air condition LEXUS GS300H 2019 Service Manual

3575-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
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.
●Vehicles with windshield wiper de-icer: Do not touch the glass at lower part of the
windshield or to the side of the front pilla rs when the windshield wiper de-icer is on.
■nanoe generator (if equipped)
Do not disassemble or repair the generator because it contains high voltage parts.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer if the generator needs repair.
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.
■To prevent damage to the nanoe  (if equipped)
Do not insert anything into the driver’s side vent, attach anything to it, or use sprays
around the driver’s side vent. These things may cause the generator not to work prop- erly.
●Do not place anything on the instrument
panel which may cover the air outlets. Other- wise, air flow may be obstructed, preventingthe windshield defoggers from defogging.

3585-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30F92E_(EE)
Rear air conditioning system
■Adjusting the temperature setting
Press “ ” on to increase the temperature and “” to decrease the
temperature.
: If equipped
Air outlets and fan speed are automatically adjusted according to the tem-
perature setting.
Control panel
Set automatic mode on/off
Turn the fan off
Change the airflow mode
Adjust the temperature setting
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2
3
4

3595-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
■Changing the air outlets
Press .
The air outlets change as follo ws each time is pressed.
: Air flows to the upper body.
: Air flows to the upper body and feet.
: Air flows to the feet.
Press .
The air conditioning system will operate, and air outlets and fan speed will be adjusted automatically.
“AUTO” will be displaye d on the control panel.
Adjust the temperature setting.
When the rear seat heaters are set to “AUTO” mode, the system is operated automat-
ically according to the set temperature, outside temperature, etc.
To stop the operation, press the “OFF” button.
■Location of air outlets
The air outlets and air volume
changes according to the selected
air flow mode.
Using automatic air conditioning system
Air outlets
1
2

3605-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30F92E_(EE)
■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.
■Button lock function
■Rear control panel illumination off function
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2
To prevent inadvertent operation, the buttons on
the rear armrest can be locked. Press
until you hear a beep to lock the buttons. Press-
ing again until you hear a beep will
release the lock.
The indicator appears on the display when the buttons are locked.
Control panel illumination on the rear armrest
can be turned off. Press until you hear a
beep to turn the illumination off. Pressing
again until you hear a beep will turn the illumina-
tion on.
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.

361
5
5-2. Using the air conditioning system and defogger
Interior features
GS450h_300h_OM_OM30F92E_(EE)
Heated steering wheel/seat heaters/seat ventilators
: If equipped
Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat vent ilators maintain good airflow by blow-
ing air from 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
●To prevent damage to the seat heaters/seat ventilators, do not put heavy objects thathave 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 systemis off.

3625-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30F92E_(EE)
Turns the heated steering wheel on/off
The indicator light comes on when the heater is operating.
●The heated steering wheel can be used when the power switch is in ON mode.
●The heated steering wheel will automatically turn off after about 30 minutes.
■Front seat heaters and ventilators (if equipped)/rear seat heaters (if
equipped)
Seat heater switches
The indicator light (yellow) on the switch comes on when the seat heater is operat- ing.
Seat ventilator switches (front seats only)
The indicator light (green) on the switch co mes on when the seat ventilator is oper-
ating.
Level indicator lights
The seat heater temperature level or the seat ventilator fan speed level (for front
seats only) is displayed.
“AUTO” indicator lights
Heated steering wheel (if equipped)
Seat heaters/seat ventilators
Front seatsRear seats
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4

3635-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
●Modes and indicators
The mode can be changed by pressing the switch.
*: When automatic mode is selected, the leve l automatically changes depending on the
air conditioning settings.
■Seat heaters (without seat ventilators) (if equipped)
Seat heater switches
Level indicator lights
The seat heater temperature level is
displayed.
●Modes and indicators
The mode changes each time the switch is pressed as follows:
*: The mode changes automatically depending on the amount of time that has elapsed.
The amount of time until the mode changes varies depending on the interior tempera-
ture when the seat heater was operated and other factors.
Mode“AUTO” indicator lightLevel indicator lights
OffOffOff
Automatic*On3 to 1, or off
HiOff3
MidOff2
LoOff1
1
2
ModeLevel indicator lightsAutomatic operation*
OffOff
Hi3Hi  Mid  Lo
Mid2Mid  Lo
Lo1Lo

3645-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30F92E_(EE)
■Seat ventilators (without seat heaters) (if equipped)
Seat ventilator switches
Level indicator lights
The seat ventilator fan speed level is displayed.
●Modes and indicators
The mode changes each time the switch is pressed as follows:
■The seat heaters/seat ventilators can be used when
The power switch is in ON mode.
■Seat heater control (vehicles without automatic mode)
The seat heater automatically changes operatio ns. If the power switch is turned off while the seat heater is operating, the starting operation of the heater differs depending on the
amount of time that elapses before it is turned back on.
■Automatic operation of the seat heater during Eco drive mode
Eco drive mode controls the heating operations and fan speed of the air conditioning system to enhance fuel efficiency. If the driv ing mode select switch is switched to Eco drive mode in cold temperatures, the seat heater may be automatically operated to assist
heating performance.
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2
ModeLevel indicator lights
OffOff
Hi3
Mid2
Lo1
Current operation
Starting operation mode and amount of time elapsed
until power switch in ON mode
0 to 15 minutesOver 15 minutes
HiHiHi
MidMidHi
LoLoHi

3655-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
■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. 347)
■Button lock function (vehicles with rear control panel)
To prevent inadvertent operation, some bu ttons on the rear armrest can be locked. ( P. 360)
■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 sw itch is disabled due to selecting on
Remote Touch screen. ( P. 353)
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the rear armrest can be turned off. ( P. 360)
■Customization
The automatic operation of the front seat heaters (without seat ventilators) and the auto- matic mode settings for the front seat heaters and ventilators or the rear seat heaters canbe changed. (Customizable features: P. 572)

3875-5. Using the other interior features
5
Interior features
GS450h_300h_OM_OM30F92E_(EE)
WARNING
■For your safety
●Please drive safely. The function of this system is to assist you in making the Emergency Call in case of
accidents as traffic accidents or sudden medi cal emergencies, and it does not protect the driver or the passengers in any way. Plea se drive safely and fasten your seatbelts at all times for your safety.
●In case of an emergency, make lives the top priority.
●If you smell anything burning or another unus ual smell, do not stay inside the vehicle and evacuate to a safe area immediately.
●Since the system detects shocks, the automatic reporting may not always occur syn-chronized with the operation of the airbag system. (If the vehicle is bumped frombehind, etc.)
●The airbag may not inflate even in case of an accident, if it does not involve highimpact. In such cases, the system may not make emergency calls automatically. Thesystem may also not make automatic emergency calls even if the airbag has been
inflated. If any of these should occur, plea se report to the Public Safety Answering Point (PSAP) by operating the “SOS” button.
●For safety, do not make the Emergency Call while driving.
Making calls during driving may cause mish andling of the steering wheel, which may lead to unexpected accidents.Stop the vehicle and confirm the safety of the area before making the Emergency
Call.
●When changing fuses, please use fuses that correspond to the described standard. If you use fuses other than those described, it may cause ignition or smoke in the cir-
cuit and may lead to a fire.
●Using the system while there is smoke or an unusual smell may cause a fire. Stop using the system immediately and consult any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
NOTICE
■To prevent damage
Do not pour any liquid on to the “SOS” button panel etc. and make any impact to it.
■If the “SOS” button panel malfunctions
It may not be able to make the Emergency Call or inform you of the correct condition
of the system. If the “SOS” button panel has been broken, please consult any autho- rized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■If there is any malfunction of the speaker or the microphone during the Emergency
Call or the Manual Maintenance Check
You will not be able to communicate with the Public Safety Answering Point (PSAP) operator.
If any of this equipment has been broken, please consult any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.