air LEXUS RX330 2006 Repair Manual

AIR CONDITIONING
242
AUTOMATIC AIR CONDITIONING CONTROLS
You can adjust the brightness of the display. See “Multidisplay light control” on page 91 for details.

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The automatic air conditioning automatically maintains
the set temperature.
In the automatic operation mode, the air conditioning selects
the most suitable fan speed, air flow, air intake and on−
off the
air conditioning according to the temperature.
The ignition key must be in the “ON” position.
NOTICE
To prevent the battery from being discharged, do not
leave the air conditioning on longer than necessary
when the engine is not running.
1Driver side temperature display (in degrees
Fahrenheit or Centigrade)
2Air flow display
3Fan speed display
4Passenger side temperature display (in degrees
Fahrenheit or Centigrade)
5“TEMP” (driver side temperature control) button
(At the independent mode that display shows
“DUAL”; mainly for driver and secondarily for
front passenger)
(At the linked mode that display does not show
“DUAL”; for driver)
6“AUTO” button
7“OFF” button
8Air intake control button
9“A/C” button
10Fan speed control button
11“MODE”(air flow control) button
12“DUAL” (temperature setting mode change) button
13Windshield air flow button
14“PASSENGER TEMP” (passenger side temperature
control) button
(Only for the independent mode that display
shows “DUAL”; mainly for front passenger and
secondarily for driver)

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Air flow selection

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(a) Climate control
SETTING OPERATION — automatic control
1. Push the “AUTO” button.
An indicator light will illuminate to show that the automatic
operation mode has been selected.
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. When you press the “AUTO” button with the air
intake mode at OUTSIDE AIR, internal circulation may be
applied for maximum cooling. 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 depressed button is set. Other conditions continue to be
adjusted automatically.
Push the “OFF” button to turn the air conditioning system off.

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INFORMATION
This automatic control has additional function as
described below, when the “AUTO” button is pushed.
The fan speed is stopped for a little while until warm
air preparation, when outside temperature is cold like
a winter season in the “Floor”, “Bilevel” or
“Floor/Windshield” air flow mode. If quick removal
for exterior frost, fog and inside fog on the windshield
is desired, use the high fan speed setting after the
“Windshield” air flow mode has been selected.
The fan speed is stopped few seconds until cool air
preparation, when outside temperature is hot like a
summer season in the “Panel” or “Bilevel” air flow
mode.
 The internal circulation may be applied for maximum
cooling in the automatic operation mode, when
outside temperature is hot like a summer season.
If fresh outside air is desired into the vehicle, push
the air intake control button to select the OUTSIDE
AIR mode.
The “Floor/Windshield” air flow mode may be applied
automatically, if the outside temperature is lowered
down to below 0C (32F).
This is not malfunction. The “Floor/Windshield” air
flow mode turns on the defogging and defrosting
function with the purpose of cleaning your front view
for safe driving.
If the “Floor” air flow mode is desired with the main
purpose of heating, “Floor” air flow mode can be
selected manually by pushing the “MODE” (air flow
control) button.

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2. Use the “TEMP” or “PASSENGER TEMP” button to set
the desired vehicle interior temperature.
The “TEMP” or “PASSENGER TEMP” selector button is used
to set the desired interior temperature. The interior
temperature will be controlled on the driver and passenger side
room zones simultaneously or individually.
To increase the interior temperature, press the “ ” side, to
decrease it, press the “ ” side. If quick heating or cooling is desired —
“LO” appears when you hold it until maximum cooling
(decrease), and
“HI” appears when you hold it until maximum
warning (increase).
“TEMP” button — Changes the temperature on the driver and
passenger sides simultaneously or the driver side only.
“PASSENGER TEMP” button — Changes the temperature
settings separate from the driver side.

AIR CONDITIONING
248“DUAL” button —
This switch is used to set the temperatures independently for
the driver’s seat and front passenger seat.
Pushing the button changes the mode from independent and
linked.

Independent mode: Temperatures can be set
independently for the driver’s seat and front passenger’s
seat. The indicator light will illuminate to show that the
independent mode has been selected. The indicator light
will come on to show that the independent mode has been
selected.
 Linked mode: The same temperature is set for the driver’s
seat and front passenger’s seat. The indicator light will turn
off to show that the simultaneous temperature setting mode
has been selected.
When the temperature for the front passenger’s seat is
changed in linked mode, the mode is changed automatically to
independent mode.
INFORMATION
Knowledge for the twotemperature selector operation
This air conditioning system has two independent
temperature selectors: left and right (for the use of
driver and front passenger respectively).
 There are cases where the temperature of the airflow
may not accurately correlate on the driver and front
passenger side according to circumstances, even if
the left and right temperature selectors are set at the
same temperature. If this situation occurs, use the
fine tune operation to adjust the air temperature on
one side.
 There are cases where one or both of the airflow
temperatures may not accurately correlate with the
set temperature according to circumstances, when
the airflow temperature settings on the left and right
are substantially different. For example, if the left
controller is set at central or neutral temperature
while the right one is set at maximum heating or
maximum cooling, or vice versa. If this situation
occurs, use the fine tune operation to adjust the air
temperature on each side.

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Driver side setting air flow
Passenger side setting air flow
Mixed air flowSETTING OPERATION — manual control
When one of the manual control buttons is depressed
while operating in automatic mode, the operation
corresponding to the depressed button is set. Other
conditions continue to be adjusted automatically.
If manual air flow selection is desired —
The outlets from which air is delivered can be selected
manually by
pushing the button. The function of each mode is
as follows:
1Panel — Air flows mainly from the instrument panel vents
and rear vents.
2Bilevel — Air flows from both the floor vents, instrument
panel vents and rear vents.
When you set the temperature selector setting at about
the middle in automatic operation, warm air flows out of
the floor vents and relatively low−temperature air flows
out of the instrument panel vents and rear vents.

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3Floor — Air flows mainly from the floor vents and rear
vents.
4Floor/windshield — Air flows mainly from the floor vents,
windshield vents and rear vents.
Take in the fresh air with selecting the OUTSIDE AIR
mode by the air intake control button. If manual fan speed control is desired —
1Fan speed at low2 Fan speed at high
The fan speed can be set to your desired speed by pushing the
appropriate side of fan speed control button. The higher the fan
speed is, the more air is delivered. Push the “>” (increase) or
“<” (decrease) side of the button to adjust the fan speed.
Pushing the “OFF” button turns off the fan.
To remove the exterior windshield frost and interior windshield
fog, use the high speed setting.

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If manual switching of air intake is desired —
The air intake control 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 indicator light
will turn off and the system will take fresh outside air into the
vehicle.
If quick circulation of cooled air is desired, push the air intake
control
button for RECIRCULATED AIR. The indicator light will
come on.
For normal use, it is best to keep the air intake control button
set to the OUTSIDE AIR mode. If recirculated air is used during
heating, the windows will fog up more easily. To prevent fogging up of the windshield, the air intake mode
may change automatically to the OUTSIDE AIR mode
depending on the condition of the air conditioning system.
For example, when the ambient temperature is low, the air
intake mode may change automatically to the OUTSIDE AIR
mode. This is not a malfunction.
When the air conditioning is ON, if the engine coolant
temperature becomes extremely high, the RECIRCULATED
AIR mode is automatically selected. This is not a malfunction.
When
the engine coolant temperature is lowered, the previous
mode resumes.
If manual onoff 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 0 C (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.