LMM: EFI Live Doesn't Pickup ECM

[duramax3388]

Hello looking for some help. My friend just picked up a 7.5 LMM with a DSP5 switch and tuning from Cory Willis on a AutoCal some how in messing with the autocal trying to reflash to make sure the files where in the truck it messed up. Now the truck is dead will not roll over dash gauges do seem to light up with the key its just dead. So I roll out the old V2 that I haven't used is along time and just try to read the ECM and it will not even recognize it just to make sure its not the V2 and me being rusty I went over plugged it into my Tahoe and it popped right up and read the file. So is there anything I need to look for or is it as bad as we think and the ECM fried? Thanks for the help

 

[clrussell]

The batteries on the lmm good? Cig fuse?


Sent from my iPhone using Tapatalk

 

[PureHybrid]

So it failed to flash? I was always told to try and reflash again before messing with things.

Kind of confusing how you worded it

 

[duramax3388]

Yes good batteries. I'll check the fuse. Not sure what he did to it but once it finally uploaded the truck was dead will not turn over. And the Autocal now shows no files to upload so it's empty? Sorry it's been a long time since I've used efi trying to relearn all the stuff and figure how how this new windows works.

 

[duramax3388]

Just checked the fuses and cig has Power checked some other fuses and all looked good. So he read or tried to several times once it finally did read or said it did and uploaded the file, once it uploaded truck was dead will not start. Tries to upload again and no file on the Autocal to upload now. So he got a new laptop and I hooked up the V2 can't get it to even recognize that the ecm is there, then i try my tahoe to see if it's me or the truck and it works just fine on it.

 

[PureHybrid]

So it took several tries to get the stock ecm calibration uploaded from the ecm?

I'm not real sure, other than see if a tech 2 can flash a stock file to it. Maybe it was locked to start with?

 

[TheBac]

Honestly, it sounds like the ECM bricked. Way, way back when EFI was brand new, Tony tried to read my original ECM and it would not read, no matter what he did. Had to buy another from Merchant, which worked as it should.

 

[onebaddmaxxx]

so did the truck stop mid flash? did it come unplugged during flash? what exactly happened. your details aren't specific enough

in response to toms ecm-----lb7s are finicky to begin with. If you try to read the calibration and it will show money signs or weird writing usually it won't take a tune. But, the lbz/lmm ecms are very good. for one, you can NOT read a dsp tune out of an 06+ truck. And two, just making sure, you didn't try to flash an lbz tune in it did you? They will go in, and when its done flashing, it will be bricked for sure. What is the error code when you attempt to flash the tune in off the auto cal?

 

[duramax3388]

He's not sure what he did but that after he got done doing the flash the autocal has no files on it now. I was able to manually pick the E35 (LMM) ecm and for it to do a manual read but the file it pulled out is unreadable. Looks as if in '7.5 it can see the Vin and ecm but doesn't get any response out of it. So is it bricked? Anything I have to do to a new one rockauto has one for 261 plus a 100 something core change.

 

[onebaddmaxxx]

doubt its bricked....just download a stock tune file for an lmm off tunefiledepot.com and full flash it in, it may say that the ecm has a broke calibration do you still want to flash yada yada yada hit yes and flash. it will go.

 

[TheBac]

Is it just me, or does that say that the connection to the ECM is ok, twice? It looks like it's hanging up on the TCM.

(sorry, not an EFI Live guru -- I still use a V1)


Logan, I did not know that about LBZ ECMs. Interesting. Thanks for that info.

 

[Awenta]

Try loading a stock tune as mentioned.

There's an lmm being parted out in garage sale if you need an ecm

Sent from my SM-N910V using Tapatalk

 

[onebaddmaxxx]

It's because he used 7.5. If he used auto detect in v8 then calibration details it will be a lot more refined and not show half of that stuff. I bet it just has a broken serial and calibration, probably won't even require a license to try to flash. my v2 cable is wore out on the v2-usb cord. It lost connection mid flash on an lbz and the v2 wouldn't make enough contact to re flash the truck, used a friend v2 and because the serial was blank, it loaded the tune in and never asked to license it. Takes some F$cking up to learn some neat tricks around things...:thumb:

 

[duramax3388]

V8 on auto detect will not do anything and 7.5 is the only thing I really know been 4 or 5 years since I've even owned a dmax so the 7.5 was just what I kinda knew. What OS should I try since we don't have a stock tune to go off of? just pick something and hope it work? don't really want to waste a license on this ecm if its bricked and have to buy another license for a new one as well.

 

[rfletes79]

Your trying to read a DSP tune on an LMM. This can't be done, all LBZ and LMM DSP tunes are locked and cannot be read with an AutoCal or V2.

You should be able to do a full flash with your AutoCal. If you choose to use the v2 to do the full flash you will need a license and a tune. You can't use the tune from the AutoCal for your v2.

 

[duramax3388]

Your trying to read a DSP tune on an LMM. This can't be done, all LBZ and LMM DSP tunes are locked and cannot be read with an AutoCal or V2.

You should be able to do a full flash with your AutoCal. If you choose to use the v2 to do the full flash you will need a license and a tune. You can't use the tune from the AutoCal for your v2.

Ok that makes since. Can I just load up something on the autocal because its blank now(nothing to choose from in the upload menu or whatever it is) or am I going to have to do the V2 and what do I use to flash it with just pick one of the 2 files on the website above and hope one runs everything.

 

[rfletes79]

Autocals are "linked" to a specific v2. If the AutoCal came from kory then you'll have to get tunes from him or send it to him to un-link it, then link to your v2 and write/load tunes to it. You shouldn't need a new license for the AutoCal as it is already licensed to that controller.

 

[onebaddmaxxx]

If the ecm is bricked, it will error before you even get to the license part...it has to unlock the boot loader first before anything happens. I would try it before even buying a license. Like I said if the serial and cal is broke, it will flash it in and doubt that it will ask for a license, but the next time you go to flash it, will need to be licensed. Most Lmm run a 8594 OS. So I'd just pick one a try.

 

[duramax3388]

Thanks Logan and everyone else that helped the full flash worked now just to put a license on it and get rid of the dpf and dsp5 tune if I can find one that will work.

 

[TheBac]

Glad I was wrong.