Engine Controls - Tests W/Codes - MOTRONIC 4.1 & 5.2 System: Introduction: Notes

NOTE: 2.3L vehicles are equipped with Motronic 4.1 system. 2.5L vehicles are equipped with Motronic 5.2 system.

If no faults were found while performing basic diagnostic procedures, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) are present after entering self-diagnostics, proceed to the TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).