cooling Lexus GS F 2016 Owner's Manual

GS350_200t_GS F_OM_OM30E86U_(U)
2974-5. Using the driving support systems
4
Driving
■Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the air condi-
tioning system to enhance fuel efficiency. To improve air conditioning performance, per-
form the following operations:
●Turn off eco air conditioning mode ( →P. 3 3 0 )
●Adjust the fan speed ( →P. 3 2 9 )
●Turn off Eco drive mode
■Automatic operation of the seat heater during Eco drive mode
Eco drive mode controls the heating operation and fan speed of the air conditioning sys-
tem to enhance fuel efficiency. If the driving mode select switch is switched to Eco drive
mode in cold temperatures, the seat heater will be automatically operated to assist heat-
ing performance.
■Automatic deactivation of sp ort mode and customized mode
If the engine switch is turned off after dr iving in sport mode or customized mode, the
drive mode will be changed to normal mode.
■Driving mode pop-up display (12.3-inch display only)
When the driving mode is changed, the sele cted driving mode will be temporarily dis-
played on the side display. ( →P. 3 2 6 )

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GS350_200t_GS F_OM_OM30E86U_(U)5-2. Using the air conditioning system and defogger
Adjust the left-hand side temperature setting
Select the air flow to the feet and operate the windshield defogger
Adjust the fan speed setting
Select the air flow mode
* (the front seats)
Function on/off indicators on the option control screen
Display the option control screen ( →P. 3 3 1 )
Adjust the right-hand side temperature setting
Set eco air conditioning mode ( →P. 337)
Air conditioning and heater output is limited to prioritize fuel economy.
Adjust the temperature for the driver’s and front passenger’s seats sepa-
rately (DUAL mode) ( →P. 3 2 9 )
Set cooling and dehumidification function on/off
Select to set automatic mode on/off
Select the air flow mode
* (the left-hand side)
Select the air flow mode
* (the right-hand side)
Display the rear air condit ioning operation screen (→P. 3 3 2 )
Adjust the temperature for the driver’s, front passenger’s and rear seats
( → P. 339) separately (3-ZONE mode) ( →P. 3 2 9 )
To adjust or select settings, move the Remote Touch knob to select the
screen button, and then press the Remote Touch knob or the “ENTER” but-
ton of Remote Touch to enter the selected function.
Control screen
XWithout rear air conditioning systemXWith rear air conditioning system
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GS350_200t_GS F_OM_OM30E86U_(U)5-2. Using the air conditioning system and defogger
■Side display (vehicles
with 12.3-inch display)
Adjust the left-hand side temperature setting
Select the air flow mode (the front seats)
Adjust the fan speed setting
Adjust the right-hand side temperature setting
Adjust the temperature for the driver’s and front passenger’s seats separately
(DUAL mode) ( →P. 3 2 9 )
Set cooling and dehumidification function on/off
Select to set automatic mode on/off
Select the air flow mode (the left-hand side)
Select the air flow mode (the right-hand side)
Adjust the temperature for the driver’s, front passenger’s and rear seats
( → P. 339) separately (3-ZONE mode) ( →P. 3 2 9 )
■Rear air conditioning control screen (with rear air conditioning system)
Adjust the rear seat temperature
setting
Disabling the switches on the rear
armrest
Turn the fan off (rear seat)
Select to set automatic mode on/
off (rear seat)
XWithout rear air conditioning systemXWith rear air conditioning system
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GS350_200t_GS F_OM_OM30E86U_(U)5-2. Using the air conditioning system and defogger
■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.
■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 registered 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 than 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 according 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 humidity 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 entering the vehicle interi or. 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.
XFront center outlets and front side
outletsXRear seat outlets
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GS350_200t_GS F_OM_OM30E86U_(U)
3375-2. 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 conditioning power consumption, the air conditioning system
may switch to recirculated air mode automatically. 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 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:
●Turn off eco air conditioning mode
●Adjust the fan speed
●Turn off Eco drive mode ( →P. 2 9 3 )
■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 mode 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 temperature setting for the front passenger’s seat
is not displayed.
■When the outside temperature is low
The dehumidification function may not operat e 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.

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GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
WA R N I N G
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. 4 0 8 )
■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 filter removed may cause excessive engine wear due to dirt
in the air.

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GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
Engine compartment
XGS350
Fuse boxes (
→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine coolant reservoir (→ P. 4 0 6 )
Engine oil filler cap ( →P. 4 0 3 ) Brake fluid reservoir
(→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Electric cooling fans
Condenser ( →P. 4 0 8 )
Radiator ( →P. 4 0 8 )1
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GS350_200t_GS F_OM_OM30E86U_(U)
3976-3. Do-it-yourself maintenance
6
Maintenance and care
XGS200t
Fuse boxes (→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Intercooler coolant reservoir (→ P. 4 0 6 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine oil filler cap ( →P. 4 0 3 ) Engine coolant reservoir
(→ P. 4 0 6 )
Brake fluid reservoir (→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Condenser ( →P. 4 0 8 )
Electric cooling fans
Radiator ( →P. 4 0 8 )1
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398
GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
XGS F
Fuse boxes (
→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine coolant reservoir (→ P. 4 0 6 )
Engine oil filler cap ( →P. 4 0 3 ) Brake fluid reservoir
(→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Electric cooling fans
Condenser ( →P. 4 0 8 )
Radiator ( →P. 4 0 8 )1
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GS350_200t_GS F_OM_OM30E86U_(U)
4076-3. Do-it-yourself maintenance
6
Maintenance and care
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid
organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water.
(Minimum temperature: -31 °F [-35 °C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deionized water.
(Minimum temperature: -44° F [-42°C])
For more details about coolant, contact your Lexus dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock and water
pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.
WA R N I N G
■When the engine is hot
Do not remove the engine coolant reservoir cap, the intercooler coolant reservoir cap
or the coolant inlet cap. ( →P. 5 3 2 )
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cool-
ing. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.