2017 TOYOTA AYGO cooling

3607-3. Do-it-yourself maintenance
AYGO_OM_Europe_OM99Q24E
13HORN10Horn
14D/C CUT30ECU-B NO.1, ECU-B NO.2, ECU-B NO.3
15ECU-B NO.4*27.5Multi-mode manual transmission
16AM2 NO.27.5Multiport fuel injection system/sequential
multiport fuel injection system
17AM2 NO.37.5Smart entry & start system
18ICS*27.5Charging system
19EFI-MAIN*125EFI NO.3, EFI NO.4, EFI NO.5, RDI
NO.2
20ST30Starting system
21STRG LOCK7.5Steering lock system
22H-LP-MAIN25H-LP RH-LO, H-LP LH-LO, H-LP RH-HI,
H-LP LH-HI
23WIPER-S*27.5Multiport fuel injection system/sequential
multiport fuel injection system
24STA7.5
Multiport fuel injection system/sequential
multiport fuel injection system, starting
system, multi-mode manual transmis-
sion, Stop & Start system
25ECU-B NO.315Audio system, smart entry & start system
26ECU-B NO.17.5Gauges and meters
27ECU-B NO.27.5Vehicle stability control system
28J/B60Instrument fuse box
29ALT*2125
DEF, S/HTR F/R, S/HTR F/L, CANVAS
TOP, ABS NO.1, ABS NO.2, RDI NO.1,
FOG FR, DRL
30AMT*350Multi-mode manual transmission
BBC*440Stop & Start system
31EPS50Electric power steering system
32RDI NO.1
50*1
Electric cooling fan30*5
40*5
FuseAmpereCircuit

3627-3. Do-it-yourself maintenance
AYGO_OM_Europe_OM99Q24E
■Driver ’s side instrument panel
FuseAmpereCircuit
1IG1 NO.25
Back-up light, multiport fuel injection sys-
tem/sequential multiport fuel injection
system, audio system, vehicle stability
control system
2WASHER15Windshield washer, rear window washer
3ECU-IG NO.15
Main body ECU, gauges and meters, air
conditioning system, rear window defog-
ger, outside rear view mirror defoggers,
seat heaters, canvas top, audio system,
PCS system
4ECU-IG NO.25Electric power steering system, Stop &
Start system
5WIPER RR15Rear window wiper
6IG1 NO.15Electric cooling fan, anti-lock brake sys-
tem, vehicle stability control system
7WIPER25Windshield wiper
8MIR HTR10Outside rear view mirror defoggers
9P/OUTLET15Power outlet
10ECU-ACC7.5Outside rear view mirrors, audio system,
Stop & Start system, gauges and meters

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

4388-2. Steps to take in an emergency
AYGO_OM_Europe_OM99Q24E
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditioning system on to check
that the radiator cooling fan operate and to check for coolant leaks
from the radiator or hoses.
The fan operate when the air conditioning system is turned on immediately
after a cold start. Confirm that the fan is operating by checking the fan
sound and air flow. If it is difficult to check these, turn the air conditioning
system on and off repeatedly. (The fan may not operate in freezing tem-
peratures.)
If the fan is not operating:
Stop the engine immediately and contact any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
If the fan is operating:
Have the vehicle inspected at the nearest any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
1KR engineHM01 engine

4398-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM99Q24E
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● 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.
● Keep hands and clothing (especially a tie, a scarf or a muffler) away from
the fan and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
● Do not loosen the radiator cap (1KR engine only) and the coolant reservoir
cap while the engine and radiator are hot. High temperature steam or cool-
ant could spray out.
NOTICE
■ When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding
cool coolant to a hot engine too quickly can cause damage to the engine.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust,
etc.).
● Do not use any coolant additives.

4519-1. Specifications
9
Vehicle specifications
AYGO_OM_Europe_OM99Q24E
1KR engine
*: The identification code is indicated
at the locations shown in the illus-
tration.
Cooling system
Capacity
(Reference)
0Q011,
0Q021*3.6 L (3.8 qt., 3.2 Imp.qt.)
0Q090*4.3 L (4.5 qt., 3.8 Imp.qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-
silicate, non-amine, non- nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology
Do not use plain water alone.
On the back side

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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