2008 Toyota Tundra Owners Manual - Page 415

07 11.20 If the ambient temperature drops, the air intake mode will automatically change from RECIRCULATE to FRESH after a few minutes. This automatic change control mode can be cancelled by pushing and holding the button for longer than 2 seconds. The automatic change control mode will be reactivated if the engine switch is turned to the "LOCK" or "ACC" position. "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. 385 2008 TUNDRA from Apr. '08 Prod. (OM34477U)