2009 Toyota Corolla Owners Manual - Page 413

2-4. Using other driving systems n Sounds and vibrations caused by ABS, brake assist, VSC and TRAC l A sound may be heard from the engine compartment when the engine is started or just after the vehicle begins to move. This sound does not indicate that a malfunction has occurred in any of these systems. l Any of the following conditions may occur when the above systems are operating. None of these indicates that a malfunction has occurred Vibrations may be felt through the vehicle body and steering. A motor sound may be heard after the vehicle comes to a stop. The brake pedal may pulsate slightly after ABS is activated. The brake pedal may move down slightly after ABS is activated. n If the "VSC OFF" indicator light flashes 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. CAUTION n ABS does not operate effectively when l Tires with inadequate gripping ability are used (such as excessively worn tires on a snow covered road). l The vehicle hydroplanes while driving at high speed on the wet or slick road. 160