Corvette CCM Reverse Engineering Anyone?

[steveo]

this is really awesome. nobody hacks body control modules.

for the reman pin i would not think its dirtier information than anything else we do with these modules. im in a country where reverse engineering for repair purposes is legal. totally your find and your call. but if you are that worried maybe just start really detailed rumors and let someone else do it.

if the general cared that much they would have put some proper protection on it.

my main concern is scumbags rolling odos back

[steveo]

speaking of odometers, i see you managed to wipe it, but did you actually decipher it? if not, i'd like to help with that too, give me what you've found so far ? i enjoy code breaking this old stuff

[spfautsch]

speaking of odometers, i see you managed to wipe it, but did you actually decipher it? if not, i'd like to help with that too, give me what you've found so far ? i enjoy code breaking this old stuff

What I've found is pretty much contained here. PM me if you want a more intelligent explanation, sometimes I omit very important details when I'm excited from cracking 30 year old engineering.

my main concern is scumbags rolling odos back

Edit: Me also, but keep in mind you have to take 1/3 of the interior apart to remove this module. It's slightly easier than pulling the engine and just a bit more difficult than replacing all four wheel bearing hubs in an afternoon. (end edit)

I have no idea where this could go. If you look on ebay the ccms that are there all have the mileage stated as if it's some measure of value. Personally I would like to keep mine correct to wear as a badge of courage. But who knows if the run-of-the-mill C4s will ever come to be coveted by car collectors. Plastic and unreliable electronics considered.

I'm posting this for those who understand the protocol. Please don't post a public dissertation about how I accomplished it if you figure it out.

TX+F15605B4
RX+F1570500B3
TX+F15A040020002071
RX+F15604B5
TX+F15605B4
RX+F15705AA09

Looks like I will be putting mine back together in the next few days once I run some "free" miles up on the salvage ccm. :-D

[NomakeWan]

I'm posting this for those who understand the protocol. Please don't post a public dissertation about how I accomplished it if you figure it out.

TX+F15605B4
RX+F1570500B3
TX+F15A040020002071
RX+F15604B5
TX+F15605B4
RX+F15705AA09

That is insanely cheeky, I like it.