VCLEFT_a518 — LVBMS Fault MOS Open pack OV

Full alert identifier: VCLEFT_a518_LVBMSFault_MOS_Open_packOV

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 pack 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 pack overvoltage condition affecting the LV battery.

Clear condition

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

Signals to check

These diagnostic fields are associated with VCLEFT_a518. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
IBS Voltage `VCLEFT_a518_IBSVoltage`	V
Frunk Open `VCLEFT_a518_frunkOpen`	—
Output Voltage At PCS `VCLEFT_a518_outputVoltageAtPCS`	V
Pack SOC `VCLEFT_a518_packSOC`	%
Pack Voltage `VCLEFT_a518_packVoltage`	V
Service Mode `VCLEFT_a518_serviceMode`	—
Target PCS Voltage `VCLEFT_a518_targetPCSVoltage`	V
Vehicle Power State `VCLEFT_a518_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_a518.