Skip to content
Diagnostic tests 2026 firmware

Model X Trailer Detection test

ModelX/tasks/TEST_BCREAR_X_TRAILER-DETECTION-WARNING

Model S / X (legacy)

What this task does

This test will automatically pass if the BCREAR ECU does not detect a trailer or other fault.

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 X
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
No specific level listed

Task inputs (0)

No user inputs are listed in this firmware.

Related service tasks

Browse all tasks →
Communication checks

BCREAR CAN Communication

Tests communication with the Body Controller - Rear (BCREAR) Electronic Control Unit (ECU). Communication is established via Unified Diagnostics Services (UDS) over the Controller Area Network (CAN).

PING-TP_BCREAR

Model S / X (legacy)
Service procedures

Lift Gate Anti-Pinch Test (Left)

Tests the left side anti-pinch functionality on the lift gate by monitoring the BCREAR_plgLeftAndMidPinchStatus CAN signal.

PROC_BCREAR_L_LFT-ANTI-PINCH-LEFT

Model S / X (legacy)
Service procedures

Lift Gate Anti-Pinch Test (Right)

Tests the right side anti-pinch functionality on the lift gate by monitoring the BCREAR_plgRightPinchStatus CAN signal.

PROC_BCREAR_R_LFT-ANTI-PINCH-RIGHT

Model S / X (legacy)
Diagnostic tests

Liftgate Anti-Pinch Connection Test

This test will run a routine on the BCREAR that will report whether the Power Liftgate (PLG) anti-pinch strips are disconnected. This test can only detect over all disconnection and will not be able to check if sections of the pinch strip are faulty.

TEST_BCREAR_REAR_LFT-ANTI-PINCH-CONNECTION-TEST

Model S / X (legacy)