2012 Toyota Prius Owners Manual - Page 606
2012 Toyota Prius Manual
Page 606 highlights
2 -4 . U sing ot he r driving syst e m s PCS (Pre -Collision Syst e m ) ∗ When the radar sensor detects possibility of a frontal collision, the pre-collision systems such as the brakes and seat belts are automatically engaged to lessen impact as well as vehicle damage.
We apologize, but we cannot currently deliver this PDF manual by request of the manufacturer.
We apologize for any inconveniece.