can you put a pcm out of an identical grand cherokee and have it work in another?

Asked by May 18, 2018 at 09:02 PM about the 1998 Jeep Grand Cherokee

Question type: Maintenance & Repair

powertrain control module swap in identical vehicles

7 Answers

12,750

You should not need to ever replace a PCM unless you put it under water. Diagnose your vehicle or have someone that knows cars do it.

2 people found this helpful.
170,145

I think you would need a reflash.

1 people found this helpful.
144,695

The numbers have to match that are on the part itself.

2 people found this helpful.
Best Answer Mark helpful

thanks for the help,i did have the pcm diagnosed as the probable problem. I dont see why one mechanic would find it hard to believe that a 20 year old computer would malfunction. In my experience, anything can break.

144,695

They do fail, but usually there is something that caused it, over or under voltage is a biggie, then there are those that just plain fail, who knows the reason. Thanks for the points.

10

If you put the battery terminals on wrong it will fry the pcm

1 people found this helpful.
10

If you replace the pcm, key barrel, immobiliser (5wk4 812c) that have all come from the same car then you shouldn't have to reprogramme the new pcm. Note that the new pcm will be coded to old car therefore it will have the old cars VIN number stored in it.

1 people found this helpful.

Your Answer:

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