VCFRONT_a514 — LVBMS Fault MOS Open cell UV
Full alert identifier: VCFRONT_a514_LVBMSFault_MOS_Open_cellUV
Alert description
The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a cell undervoltage condition.
Potential impact
The LV battery may be damaged and may be unable to support vehicle electrical systems.
Set condition
The LVBMS detects a cell undervoltage condition affecting the LV battery.
Clear condition
The LVBMS reports the cell undervoltage condition is resolved and internal protection transistor (MOSFET) has been requested closed again.
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 |
|---|---|
Cell 1 Voltage
VCFRONT_
|
V |
Cell 2 Voltage
VCFRONT_
|
V |
Cell 3 Voltage
VCFRONT_
|
V |
Cell 4 Voltage
VCFRONT_
|
V |
Pack SOC
VCFRONT_
|
% |
Pack Voltage
VCFRONT_
|
V |
| Signal | Unit |
|---|---|
Frunk Open
VCFRONT_
|
— |
Service Mode
VCFRONT_
|
— |
Vehicle Power State
VCFRONT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a514.