2006 Lexus GS 300 Owners Manual - Page 1090

STARTING AND DRIVING If the tire pressure warning light blinks...D If a window tint that affects the radio wave signals is installed. D If the tire pressure warning select switch is set to a different tire setting. G31048 D If there is a lot of snow or ice on the vehicle, in particular around the wheels or wheel housings. D If non−genuine Lexus wheels are used. D If tire chains are used. D If the tire inflation pressure is more than 500 kPa (5.1 kgf/cm2 or bar, 73 psi). If the tire pressure warning light blinks when the engine switch "IG −ON" mode is selected, the tire pressure warning system is not working properly. The system will be disabled in the following conditions: (When the condition becomes normal, the system will work properly.) D If tires not equipped with tire pressure warning valves and transmitters are used. D If the ID code on the tire pressure warning valves and transmitters is not registered. D If electronic devices or facilities using similar radio wave frequencies are nearby. D If a radio set at similar frequencies is in use in the vehicle. If the tire pressure warning light blinks frequently when the engine switch "IG−ON" mode is selected, 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 warning reset switch should not turn off the tire pressure warning light. 444