Oops sorry you are correct. My main point was that a PCM was not dodge specific and that is how I had always remembered the difference as most PCM's are flashable by the dealer at the very least.

 

No problems. I have no facts backing up whether PCM is strictly Chrysler, although I do notice nothing mentioned about PCM on any Frod or Chevrolet (intentional mis spelling).

I work on so many Chevys, Frods and Dodges I always wind up using the wrong acronym but generally does the same thing.

 

It does the same thing I agree, but my Ford and Chev manuals decipher it as ECM, where my Dodge manuals state it as PCM. So us here in the Mopar world call it what the Manual states and that is the lingo Mopar uses.


I too have no facts to back up PCM is Chrysler specific, however:

If you want to get technical, years ago, engine computers were usually physically different modules than transmission computers, so the term PCM refers to the whole powertrain computer (engine + transmission/etc) while ECU and ECM refers to just the engine computer. Transmission modules are usually called TCUs (transmission control units) and TCMs (transmission control modules). But these days, most modern cars I know of use one module to control the whole powertrain (PCMs) but some people still call them ECUs and ECMs.

 

What does "CTM" stand for? I see this acronym often on this sight.

 

central timer module, it controls most of the interior electronics and control signals from most switches