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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 >> Fuel Rail Pressure Sensor >> Component Inspection
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Component Inspection

  1. CHECK FRP SENSOR 

    SYMBOL 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 "FUEL PRES SEN V" indication.

      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

    SYMBOL WITHOUT CONSULT

    1. Turn ignition switch OFF.
    2. Reconnect harness connector disconnected.
    3. Start the engine.
    4. Check FRP sensor signal voltage.

    +

    -

    Condition

    Value

    (Approx.)

    ECM

    Connector

    Terminal

    Connector

    Terminal

    F91

    25

    F91

    13

    [Engine is running]

    • Warm-up condition
    • Idle speed

    0.82 - 1.22 V

    [Engine is running]

    • Warm-up condition
    • Revving engine from idle to 4, 000 rpm quickly

    0.82 - 3.06 V

    Is the inspection result normal?

    YES

    INSPECTION END.

    NO

    Replace FRP sensor. Refer to FUEL INJECTOR AND FUEL TUBE : Exploded View .