engine coolant TOYOTA YARIS 2018 User Guide

4427-3. Do-it-yourself maintenance
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■Coolant selection
Only use “Toyota Super Long Life Coolant” 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/power control unit coolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer, test the cap and check for leaks in the
cooling system.
WARNING
■ When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
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 mixture 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.

5168-2. Steps to take in an emergency
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If you think something is wrong
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal)
● Flat-looking tires or uneven tire wear
● Vehicles with monochrome display: High engine coolant tempera-
ture warning light flashes or comes on
Vehicles with color display: Engine coolant temperature gauge nee-
dle continually points higher than normal
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
● Engine misfire, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor
If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

5188-2. Steps to take in an emergency
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*4
*5
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
*4
(Red warning light flashers or comes on)
*5
High engine coolant temperature warning light
Indicates that the engine is overheating.
As the coolant temperature rises, it changes from flashing
to steady on.
 P. 581
*4
Hybrid system warning light (warning buzzer)
Indicates a malfunction in the hybrid system.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The hybrid transmission control system;
• The electronic engine control system;
• The electronic throttle control system; or
• The emission control system.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

5818-2. Steps to take in an emergency
8
When trouble arises
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If your vehicle overheats
●Vehicles with monochrome display: The high engine coolant tem-
perature warning light ( P. 518) comes on or flashes, or a loss of
hybrid system power is experienced. (For example, the vehicle
speed does not increase.)
Vehicles with color display:
• The needle of the engine coolant temperature gauge ( P. 1 1 7 )
enters the red zone or a loss of hybrid system power is experi-
enced.
(For example, the vehicle speed does not increase.)
• The warning message indicating overheat is shown on the multi-
information display. ( P. 531)
● Vehicles with monochrome display: If the hybrid system overheat
warning light ( P. 522) comes on.
Vehicles with color display: If the warning message indicating over-
heat is shown on the multi-information display. ( P. 535)
● Steam comes out from under the hood.
The following may indicate that your vehicle is overheating:

5828-2. Steps to take in an emergency
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■If the high engine coolant temperature warning light comes on
or flashes
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor 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
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL”
“LOW”
Radiator cap
Correction procedures
1
2
3
1
2
4
1
2
3
4

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.
6

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.

621Alphabetical index
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Engine coolant ......................... 441
Capacity ................................ 596
Checking ............................... 441
Preparing and checking
before winter....................... 313
Engine coolant temperature
warning light .......................... 518
Engine oil.................................. 438
Capacity ................................ 593
Checking ............................... 438
Oil pressure warning light ..... 518
Oil pressure warning
messages ........................... 531
Preparing and checking
before winter....................... 313
Engine switch................... 216, 220
Auto power off function ......... 225
Changing power switch
positions ............................. 217
Changing the power switch
modes................................. 222
If your vehicle has to
be stopped
in an emergency ................. 507
Starting the hybrid
system ........................ 216, 220
EPS (Electric Power
Steering) ................................. 303
Function ................................ 303
Warning light ......................... 519
EV drive mode .......................... 229
EV indicator ................................ 88
Flat tire.............................. 537, 556
Floor mats .................................. 32
Fluid
Brake .................................... 597
Transmission ........................ 597
Washer ................................. 443
Fog lights ................................. 244
Replacing light bulbs..... 489, 502
Switch ................................... 244
Wattage ................................ 600
Follow me home system ......... 239
Front passenger’s seat belt
reminder light ........................ 521
Front position lights ................ 238
Light switch ........................... 238
Replacing light bulbs..... 492, 502
Wattage ................................ 600
Front seats ............................... 182
Adjustment ............................ 182
Cleaning................................ 419
Correct driving posture ........... 34
Head restraints ..................... 188
Seat heaters ......................... 396
F

631Alphabetical index
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Warning lights .......................... 109
ABS ....................................... 519
Automatic High Beam ........... 520
Brake system ................ 517, 520
Charging system ................... 517
Cruise control indicator ......... 520
Electric power steering
system ................................ 519
Engine coolant
temperature ........................ 518
Engine oil pressure ............... 518
Engine system ...................... 518
Go to service warning ........... 524
High engine coolant
temperature ........................ 518
Hybrid system ....................... 518
Hybrid system overheat ........ 522
LDA
(Lane Departure Alert) ........ 520
Low engine oil pressure ........ 518
Low fuel level ........................ 521
Low traction battery............... 521
Malfunction indicator lamp .... 518
Master warning ..................... 522
Open door ............................. 521
P position request ................. 523
PCS (Pre-Crash Safety
system) ............................... 519
Seat belt reminder light ......... 521
Slip indicator ......................... 520
Smart entry & start
system ........................ 521, 529
SRS....................................... 518
Tire pressure ......................... 522
Warning messages .................. 531
Washer.............................. 246, 250
Checking ............................... 443
Preparing and checking
before winter....................... 313
Switch ........................... 246, 250
Washing and waxing ............... 414
Weight....................................... 590
Wheels ...................................... 470
Replacing .............................. 556
Size ....................................... 598
Window glasses....................... 199
Window lock switch ................ 199
Windows ................................... 199
Power windows ..................... 199
Rear window defogger .......... 390
Washer ......................... 246, 250
Windshield wipers ................... 246
Intermittent windshield
wipers ................................. 246
Rain-sensing windshield
wipers ................................. 247
Winter driving tips ................... 313
Wireless remote control
key .......................................... 141
Battery-saving function ......... 167
Locking/Unlocking................. 141
Replacing the battery ............ 477
WMA disc*............................... 330
*: For vehicles with navigation/multimedia system, refer to
“Navigation and multimedia system Owner’s manual”.