2004 Toyota Sienna Owners Manual - Page 183

04 SIENNA_U (L/O 0408) When the traction control system is operating, the following conditions occur: D The system controls the spinning of the front wheels. At this time, the slip indicator light blinks. D You may feel vibration or noise in your vehicle, caused by operation of the brakes. This indicates the system is functioning properly. The slip indicator light comes on for a few seconds when the ignition key is turned to "ON". If the indicator light does not come on when the ignition is turned on, contact your Toyota dealer. NORMAL DRIVING MODE Leave the system on during the ordinary driving so that it can operate when needed. You may hear a sound in the engine compartment for a few seconds just after the vehicle begins to move. This means that the traction control system is in the self −check mode, but does not indicate a malfunction. TRACTION CONTROL OFF MODE If your wheels get stuck in a ditch when you are driving on a severe off road and sand, turn off the traction control system. This system that controls engine performance interferes with the process of freeing your wheels. To turn off: Push "TRAC OFF" switch. The "TRAC OFF" indicator light will come on. The vehicle stability control system is always activated, even if the traction control system is turned off. To turn on: Push "TRAC OFF" switch once again. The "TRAC OFF" indicator light will go off. 183 2004 SIENNA from Aug. '04 Prod. (OM45422U)