Diagnostic Strategy: Notes

WARNING: This page is about a different car, the 2005 Mercury Montego and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

Troubleshooting an electronically-controlled automatic transaxle 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 short cuts 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, have the following publications available:

Powertrain Control/Emissions Diagnosis (PC/ED) manual
Technical Service Bulletins (TSBs)
Wiring Diagrams

These publications provide the information required when diagnosing transaxle concerns.

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