Diagnostic Strategy

Diagnostic Strategy

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

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

To diagnose a concern correctly, the technician should have the following available:
^ Transmission Reference.
^ Technical Service Bulletins (TSBs).
^ Wiring Diagram.

These provide the information required when diagnosing transmission concerns.

Using the Diagnostic Flow chart as a guide, follow the steps as indicated. Diagnostic Flow Chart