The function is automatically activated each time the engine is started.
The function can alert drivers of following vehicles of the risk of a collision by rapidly flashing the turn signals.
If, at a speed below 30 km/h (20 mph), the function detects that the vehicle is in danger of being hit from behind, the seatbelt tensioners may tension the front seat belts and activate the Whiplash Protection System safety system.
Immediately before a collision from behind, the function may also activate the brakes in order to reduce the forward acceleration of the vehicle during the collision. However, the brakes will only be applied if your vehicle is stationary. The brakes will be immediately released if the accelerator pedal is depressed.