VCLEFT_a497 — LV Battery Warn Disconnect
Full alert identifier: VCLEFT_a497_LVBatteryWarnDisconnect
Alert description
The low voltage (LV) battery internal protection transistor (MOSFET) is open, while the LV battery is at low state of charge and recovering the MOSFET is not being attempted. As a result, the low voltage battery management system (LVBMS) continues to draw power from the cells, which may make the LV battery unrecoverable if it is not disconnected soon.
Potential impact
The LV battery may become too deeply discharged and unrecoverable.
Set condition
The LV battery state of charge (SOC) is less than 30%, the LV battery internal protection transistor (MOSFET) is open, and there are no low voltage battery management system (LVBMS) communication or firmware mismatch issues.
Clear condition
The LV battery internal protection transistor (MOSFET) is closed and the LV battery is electrically connected to the vehicle and charging, or the LV battery is disconnected from the wiring harness to prevent further discharge.
Signals to check
These diagnostic fields are associated with VCLEFT_a497. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
Factory Mode
VCLEFT_
|
— |
Pack Current
VCLEFT_
|
A |
Soc
VCLEFT_
|
% |
Sum Cell Voltage
VCLEFT_
|
V |
Frunk Open
VCLEFT_
|
— |
Service Mode
VCLEFT_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a497.