coolant temperature TOYOTA YARIS 2019 Owners Manual (in English)

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YARIS SEDAN_OM_OM99S50z_(U)
2-9. Driving Tips
2
Before Driving
Winter Driving
Carry emergency gear, including tire chains, window scraper, flares, a
small shovel, jumper cables, and a small bag of sand or salt.
Ask your Toyota dealer to check the following:
• Have the proper ratio of ant ifreeze in the radiator.
Refer to Engine Coolant on P. 445.
• Inspect the battery and its cabl es. Cold reduces battery capacity.
• Use an engine oil appropriate for the lowest ambient temperatures that the vehicle w ill be driven in (P. 442).
• Inspect the ignition system for damage and loose connections.
• Use washer fluid made with antifreeze but do not use engine cool-
ant antifreeze for washer fluid ( P. 449).
●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 automa tic transaxle.
Block the rear wheels.
● Remove snow before driving. Snow left on the windshield is dang erous 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 windo ws 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 SEDAN_OM_OM99S50z_(U)
1593-2. Combination Meter and Display
3
When Driving
When the ignition is switched ON,
the outside temperature is dis-
played.
■Changing the Temperature Unit of the Outside Temperature
Display (Vehicles with Type B audio)
The outside temperature unit can be switched between Celsius and
Fahrenheit. Settings can be changed by operating the center dis -
play screen.
Refer to Customizabl e Features on P. 584.
●Under the following conditions, the outside temperature display may differ
from the actual outside temperature depending on the surroundings and
vehicle conditions:
• Significantly cold or hot temperatures.
• Sudden changes in outside temperature.
• The vehicle is parked.
• The vehicle is driven at low speeds.
● When the temperature unit indicated in the outside temperature display is
changed, the temperature unit indicated in the engine coolant g auge display
changes in conjunction with it.
Outside Temperature Display

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YARIS SEDAN_OM_OM99S50z_(U)
3-2. Combination Meter and Display
Warning/Indicator Lights
Warning/Indicator lights will appear in any of the highlighted areas
These lights turn on or flash to notify the user of the system operation
status or a system malfunction.
Combination Meter
Analog Speedometer Type
(With Tachometer)Center of Dashboard
Warning Lights
*1Master Warning Light
( P. 522)*1Check Engine Light
(P. 522)
*1, 2Brake System Warning
Light ( P. 522)*1
(Red)
High Engine Coolant
Temperature Warning
Light (P. 522)
*1ABS Warning
Light (P. 522)*1
(If equipped)
Automatic Transaxle
Warning Light ( P. 522)
*1Charging System
Warning Light (P. 522)*1Power Steering
Malfunction Indicator
Light (P. 522)
*1Engine Oil Warning
Light (P. 522)*1Air Bag/Front Seat Belt
Pretensioner System
Warning Light ( P. 522)

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YARIS SEDAN_OM_OM99S50z_(U)
3-2. Combination Meter and Display
*1: The light turns on when the ignition is switched on for an operation check,
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 inspect ed at your
Toyota dealer.
When the ignition is switched ON,
the wrench indicato r light is illumi-
nated and then turns off after a
few seconds.
The wrench indicator light is illu-
minated when the preset mainte-
nance period arrives. Verify the
content and perform mainte-
nance.
Refer to Maintenance Monitor on
P. 434.
(Blue)
Low Engine Coolant
Temperature Indicator
Light ( P. 165)
(If equipped)
Cruise Main Indication
(P. 226)
(If equipped)
Shift Position Indication
(P. 171)(White/
Green)
(If equipped)
Cruise Set Indication/
Indicator Light ( P. 226)
Headlight High-Beam
Indicator Light
( P. 185, 185)
(If equipped)
Select Mode Indicator
Light ( P. 214)
Turn Signal/Hazard
Warning Indicator Lights
( P. 189, 197) Lights-On Indicator Light
(
P. 181)
*1Security Indicator Light
(P. 128)*1Front Passenger
Air Bag Deactiva-
tion Indicator
Light ( P. 78)
Wrench Indicator Light

YARIS SEDAN_OM_OM99S50z_(U)
1653-2. Combination Meter and Display
3
When Driving
The light illuminates continuously
when the engine coolant tempera-
ture is low and turns off after the
engine is warm.
If the low engine coolant tempera-
ture indicator light remains illumi-
nated after the engine has been
sufficiently warmed up, the tem-
perature sensor could have a mal-
function. Consult your Toyota
dealer.
Low Engine Coolant Temperature Indicator Light (Blue)

YARIS SEDAN_OM_OM99S50z_(U)
2534-1. Climate Control System
4
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 di al to the
extreme cold position and set the air intake selector to the re circulated air
position, then turn the fan control dial fully clockwise.
● If warmer air is desired at floor level, set the mode selector dial to the
position and adjust the temperature control dial to maintain ma ximum 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. 154).
The air conditioner may cause engine overheating. If the warnin g light is
illuminated or flashing, turn the air-conditioning off ( P. 517).
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YARIS SEDAN_OM_OM99S50z_(U)
5-3. Owner Maintenance
5
Maintenance and Care
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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4465-3. Owner Maintenance
YARIS SEDAN_OM_OM99S50z_(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, 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.

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YARIS SEDAN_OM_OM99S50z_(U)
6-5. Overheating
6
If Trouble Arises
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 t he 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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5186-5. Overheating
YARIS SEDAN_OM_OM99S50z_(U)■
If you find no problems, the engine is cool, and no leaks are
obvious:
Carefully add coolant as required (
P. 445).
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.