Engine Control Module

The Engine Control Module (ECM) is a hybrid design microprocessor based computer that is the main component of engine control system. Included in the tasks of the ECM is to control the cruise control system. The ECM processes switch inputs indicating that the vehicle driver has requested cruise control. At this point, the ECM regulates throttle angle and other factors to maintain a constant vehicle speed. The ECM also receives inputs directly from the cruise/brake switch, and the brake switch to deactivate cruise control, and return vehicle control to the driver.