2021 TOYOTA YARIS HATCHBACK engine coolant

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YARIS(HB) Owner's Manual_Europe_MK0001_en
6-3. Do-it-yourself maintenance
6-3.Do-it-y ours elf main ten ance
Do-it-yourself service
precautions
If you perform maintenance by
yourself, be sure to follow the
correct procedure as given in
these sections.
Maintenance
ItemsParts and tools
Battery con-
dition
( →P.325)
•Warm water
• Baking soda
• Grease
• Conventional wrench
(for terminal clamp
bolts)
Engine cool-
ant level
( →P.324)
• “Toyota Super Long
Life Coolant” or a simi-
lar high quality eth-
ylene glycol-based
non-silicate, non-
amine, non-nitrite and
non-borate coolant
with long-life hybrid
organic acid technol-
ogy.
“Toyota Super Long
Life Coolant” is pre-
mixed with 50% cool-
ant and 50% deionized
water.
• Funnel (used only for
adding coolant)
Engine oil
level
( →P.321)
• “Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for
adding engine oil)
Fuses
( →P.348)
• Fuse with same
amperage rating as
original
Light bulbs
( →P.351)
• Bulb with same num-
ber and wattage rating
as original
• Flathead screwdriver
•Wrench
Radiator,
condenser
( →P.324)
⎯
Tire inflation
pressure
( →P.340)
• Tire pressure gauge
• Compressed air
source
Washer fluid
( →P.329)
• Water or washer fluid
containing antifreeze
(for winter use)
• Funnel (used only for
adding water or
washer fluid)
WARNING
The engine compartment contains many mechanisms and fluids that
may move suddenly, become hot, or become electrically energized. 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.
ItemsParts and tools

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YARIS(HB) Owner's Manual_Europe_MK0001_en
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

321
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YARIS(HB) Owner's Manual_Europe_MK0001_en
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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7-2. Steps to take in an emergency
reliable repairer.
5 Securely attach cables or chains
to the towing eyelet.
Take care not to damage the vehicle body.
6 Enter the vehicle being towed
and start the engine.
If the engine does not start, turn the engine switch to ON.
7 Shift the shift lever to N and
release the parking brake.
Multidrive: When the shift lever
cannot be shifted: →P. 1 6 5
■While towing
If the engine is not running, the power
assist for the brakes and steering will not function, making steering and brak-ing more difficult.
■Wheel nut wrench*1, 2
Wheel nut wrench is installed in luggage
compartment. ( →P.390)*1: If equipped
*2: If your vehicles does not provide a
wheel nut wrench, you can purchase
it from any authorized Toyota retailer
or Toyota authorized repairer, or any
reliable repairer.
z Fluid leaks under the vehicle.
(Water dripping from the air con-
ditioning after use is normal.)
z Flat-looking tires or uneven tire
wear
z Engine coolant temperature
gauge needle continually points
higher than normal.
z Changes in exhaust sound
z Excessive tire squeal when cor-
nering
z Strange noises related to the
suspension system
z Pinging or other noises related to
the engine
z Engine missing, stumbling or
running roughly
z Appreciable loss of power
If you think something is
wrong
If you notice any of the follow-
ing symptoms, your vehicle
probably needs adjustment or
repair. Contact any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

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7-2. Steps to take in an emergency
■Brake system warning light (warning buzzer)
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■Charging system warning light*
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then goes
off, this does not necessarily indicate a malfunction in the system.
However, if this continues to occur, have the vehicle inspected by
any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
Indicates that:
z The brake fluid level is low; or
z The brake system is malfunctioning
→ Immediately stop the vehicle in a safe place and contact
any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer. Continuing to drive the
vehicle may be dangerous.
Warning lightDetails/Actions
Indicates that the engine coolant temperature is excessively high
→ Immediately stop the vehicle in a safe place.
Handling method ( →P.405)
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging system
→ Immediately stop the vehicle in a safe place and contact
any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.

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YARIS(HB) Owner's Manual_Europe_MK0001_en
7-2. Steps to take in an emergency
●RSA (Road Sign Assist) (if equipped)
●Dynamic radar cruise control (if equipped)
■If “Pre-Collision System Unavail-
able See Owner’s Manual”, “Pre- Collision System Out of Tempera-ture Range Unavailable See
Owner’s Manual” or “Pre-Collision System Radar In Self Calibration Unavailable See Owner’s Manual”
is displayed
The following systems may be sus- pended until the problem shown in the
message is resolved. ( →P.191, 368)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Dynamic radar cruise control
■If “Oil Maintenance Required Soon” is displayed
Indicates that the engine oil should be
scheduled to be changed.
Check the engine oil and change it if necessary.
After changing the engine oil, make sure to reset the message. ( →P.323)
■If “Oil Maintenance Required Visit Your Dealer” is displayed
Indicates that the engine oil should be changed.
Check and change the engine oil, and
oil filter by any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer. After changing the engine
oil, make sure to reset the message. ( →P.323)
■If “Radar Cruise Control Unavail- able See Owner’s Manual” is dis-
played (if equipped)
The dynamic radar cruise control sys- tem is suspended temporarily or until
the problem shown in the message is resolved. (causes and coping methods: → P.191)
■If “Radar Cruise Control Unavail-
able” is displayed (if equipped)
The dynamic radar cruise control sys-
tem cannot be used temporarily. Use the
system when it becomes available again.
■If a message that indicates the need for visiting your Toyota dealer
is displayed
The system or part shown on the multi- information display is malfunctioning.
Have the vehicle inspected by any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer immediately.
■If a message that indicates the need for referring to Owner’s Man-ual is displayed
●If “Engine Coolant Temp High” is dis-played, follow the instructions accord-
ingly. ( →P.405)
●If “Transmission Oil Temp. High” is
displayed, follow the instructions accordingly. ( →P.164)
●If “Exhaust Filter Full” is displayed, fol- low the instructions accordingly. ( →P.267)
●If any of the following messages are displayed on the multi-information dis-
play, it may indicate a malfunction. Have the vehicle inspected by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer immediately.• “Smart Entry & Start System Malfunc-
tion”
●If any of the following messages are
displayed on the multi-information dis- play, it may indicate a malfunction. Immediately stop the vehicle and con-
tact any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer.
• “Braking Power Low” • “12-Volt Battery Charging System Malfunction”
•“Oil Pressure Low”

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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