2007 Lexus IS 250 Owners Manual - Page 161

2-4. Using other driving systems Driving assist systems 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) Restrains the vehicle from slipping when driving on slick road surfaces or in the event of sudden braking. n BA (Brake Assist) Generates an increased level of braking force after the brake pedal is depressed, when the system detects a panic stop situation. n VSC (Vehicle Stability Control) Helps the driver to control skidding when swerving suddenly or turning on slippery road surfaces. n TRAC (Traction Control) Maintains drive power and prevents the rear wheels (2WD models) or all wheels (4WD models) from spinning when starting the vehicle or accelerating on slippery roads. n Hill-start assist control (vehicles with an automatic transmission) Prevents the vehicle from rolling backwards when starting on an incline or slippery slope. n EPS (Electric Power Steering) Employs an electric motor to reduce the amount of effort needed to turn the steering wheel. 148