Communication with the tachograph
â–¶ How to fix
Check the yellow CAN bus cables and connectors. Also check whether the tachograph has generated any fault codes. If the vehicle is not equipped with a tachograph, the coordinator will carry out its function. In such cases, check the coordinator configuration and if the coordinator has generated any fault codes.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Communication between the bodywork control unit and the tachograph has been interrupted.
Possible cause
Short circuit or open circuit in the yellow CAN bus circuit. There may also be an internal fault in the tachograph.