Electronic Control Module: Notes

The Electronic Control Module (ECM) is located in the passenger compartment, behind glove box. It constantly monitors the information from various sensors to control the EGR, TCC, cold advance, and glow plug systems. The ECM processes input signals from sensors and then sends the necessary electrical responses to control these systems.

The ECM performs the diagnostic function of the DEC system. It can recognize operational problems, alert driver through the "SERVICE ENGINE SOON" light, and store code(s) which identify problem areas to aid technicians in making system repairs.