2020 TOYOTA YARIS cooling

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
5-3. Owner Maintenance
Engine Coolant
Inspect the antifreeze protection and coolant level in the cool ant res-
ervoir at least once a year—at the beginning of the winter seas on—
and before traveling where temperatures may drop below freezing .
Inspect the condition and connec tions of all cooling system and
heater hoses.
Replace any that are sw ollen or deteriorated.
The coolant should be at full in the
radiator and between the F and L
marks on the coolant reservoir
when the engine is cool. Cooling fan
Cooling system cap
Coolant reservoir
If it is at or near L, add enough coolant to the coolant reserv oir to pro-
vide freezing and corrosion prote ction and to bring the level to F.
Securely tighten the coolant re servoir tank cap after adding co olant.
If the coolant reservoir is empty or new coolant is required frequently,
consult your Toyota dealer.
Changing the coolant should be done by your Toyota dealer.
Inspecting Coolant Level
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3995-3. Owner Maintenance
5
Maintenance and Care
WARNING
■Do not use a match or live flame in the engine compartment. DO NOT
ADD COOLANT WHEN THE ENGINE IS HOT
A hot engine is dangerous. If the engine has been running, part s of the
engine compartment can become very hot. You could be burned. Ca refully
inspect the engine coolant in the coolant reservoir, but do not open it.
■ Pull over to a safe location, then switch the ignition to off and
make sure the fan is not running before attempting to work near the
cooling fan
Working near the cooling fan when it is running is dangerous. T he fan could
continue running indefinitely even if the engine has stopped an d the engine
compartment temperature is high. You could be hit by the fan an d seriously
injured.
■ Do not remove either cooling system cap when the engine and
radiator are hot
When the engine and radiator are hot, scalding coolant and steam may
shoot out under pressure and cause serious injury.

4005-3. Owner Maintenance
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
NOTICE
●Radiator coolant will damage paint. Rinse it off quickly if spi lled.
● Use only soft (deionized) water in the coolant mixture. Water t hat contains
minerals will cut down on the coolant’s effectiveness.
● Do not add only water. Always add a proper coolant mixture.
● The engine has aluminum parts and must be protected by an ethylene-gly-
col-based coolant to prevent corrosion and freezing.
● DO NOT USE coolants Containing Alcohol, methanol, Borate or Sil icate.
These coolants could damage the cooling system.
● DO NOT MIX alcohol or methanol with the coolant. This could dam age the
cooling system.
● Do not use a solution that contains more than 60% antifreeze.
This would reduce effectiveness.
●
Use of engine coolant specifical ly designed for the YARIS/YARIS HATCHBACK
is required when replacing engine coolant. Using engine coolant that is not spe-
cifically designed for this veh icle may cause serious damage to the engine and
cooling system. For questions on how to obtain this specially d esigned coolant,
contact your Toyota dealer.

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
4395-3. Owner Maintenance
5
Maintenance and Care
14AUDIO125 AAudio system
15A/C MAG7.5 AAir conditioner
16AT P U M P15 A—
17AT15 ATransaxle control system (if equipped),
Ignition switch
18D.LOCK25 APower door locks
19H/L RH20 AHeadlight (RH)
20ENG+B27.5 AEngine control system
21TA I L20 ATaillights, License plate lights, Parking
lights
22ST.HEATER20 AHeated steering wheel (if equipped)
23ROOM25 AFor protection of various circuits
24FOG15 AFog lights (if equipped)
25H/CLEAN20 A—
26STOP10 ABrake lights
27HORN15 AHorn
28H/L LH20 AHeadlight (LH)
29ABS/DSC S30 AABS, Dynamic stability control system
30HAZARD15 AHazard warning flashers, Turn signal lights
31FUEL PUMPSCR15 AFuel system
32FUEL WARM25 A—
33WIPER20 AWindshield wipers
34CABIN+B50 AFor protection of various circuits
35FA N 2
EPB L30 ACooling fan
36FUEL PUMP30 A—
37ABS/DSC M50 AABS, Dynamic stability control system
38EVVT20 A—
39———
DESCRIPTIONFUSE
RATINGPROTECTED COMPONENT

4405-3. Owner Maintenance
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
40FA N 1
EPB R30 ACooling fan
41FA N 340 A—
42ENG.MAIN40 AEngine control system
43EPS60 A—
44DEFOG40 ARear window defogger
45IG230 AFor protection of various circuits
46INJECTOR
ENG.SUB30 AEngine control system
47HEATER40 AAir conditioner
48P. W I N D O W 130 APower windows
49DCDC DE40 A—
DESCRIPTIONFUSE
RATINGPROTECTED COMPONENT

4806-3. Battery Runs Out
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
WARNING
■ Follow These Precautions Carefully
To ensure safe and correct handling of the battery, read the fo llowing pre-
cautions carefully before using the battery or inspecting it.
■ Keep flames and sparks away from open battery cells and do
not allow metal tools to contact the positive (+) or negative ( -) terminal
of the battery when working near a battery. Do not allow the positive (+)
terminal to contact the vehicle body
Flames and sparks near open battery cells are dangerous. Hydrog en gas,
produced during normal battery operation, could ignite and cause the bat-
tery to explode. An exploding battery can cause serious burns a nd injuries.
Keep all flames including cigarettes and sparks away from open battery
cells.
■ Keep all flames and sparks away from open battery cells
because hydrogen gas is produced from open battery cells while
charging the battery or adding battery fluid
Flames and sparks near open battery cells are dangerous. Hydrog en gas,
produced during normal battery operation, could ignite and cause the bat-
tery to explode. An exploding battery can cause serious burns a nd injuries.
Keep all flames including cigarettes and sparks away from open battery
cells.
■ Do not jump-start a frozen bat tery or one with a low fluid leve l
Jump-starting a frozen battery or one with a low fluid level is dangerous. It
may rupture or explode, causing serious injury.
■ Connect the negative cable to a good ground point away from the bat-
tery
Connecting the end of the second jumper cable to the negative ( -) terminal
of the discharged battery is dangerous.
A spark could cause the gas around the battery to explode and i njure some-
one.
■ Route the jumper cables away from parts that will be moving
Connecting a jumper cable near or to moving parts (cooling fans, belts) is
dangerous. The cable could get caught when the engine starts an d cause
serious injury.

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
6-5. Overheating
Overheating
If the high engine coolant temperature warning light turns on:
Drive safely to the side of the road and park off the right-of-way.
Put a vehicle with an automatic t ransaxle in park (P), a manual tran-
saxle in neutral.
Apply the parking brake.
Turn off the air conditioner.
Check whether coolant or steam is escaping from the engine com-
partment.
If steam is coming from the engine compartment
Do not go near the front of t he vehicle. Stop the engine.
Wait until the steam dissipates, then open the hood and start the
engine.
If neither coolant nor steam is escaping
Open the hood and idle the engine until it cools.
Make sure the cooling fan is operating, then turn off the engin e after
the temperature has decreased.
When cool, check th e coolant level.
If it is low, look for coolant lea ks from the radiator and hoses.
■If you find a leak or other damage, or if coolant is still leak ing:
Stop the engine and call your Toyota dealer.
Cooling fan
Cooling system cap
Coolant reservoir
If the high engine coolant temperature warning light turns on,
the vehicle loses power, or you hear a loud knocking or pinging
noise, the engine is probably too hot.
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
4856-5. Overheating
6
If Trouble Arises
■If you find no problems, the engine is cool, and no leaks are
obvious:
Carefully add coolant as required (P. 398).
WARNING
■ Pull over to a safe location, then switch the ignition to off and
make sure the fan is not running before attempting to work near the
cooling fan
Working near the cooling fan when it is running is dangerous. T he fan could
continue running indefinitely even if the engine has stopped an d the engine
compartment temperature is high. You could be hit by the fan an d seriously
injured.
■ Do not remove either cooling system cap when the engine and
radiator are hot
When the engine and radiator are hot, scalding coolant and steam may
shoot out under pressure and cause serious injury.
■ Open the hood ONLY after steam is no longer escaping from the e ngine
Steam from an overheated engine is dangerous. The escaping stea m could
seriously burn you.
NOTICE
● If the cooling fan does not operate while the engine is running, the engine
temperature will increase. Stop the engine and call your Toyota dealer.
● If the engine continues to overheat or frequently overheats, ha ve the cool-
ing system inspected. The engine could be seriously damaged unl ess
repairs are made. Consult your Toyota dealer.