Circuit Description
WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
The Diagnostic System Check is an organized approach to identifying a condition created by an electronic engine control system malfunction. The Diagnostic System Check is the starting point for any driveability diagnosis. This directs the service technician to the next logical step in order to diagnose the condition. Understanding the table and using it correctly will reduce diagnostic time, and will prevent the replacement of good parts.