Automatic Transmission Diagnostic Procedures: Introduction: Notes

The following procedures include all of the specifications, instructions, and graphics needed to diagnose 42RLE Electronic Automatic Transmission (EATX) 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 procedures for the proper removal and repair procedure.

Diagnostic procedures change every year. New diagnostic systems may be added and/or carryover systems may be enhanced. READ THIS BEFORE TRYING TO DIAGNOSE A VEHICLE TROUBLE CODE. It is recommended that you review the entire article to become familiar with all new and changed diagnostic procedures.