System Overview

NOTE: Electronic Control Module (ECM) may also be referred to as the Motronic control module or simply control module.

Motronic engine management system uses an Electronic Control Module (ECM). On 9000 series, ECM is located under left side of instrument panel. If any monitored malfunction is detected by the ECM, the Malfunction Indicator Light (MIL) will display CHECK ENGINE on the instrument cluster and a Diagnostic Trouble Code (DTC) may be stored in the ECM memory. The MIL may also be referred to as the CHECK ENGINE light. DTCs can be retrieved or erased using a scan tool connected to Data Link Connector (DLC). See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCs)