Diagnostic System Check - Engine Controls: Description
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.
The Diagnostic System Check - Engine Controls is an organized approach to identifying a condition that is created by a malfunction in the engine control system. The diagnostic system check must be the starting point for any driveability concern. The diagnostic system check directs the service technician to the next logical step to diagnose the concern. Understanding and correctly using the diagnostic procedure reduces diagnostic time and prevents replacement of good parts.