DPB_a102 — Ecu Vr On While Wd Timeout
Full alert identifier: DPB_a102_ecuVrOnWhileWdTimeout
Alert description
The missing watchdog don't switch off the valve relay.
Potential impact
System will be running in fully degraded state. Braking may require increased effort. Hydraulic Boost Compensation will be triggered when driver pressed brake pedal.
Set condition
Erroneous safety logic (Watchdog timeout detection of system chip erroneous). The failsafe logic test tests whether the system chip detects a missing watchdog trigger and therefore swichtes off the gate actuation of the valve relay. If the feedback does not show a switched off valve relay gate this fault is set.
Clear condition
No internal issue is detected after changing operation cycle. If the condition persists, the DPB module may require replacement.
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DPB_a102.