Service procedures
12 Volt Battery Reset
Power cycles all of the eFuses on the VCFRONT and VCBATT ECUs and shuts off Sleep Bypass.
PROC_VCBATT_X_12V-RESET
Model S / X (2021+)
ECU resets
2026 firmware
VCBATT UDS ECU Reset
Gen3/tasks/TEST-RESET_VCBATT
What this task does
The test resets the Low Voltage Battery Vehicle Controller (VCBATT) ECU via UDS.
Vehicle & firmware coverage
Open a version to see its description, requirements, and input definitions. Hardware configuration and live vehicle checks also determine availability.
Model S / X (2021+) AMD · Firmware 2026.20.6.1
- Vehicle coverage
- 2021+ Model S, 2021+ Model X
- Supported connection
- Local connection
- Vehicle state
- Stationary · Drive; Stationary · Neutral; Stationary · Parked; Stationary · Reverse
- Gateway diagnostic level
- Service, Factory, DiagLinkActive
Procedure notes
Vehicle will be undriveable momentarily. Make sure the ECU recovers before you run other ECU hard resetting routines.
Task inputs (0)
No user inputs are listed in this firmware.
Related service tasks
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Service procedures
Clear left headlamp latched faults in factory
Clear all left headlamp factory latched faults that were triggering leftHeadlampFactoryFault alert
PROC_VCBATT_X_CLEAR-LEFT-HEADLAMP-LATCHED-FACTORY-FAULTS
Model S / X (2021+)
Self-tests
Left Headlamp Communication Self-Test
Tests the communication of the left headlamp module with the VCBATT ECU.
TEST-SELF_VCBATT_L_HCM
Model S / X (2021+)
Self-tests
LVBMS connection test
TEST-SELF_VCBATT_X_LVBMS
TEST-SELF_VCBATT_X_LVBMS
Model S / X (2021+)