Nissan Maxima Service and Repair Manual: P2101 electric throttle control function

Description

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.

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 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

NOTE:

  • If DTC P2101 is displayed with DTC P2100, first perform the trouble diagnosis for DTC P2100. Refer to EC-456, "DTC Logic".
  • If DTC P2101 is displayed with DTC 2119, first perform the trouble diagnosis for DTC P2119. Refer to EC-465, "DTC 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.

TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V when engine is running.

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 RELAY INPUT SIGNAL CIRCUIT-I

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

  1. Check the voltage between ECM harness connectors.

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

3.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

  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.
  5. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

4.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

  1. Check the continuity between IPDM E/R harness connector and ECM harness connector.
  2. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

5.CHECK FUSE

  1. Disconnect 15 A fuse (No. 43) from IPDM E/R.
  2. Check if 15 A fuse is blown.

6.CHECK INTERMITTENT INCIDENT

7.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.
  5. Also check harness for short to ground and short to power.

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

8.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

  1. Remove the intake air duct. Refer to EM-24, "Removal and Installation".
  2. Check if foreign matter is caught between the throttle valve (1) and the housing.

Nissan Maxima. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

2: Electric throttle control actuator
: Vehicle front

9.CHECK THROTTLE CONTROL MOTOR

10.CHECK INTERMITTENT INCIDENT

11.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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