WAS DRIVING DOWN MAJOR INTERSTATE WHEN THE VSC WARNING CAME ON WITH BUZZER. BRAKES FELT LIKE THEY WERE BEING GROUND DOWN, ENGINE DECELERATED, AND COULD FEEL BUMPING AND GRINDING ON BRAKE PEDAL. PULLED OVER AND CHECKED UNDER CAR, FOUND NOTHING. GOT BACK ON INTERSTATE AND SAME THING HAPPENED ONLY THIS TIME THE SYSTEM TURNED ITSELF OFF. CAN NOT TURN THE VSC OFF WITH THE BUTTON PROVIDED. RESEARCH ON INTERNET REVEALS NOT AN UNIQUE ISSUE WITH SEQUOIA. HAS ALSO HAPPENED WITH TUNDRA AND OTHER TOYOTAS WITH VSC SYSTEM. NO FIX AVAILABLE AS OF 09/30/2012 THAT CAN BE FOUND. *TR