IBST_a187 — Brake Bus Off
Full alert identifier: IBST_a187_brakeBusOff
Alert description
The CAN Bus status is monitored cyclically, whenever there is a short circuit between CAN-H and CAN-L or a heavy bus disturbance which leads to BusOff, the fault is registered
Potential impact
Vehicle hold and AutoPilot disabled
Set condition
ESP is not receiving any message traffic on BRAKE bus
Clear condition
Check BRAKE bus for continuity and traffic on bus. Confirm BRAKE bus issues with MIA alerts on other devices. Power cycle.
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of IBST_a187.