2015 Lexus GS200t heating

4035-2. Using the air conditioning system and defogger
5
Interior features
GS350_200t_GS F_OM_OM30E87E_(EE)
■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.
■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.
■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 capac-
ity
●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 (→P. 3 5 6 )
■When the S-FLOW mode operates
If air flows to the driver’s seat only, the temperature setting for the front passenger’s seat
is not displayed.
■When the outside temperature is low
The dehumidification function may not operate even when “A/C” on the option control
screen is selected.
■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.

409
5
5-2. Using the air conditioning system and defogger
Interior features
GS350_200t_GS F_OM_OM30E87E_(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 ventilators maintain good airflow by blow-
ing air from the seats.
WA R N I N G
●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 that
have an uneven surface on the seat and do not stick sharp objects (needles, nails, etc.)
into the seat.
●To prevent battery discharge, do not use the functions when the engine is not running.

4135-2. Using the air conditioning system and defogger
5
Interior features
GS350_200t_GS F_OM_OM30E87E_(EE)
■The seat heaters/seat ventilators can be used when
The engine switch is in IGNITION ON mode.
■Seat heater control (vehicles without automatic mode)
The seat heater automatically changes operations. If the engine 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
If the driving mode select swit ch is switched to Eco drive mo de 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 9 5 )
■Button lock function (vehicles with rear control panel)
To prevent inadvertent operation, some buttons on the rear armrest can be locked.
(→ P. 4 0 8 )
■When the switch is disabled (v ehicles 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. 4 0 1 )
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the re ar armrest can be turned off. (→P. 4 0 8 )
■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 can
be changed. (Customizable features: →P. 6 4 0 )
Current operation
Starting operation mode and amount of time elapsed
until engine switch in IGNITION ON mode
0 to 15 minutesOver 15 minutes
HiHiHi
MidMidHi
LoLoHi

5267-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E87E_(EE)
Indicates that the parking brake system is overheatingA buzzer also sounds.
→ Do not use the parking brake until the message dis-
appears.
Indicates an engine malfunction
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates an engine malfunction
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates an engine malfunction
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Wa r n i n g m e s s a g eDetails/Actions

5967-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E87E_(EE)
If your vehicle overheats
●The needle of the engine coolant temperature gauge (→P. 108, 113) enters
the red zone or a loss of engine power is experienced. (For example, the vehi-
cle speed does not increase.)
●“Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is shown
on the multi-information display.
●Steam is coming from under the hood.
Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, imme-
diately contact any authorized Lexus
dealer or repairer, or another duly quali-
fied and equipped professional.
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

653Alphabetical index
GS350_200t_GS F_OM_OM30E87E_(EE)
Clock ............................................... 109, 427
Coat hooks .............................................. 432
Condenser .............................................460
Console box ............................................ 418
Console box light................................... 419
Coolant .....................................................458Capacity .................................................. 619
Checking .............................................. 458
Preparing and checking before winter ....................................382
Cooling system......................................458 Engine overheating ......................... 596
Cruise control Cruise control .....................................353
Dynamic radar cruise control with full-speed range.................... 329
Dynamic radar cruise control .......341
Cup holders ............................................. 419
Curtain shield airbags ............................ 51
Customizable features .......................628
DAB (Digital Audio Broadcast)
*
Daytime running light system ......... 262
Defogger Front windshield ................................ 400
Outside rear view mirrors............ 400
Rear window ....................................... 400
Differential Front differential....................................621
Rear differential .....................................621 Digital Audio Broadcast (DAB)
*
Dimensions ............................................. 606
Display
12.3-inch display ................................ 392
Drive information.......................122, 130
Dynamic radar cruise control
with full-speed range ................... 329
Dynamic radar cruise control ....... 341
LDA (Lane Departure Alert with steering control)..................... 319
LKA (Lane-Keeping Assist) ..........310
Multi-information display.........121, 129
Trip information ...........................108, 113
Warning message ..............................518
Do-it-yourself maintenance ............. 443
Door courtesy lights Location ................................................... 414
Wattage ................................................. 625
Door lock Doors......................................................... 159
Smart entry & start system ............. 173
Wireless remote control ................. 154
Doors ............................................................... 159
Automatic door locking and
unlocking system ............................. 163
Door glasses.......................................... 213
Door lock ................................................ 162
Open door warning buzzer .......... 174
Open door warning light ................ 514
Outside rear view mirrors .............. 210
Rear door child-protector ............. 163
D
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

655Alphabetical index
GS350_200t_GS F_OM_OM30E87E_(EE)
Emergency brake signal .................... 375
Emergency flashers .............................502
Emergency tire puncture repair kit ................................................ 567
Engine......................................................... 610 Accessory mode................................ 240
Compartment......................................448
Engine switch....................................... 239
Hood ........................................................445
How to start the engine .................. 239
Identification number ...................... 609
Ignition switch
(engine switch) ................................ 239
Overheating ........................................ 596
Engine compartment cover .............. 451
Engine coolant .......................................458 Capacity .................................................. 619
Checking .............................................. 458
Preparing and checking before winter ....................................382
Engine coolant temperature gauge.......................................................108
Engine oil.................................................. 453 Capacity ...................................................612
Checking ...............................................453
Oil level warning message ............ 518
Oil pressure warning message............................................... 518
Preparing and checking before winter ....................................382 Engine switch ......................................... 239
Auto power off function ................... 241
Changing the engine switch modes.................................................. 240
If your vehicle has to be stopped in an emergency ......... 503
Starting the engine............................ 239
EPS (Electric Power Steering) ....... 375
Function.................................................. 375
Warning light......................................... 513
Warning message ..............................518
Expert mode............................................377
First-aid kit storage net ...................... 423
Flat tire
Vehicles with spare tire....................551
Vehicles without spare tire........... 567
Floor mats ................................................... 42
Fluid Automatic transmission.................. 620
Brake ........................................................622
Washer ................................................... 464
Fog lights .................................................. 273
Replacing light bulbs ....................... 498
Switch .......................................................273
Follow me home system ......................261
Footwell light ............................................ 414
Front air conditioning system .......... 394
Front fog lights ....................................... 273 Replacing light bulbs ....................... 498
Switch .......................................................273
F
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

660Alphabetical index
GS350_200t_GS F_OM_OM30E87E_(EE)
Multi-information display ........... 121, 129Boost meter/oil temperature
gauge/oil pressure gauge...........123
Drive information ...................... 122, 130
Dynamic radar cruise control .......341
Dynamic radar cruise control
with full-speed range.................... 329
“F” content ............................................... 132
G-force.......................................... 124, 135
Lap timer ..................................................132
LDA ((Lane Departure Alert with steering control) .................... 315
LKA (Lane-Keeping Assist) ........ 305
Torque distribution .............................134
Warning message.............................. 518
nanoe  system .....................................404
Navigation system
*
Odometer........................................ 108, 113
Oil Engine oil .................................................612
Front differential oil .............................621
Rear differential oil...............................621
Opener
Fuel filler door..................................... 280
Hood ........................................................445
Trunk ......................................................... 166
Outer foot lights
Location....................................................414
Replacing light bulbs........................ 494
Wattage..................................................625 Outside rear view mirrors ..................210
Adjusting and folding ........................ 210
BSM (Blind Spot Monitor) ............. 361
Linked mirror function
when reversing ................................... 211
Mirror position memory ..................198
Outside rear view mirror defoggers .........................................400
Outside temperature display .............................................109, 115
Overheating, Engine .......................... 596
Paddle shift switches ............................247
Parking assist sensors
*
Parking brake......................................... 254 If the parking brake cannot be released .......................................586
Operation ............................................. 254
Parking brake engaged warning buzzer.................................518
Parking brake engaged
warning message ............................518
PCS
(Pre-Crash Safety system)............ 293Function.................................................. 293
Warning light......................................... 513
Warning message ..............................518
Personal lights..........................................415
Pop-up display.............................. 126, 138
Pollen removal mode..........................400
Power easy access system ................ 198
Power outlets ......................................... 428
N
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