2003 Lexus LS 430 Owners Manual - Page 205

AIR CONDITIONING If manual switching of air intake is desired − Each time you push the air intake control button, the mode changes in order from the RECIRCULATED AIR mode to AUTOMATIC mode to OUTSIDE AIR mode, then back to the RECIRCULATED AIR mode. Each indicator light shows which mode is now selected. 1 RECIRCULATED mode − If quick circulation of cooled air is desired, select this mode. EXHAUST GAS AUTOMATIC mode − If the outside air contains harmful substances like exhaust gas (i.e., when the vehicle running just in front of your vehicle accelerates rapidly), the system changes automatically from the OUTSIDE AIR mode (with indicators 2 and 3 on) to the RECIRCULATED mode (with indicators 1 and 2 on). If you use the EXHAUST GAS AUTOMATIC mode and the air purifier automatic mode at the same time, air purifying effect will be enhanced (If equipped). OUTSIDE AIR mode − The system will take fresh outside air into the vehicle. 21L156 2 "Without rear air conditioning and air purifier 3 21L060a Turning off the air conditioning manually will cancel the EXHAUST GAS AUTOMATIC mode. If you select the "AUTO" mode during fan operating, the air conditioning turns on and the EXHAUST GAS AUTOMATIC mode will operate. For normal use, it is best to keep the air intake control button set to OUTSIDE AIR mode. If recirculated air is used during heating, the windows will fog up more easily. "With rear air conditioning and air purifier To change the sensitivity of the sensor switching between the RECIRCULATED and OUTSIDE AIR in the AUTOMATIC mode, push the air intake control button until you hear a beep. The display changes as illustrated below. 191