Error Screens
Important: The OnGuard collision safety system is not operational when an error screen is displayed. If a fault occurs or OnGuard fails to properly track a vehicle, take the vehicle in for service as soon as possible. Standard cruise control will not function with an active OnGuard system fault.
If a system fault is detected, the OnGuard display unit will immediately display an error screen as shown in Fig.. The first error code transmitted will be displayed first; additional faults (if any) can be viewed using the up or down buttons. The display does not show stored fault codes.
Fig. 1, OnGuard Error Screen (amber)
Refer to the OnGuard Collision Safety System Maintenance Manual MM-0951 for a full list of faults (www.meritorwabco.com).