Engine Controls - Basic Testing 1.6 & 1.8L: Summary

If no faults were found while performing basic diagnostic procedures, perform self-diagnostic steps in the TESTS W/CODES article. If no hard codes are found in self-diagnostics, go to the TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, HARD START, HESITATION, etc.) or intermittent diagnostic procedures.