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 MALFUNCTION INDICATOR LAMP (MIL) ".

OK or NG 

1. OK (with CONSULT-II): GO TO 2.
2. OK (without CONSULT-II): GO TO  3.
3. NG: Check throttle position sensor [accelerator pedal position (APP) sensor] circuit for engine control. Refer to DTC P0122, P0123: TP SENSOR and DTC P2122, P2123: APP SENSOR .

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".

Fig 1: Checking Input Signal (With Consult-II)

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

1. Voltage: 
2. Fully-closed throttle: Approximately 0.5V 
3. 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 [accelerator pedal position (APP) sensor] circuit. (Main harness)

Without CONSULT-II 

1. Turn ignition switch to ON position. (Do not start engine.)
2. Check voltage between TCM terminals 41 (GY) and 42 (B/W) while accelerator pedal is depressed slowly.
   Fig 2: Checking Input Signal (Without Consult-II)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Voltage: 
   2. Fully-closed throttle valve: Approximately 0.5V 
   3. Fully-open throttle valve: Approximately 4V 
   4. (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 [accelerator pedal position (APP) sensor] circuit. (Main harness)

1. Perform TCM input/output signal inspection. See INPUT/OUTPUT SIGNAL OF TCM .
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.