What does the PCM stand for, and what does it control?
Yes, they do have updates to the PCM every once in awhile. The only way to find out is to go the dealer and have it put on the computer, it will tell them if a new version is available for your car.
more like the heart. the PCM really only controls the engine and sometimes the trans (like in my car). the brain would be the TIPM (totally integrated power module). the TIPM is the module that controls all other modules.A powertrain control module (PCM) is the "brains" of your car...