CCM

[dmacy]

Not sure if this is the place to post this but I replaced The CCM on my 94 Corvette. The Problem is my mileage is off. When I went to the Inspection station, they plugged into the ALDL and the Mileage didn't match the mileage that was on record for the car from the RMV. I downloaded the Bin from the PCM but see no way of editing the CCM. Any help would be appreciated.

[steveo]

believe it or not that's a really hard problem to solve as the CCM is totally locked down against reflashing so people cant just roll back the odometer

but we cracked it between me and another guy here that goes by spfautch and it took like a thousand hours of work

he found the hacks to actually enable editing, and i took that and ran with it, and have built a reflash tool from the ground up for the CCM into my flashhack tool (coincidently also the best LT1 flash tool, see my signature)

the main challenge with the CCM is to break the security is you have to physically pull the CCM out to ground a pin inside to disable its security and re-flash it. we call it the 'reman pin'

instructions for finding the pin are included with flashhack

assuming your old CCM works at all you could actually read its bin file and just flash it to the new ccm too....then the odometer, vin, and all the other crap would be proper.

[steveo]

oh, and i have a spare CCM here with no home, although it requires some assembly, so if you totally mess up and brick yours, no fear there......

[steveo]

here is the original thread

http://www.gearhead-efi.com/Fuel-Injection/showthread.php?10219-Corvette-CCM-Reverse-Engineering-Anyone

[dmacy]

believe it or not that's a really hard problem to solve as the CCM is totally locked down against reflashing so people cant just roll back the odometer

but we cracked it between me and another guy here that goes by spfautch and it took like a thousand hours of work

he found the hacks to actually enable editing, and i took that and ran with it, and have built a reflash tool from the ground up for the CCM into my flashhack tool (coincidently also the best LT1 flash tool, see my signature)

the main challenge with the CCM is to break the security is you have to physically pull the CCM out to ground a pin inside to disable its security and re-flash it. we call it the 'reman pin'

instructions for finding the pin are included with flashhack

assuming your old CCM works at all you could actually read its bin file and just flash it to the new ccm too....then the odometer, vin, and all the other crap would be proper.

Thanks for the info I will give it a try. I have nothing to loose. If I brick it I will let you know and try on a second one. I really don't care about the mileage but the registry thinks it is fraud. I guess I could try to deal with them to resolve the issue but you know what it is like to deal with them.

Thanks again
Dave

[steveo]

where i live the DMV has a form for odometer replacement that you can fill out

[dmacy]

They have that form here also. But it is a hassle to do. Once done it looks like you tried to falsify the odometer. The inspection station already rejected it because the milage is different from the last time it was inspected. It all gets reported to the DMV. At least I got the right right VATS code. I am going to disable the VATS.

[dmacy]

Tried to download the calibration from the pcm before moving on to the ccm. About halfway through the download failed. I tired a second time and got an error message that the bus was noisy. I am thinking it is my aldl cable.

[dmacy]

I don't have a problem replacing my cable but don't know what to get. Moates is out of business. Not sure who makes a quality cable

[dmacy]

19525

This is the message I get now

[dmacy]

When the download starts the fans start and then shut off. When this happens the download pauses then continues with the fans off. When the download is complete I get the error. The fans must cause a voltage drop which can't be good.