2021 LEXUS LS500 cooling

2994-5. Using the driving support systems
4
Driving
Vehicles without Adaptive Variable
Suspension System
1 Normal mode
Provides an optimal ba lance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
Press the switch to change the driving
mode to normal mode when not in normal
mode.
2 Eco drive mode
Helps the driver accelerate in an
eco-friendly manner and improve fuel
economy through moderate throttle char-
acteristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned backward, the
Eco drive mode indicator will come on.
3Sport mode
Controls the transmission and engine to
provide quick, powerful acceleration. This
mode also changes the steering feel, mak-
ing it suitable for when agile driving
response is desired, such as when driving on roads with many curves.
When not in sport mode, if the driving
mode select switch is turned forward, the
sport mode indicator will comes on.
Vehicles with Adaptive Variable
Suspension System
Except F SPORT models
F SPORT models
1 Normal mode/Custom mode
Normal mode and custom mode are
selected by pressing the driving mode
select switch. Each time the switch is
pressed, the driving mode changes
between normal mode and custom mode.
When normal mode is selected, the normal
mode indicator comes on.
When custom mode is selected, the cus-
tom mode indicator comes on.
Press the switch to change the driving
mode to normal mode when not in normal
mode.
• Normal mode
Provides an optimal ba lance of fuel econ-
omy, quietness, and dynamic performance.
Driving mode select switch
The driving modes can be selected
to suit driving condition.
Selecting a drive mode
A
B

3004-5. Using the driving support systems
Suitable for city driving.
When the shift position is in D, an appropri-
ate gear for sporty driving may automati-
cally be selected according to driver
performance and driving conditions.
•Custom mode
Allows you to drive with the powertrain,
chassis and air conditioning system func-
tions set to your preferred settings. Cus-
tom mode settings can only be changed on
the drive mode customization display of
the Center Display. ( P.316)
2 Comfort mode
By controlling the suspension, riding com-
fort is further enhanc ed. Suitable for city
driving.
When not in comfort mode and the driving
mode select switch is turned backward, the
comfort mode indicator comes on.
3 Eco drive mode
Helps the driver accelerate in an
eco-friendly manner and improve fuel
economy through moderate throttle char-
acteristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When in comfort mode, if the driving mode
select switch is turned backward, the Eco
drive mode indicator comes on.
4Sport mode
•Sport S mode
Controls the transmission and engine to
provide quick, powerful acceleration. 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 forward, the
Sport S mode indicator comes on.
•Sport S+ mode
Helps to ensure stee ring performance and
driving stability by simultaneously con- trolling the steering and suspension in
addition to the transmission and engine.
Suitable for sportier driving.
When in Sport S mode, if the driving mode
select switch is turned forward, the Sport
S+ mode indicator comes on.
■If the driving mode select switch is oper-
ated while the opening screen is being
displayed
If the driving mode sele ct switch is operated
while the opening screen is being displayed,
the driving mode will be changed and the
meter display will chan ge accordingly after
the opening screen operation has com-
pleted.
■Operation of the air conditioning sys-
tem in Eco drive mode
Eco drive mode controls the heating/cool-
ing operations and fan speed of the air con-
ditioning system to enhance fuel efficiency.
To improve air condit ioning performance,
perform the following operations:
●Turn off eco air conditioning mode
(  P.328)
●Adjust the fan speed ( P.323)
●Turn off Eco drive mode
■Automatic deactivation of sport mode
and custom mode
If the engine switch is turned off after driv-
ing in sport mode or custom mode, the
drive mode will be changed to normal
mode.
■Driving mode pop-up display
When the driving mode is changed, the
selected driving mode will be temporarily
displayed on the side display. ( P.317)

3255-3. Using the air conditioning system and defogger
5
Interior features
■Registering air conditioning settings to
electronic keys
●Unlocking the vehicle using an electronic
key and turning the engine switch to
IGNITION ON mode will recall that
key’s registered air conditioning settings.
●When the engine switch is turned off, the
current air conditioning settings will auto-
matically be registered to the electronic
key that was used to unlock the vehicle.
●The system may not operate correctly if
more than one electr onic key is in the
vicinity or if the smart access system with
push-button start is used to unlock a pas-
senger door.
●The doors that can recall the air condi-
tioning setting* when unlocked using the
smart access system with push-button
start can be changed. For details, contact
your Lexus dealer.
*: The doors that can recall the driving
position memory are changed at the
same time.
■Operation of the air conditioning sys-
tem in Eco drive mode
In Eco drive mode, the air conditioning sys-
tem is controlled as follows to prioritize fuel
efficiency:
●Engine speed and compressor operation
controlled to restri ct heating/cooling
capacity
●Fan speed restricted when automatic
mode is selected
To improve air condit ioning performance,
perform the following operations:
●Turn off eco air conditioning mode
(  P.326)
●Adjust the fan speed
●Turn off Eco drive mode ( P.299)
■When the outside temperature falls to
nearly 32°F (0°C)
The dehumidification function may not
operate even when “A/C” is selected.
■Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning
system to the outside air mode.
●During use, various odors from inside and
outside the vehicle may enter into and
accumulate in the air conditioning sys-
tem. This may then cause odor to be
emitted from the vents.
●To reduce potential odors from occur-
ring:
• It is recommended that the air condition-
ing system be set to outside air mode
prior to turning the vehicle off.
• The start timing of the blower may be
delayed for a short pe riod of time imme-
diately after the air conditioning system is
started in automatic mode or with the
micro dust and pollen filter on.
●When parking, the system automatically
switches to outside air mode to encour-
age better air circulation throughout the
vehicle, helping to reduce odors that
occur when starting the vehicle.
■Using the voice command system
Air conditioning system can be operated
using voice commands. For details, refer to
the “NAVIGATION AND MULTIMEDIA
SYSTEM OWNER’S MANUAL”.
■Air conditioning filter
 P.409
■Air conditioning system refrigerant
●A label regarding the refrigerant of the
air conditioning system is attached to the
hood at the location shown in the follow-
ing illustration.
●The meaning of each symbol on the label
are as follows:
Caution
Air conditioning system

3275-3. Using the air conditioning system and defogger
5
Interior features
: Air flows to the upper body
: Air flows to the upper body and feet
: Air flows to the feet
: Air flows to the feet and the wind-
shield defogger operates
Adjust the right side seat tempera-
ture setting
Switch the following functions on
and off
“A/C”: Set cooling and dehumidification
function
If the indicator is turned off, the system will
blow ambient temperature airor heated air.
: Select front seat concentrated
airflow mode (S-FLOW) (P.330)
: Set eco air conditioning mode
: Set Lexus Climate Concierge
(  P.321)
“DUAL”: Adjust the temperature for driver
and passenger seats separately (“DUAL”
mode) ( P.331)
Vehicles with 4-ZONE climate con-
trol
Sub menu
Selecting the sub menu item to switch the main screen.
: Display the front air conditioning
control screen
: Display the heated steering
wheel/front seat heater /front seat ventila-
tor control screen
: Display the rear air conditioning con-
trol screen
: Display the rear seat heater/rear seat
ventilator control screen
: Display the Lexus Climate Con-
cierge control screen
: Display the option control screen
Adjust the left side seat tempera-
ture setting
Select the right side seat air flow
mode
: Air flows to the upper body
: Air flows to the upper body and feet
: Air flows to the feet
: Air flows to the feet and the wind-
shield defogger operates
Select the left side seat air flow
mode
Adjust the fan speed setting
Switch the following functions on
and off
“A/C”: Set cooling and dehumidification
function
If the indicator is turned off, the system will
blow ambient temperature airor heated air.
E
F
A
B
C
D
E
F

3285-3. Using the air conditioning system and defogger
: Select front seat concentrated
airflow mode (S-FLOW) (P.330)
: Set eco air conditioning mode
: Set Lexus Climate Concierge
(  P.321)
“4-ZONE”: Adjust the temperature for the
driver, front passenger and left and right
rear passenger se ats separately
(“4-ZONE” mode) ( P.331)
Adjust the right side seat tempera-
ture setting
■Option control screen
Select on the sub menu to display
the option control screen.
The functions can be switched on and off.
When the function is on, the indicator illu-
minates on the screen.
Vehicles with DUAL-ZONE climate
control
Set Lexus Climate Concierge
( P.321)
Adjusting the temperature for
driver and passenger seats sepa-
rately (“DUAL” mode) ( P.331)
Set eco air conditioning mode
Air conditioning and heater output is lim-
ited to prioritize fuel economy.
Cooling and dehumidification func-
tion
If the “A/C” indicator is turned off, the sys-
tem will blow ambient temperature airor
heated air.
Select front seat concentrated air-
flow mode (S-FLOW) ( P.330)
Prevent ice from building up on the
windshield and wiper blades
(Windshield wiper de-icer) (if
equipped)
Removing pollen from the air
(Micro dust and pollen filter)
Vehicles with 4-ZONE climate con-
trol
Set Lexus Climate Concierge
( P.321)
Adjust the temperature for driver,
passenger and rear seats sepa-
rately (“4-ZONE” mode) ( P.331)
Set eco air conditioning mode
Air conditioning and heater output is lim-
ited to prioritize fuel economy.
Cooling and dehumidification func-
tion
If the “A/C” indicator is turned off, the sys-
tem will blow ambient temperature airor
heated air.
Select front seat concentrated air-
G
A
B
C
D
E
F
G
A
B
C
D
E

3295-3. Using the air conditioning system and defogger
5
Interior features
flow mode (S-FLOW) (P.330)
Prevent ice from building up on the
windshield and wiper blades
(Windshield wiper de-icer) (if
equipped)
Removing pollen from the air
(Micro dust and pollen filter)
■Side display
Vehicles with DUAL-ZONE climate
control
Display the front seat heaters/front
seat ventilators control screen
( P.336)
Adjust the fan speed setting
Select the air flow mode
Set cooling and dehumidification
function on/off
If the indicator is turned off, the system will
blow ambient temperature airor heated air.
Select front seat concentrated air-
flow mode (S-FLOW) ( P.330)
Adjusting the temperature for
driver and passenger seats sepa-
rately (“DUAL” mode) ( P.331)
Set Lexus Climate Concierge
( P.321)
Vehicles with 4-ZONE climate con-
trol
Display the front seat heaters/front
seat ventilators control screen
( P.336)
Select the left side seat air flow
mode
Adjust the fan speed setting
Select the right side seat air flow
mode
Set cooling and dehumidification
function on/off
If the indicator is turned off, the system will
blow ambient temperature airor heated air.
Select front seat concentrated air-
flow mode (S-FLOW) ( P.330)
Adjust the temperature for driver,
passenger and rear seats sepa-
rately (“4-ZONE” mode) ( P.331)
Set Lexus Climate Concierge
( P.321)
■Windshield wiper de-icer (if equipped)
This feature is used to prevent ice from
building up on the windshield and wiper
blades.
The windshield de-icer will automatically
turn off after a while.
■Eco air conditioning mode
When Eco drive mode is selected using the
F
G
A
B
C
D
E
F
G
A
B
C
D
E
F
G
H

3806-3. Do-it-yourself maintenance
Radiator, con-
denser, inter-
cooler radiator
and intercooler
sub radiator
( P.389)

Tire inflation pres-
sure ( P.406)• Tire pressure gauge
•Compressed air
source
Washer fluid
( P.390)
• Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●Keep hands, clothi ng 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. Fuel fumes are
flammable.
ItemsParts and tools■When working near the electric cool-
ing fan or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION
ON mode, the electric cooling fan may
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( P.389)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting 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.

3836-3. Do-it-yourself maintenance
6
Maintenance and care
Fuse boxes (P.412)
Engine oil filler cap ( P.387)
Engine coolant reservoir ( P.388)
Intercooler coolant reservoir ( P.388)
Engine oil level dipstick ( P.386)
Brake fluid reservoir ( P.389)
Washer fluid tank ( P.390)
Radiator ( P.389)
Intercooler radiator ( P.389)
Electric cooling fan
Condenser ( P.389)
Intercooler sub radiator ( P.389)
For AWD models:
The engine oil level dipstick is locate d on the opposite side of the engine.
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
K
L