Lexus 2003 LS Owner's Manual page 633

Automatic Air Conditioning Controls
If manual switching of air intake is de-
sired –
Each time you push the air intake control but-
ton, the mode changes in order from the RE-
CIRCULATED AIR mode to AUTOMATIC
mode to OUTSIDE AIR mode, then back to
the RECIRCULATED AIR mode. Each indi-
cator light shows which mode is now se-
lected.
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1 RECIRCULATED AIR mode – If quick
circulation of cooled air is desired, se-
lect this mode.
2 EXHAUST GAS AUTOMATIC mode –
If the outside air contains harmful sub-
stances like exhaust gas (i.e., when the
vehicle running just in front of your ve-
hicle accelerates rapidly), the system
changes automatically from the OUT-
SIDE AIR mode (with indicators
and 3 on) to the RECIRCULATED
mode (with indicators 1 and 2 on).
If you use the air purifier automatic
mode at the same time, air purifying ef-
fect will be enhanced (If equipped).
3
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 in-
take control button set to OUTSIDE AIR
mode. If recirculated air is used during heat-
ing, the windows will fog up more easily.
To change the sensitivity of the sensor
switching between the RECIRCULATED
and OUTSIDE AIR in the AUTOMATIC
mode, push the air intake control button
for a few seconds. The display changes
as illustrated below.
The sensitivity of the sensor can be adjusted
only while the vehicle has been stopped.
2
UNG508
Touch the desired switch.
When you push any button except the air in-
take control button, the above screen disap-
pears.