2014 model year RX 350 and RX 450h vehicles are equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (except the spare tire) has a tire pressure warning valve/sensor that measures tire pressure data. 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 for Japan-built vehicles by following the activation procedure in this bulletin. NAP-built vehicles do NOT require activation, but both Japan-built (VINs start with ?J?) and NAP-built (VINs start with ?2?) vehicles require the TPWS to be initialized by following the initialization procedure in this bulletin.
