WITH NO WARNING ABS WILL LOCK UP AND CAUSE VAN TO VIOLENTLY SWERVE TO THE RIGHT WHILE DRIVING. SOMETIMES ONCE , OTHER TIMES SEVERAL TIMES IN A ROW. ONLY LASTS FOR A FEW SECONDS. BUT LONG ENOUGH TO CAUSE AN ACCIDENT. TERRIFYING TO LOOSE COMPLETE CONTROL OF YOUR VEHICLE UNTIL IT DECIDES TO GIVE YOU CONTROL AGAIN. SEVERAL TRIPS TO DIFFERENT TOYOTA DEALERS AS WELL NO LESS THAN 5 DIFFERENT MECHANICS AND NO ONE HAS ANY IDEA WHAT CAUSES IT. HOWEVER THE TOYOTA DEALERS WERE ALL VERY FAMILIAR WITH THE ISSUE BUT HAD NO IDEA HOW TO FIX IT. THIS HAS BEEN GOING ON FOR 18 MONTHS. THE INTERNET IS FULL OF PEOPLE TRYING TO SOLVE THE SAME ISSUE IN 2004-2010 TOYOTA'S IN ALL MODELS. PLEASE HELP!