2009 Lexus RX 350 Owners Manual - Page 329

4-3. Do-it-yourself maintenance Installing tire pressure warning valves and transmitters When replacing tires or wheels, tire pressure warning valves and transmitters must also be installed. When new tire pressure warning valves and transmitters are installed, new tire pressure warning valve and transmitter ID codes must be registered in the tire pressure warning computer and tire pressure warning system must be initialized. Have tire pressure warning valve and transmitter ID codes registered by your Lexus dealer. (→P. 334) Initializing the tire pressure warning system n The tire pressure warning system must be initialized in the following circumstances: l When changing the tire inflation pressure by changing traveling speed or load weight, etc. l When changing the tire size. When the tire pressure warning system is initialized, the current tire inflation pressure is set as the pressure benchmark. n How to initialize the tire pressure warning system STEP 1 Park the vehicle in safe place and turn the engine switch OFF. While the vehicle is moving, initialization is not performed. STEP 2 4 Maintenance and care Adjust the tire pressure to the specified cold tire inflation pressure level. (→P. 430) Make sure to adjust the tire pressure to the specified cold tire inflation pressure level. The tire pressure warning system will operate based on this pressure level. STEP 3 Turn the engine switch to the ON position. 333