Service procedures
12V Reset
Power cycles all of the eFuses on the Vehicle Front Controller (VCFRONT) and shuts off Sleep Bypass.
PROC_VCFRONT_X_12V-RESET
Model 3 / Y
Service procedures
2026 firmware
Start HV Battery Discharge
Gen3/tasks/PROC_VCFRONT_X_HV-DISCHARGE-START
What this task does
Starts discharging the High Voltage (HV) battery by producing waste heat in the Drive Units and rejecting that heat out the radiator. Automatically stops when the HV Battery State of Charge (SOC) max reaches the user-selected target SOC.
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
- Factory, DiagLinkActive, Service
Procedure notes
Pumps, fans, and Drive Unit(s) will start making noise to produce and expel heat.
Task inputs (2)
Default Target SOC Max
default_target_soc · String
Select the default target SOC max. Otherwise, select MANUAL_INPUT and enter the desired target SOC max below.
Firmware default: 25_PERCENT
Options: 25_PERCENT, 45_PERCENT, MANUAL_INPUT
Manual Input Target SOC Max
manual_target_soc · Int
If MANUAL_INPUT selected, enter the desired target SOC max.
Firmware default: 20
Model 3 / Y Intel · Firmware 2026.32.7
- Vehicle coverage
- Model Y, Pre-2024 Model 3
- Supported connection
- Local connection
- Vehicle state
- Stationary · Parked
- Gateway diagnostic level
- Factory, DiagLinkActive, Service
Procedure notes
Pumps, fans, and Drive Unit(s) will start making noise to produce and expel heat.
Task inputs (2)
Default Target SOC Max
default_target_soc · String
Select the default target SOC max. Otherwise, select MANUAL_INPUT and enter the desired target SOC max below.
Firmware default: 25_PERCENT
Options: 25_PERCENT, 45_PERCENT, MANUAL_INPUT
Manual Input Target SOC Max
manual_target_soc · Int
If MANUAL_INPUT selected, enter the desired target SOC max.
Firmware default: 20
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 · Parked
- Gateway diagnostic level
- Factory, DiagLinkActive, Service
Procedure notes
Pumps, fans, and Drive Unit(s) will start making noise to produce and expel heat.
Task inputs (2)
Default Target SOC Max
default_target_soc · String
Select the default target SOC max. Otherwise, select MANUAL_INPUT and enter the desired target SOC max below.
Firmware default: 25_PERCENT
Options: 25_PERCENT, 45_PERCENT, MANUAL_INPUT
Manual Input Target SOC Max
manual_target_soc · Int
If MANUAL_INPUT selected, enter the desired target SOC max.
Firmware default: 20
Related service tasks
Browse all tasks →
Self-tests
Active Louver Self Test
Performs louver connection check. Will only move the louver through partial range of motion.
TEST-SELF_VCFRONT_X_ACTIVE-LOUVER
Model 3 / Y
Service procedures
Allow High Beam Enablement in Factory Mode
Allows high beams to be enabled in Factory Mode until the Front Vehicle Controller (VCFRONT) ECU is power cycled.
PROC_VCFRONT_X_ALLOW-HIGH-BEAMS-FACTORY
Model S / X (2021+)
Self-tests
Ambient Sensor Test
Tests for power, connection, and communication of the ambient sensor controlled by the Front Vehicle Controller (VCFRONT).
TEST-SELF_VCFRONT_X_AMBIENT-TEMP
Model 3 / Y
Model S / X (2021+)