Nissan Maxima Service and Repair Manual: P2118 throttle control motor

Description

The throttle control motor is operated by the ECM and it opens and closes the throttle valve.

The current opening angle of the throttle valve is detected by the throttle position sensor. The throttle position sensor it provides feedback to the ECM, when opens/closes the throttle valve in response to driving conditions via the throttle control motor.

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON and wait at least 2 seconds.
  2. Start engine and let it idle for 5 seconds.
  3. Check DTC.

Diagnosis Procedure

1.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF.
  2. Check ground connection E9.

2.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.
  4. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

3.CHECK THROTTLE CONTROL MOTOR

4.CHECK INTERMITTENT INCIDENT

5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

  1. Replace electric throttle control actuator.

Component Inspection

1.CHECK THROTTLE CONTROL MOTOR

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR

  1. Turn ignition switch OFF.
  2. Disconnect electric throttle control actuator harness connector.
  3. Check resistance between electric throttle control actuator terminals as per the following.

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

  1. Replace electric throttle control actuator

Special Repair Requirement

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

2.PERFORM IDLE AIR VOLUME LEARNING

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