GMS auxiliary brake manager vehicle speed control state error. GMS configuration fault.
• Spare part program the COO unit. • Spare part program the GMS unit. • Check the GMS for DTCs • Check the GMS spare part number. Replace the GMS unit with a unit with correct spare part number.
What you'll see
No driver-visible symptom recorded.
System reaction
Downhill Speed Control function cannot be activated. Adaptive Cruise Control function cannot be activated and will be deactivate if already active.
Diagnostic depth
The Auxiliary Brake Manager (GMS) does not accept Vehicle Speed Request.
• COO configuration fault. • GMS configuration fault. • A GMS unit with a software not compatible with the vehicle, has been installed, e.g. a spare part GMS has been installed, which has wrong software version.