engine Lexus GS350 2019 Owner's Manual

GS350_300_OM_OM30G96U_(U)
3014-5. Using the driving support systems
4
Driving
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC, Hill-start assist
control and VGRS systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard afte r the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down s lightly after the ABS is activated.
■EPS, VGRS and DRS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automatically re-
enabled in the following situations:
●When the engine swit ch is turned off
●If only the TRAC system is turned off, the TRAC will turn on when vehicle speed
increases
If both TRAC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering
wheel may feel heavy as a result . Should this occur, refrain from excessive steering input
or stop the vehicle and turn the engine off. The EPS system should return to normal
within 10 minutes.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate;
●The shift lever is in a position other than N or P (when starting off forward/backward on
an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
■Automatic system cancelation of hill-start assist control
The hill-start assist control will be cancel ed in any of the following situations;
●The shift lever is shifted to N or P.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.

304
GS350_300_OM_OM30G96U_(U)4-6. Driving tips
Winter driving tips
●Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
• Engine coolant
• Washer fluid
●Have a service technician inspect the condition of the battery.
●Have the vehicle fitted with four snow tires or purchase a set of tire chains for
the rear tires.
*
Ensure that all tires are the specified size and brand, and that chains match the size of
the tires.
*: Tire chains cannot be mounted on vehicles with front and rear tires of differing sizes
and vehicles with LDH and 19-inch tires.
●Use fluids that are appropriate to the prevailing outside temperatures.
•Engine oil
• Engine coolant
• Washer fluid
●Have a service technician inspect the condition of the battery.
●Have the vehicle fitted with four snow tires.
Ensure that all tires are th e specified size and brand.
Carry out the necessary preparations an d inspections before driving the vehi-
cle in winter. Always drive the vehicle in a manner appropriate to the prevail-
ing weather conditions.
Preparation for winter (GS350/GS300)
Preparation for winter (GS F)

308
GS350_300_OM_OM30G96U_(U)4-6. Driving tips
WARNING
■Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of vehi cle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive in excess of 75 mph (120 km/h ), regardless of the type of snow tires
being used.
●Use snow tires on all, not just some wheels.
■Driving with tire chains (GS350/GS300 with front and rear tires of the same size
except for the vehicles with LDH and 19 inch tires)
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the ti re chains being used, or 30
mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
●Slow down sufficiently before entering a cu rve to ensure that vehicle control is main-
tained.
●Do not use LKA (Lane-Keeping Assist) system. (if equipped)
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow ti res from Lexus dealers or legitimate tire
retailers.
This is because the removal an d attachment of snow tires affects the operation of the
tire pressure warning va lves and transmitters.
■Fitting tire chains (GS350/GS300 with fron t and rear tires of the same size except
for the vehicles with LDH and 19 inch tires)
The tire pressure warning valv es and transmitters may not function correctly when tire
chains are fitted.
■When standing the windshield wipers up
Raise the wipers in line with the windshield. ( P. 307)
Failure to do so may result in dama ge to the wipers and/or the hood.

3125-1. Remote Touch screen
GS350_300_OM_OM30G96U_(U)
■Screen display during low temperatures
When the ambient temperature is extremely low, screen response may be delayed even
if the Remote Touch is operated.
WARNING
■When using the Remote Touch
●Do not allow fingers, fingernails or hair to become caught in the Remote Touch as this
may cause an injury.
●Be careful when selecting the Remote Touch in extreme temperatures as it may
become very hot or cold due to the temperature inside the vehicle.
NOTICE
■To prevent damage to the Remote Touch
●Do not allow the Remote Touch to come into contact with food, liquid, stickers or lit
cigarettes as doing so may cause it to change color, emit a strange odor or stop func-
tioning.
●Do not subject the Remote Touch to excessive pressure or strong impact as the knob
may bend or break off.
●Do not allow coins, contact lenses or ot her such items to become caught in the
Remote Touch as this may cause it to stop functioning.
●Items of clothing may rip if they become caught on the Remote Touch knob.
●If your hand or any object is on the Remote Touch knob when the engine switch is
turned to ACCESSORY mode, the Remote Touch knob may not operate properly.

324
GS350_300_OM_OM30G96U_(U)5-2. Using the air conditio
ning system and defogger
■Adjusting the air flow direction and opening/closing the air outlets
Direct air flow to the left or right, up or down.
Turn the knob to open or close the vent.
■Registering air conditioning settings to electronic keys
●Unlocking the vehicle using an electronic ke y and turning the engine switch to IGNI-
TION ON mode will recall that key’s re gistered air conditioning settings.
●When the engine switch is turned off, the current air conditioning settings will automat-
ically be registered to the electronic key that was used to unlock the vehicle.
●The system may not operate correctly if more th an 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 corresponding door can be changed. Contact
your Lexus dealer.
■Using automatic mode
Fan speed is adjusted automatically accordin g to the temperature setting and the ambi-
ent conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow immediately
after is pressed.
Cool air may blow around the upper body even when the heater is on due to sunlight.
■Fogging up of the windows
●The windows will easily fog up when the humidi ty 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.
■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 enteri ng the vehicle interior. During cooling operation, setting the
recirculated air mode will also cool the vehicle interior effectively.
●Outside/recirculated air mode may automa tically switch depending on the tempera-
ture setting or the inside temperature.
Front center outlets and front side
outletsRear seat outlets
1
2

GS350_300_OM_OM30G96U_(U)
3255-2. Using the air conditioning system and defogger
5
Interior features
■When the outside temperature exceeds 75°F (24°C) and the air conditioning system
is on
●In order to reduce the air co nditioning power consumption, the air conditioning system
may switch to recirculated air mode automa tically. This may also reduce fuel consump-
tion.
●Recirculated air mode is selected as a default mode when the engine switch is turned
on.
●It is possible to switch to outside air mode at any time by pressing .
■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 sy stem 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 performanc e, perform the following operations:
●Turn off eco air conditioning mode
●Adjust the fan speed
●Turn off Eco drive mode ( P. 281)
■Eco air conditioning mode
When Eco drive mode is selected using the drive mode select switch, eco air condition-
ing mode turns on.
When a drive mode other than Eco drive mo de is selected, eco air conditioning mode
may turn off.
■When the S-FLOW mode operates
If air flows to the driver’s seat only, the te mperature 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 dela yed for a short period of time immediately
after the air conditioning system is started in automatic mode.

326
GS350_300_OM_OM30G96U_(U)5-2. Using the air conditio
ning system and defogger
■Air conditioning filter
P. 410
■Customization
Settings (e.g. exhaust gas sensor sensitivity) can be changed.
(Customizable features: P. 549)
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 pill ars when the windshield wiper de-icer is on.
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the engine is
stopped.
●Do not place anything on the instrument
panel which may cover th e air outlets. Other-
wise, air flow may be obstructed, preventing
the windshield defoggers from defogging.

GS350_300_OM_OM30G96U_(U)
3295-2. Using the air conditioning system and defogger
5
Interior features
■Button lock function
■Rear control panel illumination off function 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. Pr ess 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 battery discharge
Do not leave the air conditioni ng system on longer than necessary when the engine is
off.

330
GS350_300_OM_OM30G96U_(U)5-2. Using the air conditio
ning 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 automati cally 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, 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 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 us e the functions when the engine is off.
Heated steering wheel (If equipped)

GS350_300_OM_OM30G96U_(U)
3335-2. 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