2007 Toyota 4Runner Owners Manual - Page 209

06 06.07 IF THE TIRE PRESSURE LIGHT BLINKS... WARNING D If tire chains are used. D If the spare tire is in a location subject to poor radio wave signal reception. CY16072 If the tire pressure warning light blinks when the ignition key is turned to the "ON" position, 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 the tire inflation pressure is more than 500 kPa (5 kgf/cm2 or bar, 70 psi) or higher than the specified level. If the tire pressure warning light continues to blink when the ignition key is turned to the "ON" position, have the system checked by your Toyota dealer. Even if you use genuine wheels, the tire pressure warning system may not work properly with some types of tires. D If tires not equipped with tire pressure Type A warning used. valves and transmitters are 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 nearby. wave frequencies are CY16071 D If a radio set at similar frequencies is in use in the vehicle. D If a window tint that affects the radio wave signals is installed. D If there is a lot of snow or ice on the vehicle, in particular around the wheels or wheel housings. Type B D If non−genuine Toyota wheels are used. 2007 4Runner from Aug. '06 Prod. (OM35866U) 193