Diagnostic Starting Point - Engine Controls

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

Begin the system diagnosis with Diagnostic System Check - Engine Controls. The Diagnostic System Check - Engine Controls will provide the following information:

The identification of control modules which command the system.
The ability of control modules to communicate through serial data circuit.
The identification of any stored Diagnostic Trouble Codes (DTCs) and the codes statuses.

The use of the Diagnostic System Check - Engine Controls will identify the correct procedure for diagnosing the system and where the procedure is located. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS .