2020 Lexus GS350 air conditioning

332
GS350_GS F_OM_OM30J07U_(U)5-2. Using the air conditioning system and defogger
Heated steering wheel/seat heaters/seat ventilators
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 engine switch is in IGNITION ON
mode.
●The heated steering wheel will automatically turn off after about 30 minutes.
: 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.
WARNING
●Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel or seats when the heater is on:
• Babies, small children, the elderly, th
e 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 pr event the 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 off.
Heated steering wheel (If equipped)

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
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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

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GS350_GS F_OM_OM30J07U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior ................ 362
Cleaning and protecting the vehicle interior.................. 367
6-2. Maintenance Maintenance requirements ... 370
General maintenance.............. 372
Emission inspection and maintenance (I/M)
programs .................................... 375
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................ 376
Hood ............................................... 378
Positioning a floor jack ............ 379
Engine compartment ................ 381
Tires ................................................. 394
Tire inflation pressure............... 404
Wheels ........................................... 407
Air conditioning filter ...............409
Electronic key battery ................. 411
Checking and replacing fuses ............................................... 413
Headlight aim (vehicles with single-beam headlights).........417
Light bulbs...................................... 419

GS350_GS F_OM_OM30J07U_(U)
3776-3. Do-it-yourself maintenance
6
Maintenance and care
WARNING
The engine compartment contains many mechan isms and fluids that may move suddenly,
become hot, or become electrically energize d. To avoid death or serious injury, observe
the following precautions.
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel and
battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
(  P. 389)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner f ilter removed may cause excessive engine wear due to dirt
in the air.

409
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Air conditioning filter
Turn the engine switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
Press the tabs and remove the filter
cover.
Press the tabs and remove the filter
case.
The air conditioning filter must be ch
anged regularly to maintain air condi-
tioning efficiency.
Removal method
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4

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GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “
UP” marks shown on the filter
and the filter case should be pointing up.
■Changing interval
Inspect and replace the air cond itioning filter according to the maintenance schedule. In
dusty areas or areas with heavy traffic fl ow, early replacement may be required. (For
scheduled maintenance informat ion, please refer to the “Owner’s Manual Supplement”
or “Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
■Air conditioning filter with deodorizing function
When fragrances are placed in your vehicle, the deodorizing effect may become signifi-
cantly weakened in a short period.
When an air conditioning odor comes out cont inuously, replace the air conditioning filter.
5
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.