Joined: Jan 2018

Posts: 864

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As an offshoot of the open source reflashing project described in another thread, I made a list of all of the modules on the bus in my 2002 Corvette. But all I have are the module ID numbers - does anyone know which module does what?

The "TX" lines in the log below show what command was sent from the app to the car - it's 6C FE F0 A0, which basically means the app (F0) asked all of the other modules (FE) for permission to switch to high-speed mode. The "RX" lines in the log show the responses coming back - 6C F0 XX E0 YY translates to the module (XX) telling the app (F0) that it is OK to switch to high-speed mode, and the module will either switch to 4X (YY = AA) or just wait until 4X is over (YY = BB). (I have to thank PeteS160 for explaining this all to me!)

But what are modules A6, 40, 10, 28, etc? I'm sure ABS, BCM, and TC are in there, but which is which? Does anyone know?