Page 347 of 652
GS450h_OM_OM30F70U_(U)
3475-2. Using the air conditioning system and defogger
5
Interior features
■Using the automatic mode
Select on the operation screen.
Select “REAR AUTO” on the
screen.
The air conditioning system will
operate, and air outlets and speed
will be set automatically.
When the rear seat heaters are set
to automatic mode, the system is
operated automatically according
to the set temperature, outside
temperature, etc.
Select to increase the temperature and to decrease the
temperature.
■Adjusting the temperature setting
Select on the operation screen.
Select (increase) or
(decrease) on the operation
screen.
The air conditioning system
switches between individual and
simultaneous modes each time
“3-ZONE” on the option control
screen is selected.
Changing the rear seat settings (with rear air conditioning sys-
tem)
1
2
3
1
2
Page 348 of 652
348
GS450h_OM_OM30F70U_(U)
5-2. Using the air conditioning system and defogger
■Disabling the switches on the rear armrest.
Select on the operation screen.
Select .
Rear seat heater switches ( P. 3 8 2 )
are also locked.
1
2
Page 351 of 652

GS450h_OM_OM30F70U_(U)
3515-2. 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 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 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 electronic key is in the vicinity
or if the smart access system with push-button start is used to unlock a passenger
door.
Settings for the electronic key and the co rresponding door can be changed. Contact
your Lexus dealer.
■Using automatic mode
●Fan speed is adjusted automatically according 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 imme-
diately after is pressed.
●Cool air may blow around the upper body even when the heater is on due to sun-
light.
■Humidity sensor
■Fogging up of the windows
●The windows will easily fog up when the humidity in the vehicle is high. Turning “A/C”
on 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.
A sensor, which detects humidity inside the
vehicle and the temperature of the wind-
shield, is provided to detect fog on the front
windscreen. Due to the sensor, when auto-
matic mode is set the air conditioning may
make the following controls:
●Changing the amount of air flow
●Changing the amount of air introduced from
outside when in outside air mode with the air
vents in the position
●Changing the settings of the air vents to
when the is set
Page 356 of 652
356
GS450h_OM_OM30F70U_(U)
5-2. Using the air conditioning system and defogger
Press .
The air conditioning system will operat e, and air outlets and fan speed will be
adjusted automatically.
“AUTO” will be displayed on the control panel.
Press “ ” on to increase the temperature and “” to decrease
the temperature.
When the rear seat heaters are set to “AUTO” mode, the system is operated auto-
matically according to the set temperature, outside temperature, etc.
Using automatic air conditioning system
1
2
Page 380 of 652
380
GS450h_OM_OM30F70U_(U)
5-5. Other interior features
Heated steering wheel
Turns the heater on/off
The indicator light comes on when the
heater is operating.
■Operating condition
The power switch is in ON mode.
■Timer
The heated steering wheel will automatically turn off after about 30 minutes.
: If equipped
The heated steering wheel heats the side grips of the steering wheel.
Page 382 of 652
382
GS450h_OM_OM30F70U_(U)
5-5. Other interior features
Seat heaters/seat ventilators
The seat can be warmed and air from the seat can improve ventilation.
Front seat heaters and ventilators/rear seat heaters (if equipped)
Seat heater switches
The indicator light (yellow) on the
switch comes on when the seat heater
is operating.
Seat ventilator switches (front
seats only)
The indicator light (green) on the
switch comes on when the seat venti-
lator is operating.
Level indicator lights
The seat heater temperature level or
the seat ventilator fan speed level (for
front seats only) is displayed.
“AUTO” indicator lights
Front seats
Rear seats
1
2
3
4
Page 383 of 652

GS450h_OM_OM30F70U_(U)
3835-5. Other interior features
5
Interior features
■Modes and indicators
The mode can be changed by pressing the switch.
*: When automatic mode is selected, the level automatically changes depending onthe air conditioning settings.
■The seat heaters/seat ventilators can be used when
The power switch is in ON mode.
■Automatic operation of the seat heater during Eco drive mode
Eco drive mode controls the heating operat ions and fan speed of the air conditioning
system to enhance fuel efficiency. If the driving mode select switch is switched to Eco
drive mode in cold temperatures, the seat heater may be automatically operated to
assist heating performance.
■Automatic operation during S-FLOW mode
The front seat heater and ventilator or the rear seat heater may automatically turn off
when S-FLOW mode is turned on during automatic mode. ( P. 3 4 9 )
■Button lock function (vehicles with rear control panel)
To prevent inadvertent operation, some buttons on the rear armrest can be locked.
( P. 3 5 9 )
Mode“AUTO” indicator lightLevel indicator lights
OffOffOff
Automatic*On3 to 1, or off
HiOff3
MidOff2
LoOff1
Page 384 of 652

384
GS450h_OM_OM30F70U_(U)
5-5. Other interior features
■When the switch is disabled (vehicles with rear control panel)
When the rear control panel switch cannot be operated even though the button lock
function is released, check whether the switch is disabled due to selecting
on Remote Touch screen. (P. 3 4 8 )
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the rear armrest can be turned off. ( P. 3 5 9 )
■Customization
The automatic mode settings for the front seat heaters and ventilators or the rear
seat heaters can be changed. (Customizable features: P. 599)
CAUTION
■Burns
●Use caution when seating the following pers ons in a seat with the seat heater on
to avoid the possibility of burns:
• 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.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary. Doing so may cause minor burns or
overheating.