BMS_a171 — SW Stack Voltage Sense
Full alert identifier: BMS_a171_SW_Stack_Voltage_Sense
Message shown in the car
Unable to charge Service is required
Alert description
The Battery Management System (BMS) has detected an issue with brick voltage measurement.
Potential impact
Inability to charge, drive, or support the Low Voltage (LV) system
Set condition
The BMS detects a mismatch between a stack's voltage and the sum of its brick voltages.
Clear condition
The BMS detects that the condition clears.
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 |
|---|---|
Stack Voltage
BMS_
|
V |
Sum Brick Voltage
BMS_
|
V |
| Signal | Unit |
|---|---|
Stack Id
BMS_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of BMS_a171.