Circuit Description
WARNING: This page is about a different car, the 2002 Pontiac Grand Am and 2002 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
The engine controls diagnostic system check is an organized approach to identifying a problem created by an electronic engine control system malfunction. Engine controls diagnostic system check is starting point for any driveability complaint diagnosis. This directs service technician to next logical step to diagnose complaint. Understanding procedure and using it correctly will reduce diagnostic time, and will prevent replacement of good parts.