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Home >> Infiniti >> 2010 >> FX50 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (VK50VE) - DTC U0101, U0113, U1003, U1001, U1024 & P0011 Through P0159 >> DTC P0122, P0123, P0227, P0228: TP Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in CIRCUIT INSPECTION .

      Is the inspection result normal? 

      YES: GO TO  2.

      NO: Repair or replace ground connection.

  2. CHECK THROTTLE POSITION SENSOR 2 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.
      VOLTAGE REFERENCE TABLE

      DTC Electric throttle control actuator Ground Voltage (V)
      Bank Connector Terminal
      P0122, P0123 1 F66 2 Ground Approx. 5
      P0227, P0228 2 F64 2

      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 2 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.
      CONTINUITY REFERENCE TABLE

      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0122, P0123 1 F66 4 F111 71 Existed
      P0227, P0228 2 F64 4 72
    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 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      CONTINUITY REFERENCE TABLE

      DTC Electric throttle control actuator ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0122, P0123 1 F66 3 F111 78 Existed
      P0227, P0228 2 F64 3 74
    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. Perform THROTTLE VALVE CLOSED POSITION LEARNING: SPECIAL REPAIR REQUIREMENT .

      INSPECTION END

  7. CHECK INTERMITTENT INCIDENT 

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

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