Diagnostic Strategy: Notes

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. 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 publications available:

Transmission reference manual.
INTRODUCTION article in ENGINE PERFORMANCE.
OASIS messages.
Technical Service Bulletins (TSBs).
Wiring Diagram.

These publications provide the information required when diagnosing transmission concerns.

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