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I see... Source Destination stuff is possible obviously, but I personally have never seen like you see in Class 2 3 byte headers or ISO 9141. As was mentioned earlier, 29bit is definitely used as a Priority/Destination/Source addressing scheme, but is a lot of overhead for most high speed applications. So typically you wont see too many manufacturers use 29bit for their Powertrain buses, but rather for their Chassis buses.
You are definitely on the right track. Reverse engineering is the only way to figure out what is going on here.
After you have finished with your Reverse engineering what do you plan on doing with the info? Are you going to post it somewhere?
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