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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P2122, P2123: App Sensor >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK APP SENSOR 1 POWER SUPPLY

    1. Disconnect accelerator pedal position (APP) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between APP sensor harness connector and ground.
      + - Voltage
      (Approx.)
      APP sensor
      Connector Terminal
      E31*1 4 Ground 5 V
      E74*2

      *1:Without ICC

      *2:With ICC

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF
    2. Disconnect ECM harness connector.
    3. Check the voltage between APP sensor harness connector and ground.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E31*1 4 E32 146 Existed
      E74*2

      *1:Without ICC

      *2:With ICC

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Repair or replace error-detected parts.

  3. CHECK APP SENSOR 1 GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between APP sensor harness connector and ECM harness connector.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E31*1 2 E32 151 Existed
      E74*2 5

      *1:Without ICC

      *2:With ICC

    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

  4. CHECK APP SENSOR 1 INPUT SIGNAL CIRCUIT

    1. Check the continuity between APP sensor harness connector and ECM harness connector.
      APP sensor ECM Continuity
      Connector Terminal Connector Terminal
      E31*1 3 E32 150 Existed
      E74*2 6

      *1:Without ICC

      *2:With ICC

    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

  5. CHECK APP SENSOR

    Check APP sensor. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Replace accelerator pedal assembly. Refer to REMOVAL AND INSTALLATION or REMOVAL AND INSTALLATION .

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