APP_w157 — Sccm Mia Veh Bus
Full alert identifier: APP_w157_sccmMiaVehBus
Alert description
One or more of the messages the Autopilot electronic control unit (ECU) receives periodically from the steering column control module (SCCM) ECU is not received on the Vehicle (VEH) bus, indicating the SCCM ECU may be unavailable (MIA).
Potential impact
Autopilot features may be unavailable, or may not function as expected.
Set condition
One or more of the expected messages from the SCCM ECU is not received on the Vehicle (VEH) bus.
Clear condition
The Autopilot ECU starts receiving expected messages from the SCCM ECU on the Vehicle (VEH) bus.
Signals to check
These diagnostic fields are associated with APP_w157. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Left Stalk
APP_
|
— |
Right Stalk
APP_
|
— |
Steering Angle Sensor
APP_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of APP_w157.