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Self-tests 2026 firmware

Test Front Left Fog Light and Side Marker Connection

Coriander/tasks/TEST-SELF_VCBATT_FRONT-L_FOG-SIDE-MARKER

Model S / X (2021+)

What this task does

Tests the electrical connectivity of front left fascia lights, including the fog light and side marker light. This routine activates each light and monitors current draw to verify proper electrical connection.

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
No specific level listed

Procedure notes

The front left fog light and side marker light will turn on briefly during the test.

Task inputs (0)

No user inputs are listed in this firmware.

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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+)
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+)