Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Xterra. 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. Turn ignition switch ON. (Do not start engine.)
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Depress accelerator pedal and read out the value of "ACCELE POSI".
4. Select "SELF-DIAG RESULTS" mode for "A/T" with CONSULT-II. Refer to "SELF-DIAGNOSTIC RESULT MODE ".
OK or NG

OK: GO TO 4.

NG: GO TO 3.

Fig 1: CONSULT II Display - Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DTC WITH ECM
with CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-II. Refer to "CONSULT-II FUNCTION (ENGINE) ".
OK or NG

OK: GO TO 4.

NG: Check the DTC detected item. Refer to "CONSULT-II FUNCTION (ENGINE) ".
- If CAN communication line is detected, go to "DTC U1000 CAN COMMUNICATION LINE ".
Fig 2: CONSULT-II Display - SELF-DIAG RESULTS Mode For ENGINE
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DTC
Perform "DTC Confirmation Procedure".
- Refer to "DTC CONFIRMATION PROCEDURE ".
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 5.
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 6.

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.