CAN communication
â–¶ How to fix
Check whether CAN communication is normal or whether there are any faults transmitted from the ACC control unit or another unit on the green CAN communication wiring.If the auxiliary heater or auxiliary heater remote control are not communicating, test by disconnecting them one at a time to check whether CAN communication starts working again.Then test by renewing the control unit which is not communicating.As a last resort, renew the ACC control unit. Calibrate the new control unit by erasing the fault codes.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
No CAN communication.
Possible cause
Fault in wiring or connector for CAN communication or fault in the unit which does not communicate.