2011 Toyota Prius Owners Manual - Page 279

2 -4 . U sing ot he r driving syst e m s Driving a ssist syst e m s To help enhance driving safety and performance, the following systems operate automatically in response to various driving situations. Be aware, however, that these systems are supplementary and should not be relied upon too heavily when operating the vehicle. n ABS (Anti-lock Brake System) Helps to prevent wheel lock when the brakes are applied suddenly, or if the brakes are applied while driving on a slippery road surface. n Brake assist Generates an increased level of braking force after the brake pedal is depressed, when the system detects a panic stop situation. 2 When driving n VSC (Vehicle Stability Control) Helps the driver to control skidding when swerving suddenly or turning on slippery road surfaces. n TRAC (Traction Control) Helps to maintain drive power and prevent the drive wheels from spinning when starting the vehicle or accelerating on slippery roads. n Hill-start assist control →P. 251 n EPS (Electric Power Steering) Employs an electric motor to reduce the amount of effort needed to turn the steering wheel. n Pre-Collision System (if equipped) →P. 257 n Enhanced VSC (Enhanced Vehicle Stability Control) Provides cooperative control of the ABS, TRAC, VSC and EPS. Helps to maintain directional stability when swerving on slippery road surface by controlling steering performance. 253 PRIUS_U (OM47685U) DVD