air conditioning LEXUS UX250H 2019 Owner's Manual

2825-3. Using the air conditioning system and defogger
In S-FLOW mode, priority for the air-
flow is given to the front seats, reducing
the airflow and air conditioning effect
on the rear seats.
The following S-FLOW modes are
available:
Automatic S-FLOW mode
When a rear passenger is determined
to be in the vehicle, S-FLOW mode will
be automatically disabled.
The indicator will illuminate on the air con-
ditioning control screen when S-FLOW
mode is enabled.
To enable/disable S-FLOW mode and
enter manual S-FLOW mode, select the S-
FLOW mode switch ( P.280).
Manual S-FLOW mode
When the S-FLOW mode switch is
selected, S-FLOW mode will be manu-
ally enabled/disabled.
The indicator will illuminate on the air con-
ditioning control screen when S-FLOW
mode is enabled.
The system does not determine whether a
passenger is in the rear seats by the open-
ing and closing of a rear door, so S-FLOW mode cannot be automatically disabled.
To automatically disable S-FLOW mode by
opening and closing a rear door, switch to
automatic S-FLOW mode.
■S-FLOW air conditioning control
Operation of S-FLOW mode changes
according to the following conditions.
However, depending on the set tem-
perature and air conditioning load is
high, the operation may not change.
 Driver seat priority:
• When the system determines there is no
passenger in the front passenger seat in
manual S-FLOW mode
• When the system determines there are no passengers in the front passenger
seat and rear seats in automatic S-
FLOW mode
The airflow to the front passenger seat and
rear seat stops and the front passenger
temperature display turns off.
 Front seat priority:
When the system determines there are no
passengers in the rear seats
S-FLOW disabled:
When the system determines there is a
passenger in the rear seats
■Passenger presence determination in S-
FLOW mode
The system determines that there is a pas-
senger in any of the following situations.
If a passenger is judged to be in the vehicle,
the system will retain the judgment for a
certain amount of time after the power
switch is turned off.
NOTICE
●Do not stick anything on the sensor
S-FLOW mode

2835-3. Using the air conditioning system and defogger
5
Interior features
Front passenger seat
• When the front passenger’s door is opened and closed
• When a passenger is sitting on the front passenger seat
• When the front passenger side seat belt
is fastened
• When the front passenger seat set tem- perature is changed
After only the front passenger side door is
opened and closed, when the vehicle is
driven at 20 km/h (12 mph) or more, the
system determines that there is no passen-
ger in the front passenger seat.
Rear seats
When a rear door is opened and closed
■Operation of automatic S-FLOW mode
When the system is operating in S-FLOW
mode, if a rear door is opened and then
closed, S-FLOW mode will be disabled. To
enable S-FLOW mode, select the S-FLOW
mode switch. In this case, the system
switches to manual S-FLOW mode.
■Changing from manual S-FLOW mode
to automatic S-FLOW mode
1 Select the S-FLOW mode switch to dis-
able S-FLOW mode
2 Turn the power switch off.
3 After 60 minutes have elapsed, change
the power switch to ON.
To turn on the “DUAL” mode, perform
any of the following procedures:
Select “DUAL” on the sub function
menu. ( P.279)
 Select “DUAL” on the option con-
trol screen.
 Adjust the front passenger’s side
temperature setting.
The indicator comes on when the “DUAL”
mode is on.
■Location of air outlets
The air outlets and air volume changes
according to the selected air flow
mode.
■Adjusting the position of and open-
ing and closing the air outlets
Front
Direct air flow to the left or right, up or
down
Turn the knob to open or close the vent
Adjusting the temperature for
driver front and passenger seats
separately (“DUAL” mode)
Air outlet layout and operations

2845-3. Using the air conditioning system and defogger
1Open the outlet
2 Close the outlet
Rear
1 Direct air flow to the left or right, up
or down
2 Turn the knob to open or close the
vent
■Certification
For vehicles sold in the U.S.A.
For vehicles sold in Canada

2855-3. Using the air conditioning system and defogger
5
Interior features
WARNING
■To prevent the windshield defogger
from operating improperly
Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers
from defogging.

2865-3. Using the air conditioning system and defogger
*: If equipped
Turns the heated steering wheel on/off
Each time the switch is pressed, the opera-
tion condition changes as follows.
AUTO (lit)  Hi (2 segments lit)  Lo (1
segment lit)  Off
The AUTO indicator and/or level indi-
cator illuminates during operation.
■The heated steering wheel can be used
when
The power switch is in ON.
■Customization
Steering wheel heating preference in auto-
matic mode can be changed. (Customiz-
able features: P.444)
Heated steering wheel*/seat
h
eaters*/seat ventilators*
 Heated steering wheel
Warms up the grip of the steering
wheel
 Seat heaters
Warm up the seat upholstery
 Seat ventilators
Maintain good airflow on the seat
upholstery by sucking air into the
seats
Press the “MENU” button on the
Remote Touch and select “Climate”
to display the air conditioning con-
trol screen. Then, select on the
sub menu ( P.279) to display the
heated steering wheel/seat heat-
ers/seat ventilators control screen.
WARNING
■To prevent minor burn injuries
Care should be taken if anyone in the fol-
lowing categories comes in contact with
the steering wheel or seats when the
heater is on:
●Babies, small children, the elderly, the
sick and the phys ically challenged
●Persons with sensitive skin
●Persons who are fatigued
●Persons who have taken alcohol or
drugs that induce sleep (sleeping
drugs, cold remedies, etc.)
NOTICE
■To prevent damage to the seat heat-
ers and seat ventilators
Do not put heavy objects that have an
uneven surface on the seat and do not
stick sharp objects (n eedles, nails, etc.)
into the seat.
■To prevent battery discharge
Do not use the functions when the hybrid
system is off.
Heated steering wheel
A
B

2875-3. Using the air conditioning system and defogger
5
Interior features
■Seat heaters
Turns the seat heaters on/off
Each time the switch is pressed, the opera-
tion condition changes as follows.
AUTO (lit)  Hi (3 segments lit)  Mid
(2 segments lit)  Lo (1 segment lit) 
Off
The AUTO indicator and/or level indi-
cator illuminates during operation.
■Seat ventilators
Turns the seat ventilators on/off
Each time the switch is pressed, the opera-
tion condition changes as follows.
AUTO (lit)  Hi (3 segments lit)  Mid
(2 segments lit)  Lo (1 segment lit) 
Off
The AUTO indicator and/or level indi-
cator illuminates during operation.
■The seat ventilators can be used when
The power switch is in ON.
■Air conditioning system-linked control
mode
When the seat ventilator fan speed level is
Hi, the seat ventilator fan speed becomes
higher according to the fan speed of the air
conditioning system.
■Customization
Settings for the seat heaters and ventilators
can be changed. (Customizable features:
 P.443)
■Main display
Using the touchpad of the Remote
Touch, select the button on the screen.
to can be adjusted by perform-
ing the following operations.
Flick operation: Move the pointer to
the desired item and flick the touchpad
Seat heaters and ventilators
(front seats)
A
B
A
B
WARNING
■To prevent causes of overheating and
minor burn injuries
Observe the following precautions when
using the seat heaters.
●Do not cover the seat with a blanket or
cushion when using the seat heater.
●Do not use seat heater more than nec-
essary.
Control screen
AC

2885-3. Using the air conditioning system and defogger
up or down.
The item can be adjusted by one level.
Trace operation: After selecting the
desired item, trace the pad surface.
The item can be adjusted by the amount
that you trace.
Trace operation cannot be used while driv-
ing.
Adjust the seat ventilator fan speed
level
The seat ventilator can be adjusted in 3 lev-
els.
When the seat ventilator is operated, the
fan speed level is disp layed on the screen.
Adjust the seat heater temperature
level
The seat heater can be adjusted in 3 levels.
When the seat heater is operated, the tem-
perature level is displayed on the screen.
Adjust the heated steering wheel
temperature level
The heated steering wheel can be adjusted
in 2 levels.
When the heated steering wheel is oper-
ated, the temperature level is displayed on
the screen.
Automatic mode on/off indicators
When the automatic mode is on, the indi-
cator illuminates on the screen.
Sub function menu
When the sub function button on the
Remote Touch is pressed, the following
functions can be set to automatic mode.
: Left-hand side seat heater/seat
ventilator
: Heated steering wheel
: Right-hand side seat heater/seat
ventilator
■Side display (10. 3-inch display
model)
Display the air conditioning control
screen ( P.280)
Adjust the seat heater temperature
level
Each time the switch is selected, the tem-
perature level and level indicator (orange)
change as follows:
AUTO  Hi  Mid  Lo  Off
Adjust the seat ventilator fan speed
level
Each time the switch is selected, the fan
speed level and level indicator (blue)
change as follows:
AUTO  Hi  Mid  Lo  Off
Adjust the heated steering wheel
temperature level
Each time the switch is selected, the tem-
perature level and le vel indicator change
A
B
C
D
E
A
B
C
D

2895-3. Using the air conditioning system and defogger
5
Interior features
as follows:
AUTO  Hi  Lo  Off

321
6
6
Maintenance and care
Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................ 322
Cleaning and protecting the vehi- cle interior ................................. 325
6-2. Maintenance Maintenance requirements .. 328
General maintenance ............. 329
Emission inspection and mainte- nance (I/M) programs .......... 331
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................ 333
Hood............................................... 335
Positioning a floor jack............ 336
Engine compartment............... 337
12-volt battery............................. 342
Tires ................................................ 345
Replacing the tire ...................... 355
Tire inflation pressure ............... 361
Wheels........................................... 363
Air conditioning filter...............364
Cleaning the hybrid battery (trac- tion battery) air intake vent and
filter .............................................. 365
Electronic key battery ............. 368
Checking and replacing fuses ........................................................ 370
Headlight aim.............................. 372
Light bulbs .................................... 374

3246-1. Maintenance and care
WARNING
●Lexus Safety System+2.0
●BSM (if equipped)
●RCTA (if equipped)
●PKSB (if equipped)NOTICE
■To prevent paint deterioration and
corrosion on the body and compo-
nents (aluminum wheels etc.)
●Wash the vehicle immediately in the
following cases:
• After driving near the sea coast
• After driving on salted roads
• If coal tar or tree sap is present on the paint surface
• If dead insects, insect droppings or bird droppings are present on the
paint surface
• After driving in an area contaminated with soot, oily smoke, mine dust, iron
powder or chemical substances
• If the vehicle becomes heavily soiled with dust or mud
• If liquids such as benzene and gasoline are spilled on the paint surface
●If the paint is chip ped or scratched,
have it repaired immediately.
●To prevent the wheels from corroding,
remove any dirt and store in a place
with low humidity when storing the
wheels.
■Cleaning the exterior lights
●Wash carefully. Do not use organic
substances or scrub with a hard brush.
This may damage the surfaces of the
lights.
●Do not apply wax to the surfaces of the
lights.
Wax may cause damage to the lenses.
■When using an automatic car wash
(vehicles with rain-sensing windshield
wipers)
Set the wiper switch to the off position.
If the wiper switch is in AUTO, the wipers
may operate and the wiper blades may
be damaged.
■When using a high pressure car wash
●When washing the vehicle, do not let
water of the high pressure washer hit
directly or the vicinity of the camera.
Due to the shock from the high pres-
sure water, it is possible the device may
not operate as normal.
●Do not bring the nozzle tip close to
boots (rubber or resin manufactured
cover), connectors or the following
parts. The parts may be damaged if
they come into contact with high-pres-
sure water.
• Traction related parts
• Steering parts
• Suspension parts
• Brake parts
●Keep the cleaning nozzle at least 11.9
in. (30 cm) away from the vehicle
body. Otherwise resin section, such as
moldings and bumpers, may be
deformed and damaged. Also, do not
continuously hold the nozzle in the
same place.
●Do not spray the lower part of the
windshield continuously. If water
enters the air conditioning system
intake located near the lower part of
the windshield, the air conditioning
system may not operate correctly.