BMS_a156 — SW BMB Vref bad
Full alert identifier: BMS_a156_SW_BMB_Vref_bad
Message shown in the car
Unable to charge Service is required
Alert description
The Battery Management System (BMS) detects an out-of-bounds module voltage reference.
Potential impact
This alert is primarily informational. Other BMB voltage signals will be substituted given the reference voltage is unreliable.
Set condition
Any battery monitoring board (BMB) reference voltage has continuously deviated outside the in-bounds threshold of the nominal voltage.
Clear condition
All BMB reference voltages continuously remain within the in-bounds threshold of the nominal voltage.
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 |
|---|---|
Vref Sample
BMS_
|
V |
| Signal | Unit |
|---|---|
Vref Status
BMS_
|
— |
Bmb Device 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_a156.