ECM General Information

The PGM-FI Control (ECM) Unit in this vehicle is a dedicated microcomputer which controls virtually all engine functions. Based on information received from the inputs, the ECM determines the current demands being placed on the engine. Once this is known, the ECM, based on the program contained in permanent memory, uses the ECM outputs to tailor engine performance to more efficiently meet those demands. A generalized list of the different control functions and the pertinent inputs and the outputs that control them are as follows: