NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram Refer to Section 8W

Perform the following pre-diagnostic troubleshooting procedures prior to performing any diagnostic test.

NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary.

Always perform diagnostics with a fully charged battery to avoid false symptoms.



NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, it is recommended to record any available data to assist in duplicating the conditions in which the DTC originally set.






Check for any Service Information Tune-ups or Service Bulletins that may apply.


Did any of the above procedures repair the vehicle?

Yes


No