Let’s go over what these acronyms stand for, and what they do! History of Vehicle Engine Managementīefore we get into what all those acronyms stand for, let’s look at the history of engine management. It can be confusing to decode these terms and understand what they mean and ultimately, know what’s wrong with your car. Your vehicle contains many control modules, but when it comes to the engine and drivetrain there are three common types the ECM, TCM, and PCM. Control modules monitor and dictate different values, allowing the car to run correctly. Computer modules control nearly all mechanical parts of modern vehicles (engine, drivetrain, transmission, etc.). Your vehicle is a complex array of mechanical and electrical components working together while you drive.
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