DPB_a101 — Ecu Fast Wd Test Fault
Full alert identifier: DPB_a101_ecuFastWdTestFault
Alert description
Missing Built-In Self Test (BIST) trigger didn't swicth off hydraulically or electrically as expected.
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 (e.g. BIST of system IC either does not detect a correct BIST command or missing BIST commands), The failsafe logic test tests whether the watchdog of the system chip can be started with the first watchdog trigger signal from the BIST state machine. Additionally it is tested that the watchdog switches off hydraulically respective electrically if the BIST state machine is not triggered during the corresponding timeout times.
Clear condition
No internal issue is detected after changing operation cycle. If the condition persists, the DPB module may require replacement.
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With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DPB_a101.