Engine Performance: System: Self-Diagnostics: Summary

If no Diagnostic Trouble Codes (DTCs) are present and a no start condition exists, proceed to 1989 BASIC DIAGNOSTIC PROCEDURES -- ALLANTE article. If no DTCs are present and a driveability condition exists, proceed to 1989 TROUBLE SHOOTING - NO CODES -- ALLANTE article for diagnosis by symptom (i.e., ROUGH IDLE, ENGINE STALLS, etc.).