VCLEFT_a515 — LVBMS Fault MOS Open cell OV

Full alert identifier: VCLEFT_a515_LVBMSFault_MOS_Open_cellOV

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 overvoltage 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 overvoltage condition affecting the LV battery.

Clear condition

The LVBMS reports the cell overvoltage condition is resolved and internal protection transistor (MOSFET) has been requested closed again.

Signals to check

These diagnostic fields are associated with VCLEFT_a515. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Cell 1 Voltage `VCLEFT_a515_cell1Voltage`	V
Cell 2 Voltage `VCLEFT_a515_cell2Voltage`	V
Cell 3 Voltage `VCLEFT_a515_cell3Voltage`	V
Cell 4 Voltage `VCLEFT_a515_cell4Voltage`	V
Frunk Open `VCLEFT_a515_frunkOpen`	—
Pack SOC `VCLEFT_a515_packSOC`	%
Pack Voltage `VCLEFT_a515_packVoltage`	V
Service Mode `VCLEFT_a515_serviceMode`	—

Show 1 more field

Signal	Unit
Vehicle Power State `VCLEFT_a515_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 VCLEFT_a515.