VCBATT_a514 — LVBMS Fault MOS Open cell UV

Full alert identifier: VCBATT_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 `VCBATT_a514_cell1Voltage`	V
Cell 2 Voltage `VCBATT_a514_cell2Voltage`	V
Cell 3 Voltage `VCBATT_a514_cell3Voltage`	V
Cell 4 Voltage `VCBATT_a514_cell4Voltage`	V
Pack SOC `VCBATT_a514_packSOC`	%
Pack Voltage `VCBATT_a514_packVoltage`	V

Signal	Unit
Frunk Open `VCBATT_a514_frunkOpen`	—
Service Mode `VCBATT_a514_serviceMode`	—
Vehicle Power State `VCBATT_a514_vehiclePowerState` 0 OFF 1 CONDITIONING 2 ACCESSORY 3 DRIVE	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCBATT_a514.