heater Lexus GS350 2020 User Guide

GS350_GS F_OM_OM30J07U_(U)
3335-2. Using the air conditioning system and defogger
5
Interior features
■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 operating.
Seat ventilator switches (front seats only)
The indicator light (green) on the switch co mes on when the seat ventilator is operat-
ing.
Level indicator lights
The seat heater temperature level or the seat ventilator fan speed level (for front seats
only) is displayed.
“AUTO” indicator lights
Seat heaters (if equipped)/seat ventilators (if equipped)
Front seatsRear seats
1
2
3
4

334
GS350_GS F_OM_OM30J07U_(U)5-2. Using the air conditio
ning system and defogger
●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 tem-
perature 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

GS350_GS F_OM_OM30J07U_(U)
3355-2. Using the air conditioning system and defogger
5
Interior features
■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 vent ilators 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 be fore it is turned back on.
1
2
ModeLevel indicator lights
OffOff
Hi3
Mid2
Lo1
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

336
GS350_GS F_OM_OM30J07U_(U)5-2. Using the air conditio
ning system and defogger
■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 oper ated to assist heating performance.
■Automatic operation during S-FLOW mode
The front seat heater and ventilator or the re ar seat heater may automatically turn off
when S-FLOW mode is turned on during automatic mode. (P. 319)
■Button lock function (vehicle s with rear control panel)
To prevent inadvertent operation, some bu ttons on the rear armrest can be locked.
(  P. 331)
■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. 325)
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the re ar armrest can be turned off. (P. 331)
■Customization
The automatic mode settings for the front seat heaters and ventilators or the rear seat
heaters can be changed. (Customizable features:  P. 542)

GS350_GS F_OM_OM30J07U_(U)
3696-1. Maintenance and care
6
Maintenance and care
NOTICE
■Cleaning detergents
●Do not use the following types of detergent, as they may discolor the vehicle interior
or cause streaks or damage to painted surfaces:
• Non-seat portions: Organic substances su ch as benzene or gasoline, alkaline or
acidic solutions, dye, and bleach
• Seats: Alkaline or acidic solutions, su ch as thinner, benzene, and alcohol
●Do not use polish wax or polish cleaner. The instrument pane l’s or other interior part’s
painted surface may be damaged.
■Preventing damage to leather surfaces
Observe the following precautions to avoid damage to and deterioration of leather
surfaces:
●Remove any dust or dirt from leather surfaces immediately.
●Do not expose the vehicle to direct sunlight for extended periods of time. Park the
vehicle in the shade, especially during summer.
●Do not place items made of vinyl, plastic, or containing wax on the upholstery, as they
may stick to the leather surface if the vehicle interior heats up significantly.
■Water on the floor
Do not wash the vehicle floor with water.
Vehicle systems such as the audio system may be damaged if wate r comes into contact
with electrical components such as the au dio system above or under the floor of the
vehicle. Water may also cause the body to rust.
■When cleaning the inside of the windshield (vehicles with Lexus Safety System +)
Do not allow glass cleaner to contact the lens. Also, do not touch the lens. ( P. 241)
■Cleaning the inside of the rear window
●Do not use glass cleaner to clean the rear window, as this may cause damage to the
rear window defogger heater wires or antenna. Use a cloth dampened with luke-
warm water to gently wipe the window clean. Wipe th e window in strokes running
parallel to the heater wires or antenna.
●Be careful not to scratch or damage the heater wires or antenna.

4667-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
Warning messageDetails/Actions
(If equipped)
Indicates that the PCS (Pre-Collision System) is tempo-
rarily unavailable
 When conditions improve, the system resumes
operation. If this item is displayed continuously, have
the vehicle inspected by your Lexus dealer.
Air conditioning, heater and other operations are tem-
porarily limited due to high power consumption
 Turn off unnecessary electronic equipment to
reduce power consumption.
Please wait until the power supply returns to nor-
mal.
If this item is frequently displayed, have the vehicle
inspected at your Lexus dealer immediately.
(If equipped)
Indicates that part of th e PCS (Pre-Collision System)
sensor is dirty, covered with ice, etc. A buzzer also sounds.
 Remove any dirt, ice, etc.
(Flashes)
(Flashes)
(Flashes)

GS350_GS F_OM_OM30J07U_(U)
5378-1. Specifications
8
Vehicle specifications
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing the tire’s
resistance to the generation of heat and its ability to dissipate heat when
tested under controlled conditions on a specified indoor laboratory test
wheel.
Sustained high temperature can cause the ma terial of the tire to degenerate and
reduce tire life, and excessive temperature can lead to sudden tire failure.
Grade C corresponds to a level of perfor mance which all passenger car tires must
meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory test
wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly inflated and
not overloaded.
Excessive speed, underi nflation, or excessive loading, either separately or in com-
bination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more than 1
mile or 1.5 km un der that condition
Maximum inflation pres-
sureThe maximum cold inflated pr essure to which a tire may
be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a manu-
facturer
Accessory weight
The combined weight (in exce ss of those standard items
which may be replaced) of automatic transmission,
power steering, power brakes, power windows, power
seats, radio and heater, to the extent that these items are
available as factory-installed equipment (whether
installed or not)
Curb weight
The weight of a motor vehicle with standard equipment,
including the maximum capacity of fuel, oil and coolant,
and if so equipped, air co nditioning and additional
weight optional engine
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the numb er of occupants specified
in the second column of Table 1
* that follows

GS350_GS F_OM_OM30J07U_(U)
5538-2. Customization
8
Vehicle specifications
■Automatic air conditioning system (P. 318)
■Front seat heaters (wit hout seat ventilators)* ( P. 334)
*: If equipped
■Front seat heaters and ventilators*1/rear seat heaters*2 ( P. 333)
*1: If both are equipped
*2: If equipped
FunctionDefault
settingCustomized setting
A/C Auto switch operationOnOffO—O
Exhaust gas sensor informationStandard-3 to 3O—O
123
FunctionDefaultsettingCustomized setting
Automatic operation of front seat heaterOffOn——O
123
FunctionDefault
settingCustomized setting
Adjustment of the front seat heater tem-
perature or the ventilator fan speed
during automatic operation (individual
seat adjustment available) Level 3
(standard)Level 1 (low) to level 5 (high)O—O
Adjustment of the re ar seat heater tem-
perature during automatic operation
(individual seat ad justment available)Level 3
(standard)Level 1
(low) to
level 5 (high)
O—O
Rear seat heater start-up conditions
when the engine switch is in IGNITION
ON mode (individual seat adjustment
available)
OffOn
(AUTO)O—O
123

580Alphabetical index
GS350_GS F_OM_OM30J07U_(U)
Child restraint system............................ 59Booster seats, definition ....................59
Booster seats, installation.................. 67
Convertible seats, definition ............59
Convertible seats, installation .........65
Front passenger occupant classification system ......................... 52
Infant seats, definition ..........................59
Infant seats, installation .......................65
Installing CRS with LATCH anchors ..................... 64
Installing CRS with seat belts ..........65
Installing CRS with top tether strap .........................68
Child safety ................................................ 58 Airbag precautions .............................. 44
Battery precautions .............392, 508
Child restraint system .........................59
How your child should wear the seat belt ................................. 37, 38
Installing child restraints..................... 63
Moon roof precautions.................... 186
Power window lock switch .............. 181
Power window precautions .......... 183
Rear door child-protectors ........... 146
Removed electronic key battery precautions.................412
Seat belt comfort guide ..................... 37
Seat belt extender precautions ......40
Seat belt precautions .......................... 62
Seat heater precautions.................. 332
Trunk precautions............................... 152 Child-protectors .................................... 146
Cleaning ....................................... 362, 367
Aluminum wheels .............................. 363
Exterior ................................................... 362
Interior ..................................................... 367
Seat belts................................................368
Clock................................................. 93, 347
Coat hooks ............................................. 352
Condenser.............................................. 389
Console box ............................................. 341
Console box light ................................... 341
Consumption screen ............................ 134
Cooling system ..................................... 388 Engine overheating ......................... 509
Consumption screen ............................ 133
Cruise control Cruise control ..................................... 278
Dynamic radar cruise control with full-speed range ................... 266
Cup holders.............................................342
Curtain shield airbags ............................ 42
Customizable features .......................542
Daytime running light system...........223
Defogger Front windshield................................. 324
Outside rear view mirrors ............ 324
Rear window........................................ 324
Differential Front differential ................................. 523
Rear differential................................... 524
D

583Alphabetical index
GS350_GS F_OM_OM30J07U_(U)
Engine oil maintenance data ............. 371
Engine switch ......................................... 203Auto power off function................. 205
Changing the engine switch modes ..................................................204
If your vehicle has to be stopped in an emergency ..........425
Starting the engine ........................... 203
EPS (Electric Power Steering) ....... 298 Function ................................................. 298
Warning light .......................................436
Warning message ............................. 442
Event data recorder (EDR) ...................10
Expert mode ............................................ 301
First-aid kit storage net ...................... 344
Flat tire Vehicles with spare tire .................. 473
Vehicles without spare tire .......... 484
Floor mats ................................................... 32
Fluid Automatic transmission ..................523
Brake ........................................................524
Washer ...................................................393
Footwell light .......................................... 337
Front passenger occupant classification system ............................ 52
Front personal lights............................ 338 Front seats ................................................. 164
Adjustment..............................................164
Cleaning................................................. 367
Correct driving posture .................... 34
Driving position memory.................166
Head restraints ....................................... 171
Power easy access system .............166
Seat heaters .......................................... 333
Seat position memory .......................166
Seat ventilators.................................... 333
Front side marker lights......................222 Light switch............................................222
Replacing light bulbs ......................... 421
Welcome light illumination control.................................................... 144
Front turn signal lights .......................... 216 Replacing light bulbs ............. 420, 421
Turn signal lever ................................... 216
Wattage .................................................528
Fuel Capacity...................................................519
Fuel gauge .................................... 93, 100
Fuel pump shut off system ............ 434
Information............................................ 529
Type............................................................519
Warning light ....................................... 437
Warning messages .......................... 442
Fuel consumption Average fuel consumption............................. 108, 115
Average fuel consumption after refueling ........................... 108, 115
Current fuel consumption..... 108, 115
F