2017 TOYOTA AYGO engine overheat

2264-6. Using the driving support systems
AYGO_OM_Europe_OM99Q24E
■ Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur, refrain
from excessive steering input or stop the vehicle and turn the engine off. The
EPS system should return to normal within 10 minutes.
■ Operating conditions of hill-start assist control
When the following four conditions are me t, the hill-start assist control will
operate:
● Vehicles with a multi-mode manual transmission: The shift lever is in a posi-
tion other than N (when starting off forward/backward on an upward incline).
● Vehicles with a manual transmission: The shift lever is in a position other
than R when starting off forward on an upward incline or in R when starting
off backward on an upward incline.
● The vehicle is stopped.
● The accelerator pedal is not depressed.
● The parking brake is not engaged.
■ Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
● Vehicles with a multi-mode manual transmission: The shift lever is moved to
N.
● Vehicles with a manual transmission: The shift lever is shifted to R when
starting off forward on an upward incline or from R when starting off back-
ward on an upward incline.
● The accelerator pedal is depressed.
● The parking brake is engaged.
● Approximately 2 seconds elapse after the brake pedal is released.
■ Operating conditions of emergency brake signal
When the following three conditions are met, the emergency brake signal will
operate:
● The emergency flashers are off.
● Actual vehicle speed is over 55 km/h (35 mph).
● The brake pedal is depressed in a manner that cause the system to judge
from the vehicle deceleration that this is a sudden braking operation.
■ Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
● The emergency flashers are turned on.
● The brake pedal is released.
● The system judges from the vehicle deceleration that is not a sudden brak-
ing operation.

3036-1. Using the air conditioning system and defogger
6
Interior features
AYGO_OM_Europe_OM99Q24E
WARNING
■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 unevenly weighted objects on the seat and do not stick sharp
objects (needles, nails, etc.) into the seat.
■ To prevent battery discharge
Turn the seat heaters off when the engine is not running.

377
8When trouble arises
AYGO_OM_Europe_OM99Q24E
8-1. Essential information
Emergency flashers ........... 378
If your vehicle has to
be stopped in an
emergency ....................... 379
8-2. Steps to take in
an emergency
If your vehicle needs
to be towed ...................... 381
If you think
something is wrong.......... 387
Fuel pump shut off
system ............................ 388
If a warning light turns
on or a warning buzzer
sounds ............................. 389
If you have a flat tire
(vehicles with
a spare tire) ..................... 399
If you have a flat tire
(vehicles without
a spare tire) ..................... 412
If the engine
will not start...................... 426
If the shift lever cannot
be shifted (vehicles
with a multi-mode
manual transmission) ...... 428
If the electronic key does
not operate properly
(vehicles with a smart
entry & start system)........ 429
If the vehicle battery
is discharged ................... 432
If your vehicle overheats .... 436
If the vehicle becomes
stuck ................................ 440

3898-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM99Q24E
If a warning light turns 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
Brake system warning light (warning buzzer)*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
 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.
(Flashes or comes on)
High engine coolant temperature warning light (for 1KR
engine)
Indicates that the engine is overheating.
As the coolant temperature rise, it changes from flashing
to comes on.
 P. 436

3908-2. Steps to take in an emergency
AYGO_OM_Europe_OM99Q24E
(Comes on)
High engine coolant temperature warning light (for
HM01 engine)
Indicates that the engine is overheating.
 P. 436
(Flashes)
“STOP” warning light
Indicates a malfunction in:
• Engine oil pressure is too low; or
• Engine is almost overheating.
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
(Comes on)
Multi-mode manual transmissi on warning light (vehicles
with a multi-mode manual transmission)
Indicates a malfunction in the multi-mode manual trans-
mission system.
 Have the system checked by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional.
Multi-mode manual transmission warning light (warning
buzzer) (vehicles with a multi-mode manual transmis-
sion)
Indicates a malfunction in the multi-mode manual trans-
mission system and that the clutch has become hot due to
excessive load.
 Pull over and shift the shift lever to N. Wait for about
15 minutes for the clutch to cool down. Have the sys-
tem checked by any authorized Toyota dealer or
repairer, or another duly qualified and equipped pro-
fessional.
(Flashes)
Heat clutch warning light (warning buzzer) (vehicles
with a multi-mode manual transmission)
Indicates that the clutch has become hot, but does not
indicate a malfunction in the multi-mode manual transmis-
sion system.
 Pull over and shift the shift lever to N. Wait for about
15 minutes for the clutch to cool down.
Warning lightWarning light/Details/Actions

4358-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM99Q24E
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the intended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come into contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the battery.
■ Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the battery:
● When working with the battery, always wear safety glasses and take care
not to allow any battery fluids (acid) to come into contact with skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, and
other battery-related parts.
● Do not allow children near the battery.
■ To prevent damage to the vehicle
Do not pull- or push-start the vehicle as the three-way catalytic converter
may overheat and become a fire hazard.
NOTICE
■ When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fan or engine drive belt.

4368-2. Steps to take in an emergency
AYGO_OM_Europe_OM99Q24E
If your vehicle overheats
●The high engine coolant temperature warning light (P. 389, 390)
comes on or flashes (1KR engine); comes on (HM01 engine); or a
loss of engine power is experienced. (For example, the vehicle
speed does not increase.)
● Steam comes out from under the hood.
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and
radiator core (radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immediately contact any authorized
Toyota dealer or repairer, or anot her duly qualified and equipped profes-
sional.
The following may indicate that your vehicle is overheating.
Correction procedures
1KR engineHM01 engine
1
2

468Alphabetical index
AYGO_OM_Europe_OM99Q24E
Canvas top ............................... 140
Care ................................... 316, 320
Aluminum wheels .................. 317
Canvas top ............................ 316
Exterior.................................. 316
Interior ................................... 320
Seat belts .............................. 321
Chains ....................................... 229
Child restraint system ............... 50
Fixed with a seat belt .............. 60
Fixed with an ISOFIX
rigid anchor........................... 67
Points to remember................. 51
Riding with children ................. 49
Types of child restraint system
installation method................ 55
Using an anchor bracket ......... 73
Child safety ................................ 49
Airbag precautions .................. 37
Back door precautions .......... 116
Battery precautions ....... 338, 435
Canvas top precautions ........ 141
Child restraint system ............. 50
How your child should wear
the seat belt .......................... 31
Installing child restraints.......... 55
Power window precautions ... 137
Rear door child-protectors .... 111
Removed key battery
precautions ......................... 356
Seat belt precautions .............. 32
Seat heater precautions ........ 303
Child-protectors....................... 111
Cleaning ........................... 316, 320
Aluminum wheels.................. 317
Canvas top............................ 316
Exterior ................................. 316
Interior................................... 320
Seat belts .............................. 321
Clock ......................................... 312
Condenser ................................ 338
Cooling system
Engine overheating ............... 436
CRS (Child Restraint
System) .................................... 50
Cup holders.............................. 306
Curtain shield airbags ............... 34
Customizable features ............ 459
Daytime running light
system .................................... 174
Defogger
Outside rear view
mirrors ........................ 292, 298
Rear window ................. 292, 298
Windshield .................... 292, 298
Dimension ................................ 444
Display
Drive monitor display .............. 91
Trip information ....................... 91
Do-it-yourself maintenance .... 325
Doors
Back door.............................. 113
Door glasses ......................... 137
Door lock....................... 108, 113
Open door warning buzzer ... 120
Open door warning light........ 393
Outside rear view mirrors...... 135
Rear door
child-protectors................... 111
Side doors............................. 108
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