CAN communication
â–¶ How to fix
Check the yellow CAN bus wiring and connectors and measure the voltage level. If necessary, use the troubleshooting tips under the heading "Communication problems" under "Help" in SDP3.The tachograph's special test instrument can be used to check that the correct type of CAN bus is specified in the tachograph. Adjust as necessary with the test instrument.Check also whether the coordinator or instrument cluster has generated any fault codes.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The tachograph has no contact with the yellow CAN bus.
Possible cause
Short circuit or open circuit in the yellow CAN bus.