2007 Lexus GS 350 Owners Manual - Page 467

4-3. Do-it-yourself maintenance Registering and selecting ID codes n Registering ID codes 2 sets of tire pressure warning valve and transmitter ID codes can be registered. Once a second set of tires is registered at "2nd", you can switch between tire set settings simply by pressing the tire pressure warning select switch. There are 2 settings: "MAIN" position: The ID code of the tire pressure warning valve and transmitter on the tires originally installed on the vehicle is registered. "2nd" position: The ID code is not registered. When you replace a new set of tires, purchase tire pressure warning valves and transmitters from your Lexus dealer and have the new ID code registered by your Lexus dealer. n Selecting ID codes When replacing tires, make sure to select the ID code set that matches the new tire set. If the tire pressure warning select switch is set to wrong tire setting, the tire pressure warning system will not operate properly. After about 20 minutes, the tire pressure warning light comes on after blinking for 1 minute to indicate a system malfunction. "MAIN" "2nd" 4 Maintenance and care 393