The voltage regulation of the alternator’s output is handled by the PCM. So if the car’s charging system is malfunctioning now, and the problem is a lack of voltage regulation, that would require a new/different/working PCM to fix the problem.I was driving then my car started smoking from alternator they car died completely no power. Replaced the alternator and battery but alternator not charging battery my mechanic says it the CPU is that right? Please advise.
Having said that, I doubt your problem is a bad PCM. Ask your mechanic what happens after he replaces the PCM and the problem remains? In fact, tell him he gets no money for parts or labor until the problem is proven to be resolved.
He will be more reluctant to fire his parts cannon in that scenario, I would hope.