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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1550 To P2A03 >> DTC P2118: Throttle Control Motor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Disconnect electric throttle control actuator harness connector.
    2. Disconnect ECM harness connector.
    3. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      Electric throttle control actuator ECM Continuity
      Connector Terminal Connector terminal
      F66 5 F110 57 Not existed
      63 Existed
      6 57 Existed
      63 Not existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace malfunctioning part.

  2. CHECK THROTTLE CONTROL MOTOR

    Refer to "COMPONENT INSPECTION (ELECTRIC THROTTLE CONTROL MOTOR) ".

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: GO TO  4.

  3. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair or replace harness or connectors.

  4. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

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

    : INSPECTION END

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