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LEXUS RX 450HL (2019 year). Instruction - part 32

512

6-2. Using the air conditioning system and defogger

RX450h_RX450hL_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.

Prevent ice from building up on the windshield and wiper blades (if
equipped) (

P. 516)

Select to set S-FLOW mode (

P. 514)

■

Side display operation screen (Vehicles with a navigation system [12.3-inch
display])

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

indicator is turned off, the system will blow ambient temperature air

or heated air.

Adjust the temperature for driver, passenger and rear seats separately (“3-
ZONE” mode) (

P. 513)



Lexus Display Audio screen



Navigation system screen

3
4

5
6

513

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Using the automatic mode

Press the “AUTO” button or select “AUTO” on the air conditioning control
screen.

Press

to switch to automatic air intake mode. (if equipped)

The air conditioning system automatically switches between outside air
and recirculated air modes.
Adjust the temperature setting.
To stop the operation, press the “OFF” button.

■

Automatic mode indicator
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.

■

Adjusting the temperature for driver and passenger seats separately
(“DUAL” mode) (RX450h)
To turn on the “DUAL” mode, perform any of the following procedures:

●

Press “DUAL” button.

●

Adjust the temperature setting of the passenger side with the passenger
side temperature adjustment button.

The indicator comes on when the “DUAL” mode is on.

■

Adjusting the temperature for driver, passenger and rear seats separately
(“3-ZONE” mode) (RX450hL)
To turn on the “3-ZONE” mode, perform any of the following procedures:

●

Select “3-ZONE” on the air conditioning control screen.

●

Select “3-ZONE” on the side display operation screen. (Vehicles with a
navigation system [12.3-inch display])

●

Adjust the temperature setting of the passenger side with the passenger
side temperature adjustment button.

The indicator comes on when the “3-ZONE” mode is on.

Air conditioning controls

3
4

514

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S-FLOW mode
In S-FLOW mode, priority for the airflow is given to the front seats, reducing
the airflow and air conditioning effect on the rear seats. When in S-FLOW
mode, airflow from the rear air conditioning system is stopped. (RX450hL)
Operation in S-FLOW mode differs according to the following conditions:

• Priority is given to the driver’s seat only when: Manual S-FLOW mode:

When no passenger is judged to be in the front passenger seat.

Automatic S-FLOW mode: When no passengers are judged to be in the front
passenger seat or rear seats.

• Priority is given to the front seats when: Manual S-FLOW mode is selected

or no passengers are judged to be in the rear seats when in automatic S-
FLOW mode.

• S-FLOW mode will be disabled when: A passenger is judged to be in a rear

seat when in automatic S-FLOW mode.

Depending on the set temperature, operation in S-FLOW mode may not
change as described above.
When certain conditions are met and priority is given to the driver’s seat only,
the temperature indicator for the front passenger side will turn off.
How the system judges if a passenger is in the vehicle:

P. 518

The following S-FLOW modes are available:



Automatic S-FLOW mode

In this mode, when a passenger is judged to be in a rear seat, S-FLOW mode
will be automatically disabled.

The

indicator will illuminate when S-FLOW mode is enabled.

To enable/disable S-FLOW mode and enter manual S-FLOW mode, select

on the option control screen.
How the system judges if a passenger is in the vehicle:

P. 518



Manual S-FLOW mode

When

is selected, S-FLOW mode will be manually enabled/disabled.

The

indicator will illuminate when S-FLOW mode is enabled.

In manual S-FLOW mode, as the system does not judge if a passenger is in a rear

seat, S-FLOW mode will not be disabled automatically.
To disable S-FLOW mode automatically by opening and closing a rear door or

operating the rear air conditioning system (RX450hL), change to automatic S-

FLOW mode. (

P. 518)

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Press the “REAR” button or select

on the air conditioning control screen

to display the rear air conditioning control screen.

Adjust the temperature setting
Adjust the fan speed setting
Select to set auto mode on/off
Turn the fan off

■

Using the automatic mode

Select the “REAR AUTO”.
Adjust the temperature setting.
To stop the operation, select “REAR OFF”.

■

Automatic mode indicator
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.

Changing the rear seat settings (RX450hL)



Lexus Display Audio screen



Navigation system screen

2
3
4

2
3

516

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RX450h_RX450hL_U

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Switching between outside air and recirculated air modes



Type A

Press .

The mode switches between

(recirculated air mode) and

(outside

air mode) modes each time the button is pressed.



Type B

Press .

The mode switches between

(recirculated air mode), automatic and

(outside air mode) modes each time the button is pressed.
When the system is switched to automatic mode, the air conditioning system oper-

ates automatically.

■

Defogging the windshield
Defoggers are used to defog the windshield and front side windows.

Press .

Set the outside/recirculated air mode button to outside air mode if the recirculated

air mode is used. (It may switch automatically.)
To defog the windshield and the side windows early, turn the air flow and tempera-

ture up.

To return to the previous mode, press

again when the windshield is

defogged.

■

Defogging the rear window and outside rear view mirrors
Defoggers are used to defog the rear window and to remove raindrops, dew
and frost from the outside rear view mirrors.

Press .

The defoggers will automatically turn off after a period of time.

■

Windshield wiper de-icer (if equipped)
This feature is used to prevent ice from building up on the windshield and
wiper blades.
Select

on the option control screen.

When the windshield wiper de-icer is on,

is displayed on the air condition-

ing control screen.
The windshield wiper de-icer will automatically turn off after a period of time.

Other functions

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Location of air outlets
The air outlets and air volume
changes according to the selected
air flow mode.

■

Adjusting the position of and opening and closing the air outlets

Direct air flow to the left or right, up or down
Turn the knob to open or close the vent

Air outlets



Front side



Front center



Rear

518

6-2. Using the air conditioning system and defogger

RX450h_RX450hL_U

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Registering air conditioning settings to electronic keys

●

Unlocking the vehicle using an electronic key and turning the power switch to ON

mode will recall that key’s registered air conditioning settings.

●

When the power switch is turned off, the current air conditioning settings will automati-

cally be registered to the electronic key that was used to unlock the vehicle.

●

The system may not operate correctly if more than one electronic key is in the vicinity or

if the smart access system with push-button start is used to unlock a passenger door.

●

The doors that can recall the air conditioning 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.

■

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 warm or cool air is ready to flow immediately

after the “AUTO” button is pressed or “AUTO” is selected.

■

How the system judges if a passenger is in the vehicle when in S-FLOW mode
In S-FLOW mode, the system judges if a passenger is in the vehicle as follows:
• Front passenger seat: A passenger is judged to be in the front passenger seat when the

system detects an object on the front passenger seat, fastening of the front passenger

seat belt, changing of the set temperature for the front passenger seat or the opening

and closing of the front passenger door. (However, when only opening and closing of

the front passenger door is detected, the system will judge that a passenger is not in

the front passenger seat after the vehicle speed reaches approximately 12 mph (20

km/h) or more.)

• Rear seats (automatic S-FLOW mode only): A passenger is judged to be in a rear seat

when the system detects the opening and closing of a rear door or the operation of the

rear air conditioning system (RX450hL).

If a passenger is judged to be in the vehicle, the system will retain the judgement for a

certain amount of time after the power switch is turned off.

■

Operation of automatic S-FLOW mode
When the system is operating in automatic S-FLOW mode, if the system detects the

opening and closing of a rear door or the operation of the rear air conditioning system
(RX450hL), S-FLOW mode will be disabled. To enable S-FLOW mode, select

on the option control screen. (In this case, the system will operate in manual S-FLOW

mode.)

■

Changing from manual S-FLOW mode to automatic S-FLOW mode

Select

on the option control screen to disable S-FLOW mode.

Turn the power switch off.
Wait for 60 minutes or more and change the power switch to ON mode.

■

Using the voice command system
Air conditioning system can be operated using voice commands. For details, refer to the

“NAVIGATION SYSTEM OWNER’S MANUAL”.

2
3

519

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When the outside temperature exceeds 75

F (24C) and the air conditioning system

is on

●

In order to reduce the air conditioning power consumption, the air conditioning system

may switch to recirculated air mode automatically.

This may also reduce fuel consumption.

●

Recirculated air mode is selected as a default mode when the power switch is turned to

ON mode.

●

It is possible to switch to outside air mode at any time by pressing the outside/recircu-

lated air mode button.

■

Automatic mode for air intake control
In automatic mode, the system detects exhaust gas and other pollutants and automati-

cally switches between outside air and recirculated air modes.
When the dehumidification function is off, and the fan is operating, turning automatic

mode on will activate the dehumidification function.

■

Fogging up of the windows

●

The windows will easily fog up when the humidity in the vehicle is high. Selecting “A/C”

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.

■

Windshield fog detection function
When automatic mode is set, the humidity sensor (

P. 521) detects fog on the wind-

shield and controls the air conditioning system to prevent fog.

■

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 air mode. This is effective in preventing out-

side air from entering the vehicle interior. During cooling operation, setting the

recirculated air mode will also cool the vehicle interior effectively.

●

Outside/recirculated air mode may automatically 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 system 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 performance, perform the following operations:
• Adjust the fan speed

• Turn off Eco drive mode

520

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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 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 delayed for a short period of time immediately

after the air conditioning system is started in automatic mode.

■

Air conditioning filter
P. 625

■

Customization
Some functions can be customized (

P. 736)

WARNING

■

To prevent the windshield from fogging up

●

Do not use

during cool air operation in extremely humid weather. The differ-

ence 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.

■

To prevent burns

●

Do not touch the rear view mirror surfaces when the outside rear view mirror defog-

gers are on.

●

Do not touch the glass at lower part of the windshield or to the side of the front pillars

when the windshield wiper de-icer is on. (if equipped)

●

Do not place anything on the instrument

panel which may cover the air outlets. Other-

wise, air flow may be obstructed, preventing

the windshield defoggers from defogging.

521

6-2. Using the air conditioning system and defogger

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NOTICE

■

Humidity sensor

■

To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the hybrid sys-

tem is off.

In order to detect fog on the windshield, a sen-

sor which monitors the temperature of the

windshield, the surround humidity, etc. is

installed. (

P. 519)

Follow these points to avoid damaging the sen-

sor:

●

Do not disassemble the sensor

●

Do not spray the glass cleaner on the sensor

or subject it to strong impacts

●

Do not stick anything on the sensor

522

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Adjusting the temperature setting

Press

to increase the temperature and

to decrease the tem-

perature.

■

Adjusting the fan speed setting
Press

to increase the fan speed and

to decrease the fan speed.

Press the “OFF” button to turn the fan off.

Rear automatic air conditioning system (RX450hL)

Air outlets and fan speed are automatically adjusted according to the tem-
perature setting.

Control panel

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Change the airflow mode
To change the air outlets, press

The air outlets used are switched
each time the button is pressed.

Air flows to the upper body.
Air flows to the upper body and
feet.
Air flows to the feet.

524

6-2. Using the air conditioning system and defogger

RX450h_RX450hL_U

■

Using the automatic mode

Press the “AUTO” button

Adjust the temperature setting.
To stop the operation, press the “OFF” button.

■

Automatic mode indicator
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.

■

Location of air outlets
The air outlets and air volume
changes according to the selected
air flow mode.

■

Adjusting the position of and opening and closing the air outlets
Adjusting the position of and open-
ing and closing the air outlets

Direct air flow to the left or right,
up or down
Turn the knob fully to the back of
the vehicle to close the vent

Air conditioning controls

Air outlets

2
3

NOTICE

■

To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the hybrid sys-

tem is off.

525

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Heated steering wheel



/seat heaters



/seat ventila-

tors



: If equipped

Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good ventilation using
a fan built into the seats.

WARNING

●

Care should be taken to prevent injury if anyone in the following categories comes in

contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically challenged

• Persons with sensitive skin

• Persons who are fatigued

• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold

remedies, etc.)

●

Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.

• Do not use seat heater more than necessary.

NOTICE

●

Do not put heavy objects that have an uneven surface on the seat and do not stick

sharp objects (needles, nails, etc.) into the seat.

●

To prevent 12-volt battery discharge, do not use the functions when the hybrid system

is off.

526

6-2. Using the air conditioning system and defogger

RX450h_RX450hL_U

Turns the heated steering wheel on/off

The indicator light comes on when the

heated steering wheel is operating.

■

Operation condition
The heated steering wheel can be used when the power switch is in ON mode.

■

Timer
The heated steering wheel will automatically turn off after about 30 minutes.

When any switch is pressed, the system is set to automatic mode and the
“AUTO” indicator (green) lights up.
Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)

 Mid (2 segments

lit)

 Lo (1 segment lit)  Off

The level indicator (amber) lights up

during operation.

■

Operation condition
The front seat heaters can be used when the power switch is in ON mode.

■

When the air conditioning system is operating in S-FLOW mode
If a passenger is not detected in the front passenger seat, the seat heater of the front pas-

senger’s seat will be turned off if on. (

P. 514)

■

Customization
Some functions can be customized. (

P. 736)

Heated steering wheel

Front seat heaters

Level
indicator

“AUTO”
indicator

527

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RX450h_RX450hL_U

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Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)

 Mid (2 segments

lit)

 Lo (1 segment lit)  Off

The level indicator (amber) lights up

during operation.

■

Operation condition
The rear seat heaters can be used when the power switch is in ON mode.

When any switch is pressed, the system
is set to automatic mode and the
“AUTO” indicator (green) lights up.
Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)

 Mid (2 segments

lit)

 Lo (1 segment lit)  Off

The level indicator (green) lights up

during operation.

■

Operation condition
The seat ventilators can be used when the power switch is in ON mode.

■

When the air conditioning system is operating in S-FLOW mode
If a passenger is not detected in the front passenger seat, the seat heater of the front pas-

senger’s seat will be turned off if on. (

P. 514)

■

Customization
Some functions can be customized. (

P. 736)

Rear seat heaters

Level indicator

Seat ventilators

Level
indicator

“AUTO”
indicator

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