cooling TOYOTA GR YARIS 2023 Owners Manual

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5-1. Using the air conditioning system and defogger
Interior features
Off switch
Automatic mode switch
■Adjusting the temperature set-
ting
To adjust the temperature setting,
turn the temperature control dial
clockwise (warm) or counterclock-
wise (cool).
If “A/C” switch is not pressed, the sys-
tem will blow ambient temperature air
or heated air.
■Setting the fan speed
Operate the fan speed increases
switch to increase the fan speed
and the fan speed decreases
switch to decrease the fan speed.
Pressing the off switch to turns off
the fan.
■Change the airflow mode
Press the airflow mode control
switch.
The airflow mode changes as follows
each time the switch is pressed.
1 Upper body
2 Upper body and feet
3 Feet
4 Feet and the windshield defog-
ger operates
■Switching between outside air
and recirculated air modes
 To change to recirculated air
mode, press the recirculated air
mode switch.
The indicator illuminates on the recircu-
lated air mode switch.
 To change to outside air mode,
press the outside air mode
switch.
The indicator illuminates on the outside
air mode switch.
■Set cooling and dehumidifica-
tion function
Press the “A/C” switch.
When the function is on, the indicator
illuminates on the “A/C” switch.
■Defogging the windshield
Defoggers are used to defog the
windshield and front side windows.
Press the windshield defogger
switch.
Set the outside/recirculated air mode
switch to outside air mode if the recircu-
lated air mode is used. (It may switch
automatically.)
To defog the windshield and the side
windows quickly, turn the air flow and
temperature up.

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6-4. Do-it-yourself maintenance
1Pull the hood lock release lever.
The hood will pop up slightly.
2Push the auxiliary catch lever to
the left and lift the hood.
WARNING
●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 work-ing on the battery. It contains poi-sonous and corrosive sulfuric acid.
●Take care because brake fluid can harm your hands or eyes and dam-
age painted surfaces. If fluid gets on your hands or in your eyes, flush the affected area with clean water
immediately. If you still experience discomfort, consult a doctor.
■When working near the electric cooling fan or radiator grille
Be sure the engine switch is OFF. With the engine switch in ON, the electric cooling fan may automatically
start to run if the air conditioning is on and/or the coolant temperature is high. ( P.272)
■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 fil-ter
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 refill-
ing, it may indicate a serious problem.
Hood
Opening the hood

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6-4. Do-it-yourself maintenance
Maintenance and care
Washer fluid tank (P.272)
Engine coolant reservoir ( P. 2 7 1 )
Engine oil filler cap ( P.270)
Engine oil level dipstick ( P.270)
Fuse boxes ( P.295)
Radiator ( P.272)
Condenser ( P.272)
Electric cooling fan
Intercooler
■Battery
 P. 2 7 3
With the engine at operating tem-
Engine compartment
Components
Checking and adding the
engine oil

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6-4. Do-it-yourself maintenance
ant” 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.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-ized water. (Minimum temperature: -
35°C [-31°F])
For more details about coolant, contact any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
■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 any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer, test the cap and check for leaks in the cooling system.
Check the radiator, condenser and
intercooler clear away any foreign
objects. If either of the above parts
is extremely dirty or you are not
sure of their condition, have your
vehicle inspected by any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
If the washer fluid level is at “1/2”,
add washer fluid.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap.
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 mix-ture of water and antifreeze must be
used to provide proper lubrication, corrosion protection and cooling. 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.
Checking the radiator, con-
denser and intercooler
WARNING
■When the engine is hot
Do not touch the radiator, condenser
or intercooler as they may be hot and cause serious injuries, such as burns.
Adding the washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains alcohol and may catch
fire if spilled on the engine, etc.

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7-2. Steps to take in an emergency
When trouble arises
WARNING
■After recharging the battery
Have the battery inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer as soon as possible.
If the battery is deteriorating, contin- ued use may cause the battery to emit a malodorous gas, which may be
detrimental to the health of passen- gers.
■When replacing the battery
●For information regarding battery replacement, contact any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●After replacing, securely attach the exhaust hose and exhaust hole
plug to the exhaust hole of the replaced battery. If not properly installed, gases (hydrogen) may
leak into the vehicle interior, and there is the possible danger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entangled in the cooling fan or engine drive belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal
is to be used when charging the bat- tery from another vehicle in an emer-gency. It cannot be used to jump start
another vehicle.

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7-2. Steps to take in an emergency
1Stop the vehicle in a safe place
and turn off the air conditioning
system, and then stop the
engine.
2 If you see steam: Carefully lift
the hood after the steam sub-
sides.
If you do not see steam: Care-
fully lift the hood.
3 After the engine has cooled
down sufficiently, inspect the
hoses and radiator core (radia-
tor) for any leaks.
Cooling fan
Radiator
If a large amount of coolant leaks,
immediately contact any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
4 The coolant level is satisfactory
if it is between the “MAX” or
“MIN” lines on the reservoir.
Reservoir
“MAX” line
“MIN” line
5 Add engine coolant if necessary.
Water can be used in an emergency if
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant tempera-
ture gauge ( P.81) is in the
red zone or a loss of engine
power is experienced. (For
example, the vehicle 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 comes out from under
the hood.
Correction procedures

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7-2. Steps to take in an emergency
When trouble arises
engine coolant is unavailable.
6Start the engine and turn the air
conditioning system on to check
that the radiator cooling fan
operate and to check for coolant
leaks from the radiator or hoses.
The fan operate when the air condition-
ing system is turned on immediately after a cold start. Confirm that the fan is 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 fan may not
operate in freezing temperatures.)
7 If the fan is not operating: Stop
the engine immediately and
contact any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
If the fan is operating: Have the
vehicle inspected at the nearest
any authorized Toyota retailer or
Toyota authorized repairer, or
any reliable repairer.
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the steam has subsided. The
engine compartment may be very hot.
●Keep hands and clothing (espe-cially a tie, a scarf or a muffler) away from the fan and belts. Failure
to do so may cause the hands or clothing to be caught, resulting in serious injury.
●Do not loosen the coolant reservoir caps while the engine and radiator
are hot. High temperature steam or coolant could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding
cool coolant to a hot engine too quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant
with foreign matter (such as sand or dust etc.).
●Do not use any coolant additive.

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8-1. Specifications
Vehicle specifications
Temperature range anticipated
before next oil change
Oil viscosity (0W-20 is explained
here as an example):
• The 0W in 0W-20 indicates the
characteristic of the oil which
allows cold startability. Oils with a
lower value before the W allow
for easier starting of the engine
in cold weather.
• The 20 in 0W-20 indicates the
viscosity characteristic of the oil
when the oil is at high tempera-
ture.
How to read oil container labels:
Either or both API registered marks
are added to some oil containers to
help you select the oil you should
use.
API Service Symbol
Top portion: “API SERVICE SP” means
the oil quality designation by American
Petroleum Institute (API).
Center portion: “SAE 0W-20” means
the SAE viscosity grade.
Lower portion: “Resource-Conserving”
means that the oil has fuel-saving and
environmental protection capabilities.
ILSAC Certification Mark
The International Lubricant Specifica-
tion Advisory Committee (ILSAC) Certi-
f ic at i o n M ar k i s d is pl a ye d on t h e f r o nt o f
the container.
Cooling system
Capacity (Reference)5.2 L (5.5 qt., 4.6 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology
Do not use plain water alone.

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Alphabetical Index
C
Card holders ................................. 239
Care ....................................... 246, 249
Aluminum wheels ....................... 246
Exterior....................................... 246
Interior ........................................ 249
Matte paint ................. 252, 256, 259
Seat belts ................................... 249
Chains ........................................... 225
Child restraint system .................... 45
Points to remember...................... 45
Riding with children ...................... 44
Child safety ..................................... 44
Airbag precautions ....................... 38
Battery precautions ............ 274, 342
Child restraint system .................. 45
Heated steering wheel and seat
heater precautions ................... 233
How your child should wear the seat
belt ............................................. 32
Installing child restraints............... 45
Power window lock switch ......... 124
Power window precautions ........ 123
Removed electronic key battery pre-
cautions ................................... 294
Seat belt precautions ................... 44
Cleaning ................................ 246, 249
Aluminum wheels ....................... 246
Exterior....................................... 246
Interior ........................................ 249
Radar sensor ............................. 153
Seat belts ................................... 249
Clock ..........................................81, 83
Condenser ..................................... 272
Consumption screen ...................... 94
Cooling system .............................271
Engine overheating .................... 344
Cruise control
Dynamic radar cruise control ..... 179
Cup holders ...................................238
Current fuel consumption ..............86
Curtain shield airbags ....................34
Customizable features ................. 359
D
Daytime running light system ..... 142
Deck board .................................... 239
Defogger
Outside rear view mirrors ........... 230
Rear window .............................. 230
Windshield.................................. 229
Differential ..................................... 354
Dimensions ...................................348
Display
Dynamic radar cruise control ..... 179
Head-up display ........................... 90
LTA (Lane-Tracing Assist) .......... 175
Multi-information display ..............84
Toyota parking assist-sensor...... 204
Warning message ...................... 321
Display change button ................... 82
Do-it-yourself maintenance ......... 263
Door
Double locking system ................. 71
Door lock
Back door ...................................104
Side doors .................................. 101
Smart entry & start system ......... 107
Wireless remote control ............... 99