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Diagnostic tests

Trailer Light Controller (TLC) - Test If Connected

Model3/tasks/TEST_VCLEFT-TLC_REAR_TRAILER-CONTROLLER-CONNECTED

Model 3 / Y

What this task does

Tests whether the Trailer Light Controller (TLC) load is connected to the left vehicle controller (VCLEFT) ECU.

Vehicle compatibility

Select your vehicle’s hardware to see task details, requirements, and inputs. Availability is confirmed after connection.

Model 3 / Y AMD
Vehicle coverage
2024+ Model 3, 2025+ Model Y, Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Parked
Gateway diagnostic level
No specific level listed

Task inputs (0)

This task has no listed user inputs.

Model 3 / Y Intel
Vehicle coverage
Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Parked
Gateway diagnostic level
No specific level listed

Task inputs (0)

This task has no listed user inputs.

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Diagnostic tests

Trailer Light Controller (TLC) LIN Communication Test

Tests communication of the Trailer Light Controller (TLC) Electronic Control Unit (ECU). Communication is established over the Local Interconnect Network (LIN) bus network.

TEST_VCLEFT-TLC_REAR_TRAILER-LIN-COMM

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