2017 Lexus GS200t air conditioning

4506-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30F83E_(EE)
WARNING
The engine compartment contains many mech anisms 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 b attery. Fuel or
the battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
●Take care because brake fluid can harm your hands or eyes and damage painted sur-
faces. If fluid gets on your hands or in your eyes, flush t he affected area with clean
water immediately. If you still experience discomfort, consult a doctor.
■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. 466)
■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.
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or when
the fluid level in the accumulator is high.
If the reservoir needs frequent refillin g, it may indicate a serious problem.

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6-3. Do-it-yourself maintenance
Maintenance and care
GS350_200t_GS F_OM_OM30F83E_(EE)
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 changed regularly to maintain air condi-
tioning efficiency.
Removal method
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3
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4906-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30F83E_(EE)
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 conditioning filt er according to the maintenance schedule. In
dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance information, please refer to the “Lexus Service Booklet” or
“Lexus Warranty Booklet”.)
■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.
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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.

5167-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
If you think something is wrong
●Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points higher than nor-
mal.
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touches the floor
If you notice any of the following sy mptoms, your vehicle probably needs
adjustment or repair. Contact any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

5507-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is tem-
porarily unavailable
A buzzer also sounds.
 When conditions improve, the system resumes
operation. If this item is displayed continuously, have
the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
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 normal.
If this item is frequently displayed, have the vehicle
inspected at your any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer
immediately.
(If equipped)
Indicates that part of the PC S (Pre-Crash Safety system)
sensor is dirty, covered with ice, etc.
A buzzer also sounds.
 Remove any dirt, ice, etc.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

6027-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(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
retailer or Lexus authorized repairer, or
any reliable repairer.
The following may indicate that your vehicle is overheating.
Correction procedures
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2
3
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2

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7-2. Steps to take in an emergency
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When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
Start the engine and turn the air conditio ning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
■When adding engine coolant (GS350/GS200t)
Add coolant in accordance with the following procedure.
Remove caps A and B.
Add engine coolant through the inlet of cap A up to the “[AR/GR] B” line, and then
install cap A.
Add engine coolant through the inlet of cap B until it is full, and then install cap B.
GS200t only: When installing cap B, apply c oolant to the O-ring on the end of cap B.
Cap A
Cap B
“[AR/GR] B” line (Target fill line)
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GS350 GS200t
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8-2. Customization
Vehicle specifications
GS350_200t_GS F_OM_OM30F83E_(EE)
■Lexus parking assist-sensor*1, 2
* 1
:If equipped
* 2
: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MAN-
UAL”.
* 3
: GS350/GS200t
■Driving mode select switch (vehicles with Adaptive Variable Suspension
system) ( P. 359)
FunctionDefault
settingCustomized setting
Detection distance of the front
center sensor *3FarNearO—O
Detection distance of the rear
center sensorFarNearO—O
Buzzer volume31 to 5O—O
Display setting
(when Lexus parking assist-
sensor is operating)All sensors
displayedDisplay offO—O
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FunctionDefaultsettingCustomized setting
Power train controlNormalPowerO——Eco
Chassis controlNormalSportO——
Air conditioning operationNormalEcoO——
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