Efficient: CAN frames are prioritized by ID numbers. The top priority data gets immediate bus access, without causing interruption of other frames. Reduced vehicle weight: by the elimination of kilometres of heavily insulated electrical wires and their weight from the vehicle. ...
More important messages have lower ID numbers. If multiple nodes transmit at the same time, they start a simultaneous arbitration. The node with the lowest message ID number gets priority. Dominant bits overwrite recessive bits on the CAN bus....