That's a good find Joe, it appears to be a real DTC in your case. Many times it seems that the U1xx CAN codes are caused by a low 12V starter battery.
Did you look under the rear seat to inspect the wiring harness around the EV-ECU? Also look for rodent damage on the exposed harness section under the car back to the OBC and inspect the brown-colored Junction Connector for CAN1 and CAN2. The OBC is on the CAN2 buss.
There are some resistance measurements that can be made at the connector pins, found on this page:
http://mmc-manuals.ru/manuals/i-miev/online/Service_Manual/2012/54/html/M154830250113000ENG.HTM
