LBZ: ECM Loss Communication

[Duramax 6.6L]

While flashing a 2007 Silverado Classic with a LBZ, EFILive lost communicating with the ECM half way through the programming.

Now I am getting the error message of no data received. It is as though the ECM is gone. The body control is showing a code U1000.

I have checked all the fuses, made sure batteries a fully charged, checked all grounds, unplugged ECM connectors and checked for problems.

If I look for the vin number with the V2, their is no vin number, but the computer does show operating sys # 12597107

If you look a the GPM CVN it shows:

part# 00000000 cvn# 0708
Part# 00000000 cvn# 88F6

I can still read the tcm, tcm shows vin number.

One other thing that I noticed is that the fuel guage shows no fuel and if you turn the key to crank the engine over, nothing happens.

Any ideas how to fix would be greatly appreciated.

Frank

 

[Gmclbz]

Have you tried a full reflash?

 

[RPM Motorsports]

disconnect the grounds on the battery for a few min., re connect them and the truck should be fine.

 

[Duramax 6.6L]

disconnect the grounds on the battery for a few min and the truck should be fine

Already tried disconnecting the batteries, no difference, Even left them unhooked over night and tried again in the morning, no difference.

 

[Duramax 6.6L]

Have you tried a full reflash?

Yes I tried a full flash, I get the error message ( no data received )

When watching the screen, show as ECM not detected.

 

[RPM Motorsports]

I had one truck (LLY) that did this as well. do an emerg. re-learn on it. http://www.duramaxdiesels.com/forum/showthread.php?t=2035&highlight=emergency+relearn

 

[Duramax 6.6L]

I had one truck (LLY) that did this as well. do an emerg. re-learn on it. http://www.duramaxdiesels.com/forum/showthread.php?t=2035&highlight=emergency+relearn

Did not work

 

[ripmf666]

is it getting power to the ob2 port?

 

[Duramax 6.6L]

is it getting power to the ob2 port?

Yes it has power to the OBD port

 

[8100 Power]

Have you tried connection the scan tool to it and seeing if it responds? Seem to get me out of a similar situation when I flashed my dads LMM and it failed..

 

[paint94979]

Have you tried connection the scan tool to it and seeing if it responds? Seem to get me out of a similar situation when I flashed my dads LMM and it failed..

x2 reading has unlocked if you will my ECM from failed flashes... shit ive probably have a flash failed 15-20 times lol these ECMs are hard to kill

 

[Duramax 6.6L]

Scan tool can not connect to ecm either. Tech II is not able to connect or read. The odd thing is that my Snap on Pass Thru Pro can comunicate with the ecm. Can search for codes and comes up that ecm needs operating software installed.

I will post more as I test and find out what happened.

 

[paytonlb7]

I've ha this happen on my lbz when trying to monitor egt's with a bully dog watch dog. Try removing the snap on pro and reflash it again.

 

[$Smokin_Duradog$]

Unplug the body control module for a few minutes then plug it back in. Has worked for me in the past.

 

[Duramax 6.6L]

OK this is what happened, There is a bug in the V8 program that can cause this to happen. The bug has been fixed with the latest beta and firmware. Only problem is that I am stuck with an ecm that is not programmable.

Trying to find out if there is a fix to make the ecm usable again.

 

[07reddmax]

Any update on what to do with ecm. I am goi through the exact same thing. I feel I have tried everything I can think of. Hopefully nota new ecm.

 

[Duramax 6.6L]

ECM is done, buy new ECM and start from scratch.

On a new note I have had several lbz ecm's lock up, have a pile of them stacked on shelf. I ended up having my V2 cloned at EFI and have not had any issues since. I have tuned more than 50 lbz ecm's with out any issues.