Division (211) F1

The time setting of the VU internal clock shall be automatically re-adjusted every 12 hours. When this re-adjustment is not possible because the GNSS signal is not available, the time setting shall be done as soon as the VU can access a valid time provided by GNSS receiver, according to the vehicle ignition conditions. The time reference for the automatic time setting of the VU internal clock shall be derived from the GNSS receiver.