2 V
      [Engine is running]
      • Warm-up condition
      • Revving engine from idle to 4, 000 RPM quickly
      1.1 - 2.9 V

      Is the inspection result normal? 

      YES: INSPECTION END.

      NO: Replace FRP sensor. Refer to "EXPLODED VIEW ".