VCFRONT_a497_LVBatteryWarnDisconnect
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.
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.
Potential Impact
The LV battery may become too deeply discharged and unrecoverable.
Customer Facing Message 1
Disconnect low voltage battery to prevent overdischarge
Customer Facing Message 2
Low voltage battery may become unusable
Audiences
service-fix
Models
Model 3 2017-2023;Model 3 2024+;Model Y;Model Y 2025+