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Discussion starter · #21 ·
Yes. Some of the parts that require programming, per GM, can only be programmed once. EBCM, ECU, TCU, etc. And unless you know someone who has the SPS software, Chevy dealers will NOT program a used part anyway. Thanks for the suggestion none the less.
 
Discussion starter · #23 ·
For what it's worth, here's a screen shot of all three part numbers. All discontinued and all unavailable.
Image


As an aside, the brake valve assembly seems to be functioning just fine without the EBCM. Push through mode is working great for now. It's drivable, and actually not bad in conjunction with regen.
I tried a panic stop, and while a bit difficult (pedal travel and pressure), was still able to stop quickly.

Still hunting for a new part hiding on a shelf somewhere in the universe.

FYI, for a different thread, for those hunting for the drive battery.

 
wyolincoln_1102 thanks for sharing your progress. Frustrating regarding sourcing a rebuild option.
I have been trying to discover more on the VIN flash programing requirement on components. Still early days.
I have confirmed that many of the components do need to be flashed. It appears that many independent garages (vs the dealer route) have the scan and program tools.
I have yet to get a definitive answer to what exactly is being flashed (ie., VIN) and if used components, like an ebcm, can be flashed to work in another vehicle.
 
Discussion starter · #27 · (Edited)
When I spoke with GM directly, they said the EBCM was a "write once" component.
Local shop here said it can't even be nulled out once it's written to. I suppose one should not make a mistake when programming, eh?

Since it's not security related, makes you wonder why. Seems a bit greedy and short sighted to manufacture one off parts like that. Shakes my life long loyalty to GM products for sure.
 
Assuming a used module with a VIN mismatch was installed - - would it fail to work or merely throw an error code and warning light? If it functioned OK it would buy some time to further investigate the possibility of flashing the VIN or reapiring the original. Might br worth a try . . . .
 
Discussion starter · #29 ·
The used EBCM wouldn't function anyway because you wouldn't be able to get through the programming and relearning stages. Somewhere on this forum, someone tried programming a used part without success, but their valve assembly was bad, not the EBCM. They never could get past the programming steps until they reinstalled their original EBCM.

I see where you were going, though. Good idea.
 
Assuming the vin is encoded only on the memory chip in the module, perhaps using an electronics company which has surface mount board design services can desolder it and swap it to your junkyard module find?

If we can document where this data is stored on each module, it’s worth a try. Hopefully they don’t have any more encryption/etc in place.
 
Currently in the same situation. My Gen 1 car only has 81K in excellent condition otherwise.
Being a Honda motorcycle tech I was proud of owning the Volt until a month ago with ebcm failure (pulsating brake) sitting at the dealer as they're unable to source the part. GM has tied up with a 3rd party that supposed to supply reconditioned module however they're out of stock as well.

The GM tech told me that NAPA auto has the part but the dealer will not guarantee if it will work or not.

I filed a BBB claim asking Chevy to either supply the part or buyback the vehicle, they came back and essentially showed me the middle finger.
 
The used EBCM wouldn't function anyway because you wouldn't be able to get through the programming and relearning stages. Somewhere on this forum, someone tried programming a used part without success, but their valve assembly was bad, not the EBCM. They never could get past the programming steps until they reinstalled their original EBCM.

I see where you were going, though. Good idea.
Were you able to fix your EBCM?

After reading your thread last month, I reached out to someone who reprograms GM modules.
My request:
"Hi. A 2013 Chevy Volt needs a new EBCM, per dealer. P/N discontinued, a new replacement can't be found. Thinking about re-VINing a used one. Can you help?"
His reply:
"Yes I can help"
"Some responses on thatt forum are incorrect, ebcm does have security on it and is part of the immobilizer system."

Let me know if you need his contact.
 
An interesting subject.
I have found my dealer is only interested in programming new modules.
It is my understanding that old/repurposed modules can be re-programmed.
But there is a cost to have someone else do it.
So...I have been doing some reconnaissance into programming modules.
In my case it would be to program/re-program the Long Range Radar Sensor | Cruise Control Distance Sensor and get rid of the ACC message.
I have been reading that VXDIAG (VXDIAG VCX NANO GM GDS2) can initialize/program/re-program many volt modules (there might be some exceptions).
I read people using VXDIAG use a 'disposable' old laptop with WIN7 as the software could very well be of dubious pedigree.
The cost is approximately u$100 on amazon, plus the cost of an old laptop.
Maybe this is a workaround many have been looking for?
-
IF ANYONE IS IS SUCCESSFUL USING VXDIAG I WOULD LOVE TO KNOW PROs & CONs
 
Discussion starter · #40 ·
So, by sheer luck, I found a new EBCM on eBay. Don't ask. I didn't. I live in Florida.
I had it installed, it took the VIN number just fine, and the bleed process worked great, but the dude doing the programming cannot get past a certain point. He said there is some negative value showing up and the programming halts there. They bled the system twice and end up with the same result.
I'm hearing this through an intermediary. Car has been with programming dude for three weeks.

Anyone ever heard anything even close to this negative value thing? I'm going to try and talk directly with this guy next week. Try to get more details on exactly what he's doing and how.

Needless to say, this Volt is for sale.
 
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