Communication with the tachograph
â–¶ How to fix
Check the yellow CAN bus wiring and connectors. Check the circuit for the tachograph power supply (30) and the circuit for the tachograph's activation signal (15). You can see whether the tachograph 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 the coordinator and the tachograph 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 tachograph power supply.Internal fault in the tachograph.