Bench harness? or In vehicle?
Have you used the clone MDI with anything else with this same setup and verified everything else works?

As far as clone MDI, not all are the same but with exception to the really old ones that were a hacked form of a vcx nano the clone should work ok.

I have run into this and have gotten it to program.. It was awhile ago though, think I might have posted how I did it here, I was working with Tazzi at the time.. Basically I used a Y cable and inserted the correct response at the right time so the programming would continue and it worked.. Think I ...

For me, in terminal mode there was Raw mode or Line mode and they both ended up functioning the same.. Raw sends each key as you type it but nothing happens until you press enter and it sends the return. Line mode doesn't send anything until you press enter.. The elm didn't seem to care, I got the ...

in plain mode you type on the bottom left of the screen, should see what your typing and then it sends everything when you hit return, that is when you should see send and receive led's flicker, not for every key as you type it. Well this is interesting! I didn't notice any place in the bottom left...

I'm not at the shop anymore, but yes.. When I was using plain mode I could type atrv and get back voltage, 0105 for coolant temp, 0902 for vin, etc and it spit back the correct response.. When I had hex selected I had to type in hex equivalent of of ascii, like 39 32 for 0902.. in plain mode you typ...

I just downloaded and tried coolterm and it works fine with the first elm327 I grabbed, a bluetooth 38,400 baud unit claiming ELM 327 v1.5. Default settings used other than changing the com port and baud rate. EDITED!!!! Hold everything.. with coolterm... Click on the view button on the upper right,...

What program are you using for a terminal program?? There may be a setting that is off..

That looks like it's responding the same as the one I was working on.. I suspect you could bring it back to life if you tried programming the correct OS and calibrations to match the boot and eeprom just like the E38 ecm's. Do you have anything to read the flash? You could probably find the vin and ...

Just went thru this with an independent garage that put a used transmission into a 2016 Acadia. They had some remote flashing company come to them and they bricked it, making it even worse. This was disclosed to me AFTER I drove there and starting looking at it and told them this was not a simple re...

NP, It's ECU.BruteForcer.0.0.8.7z that you posed a while back. I'll reach out to some friends and see if anyone has a gm mdi I can test with. ok, I had forgotten I posted an .exe here.. you'll need to install a .net for the brute force to work.. I do not think you need it for the powerpcm program t...