2011 Toyota Yaris Owners Manual - Page 178

2-4. Using other driving systems n Automatic reactivation of TRAC and VSC Turning the engine switch OFF after turning off the TRAC and VSC systems will automatically re-enable them. n Automatic TRAC reactivation If only the TRAC system is turned off, the TRAC system will turn on when vehicle speed increases. n Automatic TRAC and VSC reactivation If the TRAC and VSC systems are turned off, the systems will not turn on even when vehicle speed increases. n If the slip indicator light up There is a malfunction in the TRAC and VSC systems. Contact your Toyota dealer and have your Toyota inspected. n EPS operation sound When the steering wheel operates, a motor sound (whirring sound) may be heard. This does not indicate a malfunction. n Reduced effectiveness of EPS The effectiveness of EPS is reduced to prevent the system from overheating when there is frequent steering input over an extended period of time. The steering wheel may feel heavy as a result. Should this occur, refrain from excessive steering input or stop the vehicle and turn the engine off. The system should return to normal within 10 minutes. 144