Page 349 of 573
3486-1. Using the air conditioning system
IS350/250_U (OM53758U)
With a navigation system Adjust the left-hand side temper-
ature setting
Adjust the fan speed setting
Select the air flow mode
Adjust the right-hand side tem-
perature setting
Display the option control screen
( P. 3 4 8 )
Tu r n t h e f a n o f f
Select to set auto mode on/off
To adjust or select settings, move the Remote Touch knob to select the screen
button, and then press the Remote Touch knob to enter the selected function.
■Option control screen
The functions can be switched on and off.
Cooling and dehumidification
function
Adjusting the temperature for
driver and passenger seats sepa-
rately (“DUAL” mode) ( P. 3 4 9 )
Removing pollen from the air
(Micro dust and pollen filter)
( P. 3 4 9 )
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4
5
6
7
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Page 350 of 573

3496-1. Using the air conditioning system
6
Interior features
IS350/250_U (OM53758U)
Press , or select “AUTO” on the air conditioning control screen.
Adjust the temperature setting.
To stop the operation, press or select “OFF” on the air conditioning
control screen.
■If the system is operated manually in automatic mode
If the fan speed setting or air flow modes are operated, the automatic mode
indicator goes off. However, automati c mode for functions other than that
operated are maintained.
■Adjusting the temperature for driver and passenger seats separately
(“DUAL” mode)
To turn on the “DUAL” mode, perform any of the following procedures:
●Press .
●Select “DUAL” on the option control screen.
●Adjust the passenger’s side temperature setting.
The indicator comes on when the “DUAL” mode is on.
While in “DUAL” mode, the temperature of the rear air outlets is set at the right-
hand side temperature setting.
■Switching between outside air and recirculated air modes
Press to change to recirculated air mode.
Press to change to outside air mode.
The indicator above the selected button comes on.
■Micro dust and pollen filter
Pollen is removed from the air and the air flows to the upper part of the body.
Select on the option control screen.
When the micro dust and pollen filter is on, is displayed on the air condition-
ing control screen.
In order to prevent the windshield from fo gging up when the outside air is cold, the
dehumidification function may operate.
The pollens are filtered out even if the micro dust and pollen filter is turned off.
Using automatic mode
Other functions
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Page 376 of 573
3756-4. Using the other interior features
6
Interior features
IS350/250_U (OM53758U)
To turn the compass on or off, push the
switch.
Compass
: If equipped
The compass on the inside rear view mirror indicates the direction in which
the vehicle is heading.
Operation
Displays and directions
DisplayDirection
NNorth
NENortheast
EEast
SESoutheast
SSouth
SWSouthwest
WWe s t
NWNorthwest
Page 377 of 573
3766-4. Using the other interior features
IS350/250_U (OM53758U)
The direction display deviates from the true direction determined by the earth’s
magnetic field. The amount of deviation varies according to the geographic posi-
tion of the vehicle.
If you cross over a map boundary shown in illustration, the compass will deviate.
To obtain higher precision or perfect calibration, refer to the following.
■Deviation calibration
Stop the vehicle in a place where it is safe to drive in a circle.
Press the switch until a number (1
to 15) appears on the compass
display.
Press the switch and referring to the map above, select the number of the
zone where you are.
If the direction is displayed several se conds after adjustment, the calibration is
complete.
Calibrating the compass
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2
3
Page 378 of 573

3776-4. Using the other interior features
6
Interior features
IS350/250_U (OM53758U)
■Circling calibration
When “C” appears on the display,
drive the vehicle at 5 mph (8 km/h)
or less in a circle until a direction is
displayed.
If there is not enough space to drive
in a circle, drive around the block
until the direction is displayed.
■Conditions unfavorable to correct operation
The compass may not show the correct direction in the following conditions:
●The vehicle is stopped immediately after turning.
●The vehicle is on an inclined surface.
●The vehicle is in a place where the earth's magnetic field is subject to interference by
artificial magnetic fields (underground car park/parking lot, under a steel tower,
between buildings, roof car park/parking lot, near an intersection, near a large vehicle,
etc.).
●The vehicle has become magnetized.
(There is a magnet or metal object near the inside rear view mirror.)
●The battery has been disconnected.
●A door is open.
CAUTION
■While driving the vehicle
Do not adjust the display. Adjust the di splay only when the vehicle is stopped.
■When doing the circling calibration
Secure a wide space, and watch out for people and vehicles in the neighborhood. Do
not violate any local traffic rules while performing circling calibration.
NOTICE
■To avoid compass malfunctions
Do not place magnets or any metal object s near the inside rear view mirror.
Doing this may cause the compass sensor to malfunction.
■To ensure normal operation of the compass
●Do not perform circling calibration of th e compass in a place where the earth's mag-
netic field is subject to interference by artificial magnetic fields.
●During calibration, do not operate electric systems (moon roof, power windows, etc.)
as they may interfere with the calibration.
Page 392 of 573

3917-2. Maintenance
7
Maintenance and care
IS350/250_U (OM53758U)
■Repair and replacement
It is recommended that genuine Lexus parts be used for repairs to ensure performance
of each system. If non-Lexus parts are used in replacement or if a repair shop other than
a Lexus dealer performs repairs, confirm the warranty coverage.
■Reset the maintenance data (U.S.A. only)
After the required maintenance is performed according to the maintenance schedule,
please reset the maintenance data.
To reset the data, follow the procedure described below:While the engine is running, switch the mu lti-information display to the “Settings”
screen. ( P. 81)
Select “Maintenance System” on the “Settings” screen.
Select “Yes” on the “Maintenance System” screen.
■Allow inspection and repairs to be performed by a Lexus dealer
●Lexus technicians are well-trained specialists an d are kept up to date with the latest ser-
vice information. They are well informed ab out the operations of all systems on your
vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has been per-
formed is under warranty coverage. If any problem should arise while your vehicle is
under warranty, your Lexus dealer will promptly take care of it.
A message will be disp
layed when the reset
procedure has been completed.
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Page 411 of 573
4107-3. Do-it-yourself maintenance
IS350/250_U (OM53758U)
If any washer does not work or the
warning message appears on the multi-
information display, the washer tank
may be empty. Add washer fluid.
Washer fluid
CAUTION
■When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains
alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.
Page 413 of 573

4127-3. Do-it-yourself maintenance
IS350/250_U (OM53758U)
Your vehicle is equipped with a tire pressure warning system that uses tire pres-
sure warning valves and transmitters to detect low tire inflation pressure before
serious problems arise.
●If the tire pressure drops below a predet ermined level, the driver is warned by
a screen display and a warning light. ( P. 4 6 7 )
◆Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and transmitters
must also be installed.
When new tire pressure warning valves and transmitters are installed, new ID
codes must be registered in the tire pressure warning computer and the tire
pressure warning system must be initialized. Have tire pressure warning valve
and transmitter ID codes registered by your Lexus dealer. ( P. 4 1 4 )
◆Initializing the tire pressure warning system
■The tire pressure warning system must be initialized in the following circum-
stances:
●When rotating the tires.
When the tire pressure warning system is initialized, the current tire inflation
pressure is set as the benchmark pressure.
Tire pressure warning system
●The tire pressure detected by the tire
pressure warning system can be dis-
played on the multi-information display.