2007 Lexus LS 460 Owners Manual - Page 601

5-2. Steps to take in an emergency n Tire pressure warning light At the same time that the tire pressure warning light comes on, the tire pressure values appear on the multi-information display. n If the tire pressure warning system is inoperative The tire pressure warning system may become inoperative in the following conditions: (When the condition becomes normal, the system will work properly.) l If tires not equipped with tire pressure warning valves and transmitters are used. l If the ID code on the tire pressure warning valves and transmitters is not regis- tered. l If electronic devices or facilities using similar radio wave frequencies are nearby. l If a large metallic object which can interfere with signal reception is put in the trunk. l If a radio set at similar frequencies is in use in the vehicle. l If a window tint that affects the radio wave signals is installed. l If there is a lot of snow or ice on the vehicle, in particular around the wheels or wheel housings. l If non-genuine Lexus wheels are used. l If tire chains are used. l If the spare tire is in a location subject to poor radio wave signal reception. l If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher. n If the tire pressure warning light comes on after blinking for 1 minute frequently 5 When trouble arises If the tire pressure warning light comes on after blinking for 1 minute frequently when the engine switch is turned to IG-ON mode, have it checked by your Lexus dealer. Even if you use genuine wheels, the tire pressure warning system may not work properly with some types of tires. Pushing the tire pressure reset switch should not turn off the tire pressure warning light. n Customization The vehicle speed linked seat belt reminder buzzer can be disabled. (→P. 627) 575