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Username Post: BCM swap 2015 Express        (Topic#360223)
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2933
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-20-20 07:50 PM - Post#2789086    

Hi All.
I swapped the BCM in a 2015 Chevrolet Express.
Everything works good but I cannot get the airbag light to go out.
It has to do with the code in the SDM not matching the code in the BCM.
Does anyone know if the number can be reset without replacing or resetting the SDM?
And if not does anyone know who could possibly reset the SDM.
It only has 1 airbag in the steering wheel as it is a cutaway.
Thanks all

Old School GM fan FOREVER


 
Shepherd 
Frequent Contributor
Posts: 2089

Loc: Lake George, NY
Reg: 11-11-15
03-21-20 05:57 AM - Post#2789101    
    In response to rockfangd

Have you scanned the sirs system to see if there is a code? Could be wrong but I believe the bcm does not control the sirs. Should have lots of time as we are basically locked down, can't even get a take out breakfast here.



 
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2933
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-21-20 08:59 AM - Post#2789125    
    In response to Shepherd

So the SDM and BCM are paired to each other.
If you swap either with a used one it will conflict.
The code is caused by the confliction.
I need to be able to reset one of the modules so it will learn the code from the other module.


Old School GM fan FOREVER


 
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2933
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
03-30-20 01:23 PM - Post#2789821    
    In response to rockfangd

Ok so this morning I swapped the donor bcm back in so I could post the code.
It is the one and only problem with the swap.
The code simply states no communication with the Airbag module.
There is no communication because the primary key sent by the airbag module does not match the one in the Donor bcm.
The code from my Airbag module is 8065.

Old School GM fan FOREVER


 
65_Impala 
Very Senior Member
Posts: 4494

Reg: 12-29-02
03-30-20 06:52 PM - Post#2789851    
    In response to rockfangd

They do get matched but i don't know how with a used module. i know the new ones pair themselves but I've read it's a 1-time thing.



 
rockfangd 
"7th Year" Gold Supporting Member
Posts: 2933
rockfangd
Age: 34
Loc: Utica ny
Reg: 04-13-10
06-26-20 06:55 PM - Post#2797269    
    In response to 65_Impala

Just an update here.
I am not sure why people even sell used modules.
There is no way I can find to repair them.
I am working on something at the moment but am not having luck.
Dealers want nothing to do with it.

Old School GM fan FOREVER


 
65_Impala 
Very Senior Member
Posts: 4494

Reg: 12-29-02
07-12-20 07:55 AM - Post#2798515    
    In response to rockfangd

I wonder if a TechII could be used to reflash the module and then it would pair again. I think there are some shops selling/refurbishing modules for exchange purposes and they must get them reset.

But yes, simply selling used modules is rather dumb.



 
Matt 
Member #2440
Posts: 7830
Matt
Loc: SAV
Reg: 09-26-01
07-15-20 08:18 AM - Post#2798790    
    In response to 65_Impala

Does airbag still work?

Black electrical tape on the abs light as a low cost solution?



 
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