2018 TOYOTA YARIS engine overheat

15Pictorial index
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Wipers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 246, 250
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 313
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 416
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 252
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 252
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 592
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 451
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 598
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 313
Checking/rotation/tire pressure warning system*3 . . . . . . . . . P. 451
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 537, 556
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 433
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 433
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 593
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 581
Headlights/front position lights/daytime running lights/
front turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . P. 236, 238
Front fog lights*3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
Side turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 236
Rear turn signal lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 236
Back-up lights/tail lights (LED type) . . . . . . . . . . . . . . . . . . P. 238
Shifting the shift lever to R. . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 232
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 238
Rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 244
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 238
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Light bulbs of the exterior lights for driving
(Replacing method: P. 486, Watts: P. 600)
*1: Vehicles with a smart entry & start system
*2: Vehicles with monochrome display
*3: If equipped
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1162. Instrument cluster
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● By keeping the indicator needle within Eco area, more Eco-friendly driving
can be achieved.
● Charge area indicates regeneration* status. Regenerated energy will be
used to charge the hybrid battery (traction battery).
*: When used in this manual, “regeneration” refers to the conversion of
energy created by the movement of the vehicle into electrical energy.
■ Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions, etc.
There are times when the engine speed that is displayed may differ even
when vehicle operation and driving conditions are the same.
■ Outside temperature display
● In the following situations, the correct outside temperature may not be dis-
played, or the display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 25 km/h [16 mph])
• When the outside temperature has changed suddenly (at the entrance/
exit of a garage, tunnel, etc.)
● When “- -” or “E” is displayed, the system may be malfunctioning.
Take your vehicle to any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
● The temperature range that can be displayed is from -40°C (-40°F) to 50°C
(122°F).
NOTICE
■ To prevent damage to the engine and its components
The engine may be overheating if the high engine coolant temperature
warning light flashes or comes on. In this case, immediately stop the vehicle
in a safe place, and check the engine after it has cooled completely.
( P. 5 8 1 )

1202. Instrument cluster
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■ Instrument cluster brightness adjustment
The brightness level of the meters when the surroundings are day mode and
night mode can be adjusted individually.
• Day mode: When the headlight switch is off or when the headlight switch
is on but the surrounding area is bright.
• Night mode: When the headlight switch is on and the surrounding area is
dark
■ Outside temperature display
● In the following situations, the correct outside temperature may not be dis-
played, or the display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 25 km/h [16 mph])
• When the outside temperature has changed suddenly (at the entrance/
exit of a garage, tunnel, etc.)
● When “- -” or “E” is displayed, the system may be malfunctioning.
Take your vehicle to any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
● The temperature range that can be displayed is from -40°C (-40°F) to
50°C (122°F).
NOTICE
■ To prevent damage to the engine and its components
The engine may be overheating if the engine coolant temperature gauge is
in the red zone (“H”). In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. ( P. 581)

2064-1. Before driving
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WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■ When starting the vehicle
Always keep your foot on the brake pedal while stopped with the “READY”
indicator is illuminated. This prevents the vehicle from creeping.
■ When driving the vehicle
● Do not drive if you are unfamiliar with the location of the brake and accel-
erator pedals to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake
pedal will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to difficulty
in operating the pedals. Make su re to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the
vehicle only slightly. This allows you to depress the brake and accelera-
tor pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake
pedal using your left foot may delay response in an emergency, result-
ing in an accident.
● The driver should pay extra attention to pedestrians when the vehicle is
powered only by the electric motor (traction motor). As there is no engine
noise, the pedestrians may misjudge the vehicle’s movement.
● Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot
parts may cause a fire if there is any flammable material nearby.
● During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
however, power assist to the steering will be lost. This will make it more
difficult to steer smoothly, so you should pull over and stop the vehicle as
soon as it is safe to do so.
In the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: P. 507
● Use engine braking (shift lever to B) to maintain a safe speed when driving
down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. ( P. 2 3 3 )
● Do not adjust the positions of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.

2084-1. Before driving
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WARNING
■If you hear a squealing or scraping noise (brake pad wear indicators)
Have the brake pads checked and replaced by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer as soon as
possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle w hen the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
● Do not depress the accelerator pedal unnecessarily.
If the shift lever is in any position other than P or N, the vehicle may accel-
erate suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indicator is
illuminated, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.

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
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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:

5858-2. Steps to take in an emergency
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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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