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Self-tests 2026 firmware

Thermal System Performance Test

Gen3/tasks/TEST-SELF_VCFRONT_X_THERMAL-PERFORMANCE

Model 3 / YModel S / X (2021+)

What this task does

Tests the performance of the vehicle thermal system, the powertrain, and the HVAC heating and cooling. The resulting output is either a pass or fail. Tesla manufacturing uses this routine to certify the thermal system's performance.

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

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 · Parked
Gateway diagnostic level
No specific level listed

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 · Parked
Gateway diagnostic level
No specific level listed

Task inputs (0)

No user inputs are listed in this firmware.

Related service tasks

Browse all tasks →
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
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+)