2013 Toyota Tundra Double Cab Owners Manual - Page 191
2013 Toyota Tundra Double Cab Manual
Page 191 highlights
2 -4 . U sing ot he r driving syst e m s I nt uit ive pa rk ing a ssist ∗ The intuitive parking assist is designed to inform you of the approximate distance between your vehicle and an obstruction by indicator and buzzer when parking the vehicle. This system uses sensors to detect obstructions.