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Home >> Infiniti >> 2010 >> M35 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1217 To P2A03 >> DTC P1239, P2135: TP Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connections M16, M70. Refer to "GROUND INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connections.

  2. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
    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.
      Fig 1: Checking Voltage Between Electric Throttle Control Actuator Terminals And Ground
      G06306509Courtesy of NISSAN MOTOR CO., U.S.A.
      CONNECTOR TERMINAL VOLTAGE CHART

      DTC Electric throttle control actuator Ground Voltage (V)
      Bank Connector Terminal
      P1239 2 F51 1 Ground Approx. 5
      P2135 1 F31 6

      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 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.
      CONNECTOR TERMINAL CONTINUITY CHART

      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P1239 2 F51 4 F105 48 Existed
      P2135 1 F31 3 40
    4. 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 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      CONNECTOR TERMINAL CONTINUITY CHART

      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P1239 2 F51 2 F105 31 Existed
      3 35
      P2135 1 F31 4 30
      5 34
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 5.

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

  5. CHECK THROTTLE POSITION SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: GO TO 6.

  6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
    1. Replace malfunctioning electric throttle control actuator.
    2. "SPECIAL REPAIR REQUIREMENT "

      INSPECTION END

  7. CHECK INTERMITTENT INCIDENT

    Refer to "DESCRIPTION ".

    INSPECTION END

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