Engine Controls - Basic Diagnostic Procedures - Gas, Except 7.0L: Summary

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate TESTS W/CODES article. If no hard codes are found in TESTS W/CODES or if vehicle does not have a self-diagnostic system, proceed to appropriate TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.