Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. 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 ", "DIAGNOSTIC PROCEDURE WITHOUT CONSULT-III ".

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-III
1. Turn ignition switch ON.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-III.
3. Depress accelerator pedal and read out the value of "ACCELE POSI".
4. Select "SELF-DIAG RESULTS" mode for "A/T" with CONSULT-III. Refer to "SELF-DIAGNOSTIC RESULT MODE "
OK or NG

OK: GO TO 4.

NG: GO TO 3.
CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch ON.
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-III. Refer to "CONSULT-III FUNCTION (ENGINE) " (for VQ35DE engine), "CONSULT-III FUNCTION (ENGINE) " (for VK45DE engine).
OK or NG

OK: GO TO 4.

NG: Check the DTC detected item. Refer to "CONSULT-III FUNCTION (ENGINE) " (for VQ35DE engine), "CONSULT-III FUNCTION (ENGINE) " (for VK45DE engine).
- If CAN communication line is detected, go to "DTC U1000 CAN COMMUNICATION LINE ".
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 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.