Corvette CCM Reverse Engineering Anyone?

**AngryCorvair** · 12-06-2022

Originally Posted by spfautsch

Edit: Since I just moved it, I know where my test bench cables are at, and I just happen to have a ccm thanks to AngryCorvair that I don't know the passkey value to (maybe I do, but I'll pretend I don't). Probably won't have a chance to do that until late tomorrow evening.

My apologies for the very late reply to this. I still have the steering column and keys for the CCM donor car, so I can get you the resistance value on Thursday 12/8. I'm away from home ATM.

C4 Options.jpg

EDIT: I wrote that reply when i was back on page 27. now that i'm fully caught up I see you already figured out the passkey on my (now your) CCM. I'll add a pic of the option code sticker in case any of that info would help.

**-=Jeff=-** · 12-07-2022

NomakeWan,

that particular corvette is not named Christine or is red by chance is it?

**NomakeWan** · 12-09-2022

Hahaha, nah, she doesn't have a name yet and is arctic white. But every so often, yeah, she does do some weird shit.

Just fired it up yesterday to move it out of the driveway so I could work on our race car, zero issues. Looks like my previous issue was indeed just a defective battery. Which is sad since the production date on it was May 2022. Guess they don't even make lead-acid batteries the way they used to anymore.

**-=Jeff=-** · 12-30-2022

So it warmed up enough to get out in the garage to try some stuff. I was using NoMakeWAN's Arduino code to see how well I can just read the bus and grab the data.. that was not working too well. it would see the data but get cut off or never be on the 0 index. I tried changing it around to read 2 bytes of data then read more data once it matched the first 2. but that did not seem to work. I will revisit it again and see if I can get that to work. I did get something working with printing data out to the serial port which slows it down quite a bit of course, but I don't need super fast data for it either. so right now I have something, but will play around with it some more and see if I can get it working without having the serial (to usb) print commands.

**-=Jeff=-** · 01-02-2023

1991 CCM installed in my 1990 thanks to those in this thread.. https://youtu.be/AUCy_FxxNGg

Before anyone asks about the LCD, I have the interface board from BATEE, that allows the later LCD to be used in an Early car, which I prefer

Also I have my 'Monitor' working.. I am using my Arduino DUE with the current setup I have but added a page. then I am using a Mega to read the ALDL Data and then I send a subset of the data to the DUE to be displayed.. I am thinking I might just send the whole message from the Mega, but not sure I need everything from it yet

edit: added photos

**NomakeWan** · 01-08-2023

Interface board? I don't recall seeing such a thing on BATEE. As someone who also owns a 90 I'm quite curious.

Congrats on successfully swapping in the '91 CCM!

**-=Jeff=-** · 01-08-2023

Originally Posted by NomakeWan

Interface board? I don't recall seeing such a thing on BATEE. As someone who also owns a 90 I'm quite curious.

Congrats on successfully swapping in the '91 CCM!

Not on his website but is offered.. $100 I believe, email him and ask for it.