VCFRONT_a478_LVBMS_MOSFET_Open
Description
The low voltage battery management system (LVBMS) has opened the low voltage (LV) battery's internal protection transistor (MOSFET), disconnecting the LV battery from the rest of the vehicle electrical systems.
Condition
The LVBMS reports the LV battery's internal protection transistor (MOSFET) is open.
Clear Condition
The LVBMS reports the LV battery's internal protection transistor (MOSFET) is closed again.
Potential Impact
The LV battery is unable to support vehicle electrical systems or to recharge via the power conversion system (PCS). The high voltage (HV) system will remain energized to continue supplying electrical power to the vehicle while the LV battery is unavailable. This may result in greater range loss than expected, increased HV system energy consumption when the vehicle is idle, and prevent the vehicle from sleeping.
Customer Facing Message 1
Low voltage battery service is required
Customer Facing Message 2
Schedule service - Vehicle may not restart
Audiences
service-fix
Models
Model 3 2017-2023;Model 3 2024+;Model Y;Model Y 2025+