2016 LEXUS RX350 cooling

3694-5. Using the driving support systems
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Driving
RX350_U_OM48E90U 
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- friendly manner and improve fuel econ-
omy through moderate throttle characteristics 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 tu rned 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 f eel, 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 conditions.
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3714-5. Using the driving support systems
4
Driving
RX350_U_OM48E90U Eco drive mode
Helps the driver accelerate in an eco- friendly manner and improve fuel econ-
omy through moderate throttle characteristics 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 tu rned 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 simulta-
neously controlling the steering and suspen sion in addition to the transmis-
sion and engine. Suitable for sportier driving. When in SPORT S mode, if the driving mode select switch is turned to the right,
the “SPORT S+” indicator will come on. Function Setting
Po w e r t r a i n Normal
Po w e r
Eco
Chassis Normal
Sport
Air conditioning system Normal
Eco2
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372 4-5. Using the driving support systems
RX350_U_OM48E90U ■
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 (12.3-inch display only)
When the driving mode is changed, the selected driving mode will be temporarily dis-
played on the side display. (  P. 4 9 2 )

4976-2. Using the air conditioning system and defogger
6
Interior features
RX350_U_OM48E90U 
Lexus Display Audio screen
Adjust the left-hand side temper-
ature setting
Adjust the fan speed setting
Select to set auto mode on/off
Select to set eco mode on/off
(  P. 5 0 3 )
Select to set cooling and dehu-
midification function on/off
Adjust the temperature for driver and passenger seats separately (“DUAL”
mode) (  P. 4 9 9 )
Display the option control screen (  P. 4 9 8 )
Select the air flow mode
Adjust the right-hand side temperature setting 
Navigation system screen
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. 4 9 8 )
Select to set automatic mode on/off
Select to set cooling and de humidification function on/off
Adjust the temperature for driver and passenger seats separately (“DUAL”
mode) (  P. 4 9 9 )
Select to set eco mode on/off (  P. 5 0 3 )Control screen 1
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498 6-2. Using the air conditio ning system and defogger
RX350_U_OM48E90U ■
Option control screen
Select on the air conditioning control screen to display the option
control screen. The functions can be switched on and off.
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Side display operation screen (Vehicle s with a navigation system [12.3-inch
display])
Select the air flow mode
Adjust the left-hand side temper-
ature 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
Adjust the temperature for driver and passenger seats separately (“DUAL”
mode) (  P. 4 9 9 ) 
Lexus Display Audio screen 
Navigation system screen
Prevent ice from building up on th e windshield and wiper blades (if
equipped) (  P. 5 0 0 ) 1
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5036-2. Using the air conditioning system and defogger
6
Interior features
RX350_U_OM48E90U ■
Outside/recirculated air mode ●
When driving on dusty roads such as tunnels or in heavy traffic, set the outside/recircu-
lated air mode button to the recirculated ai r mode. This is effective in preventing out-
side air from entering the vehicle interi or. During cooling operation, setting the
recirculated air mode will also cool the vehicle interior effectively. ●
Outside/recirculated air mode may automa tically switch depending on the tempera-
ture setting or the inside temperature. ■
When the outside temperature is low
The dehumidification function may not operate even when “A/C” is selected. ■
Operation of the air conditioning system in Eco drive mode ●
In the Eco drive mode, the air conditioning sy stem is controlled as follows to prioritize
fuel efficiency
• Engine speed and compressor operation controlled to restrict heating/cooling
capacity
• Fan speed restricted when automatic mode is selected ●
To improve air conditioning performa nce, perform the following operations
• Adjust the fan speed
• Turn off Eco drive mode ■
Ventilation and air conditioning odors ●
To let fresh air in, set the air conditio ning system to the outside air mode.●
During use, various odors from inside and outside the vehicle may enter into and accu-
mulate in the air conditioning system. This may then cause odor to be emitted from the
vents. ●
To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to outside air mode prior
to turning the vehicle off.
• The start timing of the blower may be dela yed for a short period of time immediately
after the air conditioning system is started in automatic mode.■
Air conditioning filter
 P. 5 9 8 ■
Customization
Some functions can be customized. (  P. 6 9 9 )

5717-3. Do-it-yourself maintenance
7
Maintenance and care
RX350_U_OM48E90U * : Vehicles with sing le-beam headlightsTire inflation pres-
sure (  P. 5 9 3 ) • Tire pressure gauge • Compressed air source
Wa s h e r f l u i d
(  P. 5 8 3 ) • Water or washer fluid containi ng antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)
WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
become hot, or become electrically energized. 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 cautions 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. 5 7 9 ) ■
Safety glasses
Wear safety glasses to prevent flying or fallin g material, fluid spray, etc. from getting in
your eyes.
NOTICE ■
If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt
in the air. Items Pa r t s a n d t o o l s

574 7-3. Do-it-yourself maintenance
RX350_U_OM48E90UEngine compartment
Wa s h e r f l u i d t a n k (  P. 5 8 3 )
Engine oil filler cap (  P. 5 76 )
Engine oil level dipstick
(  P. 5 7 5 )
Engine coolant reservoir
(  P. 5 7 8 ) Battery (  P. 5 8 1 )
Brake fluid reservoir (  P. 5 8 0 )
Fuse box (  P. 6 0 5 )
Radiator (  P. 5 7 9 )
Condenser (  P. 5 7 9 )
Electric cooling fans1
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