2015 TOYOTA AYGO cooling

3257-3. Do-it-yourself maintenance
7
Maintenance and care
AYGO_EE_OM99J92E
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

3277-3. Do-it-yourself maintenance
7
Maintenance and care
AYGO_EE_OM99J92E
■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
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

3978-2. Steps to take in an emergency
8
When trouble arises
AYGO_EE_OM99J92E
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 fans or engine drive belt.

3988-2. Steps to take in an emergency
AYGO_EE_OM99J92E
If your vehicle overheats
●The high engine coolant temperature warning light (→P. 352, 353)
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 fans
If a large amount of coolant leaks, immediately contact any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional.
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
X1KR engineXHM01 engine
1
2

4008-2. Steps to take in an emergency
AYGO_EE_OM99J92E
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 fans operate and to check for coolant leaks
from the radiator or hoses.
The fans operate when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking the
fan sound and air flow. If it is difficult to check these, turn the air condition-
ing system on and off repeatedly. (The fans may not operate in freezing
temperatures.)
If the fans are not operating:
Stop the engine immediately and contact any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Toyota
dealer or repairer, or another duly qualified and equipped profes-
sional.
5
X1KR engineXHM01 engine
6
7

4018-2. Steps to take in an emergency
8
When trouble arises
AYGO_EE_OM99J92E
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 fans 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.

4139-1. Specifications
9
Vehicle specifications
AYGO_EE_OM99J92E
X1KR 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

430Alphabetical index
AYGO_EE_OM99J92E
Clock ......................................... 278
Condenser ................................ 303
Cooling system
Engine overheating ............... 398
Cup holders .............................. 272
Curtain shield airbags ............... 34
Customizable features ............ 421
Daytime running light
system .................................... 169
Defogger
Outside rear view
mirrors ........................ 258, 264
Rear window ................. 258, 264
Windshield .................... 258, 264
Dimension ................................ 406
Display
Multi-information display ......... 85
Trip information ....................... 85
Do-it-yourself maintenance .... 290
Doors
Back door .............................. 107
Door glasses ......................... 133
Door lock ....................... 102, 107
Open door warning buzzer.... 114
Open door warning light ........ 355
Outside rear view mirrors ...... 131
Rear door
child-protectors ................... 105
Side doors ............................. 102
Driving ...................................... 140
Break-in tips .......................... 142
Correct posture ....................... 28
Procedures............................ 140
Winter drive tips .................... 196
Electric Power Steering
(EPS)....................................... 191
Function ................................ 191
Warning light ......................... 354
Electronic key ............................ 92
Battery-saving function ......... 115
If the electronic key does not
operate properly ................. 391
Replacing the battery ............ 319
Emergency, in case of
If the electronic key does not
operate properly ................. 391
If the engine will not start ...... 388
If the shift lever cannot be
shifted ................................. 390
If the vehicle has discharged
battery ................................ 394
If the warning buzzer
sounds................................ 352
If the warning light
turns on .............................. 352
If you have a flat tire ..... 361, 374
If you lose your keys ............... 94
If you think something is
wrong.................................. 350
If your vehicle becomes
stuck ................................... 402
If your vehicle needs to be
towed .................................. 345
If your vehicle overheats ....... 398
Emergency brake signal ......... 191
Emergency flashers ................ 342
Emergency tire puncture
repair kit ................................. 374
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