Trailer stability assist is operated as vehicle stability control system. Trailer stability assist system has an effort to stabilize the vehicle and trailer when the trailer sways or oscillates. There are various reasons making vehicle sway and oscillate. Almost case it happens at high speed however, if the trailer is affected by crosswinds, buffeting, and improper overloading, it may be a risk of swaying.

Factors of swaying such as:

• High speed

• Strong crosswinds

• Improper overloading

• Sudden controlling of steering wheel

• Uneven road

Trailer stability assist system continuously analyzes the vehicle and trailer instability. When the Trailer Stability Assist detects sway, the brakes are applied automatically on the wheels and the engine power is properly reduced to stabilize the vehicle. When the vehicle is stable from swaying, trailer stability assist system does not operate.