LMM ecm not detected need some help.

[dieselguy9311]

any luck with that tune file. maybe something that i missed.

[dieselguy9311]

ok update. got my bench flash and i hooked up to the ecm and still says that ecm is not detected. tried to run through scan as well but can not get it to communicate with the ecm. does this mean what i think it does. is the ecm fried. i have done proably 100 truck and have never fried one. have always been able to get it going again. also i have heard that it is possible that the ecm memory got erased is there a way maybe somebody i could send it to to reflash the basics back on this ecm. could really use some help.

[VegasDMAX]

ok that is very possible and seems like a very valid thing but if my firmwire and efi live is updated to the max and it is a 2008 so it should be supported then where do i get the right files so that i can program this truck. thanks for the feed back vegas dmax. the more help the better. i still have not figured this out.

Yes, if your software/firmware is up to date, you should have all the calz files you need. Perhaps they ended up in the wrong place due to an unknown installation problem? In any case, it looks like you have caught Ross's attention so you're in good hands.

[dieselguy9311]

hope so kind of on a deadline though and guys truck is down just need a little direction on where to go from here. hope we can figure this out im sure somebody else will have this problem and hope it is easier to fix than the trouble i am having.

[GMPX]

it seemed fine once i loaded it up but like i said it said missing calibrations when i was in the reading process.

It's not really making sense, lets go from the start.
1 - You read the tune from the ECM and EFILive warned you it was missing the calibrations when it had finished?
2 - The file you read (which indicated there was errors) is the same one you posted on the previous page? If so, it looks ok.
3 - What tune did you eventually flash in to the ECM to now get it in the non responsive state?
4 - Here's the bad news, I would say the ECM is dead, I don't know why, but we need to make sure there is nothing wrong with the tune you flashed in or it will kill the next one too

Cheers,
Ross

[dieselguy9311]

i flashed a dsp5 tune into it i thought that maybe it was my tune too but before the ecm would not respond anymore i tried to flash the original tune back into it that did not work and i tried to flash another tune with the same operating system from the library from dieselplace and that did not work either. i also was wandering if it was just that ecm that was the problem since i have done other lmm's before but i hooked up to this guys dad's truck which is the exact same truck same year everything and it gave me the warning that there were missing calibrations as well. after about another 30 tries the ecm would not respond anymore. so im not so sure that i is the tune. if you think that is it i can send it if you want.

[dieselguy9311]

here it is just a tester tune he wanted to try some stuff out so dont judge. lol

[GMPX]

I'm not even going to look at the tune side of it , I just wanted to see if the file had any errors. There was some calibrations that showed out of range but normally that would not cause the ECM to brick itself. The Bosch LBZ & LMM ECM's don't brick themselves very often (but it does happen), so you are definitely unlucky. It probably is something in that tune that is causing it, so I would not be flashing that in to any other trucks.
Unfortunately as I said I think the ECM is gone and you will need to get a replacement, there is a few people on here that sell LMM ECM's, they'll even get the correct file flashed in from GM's TIS for you before shipping.

[dieselguy9311]

ok will i be able to get my license back from this ecm.

[dieselguy9311]

ya that was just egr stuff as well i didnt not figure it would matter if that stuff was maxed out to shut off since i was getting it to shut off. have done that with alot of tunes and never had a problem.