Faulty vehicle speed signal from the TCO (VEHICLE_SPEED_INFO_TCO)
▶ How to fix
Check the TCO and the COO ECUs for DTCs.
What you'll see
No driver-visible symptom recorded.
System reaction
When the DTC is active, the ACS malfunction warning will be active and the system will enter limp home mode.
Diagnostic depth
Detection
The DTC becomes active when the value of the signal TachographVehicleSpeed in CAN message TCO1 is “Error”. The DTC becomes inactive when the value is not “Error”.
Possible cause
Any failure in the TCO or the COO.