Hi sergey25,
Do you mean short CAN-TX and CAN-RX? or CAN-H and CAN-L?
Dose this patch not work for your case?
Could you share the result of the following command on your board when you in this state?
$ ip -s -d link show can0
and… do you use ip link set command to re-configure CAN after you recover the “shorten two CAN wires”?
Please share the following information for further check…
- detailed reproduce steps
- the block diagram of your connection
- full serial console log