TOYOTA YARIS 2021 Owners Manual

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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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5Holding a rag under the end,
pull the dipstick out and check
the oil level.
Type A
Type B
Low
Normal
Excessive
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
6Wipe the dipstick and reinsert it
fully.
■Checking the oil type and pre-
paring the item needed
Make sure to check the oil type and
prepare the items needed before
adding oil.
zEngine oil selection→P.413
zOil quantity (Low → Full)
1KR-FE engine
1.1 L (1.2 qt., 1.0 Imp. qt.)
M15A-FKS engine
1.5 L (1.6 qt., 1.3 Imp. qt.)
zItem
Clean funnel
■Adding engine oil
If the oil level is below or near the
low level mark, add engine oil of the
same type as that already in the
engine.
1KR-FE engine
M15A-FKS engine
1Remove the oil filler cap by turn-
ing it counterclockwise.
2Add engine oil slowly, checking
the dipstick.

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6-3. Do-it-yourself maintenance
Maintenance and care
3Install the oil filler cap by turning
it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following
situations, oil consumption may increase, and engine oil may need to be refilled in between oil maintenance inter-
vals.
●When the engine is new, for example
directly after purchasing the vehicle or after replacing the engine
●If low quality oil or oil of an inappropri-ate viscosity is used
●When driving at high engine speeds or with a heavy load, when towing (vehicles with towing packages), or
when driving while accelerating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through heavy traffic
■After changing the engine oil
The engine oil maintenance data should be reset. Perform the following proce-dures:
1 Press / (vertical display) or
/ (horizontal display) of the
meter control switch to select .
2 Press / (vertical display) or
/ (horizontal display) to
select “Vehicle Settings” and then
press and hold .
3 Press / to select “Oil Mainte-
nance” and then press .
4 Press / to select “Yes” and
then press .
A message will be displayed on the
multi-information display when the reset procedure has been completed.
WARNING
■Used engine oil
●Used engine oil contains poten-tially harmful contaminants which may cause skin disorders such as
inflammation and skin cancer, so care should be taken to avoid pro-longed and repeated contact. To
remove used engine oil from your skin, wash thoroughly with soap and water.
●Dispose of used oil and filters only in a safe and acceptable manner.
Do not dispose of used oil and fil- ters in household trash, in sewers or onto the ground.
Call any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer, service station
or auto parts store for information concerning recycling or disposal.
●Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine dam-age
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.

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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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6-3. Do-it-yourself maintenance
Maintenance and care
Check the battery as follows.
■Battery exterior
Make sure that the battery termi-
nals are not corroded and that there
are no loose connections, cracks,
or loose clamps.
Terminals
Hold-down clamp
■Checking battery fluid
Check that the level is between the
“UPPER LEVEL/max.” and
“LOWER LEVEL/min.” lines.
“Upper line/max.” line
“Lower line/min.” line
Add distilled water before the fluid level
drops below the “Lower line/min.” line.
■Checking the battery condition
(vehicles with battery indica-
tor)
Check the battery condition by indi-
cator color.
Red and clear: Replacement is
necessary. Have the battery
checked by any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
Clear and red: Charging is nec-
essary. Have the vehicle
inspected by any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
Blue and red: Good condition
■Adding distilled water
1 Remove the vent plug.
2 Add distilled water.
If it is difficult to see the fluid level from
WARNING
■When the engine is hot
Do not touch the radiator or con-
denser as they may be hot and cause serious injuries, such as burns.
Battery

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6-3. Do-it-yourself maintenance
the side, check it by looking directly into
the cell.
LOW
O.K.
3 Put the vent plug back on and
close it securely.
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, observe the fol- lowing precautions before recharging:
●If recharging with the battery installed on the vehicle, be sure to disconnect the ground cable.
●Make sure the power switch on the
charger is off when connecting and disconnecting the charger cables to the battery.
■After recharging/reconnecting the
battery (vehicles with a smart entry & start system)
●Unlocking the doors using the smart entry & start system may not be possi-ble immediately after reconnecting the
battery. If this happens, use the wire- less remote control or the mechanical key to lock/unlock the doors.
●Start the engine with the engine switch in ACC. The engine may not
start with the engine switch turned off. However, the engine will operate nor-mally from the second attempt.
●The engine switch mode is recorded by the vehicle. If the battery is recon-
nected, the vehicle will return the
engine switch mode to the status it was in before the battery was discon-nected. Make sure to turn off the
engine before disconnecting the bat- tery. Take extra care when connecting the battery if the engine switch mode
prior to discharge is unknown.
If the system will not start even after
multiple attempts, contact any autho-
rized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■Removing the battery holder (Bat- tery size LN1)
1 Remove the bolt.
2 Detach from the fitting hole while
pulling the battery holder for-
ward.
3 Pull the battery holder forward, point
the end upward and take out.

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6-3. Do-it-yourself maintenance
Maintenance and care
■Removing the battery holder (Bat-
tery size LN2)
1 Remove the bolt.
2 Detach from the fitting hole while
pulling the battery holder for-
ward.
3 Pull the battery holder forward, point the end upward and take out.
■Installing the battery holder (Bat-tery size LN1)
1 Place the battery in the battery tray and press it toward the rear and
inside of the vehicle.
2 Point the end of the battery holder
upward.
3 Lower the battery holder down until it
makes contact with the battery tray.
4 Pull the battery holder forward and
push into the battery tray fitting hole. ( →P.328)
5 Align the battery holder with bolt hole and tighten the bolt.
15.4 N•m (1.6 kgf•m, 11.4 ft•lbf)

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6-3. Do-it-yourself maintenance
■Installing the battery holder (Bat-
tery size LN2)
1 Place the battery in the battery tray and press it toward the rear and inside of the vehicle.
2 Point the end of the battery holder upward.
3 Lower the battery holder down until it makes contact with the battery tray.
4 Pull the battery holder forward and push into the battery tray fitting hole.
( →P.328)
5 Align the battery holder with bolt hole
and tighten the bolt.
15.4 N•m (1.6 kgf•m, 11.4 ft•lbf)
■Battery size
The hole for inserting the battery holder
may differ depending on the size of the battery.
If the battery size is LN1 insert the bat-
tery holder into hole , if LN2 insert
into hole .
Battery size LN1
Battery size LN2
WARNING
■Chemicals in the battery
The battery contains poisonous and corrosive sulfuric acid and may pro-duce hydrogen gas which is flamma-
ble and explosive. To reduce the risk of death or serious injury, take the fol-lowing precautions while working on
or near the battery:
●Do not cause sparks by touching the battery terminals with tools.
●Do not smoke or light a match near the battery.

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6-3. Do-it-yourself maintenance
Maintenance and care
If the washer fluid level is at “1/2”,
add washer fluid.
WARNING
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the battery.
●Keep children away from the bat-tery.
■Where to safely charge the bat-tery
Always charge the battery in an open
area. Do not charge the battery in a garage or closed room where there is insufficient ventilation.
■Emergency measures regarding electrolyte
●If electrolyte gets in your eyesFlush your eyes with clean water for at least 15 minutes and get immedi-
ate medical attention. If possible, continue to apply water with a sponge or cloth while traveling to
the nearest medical facility.
●If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or burning, get med-ical attention immediately.
●If electrolyte gets on your clothesIt can soak through clothing on to
your skin. Immediately take off the clothing and follow the procedure above if necessary.
●If you accidentally swallow electro-lyte
Drink a large quantity of water or milk. Get emergency medical atten-tion immediately.
■When disconnecting the battery
Do not disconnect the negative (-) ter-
minal on the body side. The discon- nected negative (-) terminal may touch the positive (+) terminal, which
may cause a short and result in death or serious injury.
NOTICE
■When recharging the battery
Never recharge the battery while the
engine is running. Also, be sure all accessories are turned off.
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.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine
antifreeze instead of washer fluid. Doing so may cause streaking on the vehicle’s painted surfaces, as well as
damaging the pump leading to prob- lems of the washer fluid not spraying.
■Diluting washer fluid
Dilute washer fluid with water as nec- essary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.

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Check if the treadwear indicators
are showing on the tires. Also
check the tires for uneven wear,
such as excessive wear on one
side of the tread.
Check the spare tire condition and
pressure if not rotated.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicators is
shown by a “TWI” or “ ” mark, etc., molded into the sidewall of each tire.
Replace the tires if the treadwear indi-
cators are showing on a tire.
■When to replace your vehicle’s
tires
Tires should be replaced if:
●The treadwear indicators are showing
on a tire.
●You have tire damage such as cuts,
splits, cracks deep enough to expose
the fabric, and bulges indicating inter-
nal damage
●A tire goes flat repeatedly or cannot
be properly repaired due to the size or
location of a cut or other damage
If you are not sure, consult with any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable
repairer.
■Tire life
Any tire over 6 years old must be
checked by a qualified technician even if
it has seldom or never been used, or
damage is not obvious.
■Low profile tires (16 and 17-inch
tires)
Generally, low profile tires will wear
more rapidly and tire grip performance
will be reduced on snowy and/or icy
roads when compared to standard tires.
Be sure to use snow tires on snowy
and/or icy roads and drive carefully at a
speed appropriate for road and weather
conditions.
■If the tread on snow tires wears
down below 4 mm (0.16 in.)
The effectiveness of the tires as snow
tires is lost.
■Checking the tire valves
When replacing the tires, check the tire
valves for deformation, cracks, and
other damage.
Tires
Replace or rotate tires in
accordance with maintenance
schedules and treadwear.
Checking tires