2019 LEXUS UX250H heater

17Pictorial index
■Switches
VSC off switch......................................................................................................... P.257
Driving mode select switch .................................................................................P.255
Power back door switch
*....................................................................................... P.115
Fuel filler door opener switch..............................................................................P.190
Instrument panel light control switches .....................................................P.80, 86
Odometer/trip meter and trip meter reset button ................................P.80, 86
Head-up display switch
*..........................................................................................P.93
ASC switch
*.............................................................................................................. P.176
Seat ventilator switches
*.....................................................................................P.287
Seat heater switches
*...........................................................................................P.287
Heated steering wheel switch
*..........................................................................P.286
*:If equipped
A
B
C
D
E
F
G
H
I
J
K

631-4. Hybrid system
1
For safety and security
charged.
*: When the hybrid battery (traction bat-tery) requires charging or the engine is
warming up, etc., the gasoline engine will
not automatically stop. ( P.63)
■During normal driving
The gasoline engine is predominantly
used. The electric motor (traction
motor) charges the hybrid battery
(traction battery) as necessary.
■When accelerating sharply
When the accelerator pedal is
depressed heavily, the power of the
hybrid battery (traction battery) is
added to that of the gasoline engine via
the electric motor (traction motor).
■When braking (regenerative brak-
ing)
The wheels operate the electric motor
(traction motor) as a power generator,
and the hybrid battery (traction bat-
tery) is charged.
■Regenerative braking
In the following situations, kinetic energy is
converted to electric energy and decelera-
tion force can be obta ined in conjunction
with the recharging of the hybrid battery
(traction battery).
●The accelerator pedal is released while
driving with the shift lever in D or S.
●The brake pedal is depressed while driv-
ing with the shift lever in D or S.
■EV indicator
The EV indicator comes on when the vehi-
cle is driven using only the electric motor
(traction motor) or th e gasoline engine is
stopped.
■Conditions in which the gasoline engine
may not stop
The gasoline engine starts and stops auto-
matically. However, it may not stop auto-
matically in the following conditions
*:
●During gasoline engine warm-up
●During hybrid battery (traction battery)
charging
●When the temperature of the hybrid bat-
tery (traction battery) is high or low
●When the heater is switched on
*: Depending on the circumstances, the gasoline engine may also not stop auto-
matically in other situations.
■Charging the hybrid battery (traction
battery)
As the gasoline engine charges the hybrid
battery (traction battery), the battery does
not need to be charged from an outside
source. However, if the vehicle is left parked
for a long time the hybrid battery (traction
battery) will slowly discharge. For this rea-
son, be sure to drive the vehicle at least
once every few months for at least 30 min-
utes or 10 miles (16 km ). If the hybrid bat-
tery (traction battery) becomes fully
discharged and you are unable to start the
hybrid system, contact your Lexus dealer.
■Charging the 12-volt battery
 P.408
■After the 12-volt battery has discharged
or when the terminal has been removed
and installed during exchange, etc.
The gasoline engine may not stop even if
the vehicle is being driven by the hybrid bat-
tery (traction battery). If this continues for a
few days, contact your Lexus dealer.

2624-6. Driving tips
Control and maintain the vehicle at a
constant speed. Before stopping at a
toll booth or similar, allow plenty of
time to release the accelerator and
gently apply the brakes. A greater
amount of electrical energy can be
regenerated when slowing down.
Use the air conditioning only when
necessary. Doing so can help reduce
excessive gasoline consumption.
In summer: When the ambient tem-
perature is high, use the recirculated
air mode. Doing so will help to reduce
the burden on the air conditioning sys-
tem and reduce fuel consumption as
well.
In winter: Because the gasoline engine
will not automatically cut out until it and
the interior of the vehicle are warm, it
will consume fuel. Also, fuel consump-
tion can be improved by avoiding over-
use of the heater.
Make sure to check the tire inflation
pressure frequently. Improper tire infla-
tion pressure can cause poor fuel
economy.
Also, as snow tires can cause large
amounts of friction, their use on dry
roads can lead to poor fuel economy.
Use tires that are appropriate for the
season. Carrying heavy luggage will lead to
poor fuel economy. Avoid carrying
unnecessary luggage.
Installing a large
roof rack will also cause poor fuel
economy.
Since the gasoline engine starts up and
cuts out automatically when cold,
warming up the engine is unnecessary.
Moreover, frequently driving short dis-
tances will cause the engine to repeat-
edly warm up, which can lead to excess
fuel consumption.
Highway driving
Air conditioning
Checking tire inflation pressure
Luggage
Warming up before driving

2745-2. Lexus Climate Concierge
5-2.Lexus Climate Concierge
Select
The indicator on the Lexus Climate Con-
cierge control screen illuminates, and the
automatic air conditioning system, seat
heaters and ventilators (if equipped), and
heated steering wheel (if equipped) oper-
ate in automatic mode.
If any of the system is operated manually,
the indicator turns off. However, all other
functions continue to operate in automatic
mode.
■When using the Lexus Climate Con-
cierge
Lexus Climate Concierge can be operated
on the sub function menu or option control
screen. ( P.279)
■Automatic air conditioning system
( P.276)
The temperature can be adjusted inde-
pendently for the driver seat and pas-
senger seat.
■Seat heaters and ventilators (if
equipped) ( P.286)
Heating or ventilation is automatically
selected according to the set tempera-
ture of the air conditioning system, the
outside temperature, etc.
The seat heater and ventilator of the
front passenger seat operate in auto-
matic mode if a passenger is detected.
■Heated steering wheel (if
equipped) ( P.286)
Heated steering wheel operates auto-
matically according to the set tempera-
ture of the air conditioning system, the
outside temperature, etc.
Lexus Climate Concierge
The seat heaters (if equipped), seat
ventilators (if equipped) and heated
steering wheel (if equipped) are
each automatically controlled
according to the set temperature of
the air conditioning system, the out-
side and cabin temperature, etc.
Lexus Climate Concierge allows a
comfortable condition to be main-
tained without adjusting each sys-
tem.
Press the “MENU” button on the
Remote Touch and select “Climate”
to display the air conditioning con-
trol screen. Then, select to dis-
play the Lexus Climate Concierge
control screen.
Turning on Lexus Climate Con-
cierge
Operation of each system

2755-2. Lexus Climate Concierge
5
Interior features
■Seat heater/ventilator operation
When automatic mode is selected using the
seat heater/ventilator switch, passenger
detection is not performed.

2795-3. Using the air conditioning system and defogger
5
Interior features
diately after the air conditioning system is
started in automatic mode.
■Air conditioning filter
 P.364
■Customization
Settings (e.g. A/C automatic mode switch
operation) can be changed.
(Customizable features: P.443)
■Main control screen
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
up or down.
The item can be adjusted by one level.
Trace operation: After selecting the
desired item, slide your finger up or
down.
The item can be adjusted by the amount
that you trace.
Trace operation cannot be used while driv-
ing.
Sub menu
Selecting the sub menu item to switch the
main screen.
: Display the air conditioning control
screen
: Display the heated steering
wheel/seat heater/sea t ventilator control
screen (if equipped)
: Display the Lexus Climate Con-
cierge control screen
: Display the option control screen
Adjust the left-hand side tempera-
ture setting
Adjust the fan speed setting
Select the air flow mode
: Air flows to the upper body
: Air flows to the upper body and feet
WARNING
■To prevent the windshield from fog-
ging up
Do not use the windshield defogger
switch during cool air operation in
extremely humid weather. The difference
between the temperature of the outside
air and that of the windshield can cause
the outer surface of the windshield to fog
up, blocking your vision.
■When the outside rear view mirror
defoggers are operating
Do not touch the outside rear view mir-
ror surfaces, as they can become very
hot and burn you.
NOTICE
■To prevent 12-volt battery discharge
Do not leave the air conditioning system
on longer than necessary when the
hybrid system is off.
Air conditioning control screen
BE
A
B
C
D

2805-3. Using the air conditioning system and defogger
: Air flows to the feet
: Air flows to the feet and the wind-
shield defogger operates
Adjust the right-hand side tem-
perature setting
Function on/off indicators
When the function is on, the indicator illu-
minates on the control screen.
Sub function menu
When the sub function button on the
Remote Touch is pressed, the following
functions can be switched on and off.
: Set Lexus Climate Concierge
(  P.274)
“AUTO”: Set automatic mode on/off
(  P.281)
“OFF”: Turn the fan off
“A/C”: Set cooling and dehumidification
function
“DUAL”: Adjust the temperature for driver
and front passenger seats separately
(“DUAL” mode) ( P.283)
: Set eco air conditioning mode
■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.
Set Lexus Climate Concierge
( P.274)
Adjusting the temperature for
driver and front passenger seats
separately (“DUAL” mode)
( P.283)
Set eco air conditioning mode
Air conditioning and heater output is lim-
ited to prioritize fuel economy.
Cooling and dehumidification func-
tion
Prevent ice from building up on the
windshield and wiper blades
(Windshield wiper de-icer) (if
equipped)
Select S-FLOW mode ( P.282)
■Side display (10.3-inch display
model)
Display the heated steering
wheel/seat heaters/seat ventilators
E
F
G
A
B
C
D
E
F
A

2815-3. Using the air conditioning system and defogger
5
Interior features
control screen (if equipped)
(P.288)
Adjust the left-hand side tempera-
ture setting
Adjust the fan speed setting
Adjust the right-hand side tem-
perature setting
Set cooling and dehumidification
function on/off
Adjust the temperature for the
driver’s and front passenger’s seats
separately (“DUAL” mode)
( P.283)
Select the air flow mode
■Windshield wiper de-icer (if equipped)
This feature is used to prevent ice from
building up on the wi ndshield and wiper
blades.
The windshield wiper de-icer will automati-
cally turn off after a period of time.
■Eco air conditioning mode
When Eco drive mode is selected using the
driving mode select switch, eco air condi-
tioning mode turns on.
When a driving mode other than Eco drive
mode is selected, eco air conditioning
mode may turn off.
1Press the automatic mode switch or
select “AUTO” on the sub function
menu. ( P.279)
2
Adjust the temperature setting.
3
To stop the operation, press the off
switch or select “Off” on the sub
function menu.
If the fan speed setting or air flow
modes are operated, the automatic
mode indicator goes off. However,
automatic mode for functions other
than that operated is maintained.
■Using automatic mode
Fan speed is adjusted automatically accord-
ing to the temperature setting and the
ambient conditions.
Therefore, the fan may stop for a while until
warm or cool air is ready to flow immedi-
ately after the automatic mode switch is
pressed or “AUTO” is selected.
Cool air may blow around the upper body
even when the heater is on due to sunlight.
■Windshield fog detection function
When automatic mode is set, the humidity
sensor detects fog on the windshield and
controls the air condit ioning system to pre-
vent fog.
WARNING
■To prevent burns (vehicles with wind-
shield wiper de-icer)
Do not touch the glass at lower part of
the windshield or to the side of the front
pillars when the wind shield wiper de-icer
is on.
B
C
D
E
F
G
Using automatic mode
NOTICE
■Humidity sensor
In order to detect fog on the windshield,
a sensor which monitors the temperature
of the windshield, the surround humidity,
etc., is installed.
Follow these points to avoid damaging
the sensor:
●Do not disassemble the sensor
●Do not spray the glass cleaner on the
sensor or subject it to strong impacts