Programming PCM

RAY3720

MEMBER
2006 DODGE CHARGER
3.5L
V6
2WD
AUTOMATIC
200,000 MILES

I got a used PCM and when it didn't work. I plugged my original unit back in and now it will not crank over. Is there a certain process to re program my factory unit?

Tuesday, January 7th, 2020 AT 2:48 PM

4 Replies

KASEKENNY

MECHANIC
18,907 POSTS

More than likely you have to program the wireless control module to the PCM now. When you plug in a PCM that is already programmed it will tell the VIN to the other modules. This will confuse things and when you installed the old PCM it is no longer "sync" with the WCM.

If you are able to scan for codes that should tell us what the issue is. There could be other issues but the codes will tell us for sure.

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Tuesday, January 7th, 2020 AT 6:33 PM

RAY3720

MEMBER
5 POSTS

Unfortunately the battery was disconnected when I swapped the old back in and code reader wasn't picking up anything. Should I maybe try a hard reset?

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Tuesday, January 7th, 2020 AT 9:58 PM

RAY3720

MEMBER
5 POSTS

How do I go about reprogramming it?

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Wednesday, January 8th, 2020 AT 7:33 AM

KASEKENNY

MECHANIC
18,907 POSTS

You have to hook up the scan tool capable of doing this and follow the procedure from the tool to program it. Basically you run the PCM replacement function. If all you did was plug in the other one then I suspect the VIN mismatch is the issue.

You may have to replace it with a new one at this point. Unfortunately you cannot swap PCMs on these vehicles. They store the back up info for the security system and if that doesn't match, it locks them out.

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