2012 TOYOTA YARIS HYBRID overheating

353 2-5. Driving information
2
When driving
YARIS_F (including HV)_WE_52C79E
CAUTION
Follow all the instructions described in this section. Failure to do so could
cause an accident resulting in death or serious injury.
Trailer towing precautions
When towing, make sure that none of the weight limits are exceeded.
(P. 344)
Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while
descending steep or long downhill grades.
Operation of the brake pedal
Do not hold the brake pedal depressed often or for long periods of time.
Doing so may result in the brake overheating or reduce braking effects.
To avoid accident or injury
Do not use cruise control when you are towing.
Vehicles with a compact spare tire: Do not tow the vehicle with the com-
pact spare tire installed.

435 3-5. Other interior features
3
Interior features
YARIS_F (including HV)_WE_52C79E
CAUTION
Burns
Use caution when seating the following persons in a seat with the seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping
drugs, cold remedies, etc.)
Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature
of the seat and may lead to overheating.
Do not use the seat heater more than necessary. Doing so may cause
minor burns or overheating.
NOTICE
To prevent seat heater damage
Do not put heavy objects that have an uneven surface on the seat and do
not stick sharp objects (needles, nails, etc.) into the seat.
To prevent battery discharge (except hybrid vehicle)
Turn the seat heaters off when the engine is not running.
To prevent 12-volt battery discharge (hybrid vehicle)
Do not use the power outlet longer than necessary when the hybrid system
is off.

566 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Stop the vehicle immediately.
The following warnings indicate the possibility of damage to the
vehicle that may lead to an accident. Immediately stop the vehicle
in a safe place and contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low.
(Flashes or
comes on)High engine coolant temperature warning light
Indicates that the engine is overheating. (P. 635, 639)
• Flashes: Engine is overheating. Drive carefully.
• Comes on: Engine is overheated. Stop the vehicle.
Hybrid system warning light and warning buzzer
(hybrid vehicle)
Indicates a malfunction in the hybrid system.

568 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Have the vehicle inspected immediately.
Failure to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional immedi-
ately.
To prevent the clutch from overheating
Do not use the accelerator pedal or starting assist system to hold the
vehicle on a hill.
On an uphill incline, observe the following whenever possible:
• Maintain a safe distance from the vehicle ahead and avoid unneces-
sary starting off and stopping.
• Avoid using E mode on an uphill slope. This will help to avoid unneces-
sary gear changes.
Warning lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system (hybrid vehicle);
• The hybrid transmission control system (if equipped);
• The electronic engine control system;
• The electronic throttle control system;
• The electronic Multidrive control system (if equipped);
• The electronic multi-mode manual transmission control
system (if equipped);
• The emission control system; or
• The DPF catalytic converter (if equipped).
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system.

5
637 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
Overheating
If you observe the following, your vehicle may be overheating:
The high engine coolant temperature warning light flashes or comes on
or a loss of power is experienced.
Steam comes out from under the hood.
CAUTION
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.
Keep hands and clothing away from the fan and drive belt while the engine
is running.
Do not loosen the radiator cap, or the coolant reservoir cap while the
engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
Diesel engine
Have the vehicle inspected at the nearest authorized Toyota dealer
or repairer, or another duly qualified and equipped professional as
soon as possible.

5
639
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
If your vehicle overheats (hybrid vehicle)
Correction procedures
If the high engine coolant temperature warning light comes on
or flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefully lift the hood after the steam
subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the high engine coolant temperature warning light
goes off and then stop the hybrid system.
If the fan is not operating:
Stop the hybrid system immediately and call any authorized
Toyota dealer or repairer, or another duly qualified and
equipped professional.
The following may indicate that your vehicle is overheating:
The high engine coolant temperature warning light comes on or
flashes:
The engine may be overheating.
If the hybrid system overheat warning light comes on:
The power control unit may be overheating.
Follow the correction procedure as described below.

642 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79E
Overheating
The following symptoms may occur when your vehicle is overheating:
Hybrid system output decreases.
Steam comes out from the engine area.
CAUTION
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.
For vehicles with a hybrid system, there are times when the gasoline
engine automatically starts to run or the cooling fan suddenly start to oper-
ate. Do not touch or approach the rotating parts of the belt or fan. Doing so
may lead to fingers, clothes or tools getting caught, resulting in 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.

688 Alphabetical index
YARIS_F (including HV)_WE_52C79E
Brake
Fluid ...................................... 671
Parking brake ........................ 271
Brake assist.............................. 326
Break-in tips ............................. 209
Brightness control
Instrument panel light
control ................................. 291
Care
Exterior.................................. 446
Interior ................................... 451
Seat belts .............................. 452
CD player .................................. 385
Chains ....................................... 338
Child-protectors ....................... 117
Child restraint system
Baby seats, definition ............ 181
Baby seats, installation ......... 190
Child seats, definition ............ 181
Child seats, installation ......... 190
Installing CRS with ISOFIX
rigid anchors ....................... 194
Installing CRS with seat
belts .................................... 191
Installing CRS with top
straps .................................. 195
Junior seats, definition .......... 181
Junior seats, installation........ 190Child safety
Airbag precautions ................ 172
Battery precautions ....... 484, 629
Child-protectors .................... 117
Child restraint system ........... 181
How your child should wear
the seat belt ........................ 136
Installing child restraints ....... 190
Power window lock switch .... 147
Power window precautions ... 150
Removed key battery
precautions ......................... 509
Seat belt precautions ............ 137
Seat heater
precautions ......................... 435
12-volt battery
precautions ................. 492, 634
Cigarette lighter ....................... 431
Cleaning
Exterior ................................. 446
Interior................................... 451
Seat belts .............................. 452
Clock ......................................... 428
Condenser ................................ 481
Cooling system
Engine overheating ............... 635
Hybrid system overheating ... 639
Cruise control
Cruise control........................ 311
Indicator ................................ 311
Cup holders.............................. 422
Curtain shield airbags ............. 166
Customizable features ............ 682
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