Communication with the AWD control unit
â–¶ How to fix
Check the yellow CAN bus cables and connectors. Check the AWD control unit voltage supply circuit (30) and also the AWD control unit activation signal circuit (15). You can see whether the AWD control unit has generated any fault codes via the instrument cluster.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Communication between coordinator and AWD control unit has been interrupted.
Possible cause
The fault may be due to: Open circuit in the yellow CAN bus.Short circuit or open circuit in the AWD control unit power supply.Internal fault in the AWD control unit