BMS_a129 — SW VSH Failure
Full alert identifier: BMS_a129_SW_VSH_Failure
Message shown in the car
Vehicle may not restart Service is required
Alert description
The Battery Management System (BMS) has detected a high voltage sense harness (VSH) impedance.
Potential impact
Inability to charge, drive, or support the Low Voltage (LV) system
Set condition
The BMS detects a VSH impedance value above the threshold.
Clear condition
All bricks report VSH impedance values within the threshold.
Signals to check
Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.
| Signal | Unit |
|---|---|
Brick ID
BMS_
|
— |
Delta V
BMS_
|
V |
Retry Count
BMS_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of BMS_a129.