Diagnostic Procedure

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

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

OK or NG 

1. OK (with CONSULT-II): GO TO 2.
2. OK (without CONSULT-II): GO TO  3.
3. NG: Check accelerator pedal position sensor (throttle position sensor) circuit for engine control. Refer to "ACCELERATOR PEDAL POSITION 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".

   Voltage: 

   Fully-closed throttle: Approximately 0.5V 

   Fully-open throttle: Approximately 4V 

   Fig 1: CONSULT-II (Data Monitor Display)

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

OK or NG 

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

Without CONSULT-II 

1. Turn ignition switch to ON position. (Do not start engine.)
2. Check voltage between TCM harness connector M120 terminals 41 (P/L) and 42 (B) while accelerator pedal is depressed slowly.
   Fig 2: Checking Voltage Between TCM Harness Connector M120 Terminals 41 And 42

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

   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 accelerator pedal position sensor (throttle position sensor) circuit. (Main harness)

Perform Diagnostic Trouble Code (DTC) confirmation procedure, DTC U1000 CAN COMMUNICATION LINE .

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO 5.

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.