Lexus GS430 User Manual page 282

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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.

RECIRCULATED AIR 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 AIR mode (with indicators 1 and

OUTSIDE AIR mode—The system will take fresh outside

air into the vehicle.

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.

AIR CONDITIONING