2017 TOYOTA YARIS HYBRID engine overheat

13Pictorial index
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Wipers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 203, 207
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 253
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 319
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 209
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 209
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 466
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 348
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 471
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 253
Checking/rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 348
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 415, 430
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 331
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 331
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 467
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 455
Halogen headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 196
Front position lights/daytime running lights . . . . . . . . . . . P. 196
Front fog lights*2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 196
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 196
Rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Back-up light
Shifting the shift lever to R. . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 190
Rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Back-up light
Shifting the shift lever to R. . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 190
4
5
6
7
Light bulbs of the exterior lights for driving
(Replacing method: P. 378, Watts: P. 473)
*1: Vehicles with a smart entry & start system
*2: If equipped
8
9
10
11
12
13
14
15

962. Instrument cluster
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*1: These lights turn on when the power switch is turned to the “ON” position
(vehicles without a smart entry & star t system) or ON mode (vehicles with
a smart entry & start system) to indicate that a system check is being per-
formed. They will turn off after the hybrid system on, or after a few sec-
onds. There may be a malfunction in a system if a light does not come on,
or if the lights do not turn off. Have the vehicle inspected by any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional.
*2: If equipped
*3: The light flashes to indicate that the system is operating.
*4: This light illuminates on the center panel.
*5: The light comes on when the system is turned off.
*6: The light comes on when system settings are changed.
*7: The light flashes in yellow to indicate that the vehicle is deviating from the
lane.
EV indicator ( P. 77)
“PASSENGER AIR BAG” indicator
( P. 52) “READY” indicator
( P. 178, 182)
WARNING
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not
come on when you start the hybrid system, this could mean that these sys-
tems are not available to help protect you in an accident, which could result
in death or serious injury. Have the vehicle inspected by any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional immediately if this occurs.
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 turns on. In this case, immediately stop the vehicle
in a safe place, and check the engine after it has cooled completely.
( P. 455)
*4

1704-1. 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. 395
● 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. 191)
● 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.

1724-1. 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
dealer or repairer, or another dul y qualified and equipped professional as
soon as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when 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.

4048-2. Steps to take in an emergency
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If a war ning light tur ns on or a warning
buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(Red)
Brake system warning light (warning buzzer)*1
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
Continuing to drive the vehicle may be dangerous.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
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 dealer or repairer, or
another duly qualified and equipped professional.
(Red warning light flashers or comes on)
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. 455

4558-2. Steps to take in an emergency
8
When trouble arises
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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
1
2
3
1
2

4588-2. Steps to take in an emergency
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Start the hybrid system and check for the hybrid system overheat
warning light.
If the warning light does not go off:
Stop the hybrid system and contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional.
If the warning light goes off:
Have the vehicle inspected at the nearest authorized Toyota dealer
or repairer, or another duly qualified and equipped professional.
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.
● Check that the “READY” indicator is off.
● On hybrid vehicles, the gasoline engine may automatically start, or the
cooling fan may suddenly operate even if the gasoline engine stops. Do
not touch or approach rotating parts such as the fan, which may lead to fin-
gers 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

491Alphabetical index
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Engine
“ACC” position....................... 179
Accessory mode ................... 183
Compartment ........................ 335
Engine switch ................ 178, 182
Hood ..................................... 331
How to start
the hybrid system ....... 178, 182
Identification number............. 465
If your vehicle has to be
stopped in an emergency ... 395
Ignition switch
(power switch) ............ 178, 182
Overheating .......................... 455
Power switch ................. 178, 182
Engine coolant ......................... 339
Capacity ................................ 469
Checking ............................... 339
Preparing and checking
before winter....................... 253
Engine coolant temperature
warning light .......................... 404
Engine oil.................................. 336
Capacity ................................ 467
Checking ............................... 336
Oil pressure warning light ..... 404
Preparing and checking
before winter....................... 253
Engine 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
EPS (Electric Power
Steering)................................. 244
Function ................................ 244
Warning light ......................... 405
EV drive mode.......................... 188
EV indicator................................ 77
Flat tire.............................. 415, 430
Floor mats .................................. 30
Fluid
Brake .................................... 470
Transmission ........................ 470
Washer ................................. 341
Fog lights ................................. 201
Replacing light bulbs..... 381, 389
Switch ................................... 201
Wattage ................................ 473
Follow me home system ......... 197
Front passenger’s seat belt
reminder light ........................ 407
Front position lights ................ 196
Light switch ........................... 196
Replacing light bulbs..... 383, 390
Wattage ................................ 473
F