Engine Control Module: Description and Operation
PURPOSE AND OPERATIONThe Multiport fuel injection system is controlled by the Engine Control Module (ECM) comprising of a microprocessor with integrated circuits and components mounted on printed circuit boards. The ECM is connected to the main harness by a 40 pin plug.
The ECM is the heart of the vehicle's fuel delivery system. It monitors information from several inputs to determine the fuel delivery strategy required to produce efficient operation. As the sophistication of the fuel injection system increases, the amount of information processed by the ECM also increases.
Additional strategies to cover fueling requirements for situations such as cold starting, hot starting, and wide-open throttle acceleration may also be added to the ECM software.