2004 Toyota Sienna Owners Manual - Page 186

04 SIENNA_U (L/O 0408) Vehicle stability control system In the following cases, contact your Toyota dealer: The vehicle stability control system helps provide integrated control of the systems such as an anti −lock brake system, brake assist system, traction control, engine control, etc. This system automatically controls the brakes and engine to help prevent the vehicle from skidding when cornering on a slippery road surface or operating steering wheel abruptly. This system activates when the vehicle speed is about more than 15 km/h (9 mph). "VSC" warning light This light warns that there is a problem somewhere in the traction control system or the vehicle stability control system. The light will come on when the ignition key is turned to "ON" and will go off after a few seconds. If the light comes on while driving, the system does not work. However, as conventional braking operates when applied, there is no problem to continue your driving. You may hear a sound in the engine compartment for a few seconds just after the vehicle begins to move. This means that the system is in the self −check mode, but does not indicate a malfunction. D The warning light does not come on after the ignition key is turned to "ON". D The warning light remains on after the ignition key is turned to "ON". D The warning light comes on while driving. 186 2004 SIENNA from Aug. '04 Prod. (OM45422U)