Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to , "SELF-DIAGNOSTIC RESULT MODE "

Is a malfunction in the CAN communication indicated in the results?

YES : Check CAN communication line. Refer to , "DTC U1000 CAN COMMUNICATION LINE "

NO : GO TO 2.
CHECK DTC WITH TCM
With CONSULT-II
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
  
  Fig 1: CONSULT-II Display - Data Monitor
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 3.

NG : Check the ignition signal circuit.
- Refer to "IGNITION SIGNAL "
CHECK DTC
Perform "DTC confirmation procedure".
- Refer to , "DTC CONFIRMATION PROCEDURE "
OK or NG

OK : INSPECTION END

NG : GO TO 4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to , "MAIN POWER SUPPLY AND GROUND CIRCUIT "

OK or NG

OK : GO TO 5.

NG : Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following.
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG

OK : Replace the control valve with TCM. Refer to , "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 "

NG : Repair or replace damaged parts.