Lexus GS430 User Manual page 290

AIR CONDITIONING
3 Floor—Air flows mainly from the floor vents and rear
vents.
4 Floor/Windshield—Air flows mainly from the floor vents,
windshield vents and rear vents.
Take in the fresh air by selecting the OUTSIDE AIR mode with
the air intake control button.
If manual fan speed control is desired—
G21007
" 1 Fan speed at low
2 Fan speed at high
The fan speed can be set to your desired speed by touching
the appropriate air flow control switch. The higher the fan
speed is, the more air is delivered. Pushing the "OFF" button
turns off the fan.
To remove exterior windshield frost and interior windshield fog,
use the high speed setting.
266
If manual switching of air intake is desired—
G21008
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 AIR mode—If quick circulation of
cooled air is desired, select this mode.
2 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
2 on).
3 OUTSIDE AIR mode—The system will take fresh outside
air into the vehicle.