LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2013 >> M56 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1087 To P2542 >> DTC P1239, P2135: TP Sensor >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

  1. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I 
    1. Disconnect electric throttle control actuator harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between electric throttle control actuator harness connector and ground.
      DTC Electric throttle control actuator Ground Voltage (V)
      Bank Connector Terminal
      P1239 2 F64 2 Ground Approx. 5
      P2135 1 F66 2

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  2. CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P1239 2 F64 4 F111 69 Existed
      P2135 1 F66 4 97
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  3. CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P1239 2 F64 1 F111 71 Existed
      3 89
      P2135 1 F66 1 91
      3 79
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  4. CHECK THROTTLE POSITION SENSOR 

    Refer to "COMPONENT INSPECTION (THROTTLE POSITION SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: GO TO 5.

  5. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR 

    Replace malfunctioning electric throttle control actuator. Refer to "REMOVAL AND INSTALLATION ".

    : INSPECTION END

  6. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

scientia non olet · About LEMON Manuals