2011 Toyota Prius Owners Manual - Page 283

2 -4 . U sing ot he r driving syst e m s Pre -Collision Syst e m ∗ When the radar sensor detects possibility of a frontal collision, the pre-collision system such as the brakes and seat belts are automatically engaged to lessen impact and injuries to occupants as well as vehicle damage. n Pre-collision seat belts If the pre-collision sensor detects that a collision is unavoidable, the pre-collision system will retract the seat belt before the collision occurs. The same will happen if the driver makes an emergency braking or loses control of the vehicle. (→P. 86) However, when the VSC is disabled, the system will not operate in the event of skidding. n Pre-collision brake assist When there is a high possibility of a frontal collision, the system applies greater braking force in relation to how strongly the brake pedal is depressed. n Pre-collision braking When there is a high possibility of a frontal collision, the system warns the driver using a warning light, warning display and buzzer. If the system determines that a collision is unavoidable, the brakes are automatically applied to reduce the collision speed. Pre-collision braking can be disabled using the pre-collision braking off switch. 2 When driving ∗: If equipped 257 PRIUS_U (OM47685U) DVD