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Service procedures 2026 firmware

LVBMS Reconnect LV Battery

Gen3/tasks/PROC_VCFRONT_X_RECONNECT-LV-BATTERY

What this task does

Reconnects the Low Voltage (LV) Battery's MOSFET.

Vehicle & firmware coverage

Open a version to see its description, requirements, and input definitions. Hardware configuration and live vehicle checks also determine availability.

Model 3 / Y AMD · Firmware 2026.32.3
Vehicle coverage
2024+ Model 3, 2025+ Model Y, Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Parked
Gateway diagnostic level
No specific level listed

Procedure notes

To run the reconnection routine, the vehicle must support its own Low Voltage (LV) system and any external LV support device must be disconnected.

Task inputs (0)

No user inputs are listed in this firmware.

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Power cycles all of the eFuses on the Vehicle Front Controller (VCFRONT) and shuts off Sleep Bypass.

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Self-tests

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Self-tests

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Tests for power, connection, and communication of the ambient sensor controlled by the Front Vehicle Controller (VCFRONT).

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Tests for power, connection, and communication of the battery coolant pump controlled by the Front Vehicle Controller (VCFRONT).

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Model 3 / Y Model S / X (2021+)