Diagnostic Strategy: Notes

Troubleshooting an electronically controlled automatic transmission is simplified by using the proven method of diagnosis. One of the most important things to remember is that there is a definite procedure to follow.

NOTE: Do not take any shortcuts or assume that critical checks or adjustments have already been made.

Follow the procedures as written to avoid missing critical components or steps.

To correctly diagnose a concern, it may be necessary to view the following:

TROUBLE SHOOTING - NO CODES - EEC-V - GASOLINE & NGV article or SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.
TSBs.
Wiring Diagram.

These publications provide the necessary information when diagnosing transmission concerns.

Use the Diagnostic Flow Chart as a guide and follow the steps as indicated.