engine overheat TOYOTA YARIS 2012 User Guide

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.

5When trouble arises
551
YARIS_F (including HV)_WE_52C79E
5-1. Essential information
Emergency flashers .......... 552
If your vehicle needs to
be towed ......................... 553
If you think something is
wrong .............................. 563
Fuel pump shut off system
(except hybrid vehicle
[gasoline engine only]).... 564
5-2. Steps to take in an
emergency
If a warning light turns on
or a warning buzzer
sounds... ........................ 565
If you have a flat tire
(vehicles with
a spare tire) .................... 582
If you have a flat tire
(vehicles with
an emergency tire
puncture repair kit).......... 594
If the engine will not start
(except hybrid vehicle).... 611
If the hybrid system will not
start (hybrid vehicle) ....... 614
If the shift lever cannot be
shifted from P (vehicles
with a hybrid transmission
or a Multidrive) ................ 616
If the shift lever cannot be
shifted (vehicles with
a multi-mode manual
transmission) .................. 617If you lose your keys ......... 618
If the electronic key does
not operate properly ....... 619
If the vehicle battery is
discharged
(except hybrid vehicle).... 624
If the vehicle’s 12-volt
battery is discharged
(hybrid vehicle) ............... 631
If your vehicle overheats
(except hybrid vehicle).... 635
If your vehicle overheats
(hybrid vehicle) ............... 639
If you run out of fuel and
the engine stalls
(diesel engine only) ........ 644
If the vehicle becomes
stuck ............................... 647
If your vehicle has to
be stopped in
an emergency ................. 650

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
571 5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
Low engine oil level warn-
ing light (diesel engine
only)
Indicates that engine oil
level is low.Check the level of engine
oil, and add if necessary.
Hybrid system overheat
warning light and warning
buzzer (hybrid vehicle)
Indicates that the hybrid
system has overheated.
This light may come on
when driving under severe
operating conditions. (For
example, when driving up
a long steep hill.)Stop and check. (P. 639)
P position request indica-
tor light (hybrid vehicle)
An attempt was made to
start the hybrid systemShift the shift lever to P.
P position request indica-
tor light and warning
buzzer (hybrid vehicle)
• Indicates that the driver’s
door was opened with the
shift lever in N, D or B.
• Indicates that the hybrid
battery (traction battery)
power has dropped
because a long period of
time has elapsed after
shifting the shift lever to N.• Shift the shift lever to P.
• Shift the shift lever to P and
restart the hybrid system
when starting the vehicle.
Warning lightWarning light/DetailsCorrection procedure

5
635
5-2. Steps to take in an emergency
When trouble arises
YARIS_F (including HV)_WE_52C79E
If your vehicle overheats (except hybrid vehicle)
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam sub-
sides and then restart the engine.
If you do not see steam:
Leave the engine running 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 engine.
If the fan is not operating:
Stop the engine immediately and call any authorized Toyota
dealer or repairer, or another duly qualified and equipped
professional.
After the engine has cooled down sufficiently, check the
engine coolant level and inspect the radiator core (radiator)
for any leaks.
Gasoline engine

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.

640 5-2. Steps to take in an emergency
YARIS_F (including HV)_WE_52C79EAfter the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the cooling system for
leaks.
Add engine coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able. (P. 667)
Have the vehicle inspected at the nearest authorized Toyota dealer or
repairer, or another duly qualified and equipped professional as soon
as possible.
If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Leave the hybrid system operating and carefully lift the hood.

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.