Diagnostic Procedure

• Check P code with CONSULT-II "ENGINE".

  Turn ignition switch ON and select "SELF DIAGNOSTIC RESULTS" mode for "ENGINE" with CONSULT-II.

Refer to RETRIEVING DIAGNOSTIC TROUBLE CODES .

OK or NG 

1. OK (with CONSULT-II): GO TO 2.
2. NG: Check accelerator pedal position (APP) sensor circuit for engine control. Refer to DTC P0122 OR DTC P0123: THROTTLE POSITION SENSOR and DTC P2122 OR DTC P2123: APP SENSOR . If CAN communication line is detected, GO TO "DTC U1000 CAN COMMUNICATION LINE ".

With CONSULT-II 

1. Turn ignition switch to ON position.

   (Do not start engine.)

2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Read out the value of "THRTL POS SEN".

   Voltage: 

   Fully-closed throttle :Approximately 0.5V 

   Fully-Open throttle :Approximately 4V 

OK or NG 

1. OK: GO TO  4.
2. NG: Check harness for short or open between ECM and TCM regarding throttle position sensor circuit. (Main harness)

Fig 1: Consult-II Data Monitor Screen

Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II 

1. Turn ignition switch to ON position. (Do not start engine.)
2. Check voltage between TCM terminals 41 (W) and 42 (B) while accelerator pedal is depressed slowly.

   Voltage: 

   Fully-closed throttle valve :Approximately 0.5V 

   Fully-open throttle valve :Approximately 4V 

   (Voltage rises gradually in response to throttle position.) 

OK or NG 

1. OK: GO TO 4.
2. NG: Check harness for short or open between ECM and TCM regarding throttle position sensor circuit. (Main harness)

Fig 2: Checking Voltage Between TCM Terminals 41 (W) And 42 (B)

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG 

1. OK: INSPECTION END 
2. NG: Repair or replace damaged parts.