Quote:
Originally Posted by Thaniel
Baud rate for the PT-CAN bus (only CAN bus in an E53, I expect) is 500k.
What do the wires you connected to attach to?
CAN bus wires are twisted pair. For the E46 and similar vehicles (probably E53) it is yellow/brown and yellow/red or something very similar. Might be good to check a wiring diagram. It should clear it up. Careful with yellow wires as yellow is often used in airbag systems. Don't randomly try wires. Also CAN bus is 5V or less. Tapping a 12V wire could have bad consequences.
Make sure CAN H and CAN L are not reversed as well.
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I didn’t check the module, but it was the lowest module in the rack behind the glovebox. I assume the DME, since the plug looks just like the one in that pic. I grabbed those two wires, and a wiring diagram I’d consulted shows that it is yellowblk and yellowbrn as high/low respectively, which I did with red and black wires respectively. I also got nothing when I reversed the polarity on the can receiver. I will try a 500k baud in a bit!