2001 Lexus GS300 ECO mode

Automatic Air Conditioning Controls
80
The automatic air conditioning auto-
matically maintains the set tempera-
ture.
This air conditioning features automatic
fan speed and air flow control which auto-
matically selects the most suitable fan
speed and air flow to control the tempera-
ture. The ignition key must be in the ºONº
position.
CLIMATE: Push this button to display
switches for automatic air conditioning con-
trols.
NOTICE
To prevent the battery from being dis-
charged, do not leave the air condition-
ing on longer than necessary when the
engine is not running.
(a) Climate control
SETTING OPERATION ± automatic con-
trol
UNG502
1. Push the ºAUTOº button.
Air flow quantity, switching of the diffusers,
on±off of the air conditioning, and switching
of the air intake between RECIRCULATED
AIR and OUTSIDE AIR are automatically ad-
justed. The operation status is shown by
each indicator.
When one of the manual control buttons is
depressed while operating in automatic
mode, the mode relevant to the depressed
button is set. Other conditions continue to be
adjusted automatically.Push the ºOFFº button to turn the air condi-
tioning off.
It is recommended to close the lower vent.
For details about it, see page 88.

Automatic Air Conditioning Controls
82SETTING OPERATION ± manual control
When one of the manual control buttons
is depressed while operating in automat-
ic mode, the mode relevant to the de-
pressed button is set. Other conditions
continue to be adjusted automatically.
If manual air flow selection is desired ±
UNG504
The outlets from which air is delivered can be
selected manually by touching the switch.
The function of each mode is as follows:
1
Panel ± Air flows mainly from the instru-
ment panel vents.
2
Bi±level ± Air flows from both the floor
vents and the instrument panel vents.
3
Floor ± Air flows mainly from the floor
vents.
It is recommended to close the lower vent.
For details about it, see page 88.
4
Floor/Windshield ± Air flows mainly
from the floor vents and windshield
vents.
It is recommended to close the lower vent.
For details about it, see page 88.
The selected mode is highlighted in green.
If quick heating or cooling is desired ±
UNG505
Push the ºTEMPº or ºPASSENGER TEMPº
button on either side and hold it until the max-
imum figure or minimum figure appears.If manual fan speed control is desired ±
UNG506

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 ºOFFº
button turns off the fan.
To remove exterior windshield frost, use the
high speed setting.
The selected mode is highlighted in green.

83 If manual switching of air intake is de-
sired ±
UNG507
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.
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
2
and 3
on) to the RECIRCULATED
mode (with indicators
1
and 2
on).
3
OUTSIDE AIR mode ± The system will
take fresh outside air into the vehicle.
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.
Turning off the air conditioning manually will
cancel the EXHAUST GAS AUTOMATIC
mode. If you select the ªAUTOº mode during
fan operating, the air conditioning turns on
and the EXHAUST GAS AUTOMATIC mode
will operate.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.
UNG508
Touch the desired switch.
When you push any button except the air in-
take control button, the above screen disap-
pears.

Automatic Air Conditioning Controls
84If manual on±off of the air conditioning is
desired ±
Push the ºA/Cº button to turn the air condi-
tioning on and push it again to turn the air
conditioning off. If you turn off the air condi-
tioning manually, the EXHAUST GAS AUTO-
MATIC mode will be cancelled.
If the outside temperature is lowered down to
around 0C (32F), the air conditioning will
turn off automatically. At this time, the indica-
tor on the A/C button is off and the EXHAUST
GAS AUTOMATIC indicator light remains on.
However, the EXHAUST GAS AUTOMATIC
mode does not operate. When the air condi-
tioning turns on as with the raised tempera-
ture, the EXHAUST GAS AUTOMATIC
mode resumes.
If the system is used for ventilation, heating
in dry weather or removing frost or exterior
fog on the windshield, turn the air condition-
ing off once it is no longer required. This will
improve fuel economy. The air conditioning
can be used for year±round automatic tem-
perature control including cooling and dehu-
midifying operation.If the air conditioning compressor does not
operate, the indicator of the ºA/Cº button will
blink. If the indicator of the ºA/Cº button
blinks even when the ºA/Cº button is pushed
again, have the compressor checked by
your nearest Lexus dealer.
(b) Windshield defogging and
defrosting
UNG509
To remove interior fog on the windshield
±
Push the ºFRONT WINDSHIELDº button.
To remove frost or exterior fog on the
windshield ±
1. Push the upper side of the temperature
control button until maximum figure appears
on the temperature display.
2. Push the ºFRONT WINDSHIELDº but-
ton.

Automatic Air Conditioning Controls
85 3. Push the ºHIº of the air flow control switch
to obtain a maximum air flow.
4. Leave the air conditioning on±off button
off.
For further information for removing frost and
fog, see ºLower ventº on page 88.
When the ºFRONT WINDSHIELDº button is
pushed while operating in automatic mode,
the air conditioning is set to operate and the
OUTSIDE AIR mode is set.
If you push the ºFRONT WINDSHIELDº but-
ton once again while in the FRONT WIND-
SHIELD mode, the mode then returns to the
last mode used.
CAUTION
Do not use the ºFRONT WINDSHIELDº
button during cooled air operation in
extremely humid weather. The differ-
ence between the temperature of the
outside air and that of the windshield
could cause the outer surface of the
windshield to fog up blocking your vi-
sion.
When you turn the ignition switch on after the
removal and installation of the battery termi-
nal, the indicator light may flash and the oper-
ating sound of the motor may be heard. This
does not indicate a malfunction.
You may hear the operating sound of the mo-
tor about 70 seconds after the ignition switch
is turned off. This is not also a malfunction.(c) Outside temperature
display
UNG510
Outside temperature is displayed on the
screen.
The displayed temperature ranges from
±30C (±22F) up to 50C (122F). If the
temperature does not appear on the display
or it shows º± ± ±º, take your vehicle to your
Lexus dealer.

Automatic Air Conditioning Controls
86
(d) Air filter
The air filter may clog after long use and re-
duce air flow. You can inspect the filter easily.
When you inspect and replace the air filter,
be sure to turn off the fan.
UNG511
1. Open the glove box and remove the
two covers.
UNG512
2. Take out the air filter.
If it is dirty, it should be replaced. To maintain
the air conditioning efficiency, replace the air
filter according to the maintenance sched-
ule. (For scheduled maintenance informa-
tion, please refer to the ºOwner's Manual
Supplement / Maintenance Scheduleº.)
NOTICE
Do not drive with the air filter removed,
or the efficiency of air conditioning may
be lost.
(e) Operating tips
Make sure the air inlet grilles in front of
the windshield are not blocked by leaves
or other obstructions.
If air flow control is not satisfactory,
check the dashboard vents. (See ºCen-
ter ventsº, ºSide ventsº, ºLower ventº
and ºRear ventsº.)
To help cool down the interior after park-
ing in the hot sun, drive for the first few
minutes with the windows open. After
the excess heat has blown away, close
the windows.
When driving on dusty roads, close all
windows. If dust thrown up by the ve-
hicle is still drawn into the vehicle after
closing the windows, it is recommended
that the air intake control button be left
to the OUTSIDE AIR mode and the air
flow control switch be selected to any-
where except the ºOFFº button.

Automatic Air Conditioning Controls
87 If following another vehicle on a dusty
road, or driving in windy and dusty
conditions, it is recommended that the
air intake control button be temporarily
pressed in to the RECIRCULATED AIR
mode, which will close off the outside
passage and prevent outside air and
dust from entering the vehicle interior.
Center vents
UNG513
The center vents may be opened or
closed as shown.
Side vents
UNG514
The side vents may be opened or closed
as shown.

Automatic Air Conditioning Controls Automatic Air Conditioning Controls
88
Lower vent
UNG515
The lower vent may be opened or closed
as shown.
It is recommended to close the lower vent for
removing frost or fog on the side windows
button or use the ºFloorº, ºFloor/Windshieldº
or ºWindshieldº mode.
Rear vents
UNG516
The rear vents may be opened or closed
as shown.