The service task reference · 2026
Find the procedure. Understand what it does.
Explore diagnostic tests and repair tasks you can run with Tesware on compatible vehicles.
1,357
service tasks
2026 firmware
Model 3, Y, S & X
1,357 tasks Showing 577–600
Browse by name, A–Z
The test reads and reports serial or part number of the High Voltage Battery Management System (HVBMS).
TEST-SN_HVBMS
Resets the High Voltage Battery Management System (HVBMS).
TEST-RESET_HVBMS
This routine creates a backup copy of High Voltage Controller (HVC) data and saves it onto the car computer. The backup data is needed when performing an HVC ECU Restore.
PROC_HVC_X_ECU-REPLACEMENT-BACKUP
This routine writes the most recently saved High Voltage Controller (HVC) ECU backup data on the car computer to the newly installed HVC. During the routine, two CAN ECU redeploys will occur which is expected. The entire procedure will take approximately 15-20 minutes to complete. See Toolbox Article 6523500 for more specific details. Requirements: - New compatible HVC is installed (See Toolbox Article 6569500) - LV battery is supported by a LV maintainer - First responder loop is connected - Every connection within the ancillary bay is made
PROC_HVC_X_ECU-REPLACEMENT-RESTORE
Diagnoses an issue between the High Voltage Processor (HVP) and Power Conversion System (PCS). Enables wiring interface by toggling the DCDC, CHG, and PCS enable lines between the HVP and PCS. If the PCS, HVP, and/or Battery Management System (BMS) are absent, all three lines will report a failure.
TEST-SELF_HVP_X_PCS-INTERFACE
This routine will test if the High Voltage Processor (HVP) is communicating over CAN. Note that if the High Voltage Battery Management System (HVBMS) is MIA, this routine may falsely fail since the HVBMS forwards all HVS components status' to the Gateway.
PING-TP_HVP
This routine performs a self test of the HVP charge port (CP) interface.
TEST-SELF_HVP_X_CP-INTERFACE
This routine will check the integrity of the emergency notification signal (ENS) line between the HVP and RCM.
TEST-SELF_HVP_X_ENS
Checks if the High Voltage Processor (HVP) is receiving sufficient Low Voltage (LV) input and contactor power.
TEST-SELF_HVP_X_LV-POWER
The test reads and reports serial or part number of the High Voltage Processor (HVP).
TEST-SN_HVP
Resets the High Voltage Processor (HVP).
TEST-RESET_HVP
Check pedal resting position within tolerance and learn VIN
PROC_IBST_X_IBST-PEDAL
Clears the Diagnostic Trouble Codes (DTC) in the iBooster (IBST) Electronic Control Unit (ECU).
PROC_IBST_X_CLEAR-DTCS
Tests communication with the iBooster (IBST) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).
PING-TP_IBST
Tests the communication of the iBooster (IBST) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the chassis Controller Area Network (CAN).
PING-TP_IBST
Tests the communication of the iBooster (IBST) Electronic Control Unit (ECU). Communication is established over the Party Controller Area Network (CAN).
PING-DTC_IBST_X_PARTY
Measures the brake system stiffness of burnished brakes and tests the brake pedal switch. Stiffness threshold is selected based on chassis and brake hardware type.
TEST_BRAKE_X_STIFFNESS-TEST-PRESSURE-BURNISHED
Measures the brake system stiffness. Select burnished or unburnished to determine the pass/fail threshold. Stiffness threshold is selected based on chassis and brake hardware type. Stiffness by wheel circuit is also measured, but not used for pass/fail.
TEST_BRAKE_X_STIFFNESS-TEST-SERVICE
Runs brake stiffness individually for all wheels, and pass/fails on a threshold of pressure discrepancy, pressure value, or dead travel stroke. If executing with DIAG_LINK_ACTIVE then EPBs will release one at a time, which is required if check_swapped_rear_lines is true.
TEST-BRAKE_ALL_STIFFNESS-PRESSURE-DELTA
Verifies the brake hydraulic system stiffness. The pressure leakage threshold should be left blank for five seconds.
TEST_BRAKE_X_STIFFNESS-TEST-PRESSURE-BURNISHED
Tests for power and connection of the iBooster (IBST) travel sensor.
TEST-IBST_X_L_TRAVEL-SENSOR
Resets the iBooster (IBST) Electronic Control Unit (ECU). Reset is executed via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).
TEST-RESET_IBST
Tests communication with the IC Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).
PING-TP_IC
The enter Autopilot Retrofit Mode procedure allows for internet communication on Hardware 3 (HW3) Autopilot electronic control units (ECUs).
PROC_ICE_X_ENTER-RETROFIT-MODE
Descriptions and input definitions come from Tesla’s 2026 vehicle firmware. This catalog includes tasks covered by Tesware’s current service access. Each task page lists the vehicle and firmware versions in which it was found. The connected vehicle confirms whether a task can run.
Cybertruck is not included in this 2026 reference.