Engine Controls - Tests W/Codes: Introduction: Notes

Perform all steps in appropriate BASIC DIAGNOSTIC PROCEDURES article. If no faults are found while performing basic diagnostic procedures, proceed with self-diagnostics. If no hard failure DTCs are present, driveability symptoms exist or intermittent DTCs exist, proceed to TEST NS-SEL: NO START SELECTION MENU  , or appropriate TROUBLE SHOOTING - NO CODES article for diagnosis by symptom.