2021 TOYOTA YARIS HATCHBACK cooling

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YARIS(HB) Owner's Manual_Europe_MK0001_en
4-5. Using the driving support systems
Driving
teristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When the Eco drive mode is selected,
Eco drive mode indicator comes on.
■Operation of the air conditioning
system in Eco drive mode
Eco drive mode controls the heat-
ing/cooling operations and fan speed of
the air conditioning system to enhance
fuel efficiency. To improve air condition-
ing performance, perform the following
operations:
●Turn off air conditioning eco mode
(vehicles with an automatic air condi-
tioning system) (→P.285)
●Adjust the fan speed (→P.279, 284)
●Turn off Eco drive mode
■Automatic deactivation of power
mode
If the engine switch is turned off after
driving in power mode, the drive mode
will be changed to normal mode.
*: If equipped
■If “Exhaust Filter Full See Owner’s
Manual” is shown on the multi-
information display
●The message may be displayed while
high load driving with particulate mat-
ter accumulating.
●Engine output is restricted while the
message is displayed, however, it is
possible to drive the vehicle unless
the malfunction indicator lamp comes
on.
●Particulate matter can accumulate
more quickly if the vehicle is fre-
quently driven short trips or at low
speeds, or if the engine is regularly
started in an extremely cold environ-
ment. Excessive accumulation of par-
ticulate matter can be prevented by
periodically driving long distances
continuously with intermittent releas-
ing of the accelerator pedal, such as
when driving on highways and free-
ways.
■If the malfunction indicator lamp
comes on or “Engine Maintenance
Required Visit Your Dealer” is
shown on the multi-information
display
The amount of accumulated particulate
matter has exceeded a certain level.
Have the vehicle inspected by any
authorized Toyota retailer or Toyota
GPF (Gasoline Particu-
late Filter) system
*
The GPF system collects par-
ticulate matter in the exhaust
gas by using an exhaust gas
filter.
The system will operate to
regenerate the filter automati-
cally, depending on the vehicle
conditions.

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YARIS(HB) Owner's Manual_Europe_MK0001_en
5-1. Using the air conditioning system and defogger
3Feet
4 Feet and the windshield defog-
ger operates
5 The windshield defogger oper-
ates
■Switching between outside air
and recirculated air modes
Type A
z To change to recirculated air
mode, turn the outside/recircu-
lated air mode dial to .
z To change to outside air mode,
turn the outside/recirculated air
mode dial to .
Type B
Press the outside/recirculated air
mode switch.
The mode switches between outside air
mode and recirculated air mode modes
each time the switch is operated.
When recirculated air mode is selected,
the indicator illuminates on the out-
side/recirculated 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.
Set the outside/recirculated air mode
dial to .
Perform the following operations
accordingly:
z To adjust the fan speed, turn the
fan speed control dial.
z To adjust the temperature set-
ting, turn the temperature control
dial.
z If the dehumidification function is
not operating, press “A/C” switch
to operate the dehumidification
function.
To defog the windshield and the side
windows early, turn the air flow and
temperature up.
■Defogging the rear window
and outside rear view mirrors
(if equipped)
Vehicles without outside rear
view mirror defoggers
A defogger is used to defog the
rear window.
Press the rear window defogger
switch.
The defogger will automatically turn off
after a while.
When the rear window defogger switch
is on, the indicator illuminates on the
rear window defogger switch.
Vehicles with outside rear view
mirror defoggers
Defoggers are used to defog the
rear window, and to remove rain-
drops, dew and frost from the out-
side rear view mirrors.

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YARIS(HB) Owner's Manual_Europe_MK0001_en
5-1. Using the air conditioning system and defogger
Interior features
Press the rear window and outside
rear view mirror defoggers switch.
The defoggers will automatically turn off
after a while.
When the rear window and outside rear
view mirror defoggers switch is on, the
indicator illuminates on the rear window
and outside rear view mirror defoggers
switch.
■Fogging up of the windows
●The windows will easily fog up when the humidity in the vehicle is high.
Turning “A/C” switch is on will dehu- midify the air from the outlets and defog the windshield effectively.
●If you turn “A/C” switch is off, the win-dows may fog up more easily.
●The windows may fog up if the recir-culated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up by the vehicle is still drawn into the vehicle after closing the windows, it is recom-
mended that the air intake mode be set to outside air mode and the fan speed to any setting except off.
■Outside/recirculated air mode
●Setting to the recirculated air mode
temporarily is recommended in pre- venting dirty air from entering the vehicle interior and helping to cool the
vehicle when the outside air tempera- ture is high.
●During cooling operation, setting the recirculated air mode will also cool the vehicle interior effectively.
■When the outside temperature falls
to nearly 0°C (32°F)
The dehumidification function may not operate even when “A/C” switch is
pressed.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condition-
ing system to the outside air mode.
●During use, various odors from inside
and outside the vehicle may enter into and accumulate in the air conditioning system. This may then cause odor to
be emitted from the vents.
●It is recommended that the air condi-
tioning system be set to outside air mode prior to turning the vehicle off.
■Air conditioning filter
→ P. 3 4 3
■Location of air outlets
The air outlets and air volume
WARNING
■To prevent the windshield from fogging up
Do not use the windshield defogger
switch 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.
■When the outside rear view mir-
ror defoggers are operating (if equipped)
Do not touch the outside rear view
mirror surfaces, as they can become very hot and burn you.
NOTICE
■To prevent battery discharge
Do not leave the air conditioning sys-
tem on longer than necessary when the engine is off.
Air outlet layout and opera-
tions

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YARIS(HB) Owner's Manual_Europe_MK0001_en
5-1. Using the air conditioning system and defogger
Interior features
1Upper body
2 Upper body and feet
3 Feet
4 Feet and the windshield defog-
ger operates
■Switching between outside air
and recirculated air modes
z To change to recirculated air
mode, press the recirculated air
mode switch.
The indicator illuminates on the recircu-
lated air mode switch.
z 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.
To return to the previous mode, press
the windshield defogger switch again
when the windshield is defogged.
When the windshield defogger switch is
on, the indicator illuminates on the
windshield defogger switch.
■Defogging the rear window
and outside rear view mirrors
(if equipped)
Vehicles without outside rear
view mirror defoggers
A defogger is used to defog the
rear window.
Press the rear window defogger
switch.
The defogger will automatically turn off
after a while.
When the rear window defogger switch
is on, the indicator illuminates on the
rear window defogger switch.
Vehicles with outside rear view
mirror defoggers
Defoggers are used to defog the
rear window, and to remove rain-
drops, dew and frost from the out-
side rear view mirrors.
Press the rear window and outside
rear view mirror defoggers switch.
The defoggers will automatically turn off
after a while.
When the rear window and outside rear
view mirror defoggers switch is on, the
indicator illuminates on the rear window
and outside rear view mirror defoggers
switch.
■Using the Climate Preference
1 Press the automatic mode
switch.
2 Press the “FAST/ECO” switch.
Each time the “FAST/ECO” switch

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6-3. Do-it-yourself maintenance
Maintenance and care
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.324)
■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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6-3. Do-it-yourself maintenance
Maintenance and care
Washer fluid tank (→P.329)
Fuse boxes (→P.348)
Engine oil filler cap (→P.322)
Engine oil level dipstick (→P.321)
Battery (→P.325)
Engine coolant reservoir (→P. 3 2 4 )
Radiator (→P.324)
Condenser (→P.324)
Electric cooling fan
With the engine at operating tem-
perature and turned off, check the
oil level on the dipstick.
■Checking the engine oil
1Park the vehicle on level
ground. After warming up the
engine and turning it off, wait
more than 5 minutes for the oil
to drain back into the bottom of
the engine.
2Holding a rag under the end,
pull the dipstick out.
1KR-FE engine
M15A-FKS engine
3Wipe the dipstick clean.
4Reinsert the dipstick fully.
Checking and adding the
engine oil

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6-3. Do-it-yourself maintenance
The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir when the engine is
cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line. ( →P.405)
■Coolant selection
Only use “Toyota Super Long Life Cool-
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 clear
away any foreign objects. If either
of the above parts is extremely dirty
or you are not sure of their condi-
tion, have your vehicle inspected by
any authorized Toyota retailer or
Toyota authorized repairer, or any
reliable repairer.
Checking the coolant
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

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YARIS(HB) Owner's Manual_Europe_MK0001_en
7-2. Steps to take in an emergency
When trouble arises
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.
WARNING
■When replacing the battery
●When the vent plug and indicator
are close to the hold down clamp, the battery fluid (sulfuric acid) may leak.
●For information regarding battery replacement, contact any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
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.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
z The engine coolant tempera-
ture gauge ( →P.86, 90) is in
the red zone or a loss of
engine power is experienced.
(For example, the vehicle
speed does not increase.)
z “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” is shown on
the multi-information display.
z Steam comes out from under
the hood.
Correction procedures