Hi

Does anyone know what kind of scanner and/or programmer do I need to program/reprogram the BCM and battery control module of an H3 2007?

Thanks.

 

you have two computers. One is the ECU( engine control module) and a BCM(body control module) Which one are you trying to reprogram?? The BCM can only be programmed through the dealership. The ECU can be reprogrammed through PCMofNC.com. I have also heard there is a hand held out there, but the handheld ones can not be programmed for motor modifications

 

Actually, none of the above.

It is the battery control module, a.k.a. generator control module, a small module you may find attached to the negative battery cable. It controls battery charge from alternator.

Part number is/are 25826405 ; 15902094; 25816746

Hope this link works:

https://p4assets.zendesk.com/attachm...GDt7C1ofIRNdBw

 

that link does not work. take a pic and post it showing what you are talking about. I have not heard of such an item on any vehicle

 

Skeeter:

I disconnected the negative cable and put it in different positions, in order to have a better view of the module. As you can see, it is a 2 x 2.25 inch box attached to the negative battery cable. It is called "battery control module", or "generator control module".
Mine is just not working properly. When I start my h3, it goes to 15.50v and stay there for about 4 or 5 minutes; then it slowly goes down until it reaches 12.80v and stays there.
The module should regulate incoming voltage from alternator, and, when it works as it is expected, should keep voltage in a range from 13.5 (aprox.) to 14.5.

 

Another link:

BATTERY CABLES. Fits: H3 | Nalley Buick GMC Brunswick

In the diagram, it is # 14.

 

mine always goes to 15, then drops slowly as needed.
it varies on what is needed and how long you are running i think.
its def not an old fashioned volt regulator!

 

15 is ok, but anything above it is dangerous, specially if it goes on for several minutes.
Somebody told me that H3 have two (2) regulators: One inside the alternator itself, and then this "generator control module" that, in my case, is a pain in the neck.
If you know of any "scanner" or "programmer" I can buy to program it, please tell me.

 

I have not heard of one. It will probably have to be done at the dealership

 

A TECH2 may be able to reprogram it.

IF you know that the Generator Battery Control Module is the issue wouldn't replacement vs. reprogramming a faulty unit be the wise thing to do? I have only known these to "go bad" when someone tired jumping and reversed the cables (positive to negative).