Time conflict (GNSS vs VU internal clock)
â–¶ How to fix
* Check for evidence of tampering. * Check GNSS antenna and cables//internal antenna in tachograph
What you'll see
No driver-visible symptom recorded.
System reaction
* Warning displayed in the tachograph display * System event in TCO1 CAN message is set to active * Tachograph warning displayed in the instrument cluster
Diagnostic depth
Detection
VU internal clock differs with GNSS clock
Possible cause
VU internal clock differs with GNSS clock