coolant temperature TOYOTA YARIS iA 2017 Owners Manual (in English)

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2-8. Driving Tips
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Before Driving
Winter Driving
Carry emergency gear, including tire chains, window scraper, flares, a
small shovel, jumper cables, a nd a small bag of sand or salt.
Ask your Toyota dealer to check the following: • Have the proper ratio of antifreeze in the radiator. Refer to Engine Coolant on P. 425.
• Inspect the battery and its cables . Cold reduces battery capacity.
• Use an engine oil appropriate for the lowest ambient temperatures that the vehicle will be driven in ( →P. 422).
• Inspect the ignition sy stem for damage and loose connections.
• Use washer fluid made with antifreeze ⎯but do not use engine cool-
ant antifreeze for washer fluid ( →P. 429).
●Do not use the parking brake in freezing weather as it may freeze. Instead,
shift to 1 or R with a manual transaxle and to P with an automatic transaxle.
Block the rear wheels.
● Remove snow before driving. Snow left on the windshield is dangerous as it
could obstruct vision.
● Do not apply excessive force to a window scraper when removing ice or fro-
zen snow on the mirror glass and windshield.
● Never use warm or hot water for removing snow or ice from windows and
mirrors as it could result in the glass cracking.
● Drive slowly. Braking performance can be adversely affected if snow or ice
adheres to the brake components. If this situation occurs, drive the vehicle
slowly, releasing the accelerator pedal and lightly applying the brakes sev-
eral times until the brake performance returns to normal.

YARIS iA_OM_OM99N89z_(U)
1573-2. Combination Meter and Display
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When Driving
These lights turn on or flash to notify the user of the system operation
status or a system malfunction.
*1: The light turns on when the ignition is switched on for an operation chec\
k, and turns off a few seconds later or when the engine is started. If the light
does not turn on or remains turned on, have the vehicle inspected at your
Toyota dealer.
*2: The light turns on continuously when the parking brake is applied.
Warning Lights
*1Master Warning Light
(→P. 501)*1Air Bag/Front Seat Belt
Pretensioner System
Warning Light ( →P. 501)
*1, 2Brake System Warning
Light (→P. 501) Low Fuel Warning Light
(
→P. 501)
*1ABS Warning
Light ( →P. 501)*1Check Fuel Cap
Warning Light ( →P. 501)
*1Charging System
Warning Light (→P. 501) Seat Belt Warning Light
(Front seat) (
→P. 501)
*1Engine Oil Warning
Light (→P. 501) Door-Ajar Warning Light
(
→P. 501)
*1Check Engine Light
(→P. 501)
(If equipped)
Low Washer Fluid Level
Warning Light ( →P. 501)
*1
(Red)
High Engine Coolant
Temperature Warning
Light (→P. 501)*1
(If equipped)
Tire Pressure Monitoring
System Warning Light
(→P. 501)
*1
(If equipped)
Automatic Transaxle
Warning Light ( →P. 501)*1
(Red)
KEY Warning Light
(→P. 501)
*1Power Steering
Malfunction Indicator
Light ( →P. 501)
(Amber)
(If equipped)
Smart City Brake
Support (SCBS)
Warning Light ( →P. 501)

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YARIS iA_OM_OM99N89z_(U)
3-2. Combination Meter and Display
These lights turn on or flash to notify the user of the system operation
status or a system malfunction.
*1: The light turns on when the ignition is switched on for an operation chec\
k, and turns off a few seconds later or when the engine is started. If the light
does not turn on or remains turned on, have the vehicle inspected at your
Toyota dealer.
Indicator Lights
(Green)
KEY Indicator Light
(→P. 142) Headlight High-Beam
Indicator Light
(
→P. 176, 176)
*1
(If equipped)
Wrench Indicator Light
(→P. 159) Turn Signal/Hazard
Warning Indicator Lights
(
→P. 180, 186)
*1TCS/DSC Indicator
Light ( →P. 195, 197)*1Security Indicator Light
(→P. 122)
*1DSC OFF Indicator Light
(→P. 197)
(Amber)
(If equipped)
Cruise Main Indicator
Light ( →P. 214)
*1
(Red)
(If equipped)
Smart City Brake
Support (SCBS)
Indicator Light ( →P. 209)
(Green)
(If equipped)
Cruise Set Indicator
Light (→P. 214)
*1
(If equipped)
Smart City Brake
Support (SCBS) OFF
Indicator Light ( →P. 210)
(If equipped)
Select Mode Indicator
Light (→P. 202)
(Blue)
Low Engine Coolant
Temperature Indicator
Light (→P. 159) Lights-On Indicator Light
(
→P. 175)
(If equipped)
Shift Position Indication
(→P. 165)*1Front Passenger
Air Bag Deactiva-
tion Indicator
Light ( →P. 78)

YARIS iA_OM_OM99N89z_(U)
2414-1. Climate Control System
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Interior Features
Set the mode selector dial to the position.
Set the temperature control dial to the cold position.
Set the fan control dial to the desired speed.
Turn on the air conditioner by pressing the A/C switch.
After cooling begins, adjust the fan control dial and temperature
control dial as needed to maintain maximum comfort.
● When maximum cooling is desired, set the temperature control dial to the
extreme cold position and set the air intake selector to the recirculated air
position, then set the fan control dial to position 4.
● If warmer air is desired at floor level, set the mode selector dial to the
position and adjust the temperature control dial to maintain maximum com-
fort.
● The air to the floor is warmer than air to the face (except when the tempera-
ture control dial is set at the extreme hot or cold position).
Cooling
NOTICE
If the air conditioner is used while driving up long hills or in heavy traffic,
monitor the engine coolant temperature warning light to see if it is illumi-
nated or flashing ( →P. 148).
The air conditioner may cause engine overheating. If the warning light is
illuminated or flashing, turn the air-conditioning off ( →P. 496).
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YARIS iA_OM_OM99N89z_(U)
5-3. Owner Maintenance
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Maintenance and Care
Engine Coolant
Inspect the antifreeze protection and coolant level in the coolant res-
ervoir at least once a year—at t he beginning of the winter season—
and before traveling where temperatures may drop below freezing.
Inspect the condition and connecti ons of all cooling system and
heater hoses.
Replace any that are swollen 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 reservoir to pro-
vide freezing and corrosion protecti on and to bring the level to F.
Securely tighten the coolant reserv oir tank cap after adding coolant.
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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4265-3. Owner Maintenance
YARIS iA_OM_OM99N89z_(U)
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, parts of the
engine compartment can become very hot. You could be burned. Carefully
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. The fan could
continue running indefinitely even if the engine has stopped and the engine
compartment temperature is high. You could be hit by the fan and 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.

YARIS iA_OM_OM99N89z_(U)
4695-4. Appearance Care
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Maintenance and Care
• When cleaning the plastic lenses of the lights, do not use gasoline,
kerosene, rectified spirit , paint, thinner, highly acidic detergents, or
strongly alkaline detergents. Otherwise, these chemical agents can
discolor or damage the surfaces resulting in a significant loss in
functionality. If plastic parts beco me inadvertently exposed to any of
these chemical age nts, flush with water immediately.
• If plastic parts such as the bu mpers become inadvertently exposed
to chemical agents or fluids such as gasoline, oil, engine coolant, or
battery fluid, it could cause discoloration, stai ning, or paint peeling.
Wipe off any such chemical agents or fluids using a soft cloth imme-
diately.
• High water temperature and high water pressure car washers are available depending on the type of high pressure car washer
device. If the car washer nozzle is put too close to the vehicle or
aimed at one area for an extended period of time, it could deform
plastic parts or damage the paint.
• Do not use wax containing compounds (polish). Otherwise, it could
result in paint damage.
• In addition, do not use an electrical or air tool to apply wax. Other- wise, the frictional heat generat ed could result in deformation of
plastic parts or paint damage.
NOTICE
● Do not use any detergent other than mild detergent. Before using any
detergent, verify the ingredients.
Otherwise, the product could discolor or stain the aluminum wheels.
● Do not use a wire brush or any abrasive cleaner, polishing compound, or
solvent on aluminum wheels. They may damage the coating.
● Always use a sponge or soft cloth to clean the wheels.
Rinse the wheels thoroughly with lukewarm or cold water. Also, be sure to
clean the wheels after driving on dusty or salted roads to help prevent cor-
rosion.
● Avoid washing your vehicle in an automatic car wash that uses high-speed
or hard brushes.
Plastic Part Maintenance

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YARIS iA_OM_OM99N89z_(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 tr ansaxle 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 the 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 engine after
the temperature has decreased.
When cool, check the coolant level.
If it is low, look for coolant leaks from the radiator and hoses.
■If you find a leak or other damage , or if coolant is still leaking:
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 iA_OM_OM99N89z_(U)
4976-5. Overheating
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If Trouble Arises
■If you find no problems, the engine is cool, and no leaks are
obvious:
Carefully add coolant as required (→P. 425).
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. The fan could
continue running indefinitely even if the engine has stopped and the engine
compartment temperature is high. You could be hit by the fan and 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 engine
Steam from an overheated engine is dangerous. The escaping steam 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, have the cool-
ing system inspected. The engine could be seriously damaged unless
repairs are made. Consult your Toyota dealer.

5026-7. Warning/Indicator Lights and Warning Sounds
YARIS iA_OM_OM99N89z_(U)
Charging System Warning LightIf the warning light illuminates while driving, it indicates a
malfunction of the alternator or of the charging system.
Drive to the side of the road and park off the right-of-way.
Consult your Toyota dealer.
Engine Oil Warning LightThis warning light indicates low engine oil pressure.
If the light illuminates or the warning indication is dis-
played while driving:
Drive to the side of the road and park off the right-of-
way on level ground.
Turn off the engine and wait 5 minutes for the oil to
drain back into the oil pan.
Inspect the engine oil level P. 424. If it’s low, add the
appropriate amount of engine oil while being careful
not to overfill.
Start the engine and check the warning light.
If the light remains illuminated even though the oil level is
normal or after adding oil, stop the engine immediately
and have your vehicle towed to your Toyota dealer.
(Red)
High Engine Coolant Temperature Warning Light The light flashes when the engine coolant temperature is
extremely high, and illuminates when the engine coolant
temperature increases further.
Handling Procedure:
• Flashing lightDrive slowly to reduce engine load until you can find a
safe place to stop the vehicle and wait for the engine to
cool down.
• Illuminated light This indicates the possibility of overheating. Park the
vehicle in a safe place immediately and stop the engine.
Refer to Overheating P. 496.
Power Steering Malfunction Indicator Light
The light illuminates/flashes if the electric power steering
has a malfunction.
If the light illuminates/flashes, stop the vehicle in a safe
place and do not operate the steering wheel. There is no
problem if the light turns off after a while. Contact your
Toyota dealer if the light illuminates/flashes continuously.
SignalWarning
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