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Service procedures 2026 firmware

Restore Rear Left Drive Inverter Bootloader Data after Replacement and Usage ID Configuration

Coriander/tasks/PROC_PMREL_X_RESTORE-DATA-BOOT-AND-WRITE-DRIVE-TYPE

Model S / X (2021+)

What this task does

Restores the Rear Left Drive Inverter (PMREL) bootloader data and configures Usage ID after a DIR Left replacement. Press the brake pedal to turn on drive rail before starting the routine.

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 · Parked; Stationary · Neutral
Gateway diagnostic level
No specific level listed

Procedure notes

Once completed successfully this procedure might fail if ran multiple times afterwards.

Task inputs (1)

InverterReplacementPrompt

InverterReplacementPrompt · String

Firmware default: To confirm an INVERTER replacement (not drive unit), replace this text with YES

Related service tasks

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Service procedures

Drive Inverter Rear Left (DIREL) - Restore Bootloader Data After Replacement

Restores the Drive Inverter Rear Left (DIREL) bootloader data from the most recent backup on the car computer and configures the Usage ID after a DIREL replacement. Run this routine only after a new compatible drive inverter is installed. After successfully completing, this procedure fails if run multiple times.

PROC_PMREL_X_LEGACY-RESTORE-ENTRYPOINT

Model S / X (2021+)
Communication checks

Propulsion Monitor Rear Left CAN Communication

Tests communication with the Propulsion Monitor Rear Left (PMREL) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).

PING-TP_PMREL

Model S / X (2021+)