DTC U0001-49: High speed CAN communication Bus - Internal electronic failure: Action

Using the manufacturer approved diagnostic system, complete the CAN Network Integrity test. Refer to the appropriate electrical circuit wiring diagrams and check the CAN network to the Headlamp Leveling Module. If no CAN Bus circuit faults are evident suspect Adaptive Front Lighting System (AFS) Control Module internal fault, replace as required. Refer to the new module/component installation note at the top of the DTC Index