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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 P2101: Electric Throttle Control Function >> 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 THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

    1. Check the voltage between ECM harness connector terminals.
      ECM Condition Voltage
      + -
      Connector Terminal Condition Terminal
      F78 8 E32 152 Ignition switch OFF Approx. 0 V
      Ignition switch ON Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 2  .

  2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between IPDM E/R harness connector and ECM harness connector.
      IPDM E/R ECM Continuity
      Connector Terminal Connector Terminal
      F19 57 F78 2 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

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

  3. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

    1. Check the continuity between IPDM E/R harness connector and ECM harness connector.
      IPDM E/R ECM Continuity
      Connector Terminal Connector Terminal
      F24 65 F78 8 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit.

    NO 

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

  4. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

    1. Turn ignition switch OFF.
    2. Disconnect electric throttle control actuator harness connector.
    3. Disconnect ECM harness connector.
    4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
      Electric throttle control actuator ECM Continuity
      Connector Terminal Connector Terminal
      F50 1 F78 1 Not existed
      3 Existed
      2 1 Existed
      3 Not existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace malfunctioning part.

  5. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

    1. Remove the intake air duct. Refer to REMOVAL AND INSTALLATION .
    2. Check if foreign matter is caught between the throttle valve and the housing.
      G08944710Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Remove the foreign matter and clean the electric throttle control actuator inside, refer to REMOVAL AND INSTALLATION , and then perform throttle valve closed position learning. Refer to DESCRIPTION .

  6. CHECK THROTTLE CONTROL MOTOR

    Check throttle control motor. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

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

  7. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

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

    NO 

    Repair or replace error-detected parts.

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