I'm looking into building a canbus simulator (Something like this
) with an arduino and a canbus shield. The hardware and software portion should be relatively simple, but since I don't have access to a B6 or late C5 I can't think of a way to find the PIDs and messages that I need to transmit to the radio. Is there any way to find these PIDs other than logging canbus communications? From what I understand these messages are broadcast by the instrument cluster, but would I be able to find any useful information from the radio by itself?