Trailer Sway Control
Trailer Sway Control (TSC) detects ‘snaking’ or trailer sway and reduces the vehicle speed to help solve the problem, making towing more controlled. The system slows the vehicle down by reducing the engine’s torque and gradually increasing the brake pressure on all wheels.
Trailer Sway Control is part of the Electronic Stability Control (ESC) system on some vehicles.
More information can be found here.