Diagnostic System Check - Engine Controls (Alternative Fuels): Description

The Diagnostic System Check - Engine Controls (Alternative Fuels) 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 test procedure reduces diagnostic time and prevents the replacement of good parts.