Unable to read ecm

[Tonyorlo]

Sorry folks, I have a few threads on here for the same vehicle but different subjects.

Working on a 07 TBSS, when I connect the mpvi3 to the truck with the original ecm in it I get an unable to connect screen. However when I connect another ecm from the same year trailblazer with a v8, HPtuners recognizes it and will allow me to read the file. Could my original ecm be bricked? I?ve always thought that wasn?t possible with e67s? I am unable to make the changes to the spare ecm to work in my application by myself using HPtuners right? It will require a tech2 tool to make the changes needed from what I understand.

IMG_5319.png

That?s the screen I get when connected to the original ecm.

Any help would be greatly appreciated. If anyone?s able to spend a little time helping me out I?d gladly gift you some money on PayPal.

[biholliday]

could be tuner locked. Do you have credits for each ecm?

[Tonyorlo]

The ecm that won’t connect has credits, the other 2 that would connect don’t have credits.

[biholliday]

were you able to read the original with the editor not the scanner? Im asking because when i first started out with hptuners when i tried to read with the editor thats when i found out that my ecm was tuner locked and it took me to the screen to type in the code which i did not have and ended up buying a new ecm

[Tonyorlo]

Oh wow, were you atleast able to pull the tune? Yeah I was able to read and write with the editor before. The scanner had no issue connecting either. I tried a cheap scan tool and it was unable to connect also.

[biholliday]

no. it was tuner locked so i had to buy a new ecm and have the local dealer flash the stock tune before i could start tuning

[Tonyorlo]

I have a spare ecm same year. I wonder if I could have a dealer correct the vin for me so I can write my tune to it.