cooling Lexus IS350 2020 Owner's Manual / LEXUS 2020 IS300,IS350 OWNER'S MANUAL (OM53F29U)

2974-5. Using the driving support systems
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
Vehicles without Adaptive Variable Suspension System
Normal mode
Provides an optimal balance of fuel economy, quietness, and dynamic perfor-
mance. Suitable for city driving.
Press the switch to change the driving mode to normal mode when Eco drive mode or
sport mode is selected.
Eco drive mode
Helps the driver accelerate in an eco-fr iendly manner and improve fuel econ-
omy through moderate throttle charact eristics and by controlling the opera-
tion of the air conditioning system (heating/cooling).
When not in Eco drive mode, if the driving mode select switch is turned to the left, the
Eco drive mode indicator will come on.
Sport mode
Controls the transmission and engine to provide quick, powerful acceleration.
This mode also changes the steering feel, making it suitable for when agile
driving response is desired, such as wh en driving on roads with many curves.
When not in sport mode, if the driving mode select switch is turned to the right, the
“SPORT” indicator will comes on.
Driving mode select switch
The driving modes can be selected to suit driving condition.
Except
F SPORT models F SPORT
models
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2994-5. Using the driving support systems
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
Eco drive mode
Helps the driver accelerate in an eco-friendly manner and improve fuel econ-
omy through moderate throttle charact eristics and by controlling the opera-
tion of the air conditioning system (heating/cooling).
When not in Eco drive mode, if the driving mode select switch is turned to the left, the
Eco drive mode indicator will come on.
Sport mode
•SPORT S mode
Controls the transmission and engine to provide quick, powerful accelera-
tion. This mode is suitable for when agile driving response is desired, such
as when driving on roads with many curves.
When not in SPORT S mode, if the driving mode select switch is turned to the
right, the “SPORT S” indicator will come on.
•SPORT S+ mode
Helps to ensure steering performanc e and driving stability by simultane-
ously controlling the steeri ng and suspension in addition to the transmis-
sion and engine. Suitable for sportier driving.
When in SPORT S mode, if the driving mo de select switch is turned to the
right, the “SPORT S+” indicator will come on.
FunctionSetting
Powertrain
Normal
Power
Eco
ChassisNormal
Sport
Air conditioning systemNormal
Eco
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3004-5. Using the driving support systems
IS350 AWD/IS350/IS300 AWD/IS300_U
■Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the air condi-
tioning system to enhance fuel efficiency. To improve air conditioning performance,
adjust the fan speed or turn off Eco drive mode.
■Automatic deactivation of sport mode and customized mode
If the engine switch is turned off after dr iving in sport mode or customized mode, the
drive mode will be changed to normal mode.
■Driving mode pop-up display (vehicles with a navigation system)
When the driving mode is changed, the sele cted driving mode will be temporarily dis-
played on the side display. (
P. 415)

4196-2. Using the air conditioning system
6
Interior features
IS350 AWD/IS350/IS300 AWD/IS300_U
With a Lexus Display AudioAdjust the left-hand side tem-
perature setting
Adjust the fan speed setting
Select to set auto mode on/off
Select to set eco mode on/off
( P. 424)
Select to set cooling and dehu-
midification function on/off
If the “A/C” indicator is tu rned off, the system will blow ambient temperature air or
heated air.
Adjust the temperature for driver an d passenger seats separately (“DUAL”
mode) ( P. 421)
Display the option control screen ( P. 420)
Select the air flow mode
Adjust the right-hand side temperature setting
With a navigation system
Adjust the left-hand side tem-
perature 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. 420)
Select to set automatic mode on/off
Select to set cooling and dehumidification function on/off
If the “A/C” indicator is tu rned off, the system will blow ambient temperature air or
heated air.
Adjust the temperature for driver an d passenger seats separately (“DUAL”
mode) ( P. 421)
Select to set eco mode on/off ( P. 424)
Air conditioning control screen
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4206-2. Using the air conditioning system
IS350 AWD/IS350/IS300 AWD/IS300_U
■Option control screen
Select on the air conditioning control screen to display the option
control screen. The functions can be switched on and off.
■Side display operation screen (v ehicles with a navigation system)
Select the air flow mode
Adjust the left-hand side tem-
perature setting
Adjust the fan speed setting
Adjust the right-hand side tem-
perature setting
Select to set auto mode on/off
Select to set cooling and dehu-
midification function on/off
If the “A/C” indicator is tu rned off, the system will blow ambient temperature air or
heated air.
Adjust the temperature for driver an d passenger seats separately (“DUAL”
mode) ( P. 421)
With a Lexus Display Audio With a navigation system
Removing pollen from the air (Mic ro dust and pollen filter) (P. 421)
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4246-2. Using the air conditioning system
IS350 AWD/IS350/IS300 AWD/IS300_U
■Using automatic mode
Fan speed is adjusted automatically according to the temperature setting and the ambi-
ent conditions.
Therefore, the fan may stop for a while until wa rm or cool air is ready to flow immediately
after is pressed or “AUTO” is selected.
■Using the voice command system (vehicles with a navigation system)
Air conditioning system can be operated using voice commands. For details, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.
■Fogging up of the windows
The windows will easily fog up when the humidity in the vehicle is high. Turning
(“A/C”) on will dehumidify the air from the outlets and defog the windshield effectively.
●If you turn (“A/C”) off, the windows may fog up more easily.
●The windows may fog up if the recirculated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up by the ve hicle is still drawn into the vehicle after clos-
ing the windows, it is recommended that the air intake mode be set to outside air mode
and the fan speed to any setting except off.
■Outside/recirculated air mode
●Setting to the recirculated air mode temporarily is recommended in preventing dirty air
from entering the vehicle interior and helping to cool the vehicle when the outside air
temperature is high.
●Outside/recirculated air mode may automa tically switch depending on the tempera-
ture setting or the inside temperature.
■When the outside temperature exceeds 75 F (24 C) and the air conditioning system
is on
●In order to reduce the air co nditioning power consumption, the air conditioning system
may switch to recirculated air mode automa tically. This may also reduce fuel consump-
tion.
●Recirculated air mode is selected as a defaul t mode when the engine switch is turned to
IGNITION ON mode.
●It is possible to switch to outside air mode at any time by pressing .
■Operation of the air conditioning system in Eco drive mode
In Eco drive mode, the air conditioning system is controlled as follows to prioritize fuel
efficiency:
●Engine speed and compressor operation controlled to restrict heating/cooling capac-
ity
●Fan speed restricted when automatic mode is selected
To improve air conditioning performanc e, perform the following operations:
●Adjust the fan speed
●Turn off Eco drive mode

4276-2. Using the air conditioning system
6
Interior features
IS350 AWD/IS350/IS300 AWD/IS300_U
Each time the switch is pressed, the
intensity of the seat heater changes and
the level indicator lights (amber) light
as follows:
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
■The seat heaters can be used when
The engine switch is in IGNITION ON mode.
■Seat heater timer control
To enable seat heater timer control, press and hold the driver and front passenger seat
heater switches at the same time until a buzzer sounds once. If a seat heater is turned on
while seat heater timer control is enabled, the intensity of the seat heater will automati-
cally change from Hi Mid Lo.
The timing of the change in seat heater in tensity differs depending on the temperature
inside the cabin, etc. when the seat heater is operating.
To disable seat heater timer control, press and hold the driver and front passenger seat
heater switches at the same time until a buzzer sounds twice.
Each time the switch is pressed, the
intensity of the seat ventilator changes
and the level indicator lights (green)
light as follows:
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
■The seat ventilators can be used when
The engine switch is in IGNITION ON mode.
■Seat ventilator
The seat ventilators provide ventilation only, and do not have a heating/cooling function.
Seat heaters
Type A Type B
Seat ventilators

4697-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
WARNING
The engine compartment contains many mechan isms and fluids that may move suddenly,
become hot, or become electrically energize d. To avoid death or serious injury, observe
the following precautions.
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel and
battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
(  P. 480)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner f ilter removed may cause excessive engine wear due to dirt
in the air.

4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
IS350 AWD/IS350/IS300 AWD
Engine compartment
Fuse boxes (P. 504)
Battery ( P. 482)
Engine oil level dipstick (P. 475)
Engine coolant reservoir (P. 478)
Engine oil filler cap ( P. 476)Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Radiator ( P. 480)1
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4747-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
IS300
Fuse boxes ( P. 504)
Battery ( P. 482)
Intercooler
Engine oil level dipstick (P. 475)
Engine oil filler cap ( P. 476)
Engine coolant reservoir (P. 478) Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Intercooler radiator ( P. 478)
Radiator ( P. 480)
Intercooler coolant reservoir (P. 478)1
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