USM_a112 — EPBL MIA
Full alert identifier: USM_a112_EPBL_MIA
Alert description
One or more of the messages the vehicle controller receives periodically from the left Electronic Park Brake (EPBL) electronic control unit (ECU) is not received, indicating the EPBL ECU may be unavailable (MIA).
Potential impact
The parking brake may be unavailable or may not function as expected.
Set condition
The vehicle controller does not receive one or more of the expected messages from the EPBL ECU within the expected time frame.
Clear condition
The vehicle controller starts receiving the expected messages from the EPBL ECU.
Signals to check
These diagnostic fields are associated with USM_a112. Check the alert's Payload in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
CH Status
USM_
|
— |
LIPC LV Power State
USM_
|
— |
LIPC Epb Private State
USM_
|
— |
LIPC Rail Status
USM_
|
— |
LIPC Remote ADC
USM_
|
— |
LIPC Switch Status
USM_
|
— |
PARTY Status
USM_
|
— |
VEH LV Power State
USM_
|
— |
Show 3 more fields
| Signal | Unit |
|---|---|
VEH Internal Status
USM_
|
— |
VEH Status
USM_
|
— |
VEH Veh Nm
USM_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of USM_a112.