LB7 ECM Read issues

[Cougar281]

I picked up an LB7 ECM and attempted to read it. First time it took a try or two, and when it finally went to read the ECM, I got:

"EFILive has detected that this ECM may not have a valid calibration."

It then read it and appeared to bring up a good calibration.

Now it started giving me:

18:11:08.572: ECM not secured
18:11:08.576: Initializing ECM...
18:11:09.303: Initializing ECM, step 1 of 4
18:11:09.306: Initializing ECM, step 2 of 4
18:11:10.040: Initializing ECM, step 3 of 4
18:11:11.465: Initializing ECM, step 4 of 4
18:11:11.731: ECM lock has been re-armed, attempting to unlock ECM again...

18:11:11.884: Initializing bootloader...
18:11:11.951: Error: Failed. Controller has returned to normal operation, please retry the operation.
18:11:12.158: Initializing bootloader, step 1 of 3
18:11:12.160: Error
18:11:12.162: Disconnecting ...

As near as I can tell from this (http://dieselplace.com/forum/showthread.php?p=1616233) post by Ross, the ECM's S/N, seed/key and VIN are wiped (although when I get the calibration info from the tune tool, it displays VIN, OS and segment info, but no S/N, CALID, hardware # or BCC). Any chance of some kind of CPR since it still displays the VIN and OS, or is it done?

[Blacky]

Locate the \My Documents\EFILive\V7.5\Bug Reports\Upload_YYYYMMDD_HHMMSS.blx file and send it to me at paul@efilive.com. Include a link to this thread so I know what its about.

Note:
YYYYMMDD is the year, month and day
HHMMSS is the hour, minute and second that you attempted to read the ECM.

Regards
Paul

[Cougar281]

E-Mail sent... Although I forgot to reference this thread :doh2:

[Blacky]

Got the email. Not good news though :(
Paul

[Jared Duramax]

Yup fried ECM from what i can tell from here. the same thing happened to me twice the first time i had to replace the ECM the 2nd time i was able to do a full system reflash and get it to work again.

[Cougar281]

Sent that ECM back and got another ordered... Can an 03 or 04 LB7 OS be loaded into an 01 ECM?

[Jared Duramax]

No it must have the same OS as the original one

[GMPX]

Actually, it can be done without killing the ECM (which TechII will do), but, I am not 100% sure that the other modules in the vehicle will like it.
I remember this being discussed on DP a while ago and a few people did it no problem.

Cheers,
Ross

[Trippin]

Late OS into early ECM seems to be happy.

Early OS into late ECM, not so much. :frown:

[Cougar281]

The reason I'd want to load a new OS is I have an 01 ECM, but if someone had say an 03 or 04 LB7 and I was going to let them try a tune or something, best bet would be to flash their OS into my ECM, modify it and let them run that instead of trying to run with the 01 OS in their 03 or 04 truck.


Actually, it can be done without killing the ECM (which TechII will do), but, I am not 100% sure that the other modules in the vehicle will like it.
I remember this being discussed on DP a while ago and a few people did it no problem.

Cheers,
Ross

[GMC-2002-Dmax]

The reason I'd want to load a new OS is I have an 01 ECM, but if someone had say an 03 or 04 LB7 and I was going to let them try a tune or something, best bet would be to flash their OS into my ECM, modify it and let them run that instead of trying to run with the 01 OS in their 03 or 04 truck.

I have full flashed many, many 2001 ECM's with either 2002-2004 OS without any issue.

I will not attempt reverting to a 2001 OS even with a 2001 ECM once the original OS is overwritten.

All of my 2001 customers run a 2002 OS and the computers are from 2001-2004 and nobody has issues.

Tony

[Compcowboy]

What caused the fried ECM? I am getting the same readings on the 01 lb7 I am trying to read. I will try to pull the file