CAN Bus Interpretation

[lkv0315]

Originally Posted by gpeterson

Little to none, CAN is designed to be robust. You could absolutely interrupt bus traffic and set all sorts of codes, cause trans failsafe message, etc. by improper termination, shorting the bus or flooding it with high-priority messages.



You should make sure whatever device you connect is not terminated (since the bus is already terminated at both ends) and follow general CAN rules regarding wiring.



I'm guessing whatever hardware you use will live inside the car, so I'd tap in at the cluster or somewhere else inside. I would also look up pinouts on WDS and not rely on wire colors alone. You will want to use the bus that connects a number of modules, not the one specifically used for DME to AGS communication.

So what exactly do you mean by terminated? I’m not sure how I would be able to connect into the canbus wires without creating a termination. This add on board has a CAN H and CAN L screw down terminal block which I was using inline wire taps to get a signal for (plastic things with a metal insert that poke a hole in the side of the wire to give connection to another wire)
The only way I can think of to “avoid terminating” would be to cut the can bus wires, and run two wires to each of the boards terminals, so the connection between the modules is not being intercepted by the add on board, but is instead required to go through it


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