Engine Controls - Basic Testing: Summary

If no faults were found while performing steps in this article, go to appropriate 4-Cylinder TESTS W/CODES - NON-TURBO or TESTS W/CODES - TURBO article. If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e. ROUGH IDLE, NO-START, etc.), or intermittent diagnostic procedures.