TSB: 2017 MODEL YEAR GX 460 VEHICLES ARE EQUIPPED WITH A DIRECT-TYPE TIRE PRESSURE WARNING SYSTEM (TPWS). EACH TIRE (INCLUDING THE SPARE TIRE) HAS A TIRE PRESSURE WARNING VALVE/SENSOR THAT MEASURES TIRE PRESSURE. THE DATA IS TRANSMITTED TO THE TIRE PRESSURE WARNING SYSTEM ANTENNA/RECEIVER AND THEN TO THE TIRE PRESSURE WARNING SYSTEM ECU. DURING PRE-DELIVERY SERVICE (PDS), THE TIRE PRESSURE WARNING VALVES/SENSORS MUST BE ACTIVATED ACCORDING TO THE PROCEDURE IN THIS BULLETIN.