Communication with the tachograph (TCO)
â–¶ How to fix
Check the connection to the tachograph.Check the yellow CAN bus cable harness and connectors.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
No CAN messages from the tachograph.
Possible cause
The tachograph is not connected to the CAN bus.