Engine Controls - Tests W/Codes - MOTRONIC 4.1L & 5.2L System: Summary

If no hard DTCs are present, proceed to BASIC TESTING , proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) are present after entering self-diagnostics, go to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.