It integrates control of multiple systems so you can tune the performance of the IS to suit your driving style. Selecting Eco Mode changes the engine output, throttle control and air conditioning characteristics required for fuel-efficient eco-driving. Sport/Sport S Mode refines the powertrain settings and amount of EPS (Electric Power Steering) steering assist for excellent acceleration and sports steering feel. In addition, Sport S+ Mode refines the powertrain and chassis settings for dynamic sports driving.