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
Diagnostic tests
2026 firmware
Coolant Air Purge
Gen3/tasks/TEST_VCFRONT_X_THERMAL-COOLANT-AIR-PURGE-START
What this task does
Starts the Coolant Purge Routine by running all pumps at maximum speed and changing valve positions. The routine will run for several minutes and will return a PASS if the routine started successfully. Vehicle must be in PARK gear and gateway unlocked.
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 · Drive; Stationary · Neutral; Stationary · Parked; Stationary · Reverse
- Gateway diagnostic level
- No specific level listed
Procedure notes
In order to prevent pump air lock, do not allow coolant level to dip below MIN mark.
Task inputs (0)
No user inputs are listed in this firmware.
Model 3 / Y Intel · Firmware 2026.32.7
- Vehicle coverage
- Model Y, Pre-2024 Model 3
- Supported connection
- Local connection
- Vehicle state
- Stationary · Drive; Stationary · Neutral; Stationary · Parked; Stationary · Reverse
- Gateway diagnostic level
- No specific level listed
Procedure notes
In order to prevent pump air lock, do not allow coolant level to dip below MIN mark.
Task inputs (0)
No user inputs are listed in this firmware.
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
- No specific level listed
Procedure notes
In order to prevent pump air lock, do not allow coolant level to dip below MIN mark.
Task inputs (0)
No user inputs are listed in this firmware.
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+)