2017 TOYOTA YARIS HYBRID radiator

3287-3. Do-it-yourself maintenance
YARIS_HV_OM_Europe_OM52G76E
Do-it-yourself ser vice precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
12-volt battery
condition
( P. 342)
• Grease
• Conventional wrench (for terminal clamp bolts)
Engine/power
control unit
coolant level
( P. 339)
• “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 pre-mixed with
50% coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( P. 336)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P. 373)• Fuse with same amperage rating as original
Light bulbs
( P. 378)
• Bulb with same number and wattage rating as origi-
nal
• Phillips-head screwdriver
• Flathead screwdriver•Wrench
Radiator and
condenser
( P. 340)

Tire inflation
pressure
( P. 362)
• Tire pressure gauge
• Compressed air source
Washer fluid
( P. 341)
• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)

3297-3. Do-it-yourself maintenance
7
Maintenance and care
YARIS_HV_OM_Europe_OM52G76E
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 power switch is in the “LOCK” position (vehicles with-
out a smart entry & start system) or the power switch off (vehicles with a
smart entry & start system) and the “READY” indicator are both off.
● 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 fluids
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. Fuel fumes
are flammable.
● Take care because brake fluid can harm your hands or eyes and damage
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
Vehicles without a smart entry & start system
Be sure the power switch is in the “LOCK” position.
With the power switch in the “ON” position, the electric cooling fan may
automatically start to run if the air conditioning is on and/or the coolant tem-
perature is high. ( P. 340)
Vehicles with a smart entry & start system
Be sure the power switch is off.
With the power switch in ON mode, the electric cooling fan may automati-
cally start to run if the air conditioning is on and/or the coolant temperature
is high. ( P. 340)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.

3357-3. Do-it-yourself maintenance
7
Maintenance and care
YARIS_HV_OM_Europe_OM52G76E
Engine compar tment
Fuse boxes (P. 373)
Engine oil filler cap
( P. 337)
Engine coolant radiator cap
Power control unit coolant res-
ervoir ( P. 339)
Engine coolant reservoir
( P. 339)
Engine/power control unit
coolant radiator ( P. 340)
Electric cooling fan
Condenser ( P. 340)
Engine oil level dipstick
( P. 336)
Washer fluid tank ( P. 341)
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3407-3. Do-it-yourself maintenance
YARIS_HV_OM_Europe_OM52G76E
■ 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 dealer or repairer, or
another duly qualified and equipped professional, test the cap and check for
leaks in the cooling system.
Check the radiator and condenser and clear away any foreign objects.
If any of the above parts is extremely dirty or you are not sure of their
condition, have your vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
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 stra ight 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.
Radiator and condenser
WARNING
■ When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause seri-
ous injuries, such as burns.

4558-2. Steps to take in an emergency
8
When trouble arises
YARIS_HV_OM_Europe_OM52G76E
If your vehicle overheats
●The high engine coolant temperature warning light (P. 404)
comes on or flashes, or a loss of hybrid system power is experi-
enced. (For example, the vehicle speed does not increase.)
● If the hybrid system overheat warning light (P. 408) comes on.
● Steam comes out from under the hood.
■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 dealer or
repairer, or another duly quali-
fied and equipped professional.
The following may indicate that your vehicle is overheating:
Correction procedures
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4568-2. Steps to take in an emergency
YARIS_HV_OM_Europe_OM52G76E
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL”
“LOW”
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 dealer or repairer, or another duly qualified and equipped
professional.
If the fan is operating:
Have the vehicle inspected at the nearest authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
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4578-2. Steps to take in an emergency
8
When trouble arises
YARIS_HV_OM_Europe_OM52G76E
■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 dealer or
repairer, or another duly quali-
fied and equipped professional.
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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496Alphabetical index
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PCS (Pre-Crash Safety
system) ................................... 218
Function ................................ 218
PCS switch............................ 221
Warning light ......................... 406
Personal lights ......................... 304
Switch ................................... 304
Wattage................................. 473
Portable ashtray....................... 313
Power control unit coolant
Capacity ................................ 469
Checking ............................... 339
Preparing and checking
before winter....................... 253
Radiator ................................ 340
Power outlet ............................. 314
Power steering ......................... 244
Warning light ......................... 405
Power switch .................... 178, 182
Auto power off function ......... 184
Changing the power switch
modes................................. 183
If your vehicle has to be
stopped in an emergency ... 395
Starting the hybrid
system ........................ 178, 182
Power windows ........................ 162
Jam protection function ......... 163
Operation .............................. 162
Window lock switch ............... 162
Pre-Crash Safety system
(PCS)....................................... 218
Function ................................ 218
PCS switch............................ 221
Warning light ......................... 406
Radiator .................................... 340
Radio......................................... 264
Radio data system ................... 266
RDS ........................................... 266
Rear fog light ........................... 201
Replacing light bulbs............. 389
Switch ................................... 201
Wattage ................................ 473
Rear passenger’s seat belt
reminder light ........................ 408
Rear seat .................................. 150
Folding down the rear
seatbacks ........................... 150
Rear turn signal lights............. 194
Replacing light bulbs............. 386
Turn signal lever ................... 194
Wattage ................................ 473
Rear view mirror
Inside rear view mirror .......... 157
Outside rear view mirrors...... 159
Rear view monitor*
Rear window defogger ............ 296
Rear window wiper .................. 207
Refueling .................................. 209
Capacity ................................ 466
Fuel types ..................... 209, 466
Opening the fuel tank cap ..... 209
Regenerative braking ................ 77
R