cooling TOYOTA YARIS 2018 Owner's Manual

5838-2. Steps to take in an emergency
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When trouble arises
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Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for
coolant leaks from the radiator or hoses.
The fan operates when the air condi tioning system is turned on immedi-
ately after a cold start. Confirm that the fan is operating by checking the
fan sound and air flow. If it is difficult to check these, turn the air condi-
tioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fan is not operating:
Stop the hybrid system immediately and contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
If the fan is operating:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
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5848-2. Steps to take in an emergency
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■If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact any
authorized Toyota retailer or
Toyota authorized repairer, or
any reliable repairer.
The coolant level is satisfac-
tory if it is between the “F”
and “L” lines on the reservoir.
Reservoir
“F” line
“L” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
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5858-2. Steps to take in an emergency
8
When trouble arises
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Start the hybrid system and check for the hybrid system overheat
warning light (with monochrome display) or warning message
(with color display).
If the warning light (with monochrome display) or warning mes-
sage (with color display) does not go off:
Stop the hybrid system and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the warning light (with monochrome display) or warning mes-
sage (with color display) goes off:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
WARNING
■ To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injuries, such as burns, may result from hot coolant and steam
released under pressure.
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5868-2. Steps to take in an emergency
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NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions.
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additives.

5969-1. Specifications
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Cooling system
Capacity
(Reference)
Gasoline engine
4.5 L (4.8 qt., 4.0 Imp.qt.)
Power control unit
1.6 L (1.7 qt., 1.4 Imp.qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and non-
borate coolant with long-life hybrid organic
acid technology
Do not use plain water alone.
Ignition system
Spark plug
MakeDENSO FK16R-A8
Gap0.8 mm (0.031 in.)
NOTICE
■ Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
12-volt battery
Open voltage* at
20°C (68°F):
12.0 V or higher
If the specific voltage is lower than the standard
value, charge the battery.
(*: Voltage is checked 20 minutes after the
hybrid system and all lights are turned off.)
Charging rates 3  4 A max.

618Alphabetical index
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Care ................................... 414, 419
Aluminum wheels .................. 415
Exterior.................................. 414
Interior ................................... 419
Seat belts .............................. 423
CD player*................................ 330
Chains ....................................... 315
Child restraint system ............... 60
Fixed with a seat belt .............. 70
Fixed with an ISOFIX
rigid anchor........................... 77
Points to remember................. 61
Riding with children ................. 59
Types of child restraint
system installation
method..... ............................. 65
Using an anchor bracket ......... 83
Child safety ................................ 59
12-volt battery
precautions ................. 449, 580
Airbag precautions .................. 45
Back door precautions .......... 161
Child restraint system ............. 60
How your child should wear
the seat belt .......................... 39
Installing child restraints ......... 65
Power window lock switch .... 199
Power window precautions ... 202
Rear door child-protectors .... 157
Removed key battery
precautions......................... 480
Seat belt precautions .............. 41
Seat heater precautions........ 396
Child-protectors....................... 157
Cigarette lighter ....................... 409
Cleaning ........................... 414, 419
Aluminum wheels.................. 415
Exterior ................................. 414
Interior................................... 419
Seat belts .............................. 423
Clock ................................. 123. 130
Condenser ................................ 443
Consumption screen ............... 133
Coolant ..................................... 441
Capacity ................................ 596
Checking ............................... 441
Preparing and checking
before winter....................... 313
Cooling system ........................ 441
Hybrid system overheating ... 581
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