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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1550 To P2A03 >> DTC P2138: App Sensor >> Component Inspection (Accelerator Pedal Position Sensor)
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Component Inspection (Accelerator Pedal Position Sensor)

  1. CHECK ACCELERATOR PEDAL POSITION SENSOR
    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Turn ignition switch ON.
    4. Check the voltage ECM harness connector terminals under the following conditions.
    ECM Condition Voltage (V)
    Connector + -
    Terminal terminal
    E80 136 (APP sensor 1) 140 Accelerator pedal Fully released 0.5 - 1.0
    Fully depressed 4.2 - 4.8
    126 (APP sensor 2) 129 Fully released 0.25 - 0.5
    Fully depressed 2.0 - 2.5

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: GO TO 2.

  2. REPLACE ACCELERATOR PEDAL ASSEMBLY

    Replace accelerator pedal assembly. Refer to "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (Without distance control assist system) or "MODELS WITH DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (With distance control assist system).

    : INSPECTION END