2009 Toyota Prius Owners Manual - Page 458

OM47614U_PRIUS_U.book Page 432 Monday, January 11, 2010 11:02 AM 5-2. Steps to take in an emergency The tire pressure warning system may be disabled in the following conditions: (When the condition becomes normal, the system will work properly.) l If electronic devices or facilities using similar radio wave frequencies are nearby. 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 Toyota wheels are used (Even if you use Toyota wheels, the tire pressure warning system may not work properly with some types of tires.). l If tire chains are used. n If the tire pressure warning light comes on after blinking for 1 minute frequently If the tire pressure warning light comes on after blinking for 1 minute frequently when the "POWER" switch is turned to ON mode, have it checked by your Toyota dealer. 432 PRIUS_U_(OM47614U)