battery TOYOTA YARIS 2022 Workshop Manual

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6-3. Do-it-yourself maintenance
6-3.Do-it-y ours elf main ten ance
Do-it-yourself ser vice
precautions
If you perform maintenance by
yourself, be sure to follow the
correct procedure as given in
these sections.
Maintenance
ItemsParts and tools
12-volt bat-
tery condi-
tion
( P.330)
•Warm water
• Baking soda
• Grease
• Conventional wrench
(for terminal clamp
bolts)
Engine/powe
r control unit
coolant level
( P.327)
• “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.325)
• “Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for
adding engine oil)
Fuses
( P.354)
• Fuse with same
amperage rating as
original
Hybrid bat-
tery (traction
battery) air
intake vent
( P.348)
• Vacuum cleaner, etc.
• Flathead screwdriver
Light bulbs
( P.357)
• Bulb with same num-
ber and wattage rating
as original
• Flathead screwdriver
•Wrench
Radiator and
condenser
( P.329)

Tire inflation
pressure
( P.342)
• 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
●Make sure that the “ACCESSORY” or “IGNITION ON” on the multi-information display and the
“READY” indicator are both off.
ItemsParts and tools

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6-3. Do-it-yourself maintenance
Maintenance and care
WARNING
●Keep hands, clothing and tools away from the moving fan.
●Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other flu-ids 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 12- volt battery. Fuel and 12-volt battery fumes are flammable.
●Be extremely cautious when work-ing on the 12-volt battery. It con-
tains poisonous 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 power switch is OFF.
With the power 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.329)
■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.

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6-3. Do-it-yourself maintenance
Maintenance and care
Washer fluid tank (P.329)
Fuse boxes ( P.354)
Power control unit coolant reservoir ( P.327)
Engine oil filler cap ( P.326)
Engine oil level dipstick ( P.326)
Engine coolant reservoir ( P. 3 2 7 )
Radiator ( P.329)
Condenser ( P.329)
Electric cooling fan
■12-volt battery
 P. 3 3 0
With the engine at operating tem-
Engine compartment
Components
Checking and adding the
engine oil

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6-3. Do-it-yourself maintenance
The 12-volt battery is located in the
right-hand side of the rear seats.
1 Remove the screws.
2 Remove the clips from the
claws.
3 Slide the tabs out of the
notches.
■Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flam-mable and explosive. Therefore,
observe the following precautions before recharging:
●If recharging with the 12-volt battery installed on the vehicle, be sure to dis-connect the ground cable.
●Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12-volt battery.
■After recharging/reconnecting the 12-volt 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 12-volt battery. If this happens, use
the wireless remote control or the mechanical key to lock/unlock the doors.
●Start the hybrid system with the power switch in ACC. The hybrid system
may not start with the power switch turned off. However, the hybrid sys-tem will operate normally from the
second attempt.
●The power switch mode is recorded
by the vehicle. If the 12-volt battery is reconnected, the vehicle will return the power switch mode to the status it
was in before the 12-volt battery was disconnected. Make sure to turn off the power before disconnecting the
12-volt battery. Take extra care when connecting the 12-volt battery if the power 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.
12-volt batter y
Location
Removing the 12-volt bat-
tery cover

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6-3. Do-it-yourself maintenance
Maintenance and care
Make sure that the 12-volt battery
terminals are not corroded and that
there are no loose connections,
cracks, or loose clamps.
WARNING
■Chemicals in the 12-volt battery
The 12-volt battery contains poison-
ous and corrosive sulfuric acid and may produce hydrogen gas which is flammable and explosive. To reduce
the risk of death or serious injury, take the following precautions while work-ing on or near the 12-volt battery:
●Do not cause sparks by touching the 12-volt battery terminals with
tools.
●Do not smoke or light a match near
the 12-volt battery.
●Avoid contact with eyes, skin and
clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the 12-volt bat-
tery.
●Keep children away from the 12-
volt battery.
■Where to safely charge the 12-
volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-
volt battery in a garage or closed room where there is insufficient venti-lation.
■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-lyteDrink a large quantity of water or
milk. Get emergency medical atten- tion immediately.
■When replacing the 12-volt bat-tery
Use a 12-volt battery designed for this
vehicle. Failure to do so may cause gas (hydrogen) to enter the passen-ger compartment, causing a fire or
explosion.
For replacement of the 12-volt battery, contact any authorized Toyota retailer
or Toyota authorized repairer, or any reliable repairer.
NOTICE
■When recharging the 12-volt bat-
tery
Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.
Exterior

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6-3. Do-it-yourself maintenance
Remove the dust from the air intake
vent with a vacuum cleaner, etc.
Make sure to only use a vacuum to
suck out dust and clogs. Attempting to
blow out dust and clogs using an air-
gun, etc. may push it into the air intake
vent. ( P.350)
If dust and clogs cannot be com-
pletely removed with the air intake
vent cover installed, remove the
cover and clean the filter.
1 Turn the power switch off.
2 Using a flathead screwdriver,
remove the air intake vent cover.
1 Pull the cover as shown in the
illustration to disengage the 2
claws, starting from the claw in
the upper right corner.
2 Pull the cover toward the side of
the vehicle to remove it.
3 Remove the air intake vent filter.
1 Disengage the 2 claws as
shown in the illustration.
2 Disengage the 2 tabs and
Cleaning the hybrid bat-
ter y (traction batter y)
air intake vent and filter
To prevent the fuel economy
from being affected, visually
inspect the hybrid battery
(traction battery) air intake
vent periodically for dust and
clogs. If it is dusty or clogged
or if “Maintenance Required
for Traction Battery Cooling
Parts See Owner’s Manual” is
displayed on th e multi-infor-
mation display, clean the air
intake vent using the following
procedures:
Cleaning the air intake vent
If dust and clogs cannot be
completely removed

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6-3. Do-it-yourself maintenance
Maintenance and care
remove the filter from cover as
shown in the illustration.
4 Remove the dust and clogs from
the filter using a vacuum
cleaner, etc.
Make sure to also remove the dust and clogs from the inside of the air intake
vent cover.
5 Reinstall the filter to the cover.
1 Engage the filter to the 2 tabs as
shown in the illustration.
2 Engage the 2 claws to install the
filter.
Make sure that the filter is not crooked or deformed when installing it.
6 Install the air intake vent cover.
1 Insert the tab of the cover as
shown in the illustration.
2 Push the cover to engage the 2
claws.
■Scheduled maintenance of the air
intake vent
Refer to “Toyota Service Booklet” or “Toyota Warranty Booklet”.
■Cleaning the air intake vent
●Dust in the air intake vent may inter-fere with the cooling of the hybrid bat-
tery (traction battery). If charging/discharging of the hybrid battery (traction battery) becomes lim-
ited, the distance that the vehicle can be driven using the electric motor (traction motor) may be reduced and
the fuel economy may be reduced. Inspect and clean the air intake vent periodically.
●Improper handling of the air intake vent cover and filter may result in
damage to them. If you have any con- cerns about cleaning the filter, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reli- able repairer.
■If “Maintenance Required for Trac-tion Battery Cooling Parts See
Owner’s Manual” is displayed on the multi-information display
●If this warning message is displayed on the multi-information display, remove the air intake vent cover and

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6-3. Do-it-yourself maintenance
clean the filter. ( P.348)
●After cleaning the air intake vent, start the hybrid system and check that the
warning message is no longer dis- played.After the hybrid system is started, it
may be necessary to drive the vehicle up to approximately 20 minutes before the warning message disappears. If
the warning message does not disap- pear after driving for appropriately 20 minutes, have the vehicle inspected
by any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer.
WARNING
■When cleaning the air intake vent
●Do not use water or other liquids to clean the air intake vent. If water is
applied to the hybrid battery (trac- tion battery) or other components, a malfunction or fire may occur.
●Before cleaning the air intake vent, make sure to turn the power switch
off to stop the hybrid system.
■When removing the air intake
vent cover
Do not touch the service plug located near the air intake vent. ( P.80)
NOTICE
■When cleaning the air intake vent
When cleaning the air intake vent,
make sure to only use a vacuum to suck out dust and clogs. If a com-pressed air blow gun, etc. is used to
blow out dust and clogs, the dust or clogs may be pushed into the air intake vent, which may affect the per-
formance of the hybrid battery (trac- tion battery) and cause a malfunction.
■To prevent damage to the vehicle
●Do not allow water or foreign matter to enter the air intake vent when the
cover is removed.
●Carefully handle the removed filter
so that it will not be damaged. If the filter is damaged, have it replaced with a new filter by any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●Make sure to reinstall the filter and cover to their original positions after
cleaning.

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6-3. Do-it-yourself maintenance
Maintenance and care
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart entry & start system (if equipped) and wireless remote control
will not function properly.
●The operational range will be reduced.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032 (vehi-
cles without a smart entry & start
system), or CR2450 (vehicles
with a smart entry & start sys-
tem)
■Use a CR2032 (vehicles without a
smart entry & start system) or CR2450 (vehicles with a smart entry & start system) lithium bat-
tery
●Batteries can be purchased at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
NOTICE
●Do not install anything to the air intake vent other than the exclusive
filter for this vehicle or use the vehi- cle without the filter installed.
■If “Maintenance Required for Traction Battery Cooling Parts See Owner’s Manual” is dis-
played on the multi-information display
If the vehicle is continuously driven
with the warning message (indicating that charging/discharging of the hybrid battery [traction battery] may
become limited) displayed, the hybrid battery (traction battery) may mal-function. If the warning message is
displayed, clean the air intake vent immediately.
Wireless remote con-
trol/electronic key bat-
ter y
Replace the battery with a new
one if it is depleted.
As the key may be damaged if
the following procedure is not
performed properly, it is rec-
ommended that key battery
replacement be performed by
any authorized Toyota retailer
or Toyota authorized repairer,
or any reliable repairer.
Items to prepare

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6-3. Do-it-yourself maintenance
repairer, local electrical appliance
shops or camera stores.
●Replace only with the same or equiva-
lent type recommended by the manu- facturer.
●Dispose of used batteries according to local laws.
Vehicles without a smart entry &
start system
1 Remove the key cover.
To prevent damage to the key, cover the tip of the flathead screwdriver with a
rag.
2 Remove the battery cover.
Use a screwdriver of an appropriate size. Forcedly prying may cause the
cover damaged.
If the battery cover is difficult to remove, lift the edge to remove it.
3 Remove the depleted battery
using a small flathead screw-
driver.
When removing the battery, use a screwdriver of an appropriate size.
Insert a new battery with the “+” termi-
nal facing up.
4 Install the battery cover with the
tab facing up.
Push the entire edge of the battery
cover into the key.
5 Install the key cover.
Align the key cover with the key and then press it straight into the key.
Make sure that the key cover is securely installed without any gaps
Replacing the battery