Diagnostic Starting Point - Doors

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

For power mirror systems without the A43 memory feature, begin the diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - DOORS in order to identify the correct procedure for diagnosing the system and where the procedure is located.

For power mirror systems with the A43 memory feature and all other door systems, begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK - DOOR SYSTEMS . The Diagnostic System Check will provide the following information:

The identification of the control modules which command the system.
The ability of the control modules to communicate through the serial data circuit.
The identification of any stored DTCs and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.