Corvette CCM Reverse Engineering Anyone?

[spfautsch]

Inside the CCM somewhere is a pin that, if grounded, will override this bit.

Mind my asking where you uncovered this tidbit? My assumption was that the eeprom would have to be erased directly with a jtag type device. This also gives me something to look for on the remanned unit.

I'll get some high-res pics up shortly.

The CCM does not have any ability to query other modules to set values in EEPROM. These are only set by an external tester (Tech 1A, Tech 2, etc).

Is this info from the FSM? Mine haven't arrived yet. I'm not disputing this statement but it seems like if it can ask the PCM for message 41 it could also ask it for the VIN, and derive the engine code from that. Though I doubt that's the case.

Also wouldn't the VATS voltage / resistor code have to be set here?

Am I correct to assume the odometer is stored solely in the CCM?

Replacing the CCM with something else would be a massive undertaking.

Exactly. Without it you have no speedometer and the engine can't be turned over unless the starter disable relay is bypassed.

I guess I've gotta go to eBay and get a Tech2 on the way from Hong Kong. I'm very interested to know if this remanned unit has had the eeprom cleared.