Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-III. Refer to "SELF-DIAG RESULTS MODE ".
OK or NG

OK: GO TO 2.

NG: Check the DTC detected item. Refer to "SELF-DIAG RESULTS MODE ".
CHECK DTC WITH TCM
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III. Refer to "SELF-DIAGNOSTIC RESULT MODE ".
OK or NG

OK: GO TO 3.

NG: Check the DTC detected item. Refer to "SELF-DIAGNOSTIC RESULT MODE ".
- If DTC of CAN communication line is detected, go to "DTC U1000 CAN COMMUNICATION LINE ".

CHECK INPUT SIGNALS

With CONSULT-III

Start engine.
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
While monitoring "ENG SPEED SIG", check for engine speed change corresponding to "ACC PEDAL OPEN".

INPUT SIGNALS

Item name	Condition	Display value
ENG SPEED SIG	Engine running	Closely matches the tachometer reading.
ACC PEDAL OPEN	Released accelerator pedal - Fully depressed accelerator pedal	0.0/8 - 8.0/8

OK or NG

OK: GO TO 4.

NG: Check 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 5.
CHECK TCM
1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG

OK: INSPECTION END

NG: Repair or replace damaged parts.