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Service procedures 2026 firmware

EPB - Enter Service Mode

ModelSX/tasks/PROC_EPB_X_SERVICE-MODE

What this task does

Starts or stops Service Mode on either one or both Electronic Parking Brakes (EPB). Service Mode fully retracts the caliper piston. For this routine to run successfully, the brake pedal must be pressed to enter Service Mode. To stop EPB Service Mode, run this routine again with 'STOP' or apply the Parking brake or handbrake.

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 (legacy) Legacy infotainment · Firmware 2026.14.6
Vehicle coverage
Pre-2021 Model S, Pre-2021 Model X
Supported connection
Local connection
Vehicle state
Stationary · Parked; Stationary · Neutral
Gateway diagnostic level
Factory, Service, ServiceDrive

Procedure notes

The vehicle might free roll when releasing the brake pedal.

Task inputs (1)

Action_Type

ActionType · String

Start or stop service mode of both park brake calipers

Firmware default: START

Options: START, STOP

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Communication checks

EPB CAN Communication

Tests communication with the Electronic Parking Brake (EPB) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).

PING-TP_EPB

Model S / X (legacy)
Service procedures

EPB Configuration

This test would clear the brake caliper type stored in EPB, so that it can learn the next configuration the gateway sends.

PROC_EPB_X_CONFIG

Model S / X (legacy)
Service procedures

EPB Enter Service Mode

Enable EPB Service Mode by running the SERVICE_MODE UDS routine on both the EPB and EPBM ECUs. This will fully retract the EPB caliper piston. In order for this routine to be run successfully, the gateway must be unlocked and the brake pedal must be pressed during the execution. WARNING The vehicle may free roll when releasing the brake pedal !!! To exit EPB Service Mode, apply the Park brake or Handbrake.

PROC_EPB_X_SERVICE-MODE-START

Model S / X (legacy)