2008 Toyota Tundra Owners Manual - Page 423

07 11.20 "A/C" button To turn on the air conditioning, press the "A/C" button. The "A/C" button indicator will come on. To turn the air conditioning off, press the button again. If the "A/C" button indicator flashes, there is a problem in the air conditioning system and the air conditioning automatically shuts off. If this happens, take your vehicle to a Toyota dealer for service. 393 2008 TUNDRA from Apr. '08 Prod. (OM34477U)