Diagnostic Strategy: Notes

WARNING: This page is about a different car, the 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

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 information available:

Technical Service Bulletins (TSBs).
Wiring Diagram.

These articles provide the information required when diagnosing transmission concerns.

Using the Diagnostic Flowchart as a guide, follow the steps as indicated.