1999 LEXUS SC300 air condition

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177
AUTOMATIC AIR CONDITIONING CONTROLS

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AIR CONDITIONING AND AUDIO
180The automatic air conditioning automatically maintains the
set temperature.
This air conditioning features automatic fan speed and air
flow
control which automatically selects the most suitable fan
speed and air flow to control the temperature. The ignition
key must be in the ºONº position.
You may use manual control to override the automatic
settings.
You can adjust the brightness of the display. See ºInstrument
panel light controlº on page 64 for details.

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(a) Climate control
SETTING OPERATION ± automatic control
1. Push the ºAUTOº knob.
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 adjusted. The operation status is shown by
each indicator.
When one of the manual control buttons is depressed while
operating in automatic mode, the operation corresponding to
the button depressed is set. Other conditions continue to be
adjusted automatically. 2. Turn the ºTEMPº knob until the desired temperature
is displayed.
The ºTEMPº knob is used to set the desired passenger
compartment temperature. The temperature of air delivered
to the passenger compartment will be controlled
automatically according to the setting. The figures on the
panel indicate degrees Fahrenheit.
SETTING OPERATION ± manual control
If manual air flow selection is desired ±
The outlets from which air is delivered can be selected
manually by pushing either side of the air flow control
(MODE) button. The mode appears on the display.
The function of each mode is as follows:
PANEL mode ± Directs air flow at face level.
BI±LEVEL mode ± Directs air flow at face level and
at floor level for both front and rear. Except in ventilation, the
air to the floor is slightly warmer than air to the face.
FLOOR mode ± Directs air flow mostly at floor level
for both front and rear.
FLOOR/WINDSHIELD mode ± Directs air flow to
the windshield and front side windows as well as floor level
for both front and rear.
FRONT WINDSHIELD mode ± Directs air flow
mostly to the windshield and front side windows.
When this mode is selected while operating in automatic
mode, the air conditioning is set to operate and the OUTSIDE

AIR CONDITIONING AND AUDIO
182AIR mode is set.
If you push the ºFRONT WINDSHIELDº button once again
while in the FRONT WINDSHIELD mode, the mode then
returns to the last mode used.
CAUTION
Do not use the FRONT WINDSHIELD mode during cooled
air operation in extremely humid weather. The difference
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 vision.
If quick heating or cooling is desired ±
Obtain maximum power by turning the ºTEMPº knob fully.
At this time, ºMAX. HOTº or ºMAX. COLDº will appear on
the display.
If manual fan speed control is desired ±
The fan speed can be set to your desired speed by pushing
either
side of the fan speed control
(FAN) button. The
higher the fan speed is, the more air is delivered. Pushing in
the
(OFF) button turns off the fan.
To remove exterior windshield frost, use the high speed
setting. Stopping the fan ±
Push in the
(OFF) button.
The fan stops in automatic mode or manual mode.
If manual switching of air intake is desired ±
(AIR INTAKE) button is used to switch the air
intake between the OUTSIDE AIR mode and
RECIRCULATED AIR mode.
With the button in the OUTSIDE AIR mode, the OUTSIDE
AIR mode indicator light will come on and the system will
take fresh outside air into the vehicle.
If quick circulation of cooled air is desired, press in the air
intake control button for RECIRCULATED AIR. The
RECIRCULATED AIR mode indicator light will come on.
For normal use, it is best to keep the air intake control button

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set to OUTSIDE AIR mode. If recirculated air is used during
heating, the windows will fog up more easily.
If manual on±off of the air conditioning is desired ±
Push the
(A/C) button to turn the air conditioning on
and push it again to turn the air conditioning off.
The air conditioning does not work if the outside temperature
is lowered down to around 0C (32F).
If the system is used for ventilation, heating in dry weather or
removing frost or exterior fog on the windshield, turn the air
conditioning off once it is no longer required. This will
improve fuel economy. The air conditioning can be used for
year±round automatic temperature control including cooling
and dehumidifying operation. If the air conditioning compressor does not operate, the
indicator of the
(A/C) button will blink. If the indicator
of the (A/C) button blinks even when the (A/C)
button is pushed again, have the compressor checked by your
nearest Lexus dealer.
(b) Windshield defogging and defrosting
See º(a) Climate controlº for details on each button.
To remove interior fog on the windshield ±
Push the
(WINDSHIELD) button.
To remove frost or exterior fog on the windshield ±
1. Place the temperature control knob at the maximum
temperature.
2. Push the
(WINDSHIELD) button.
3. Push the right side of the fan speed control
(FAN)
button to set the fan speed at the maximum speed.

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(c) 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 ºCenter ventsº, ºSide ventsº and ºLower
ventº.)

To help cool down the interior after parking 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 vehicle 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
fan speed control button be pressed to anywhere except the
ºOFFº button.

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.