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Home >> Infiniti >> 2024 >> QX80 Sensory, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2 Of 2) >> Component /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 .