Engine Control Module: Description and Operation
PURPOSE AND OPERATIONThe Multiport fuel injection system is controlled by the 14 CUX 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.
The ECM having received data from the sensors produces injector pulses, the length of which will determine the simultaneous open time of each bank of injectors and will govern the amount of fuel injected.
The function of the system is to supply the exact amount of fuel directly into the intake manifold according to the prevailing engine operating conditions.
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.