USM_a114 — ESP MIA
Full alert identifier: USM_a114_ESP_MIA
Alert description
One or more expected Controller Area Network (CAN) messages from the Electronic Stability Program (ESP) electronic control unit (ECU) was not received. Stability and traction control functions may be unavailable, or their performance may be affected.
Potential impact
Stability and traction control functions may be unavailable, or their performance may be affected.
Set condition
An expected CAN message from the Electronic Stability Program (ESP) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the ESP is CAN active. The ESP is considered CAN active when VCFRONT_privateGoToSleep is 0 AND VCFRONT_espLVState is LV_ON.
Clear condition
All expected CAN messages from the Electronic Stability Program (ESP) electronic control unit (ECU) are received, or the ESP ECU is CAN inactive.
Signals to check
These diagnostic fields are associated with USM_a114. Check the alert's Payload in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
BDY Offsets
USM_
|
— |
BDY Party 3
USM_
|
— |
BDY Status
USM_
|
— |
BDY Wheel Rotation
USM_
|
— |
BDY Wheel Speeds
USM_
|
— |
CH Party 1
USM_
|
— |
CH Party 3
USM_
|
— |
CH Status
USM_
|
— |
Show 12 more fields
| Signal | Unit |
|---|---|
CH Wheel Rotation
USM_
|
— |
CH Wheel Speeds
USM_
|
— |
PARTY Brake Torque
USM_
|
— |
PARTY Offsets
USM_
|
— |
PARTY Party 3
USM_
|
— |
PARTY Status
USM_
|
— |
PARTY Wheel Rotation
USM_
|
— |
PARTY Wheel Speeds
USM_
|
— |
VEH Party 3
USM_
|
— |
VEH Status
USM_
|
— |
VEH Wheel Rotation
USM_
|
— |
VEH Wheel Speeds
USM_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of USM_a114.