Engine Controls - Basic Testing: Summary

If no faults were found while performing BASIC TESTING , proceed to article TESTS W/CODES - DIESEL (for Diesel engines) or article TESTS W/CODES - GASOLINE (for Gas engines) or refer to article in TESTS W/CODES - TRANSMISSION in this section (if transmission codes are displayed). If no hard codes are found in self-diagnostics, or vehicle does not have a self-diagnostic system, proceed to TESTS W/O CODES article in this section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.