2014+ GM BCM's Flashing

[grandprixlimited]

Has everyone been able to bench flash a 2014+ BCM, I've tried new, used and they all fail with SPS. I can read and flash them with the DC706 just not with SPS

[radrace19]

Has everyone been able to bench flash a 2014+ BCM, I've tried new, used and they all fail with SPS. I can read and flash them with the DC706 just not with SPS

You need to add a terminating resistor to the CAN wires if you are just flashing the BCM only on the bench.

[grandprixlimited]

My box has one built in and the pcm is connected too doesn't make a difference. I can read and flash it with the dc706 but SPS refuses to

[ironduke]

I'm guessing it fails at the end when it tries to write the vin and security but can probably write the OS and cal files ok?
I've bench programmed BCM's before on the bench without issue with sps and dps working out the fast flash fix and other things..

Is it successful if you program using SPS and the vin that is in the BCM? or does it block you since it's the same calibrations?

[grandprixlimited]

Doesn't even try, fails right off the bat, I can flash everything but 2014+ BCMs

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[ironduke]

Looks like that's from a 19 corvette.. I've done trucks, think the last one was a 2015, don't remember having issues like that, sorry. Looks like the error is the bcm is refusing the block transfer request but I don't know why..

[radrace19]

Step 2D seems like an odd place to error to me.

2d Err.jpg

[grandprixlimited]

It's a 2017 vette. Every 2014+ BCM does it, I've tried trucks, cars, suv's none of them will do it, all fail at the same place, My guess is sps is looking for a module that's not there

[radrace19]

No, I program them on the bench with no problems using SPS.
Do you have the 12v enable wired? I think it is on connector x2 and pin 4

[grandprixlimited]

no I used what customecm had for the pinout, I was wondering if that had anything to do with it. The pinout for this car shows x4-p23 Serial Data Communication Enable, I applied 12v to that pin and it still fails

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