I had a 2006 G6 with a 3.5 v-6 back in july that shorted a fuel injector and took out Ecm driver. I tried 3 used ecm's, 2 reman ecm's and 2 new oem units and was not able to flash any of these. Came back with severe error code E4399 , unable to retrieve data from ecm. I tried and used a Tech 2, a Mvci, and a new Mdi2 and could not reflash. AC Delco aftermarket tech support tried for 4 days to help, but finally told me to take to dealer. It was at dealer for 2 months, they tried a new ecm and couldn't do it either. Told customer vehicle should be scrapped. After to more reman ECM tries, it came back to me. This time I called OEM tech support, and after explaining situation, he agreed to help. After accessing my laptop and checking settings himself, he gave me a VCI number and we tried to reflash ecm through EBCM module, but again , aftermarket ECM seemed to be dead. I tried 1 more used from savage yard, used the VCI programming method and flashed though the ABS module, and it took first time. I never had 1 that I couldn't flash, but GM Sps Tech support will help and they got me straightened out. Customer again has a drivable vehicle again.
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Holy Sh@t, how does one recover from a Fiasco like that?
You programmed the ECM through the ABS module ? Isn't the ABS module that you successfully did the final one the same thing as doing it through EBCM you tried earlier?
Do you think by selecting a wrong module acronym for something like choosing SSDS (Same Sh@t Different Season )instead of SSSD (Same Sh@t Same Day), that is what might have made all the difference?
Last edited by Witsend; 12-19-2016, 05:05 PM. -
Now THAT is dedication and perseverance-!! Good work-!!
I'm wondering what may have been the ROOT CAUSE for all the failures-?? Several "used" modules (who knows....maybe good, maybe bad). Several "reman" modules (again who knows how well the "rebuilders" performed their duties). Several "new OEM" modules (were they truly "new" or their version of reman units). Some dealer parts people know the difference between a virgin OEM module and a core that was returned and refurbished.
Which "doner" vehicle did the final successful module come from-? Was it perhaps a better "match" for the vehicle being repaired-??
There has to be some reason for so many unsuccessful reflashing events.
I'm sure you're probably tired of this thing but perhaps upon reflection you may have some insight. Is there perhaps some aftermarket device connected to the vehicle-?? Is there perhaps some other module that had been previously "donated" confusing the local BUSS's. That year may have only the GM LAN or could also have a CAN buss as well-??
Great work-!!Comment
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Crusty, It was the OEM tech service man that said to try and program through the EBCM module. My understanding is that the VCI number attaches itself to ECM, that's how it is suppose to work. And you are right, the last donor ecm was from a o6 Pontiac G6 with a 3.5 , but VIN was different, and that doesn't explain OEM originals that wouldn't work either. If I hadn't called Techline Customer Support Center and talked a man that actually wanted to help, this vehicle would still not be fixed.Comment
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One more thing I never mentioned, but when I was originally working on car, trying to reflash, when I couldn't reflash any used or reman unit, or OEM either, I was able to install original ECM and update it to latest calibration, but could not talk to any others. Programming is accomplished though BCM, where it has both GM LAN and CAN lines. The OEM replacement ECM's were of a new part number, so they weren't the original part number. Maybe there was a wrong part info supplied by GM, I'll never know because I'm not trying anything else. It is working and okay for me.Comment
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I hear you. It's working....don't borrow trouble-!! LOL
I have heard some rumblings about disconnecting the brake control module on some GMs before flashing, so in a "polish logic" way of thinking, what the GM service person said may make sense....
Sometimes there are some methods that wouldn't normally make sense due to software conflicts and the way software is written but we'll never be told about those differences.
It's a good thing to use an ECM from a vehicle that was the same Y/M/M. Changing the VIN may have been the only thing that was necessary (and the flash file was able to handle that quite simply).
From what I have read, the brake control module doesn't have both the GM LAN and CAN..(???)..... This vehicle being a relatively early GM CAN system (CAN has been around in prior model years in other makes), perhaps how they configured CAN back then wasn't optimal.
Personally, the entire industry needs to create some common standards for software integration but as it is right now, it's a free-for-all....just like a good mix up in a hockey game or a Lacrosse game....or a good bar fight-!!
Thanks for your information and if you wake up in the middle of the night with a "flash" revelation (pun intended) please let us know. Thanks.Comment
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Regarding the different GM part number, sometimes I find a really good dealer parts person who will look into previous part number change-ups and find that a previous part number (which may be more compatible) is still available. Not just GM dealers either. A good parts person who will put some effort into it is worth their weight in gold, but they are rare.Comment
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