Diagnostic Starting Point
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix, 2002 Chevrolet Malibu, and 2002 Buick Century. 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 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 diagnostic trouble codes (DTCs) and the codes' statuses