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Service procedures 2026 firmware

Front Drive Unit Resolver Error Learning

Gen3/tasks/PROC_DIF_X_RESOLVER-ERROR-LEARN

Model 3 / YModel S / X (2021+)

What this task does

Calibrates the resolver analog input error, which is required after an inverter swap. Before running this routine, confirm the steering wheel is straight and the drive rail is on. Run this routine while the vehicle is on the lift. After starting the routine, follow these steps to complete inverter replacement: 1. Shift into Drive within 10 seconds of starting the routine, and firmly press the accelerator pedal. 2. Keep the accelerator pedal pressed until the motor starts slowing down on its own. 3. Press the brake and shift into Park after the speedometer reaches 0. Do not press the brake pedal during coast down. Brake softly to cancel 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 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; Stationary · Neutral
Gateway diagnostic level
Service, DiagLinkActive, Factory

Procedure notes

Axles and wheels will spin while in Drive.

Task inputs (1)

PlatformUseBrakeType

PlatformUseBrakeType

Firmware default: {"default":{"value":true},"type":"networks.PlatformSpecificDefaultInput"}

Model 3 / Y Intel · Firmware 2026.32.7
Vehicle coverage
Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Parked; Stationary · Neutral
Gateway diagnostic level
Service, DiagLinkActive, Factory

Procedure notes

Axles and wheels will spin while in Drive.

Task inputs (1)

PlatformUseBrakeType

PlatformUseBrakeType

Firmware default: {"default":{"value":true},"type":"networks.PlatformSpecificDefaultInput"}

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
Service, DiagLinkActive, Factory

Procedure notes

Axles and wheels will spin while in Drive.

Task inputs (1)

PlatformUseBrakeType

PlatformUseBrakeType

Firmware default: {"default":{"value":true},"type":"networks.PlatformSpecificDefaultInput"}

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Service procedures

DIF Application Data Restore

Performs a Drive Inverter Front (DIF) restore from the latest application data backup saved onto the car computer. This should only be run after the restore bootloader data routine. Requirements: - New compatible drive inverter is installed. - DIF Bootloader Data Restore routine passed successfully. - DIF software is updated.

PROC_DIF_X_ECU-REPLACEMENT-RESTORE-APP

Model 3 / Y Model S / X (2021+)
Service procedures

DIF Bootloader and Application Data Store

Saves the bootloader and application data backup snapshot from the Drive Inverter Front (DIF) on the car computer. The backup data is needed when performing a drive inverter replacement.

PROC_DIF_X_ECU-REPLACEMENT-STORE

Model 3 / Y Model S / X (2021+)
Service procedures

DIF Bootloader Data Restore

Sets the usage ID for the Front Drive Inverter (DIF) and restores the bootloader data from the last backup saved onto the car computer. Requirements: - New compatible drive inverter is installed.

PROC_DIF_X_ECU-REPLACEMENT-RESTORE-BOOT

Model 3 / Y Model S / X (2021+)
Communication checks

DIF CAN Communication

Checks the communication of the Front Drive Inverter (DIF) Electronic Control Unit (ECU). Communication is established through Unified Diagnostics Services (UDS) over the Controller Area Network (CAN). When communication is established, the test will succeed. If the test fails, inspect the wiring and confirm the ECU is powered.

PING-TP_DIF

Model 3 / Y Model S / X (2021+)