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 1273–1296
Browse by name, A–Z
Tests the connectivity and signal strength of the Ultra High Frequency (UHF) charge port antenna on the Model X located in the grid of the rear liftgate glass. The antenna will detect a signal from a standard UHF transmitter, but the transmitter is not sending a request to Open the charge port door, so the charge port is not required to respond by opening.
TEST_BCCEN_X_UHF-CHARGE-PORT
This routine will update the Gateway pack config to match what the BMS is reporting.
PROC_CID_X_WRITE-GTW-PACK-CONFIG
Before running this routine, ensure the target updater is awake. Checks the status directly on an updater. This returns firmware package data including signatures, fail counts, fuse state, and more.
TEST-BASH_ICE_X_UPDATER-STATUS
Tests connection and harness of the rear exterior lights controlled by the Right Vehicle Controller (VCRIGHT) Electronic Control Unit (ECU), excluding the fascia light.
TEST-SELF_VCRIGHT_REAR_LIGHTS-V3
Tests connection and harness of the rear fascia lights controlled by the Right Vehicle Controller (VCRIGHT) Electronic Control Unit (ECU).
TEST-SELF_VCRIGHT_REAR_FASCIA-LIGHTS
This self test checks that left liftgate brake light and left liftgate turn light are properly installed by checking that current draw is detected when endpoints are commanded on
TEST-SELF_VCLEFT_REAR-L_LIFTGATE-LIGHTS
This self test checks that the left brake, tail, turn, and reverse light endpoints are properly installed by checking that current draw is detected when endpoints are commanded on
TEST-SELF_VCLEFT_REAR-L_LIGHTS-V2
This self test checks that rear fascia exterior lights (turn signals, tail lights, reverse lights, and rear fog lights) are properly installed by checking that current draw is detected when endpoints are commanded on
TEST-SELF_VCRIGHT_REAR_FASCIA-LIGHTS-V2
This self test checks that right liftgate brake light, right liftgate turn light, left+right liftgate tail lights, license plate lights, and center high mount stop light are properly installed by checking that current draw is detected when endpoints are commanded on
TEST-SELF_VCRIGHT_REAR-R_LIGHTS
This self test checks that the right brake, tail, turn, reverse, rear fog, and license plate light endpoints are properly installed by checking that current draw is detected when endpoints are commanded on
TEST-SELF_VCRIGHT_REAR-R_LIGHTS-V2
Requests an upload of the logged CAN data between the specified start and end time.
PROC_ICE_X_LOGS-UPLOADER
Perform USB check.
TEST-BASH_CID_X_USB
Lists the files on a plugged-in USB device. While the display is off, external devices may not be mounted.
TEST-BASH_ICE_X_LSUSB
Checks if the USB hub is powered and connected.
PING-BASH_USB
The test checks USB devices in glovebox.
TEST-BASH_CID_X_USB3-GLOVEBOX
Tests the connectivity of the Ultrasonic Sensors (USS) in the front fascia.
TEST-SELF_PARK_FRONT_FASCIA-USS
Tests the communication of the Ultrasonic Sensors (USS) over the party CAN bus.
TEST-SELF_PARK_X_CAN-TESLA-USS
Tests the connectivity of the Ultrasonic Sensors (USS) in the rear fascia.
TEST-SELF_PARK_REAR_FASCIA-USS
Tests the Controller Area Network (CAN) communication of VCBATT with VCFRONT.
TEST-SELF_VCBATT_X_CAN
The test resets the Low Voltage Battery Vehicle Controller (VCBATT) ECU via UDS.
TEST-RESET_VCBATT
The test resets the Low Voltage Battery Vehicle Controller (VCBATT) ECU via UDS.
TEST-RESET_VCBATT
The self-test checks Front Vehicle Controller (VCFRONT) ECU communication with party Controller Area Network (CAN) bus.
TEST-SELF_VCFRONT_X_CAN
Tests the communication with the front vehicle controller (VCFRONT) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN). When communication is established, the test will succeed. If the test fails, inspect wiring and ensure ECU is powered.
PING-TP_VCFRONT
Tests for power, connection, and communication of the temperature sensor of the battery coolant controlled by the Front Vehicle Controller (VCFRONT).
TEST-SELF_VCFRONT_X_COOLANT-TEMP-BATTERY
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.