Automatic Transmission Diagnostic Procedures: Introduction: Notes

The procedures contained in this article include all of the specifications, instructions, and graphics needed to diagnose NAG1 Electronic Automatic Transmission and Shift Lever Assembly problems. The diagnostics in this article are based on the failure condition or symptom being present at the time of diagnosis.

When repairs are required, Refer to the appropriate service information for the proper removal and repair procedure.

READ THIS ARTICLE BEFORE TRYING TO DIAGNOSE A VEHICLE TROUBLE CODE. 

Diagnostic procedures change every year. New diagnostic systems may be added and/or carryover systems may be enhanced. It is recommended that you review the entire article to become familiar with all new and changed diagnostic procedures.