2021 TOYOTA AYGO radiator cap

3937-3. Do-it-yourself maintenance
7
Maintenance and care
AYGO_OM_Europe_OM9A012E
Engine compartment
Engine oil filler cap
(P. 395)
Fuse box (P. 418)
Battery (P. 399)
Engine coolant reservoir
(P. 397)Radiator (P. 398)
Electric cooling fan
Condenser (P. 398)
Engine oil level dipstick
(P. 394)
Washer fluid tank (P. 402)1
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5
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3977-3. Do-it-yourself maintenance
7
Maintenance and care
AYGO_OM_Europe_OM9A012E
The coolant level is satisfactory if it is between the “FULL” or “F” and
“LOW” lines on the reservoir when the engine is cold.
Ty pe A
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
Ty pe B
Reservoir cap
“F” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“F” line.
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with
long-life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Minimum temperature: -35C [-31F])
For more details about coolant, contact any authorized Toyota retailer or Toy-
ota authorized repairer, or any reliable repairer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, drain cock
and water pump.
If you cannot find a leak, have any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer, test the cap and check for leaks in the
cooling system.
Engine coolant
1
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3

3987-3. Do-it-yourself maintenance
AYGO_OM_Europe_OM9A012E
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of
their condition, have your vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
WARNING
■ When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator and condenser
WARNING
■ When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause seri-
ous injuries, such as burns.

5058-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM9A012E
The coolant level is satisfactory if it is between the “FULL” or “F”
and “LOW” lines on the reservoir.
Radiator cap
Reservoir
“FULL” or “F”
“LOW”
Add coolant if necessary.
Water can be used in an emer-
gency 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.)
Ty pe ATy pe B
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4

5068-2. Steps to take in an emergency
AYGO_OM_Europe_OM9A012E
If the fan is not operating:
Stop the engine immediately and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
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 while the engine and radiator are hot. High
temperature steam or coolant 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.

538Alphabetical index
AYGO_OM_Europe_OM9A012E
Radiator .................................... 398
Radio ......................................... 296
Radio data system ................... 298
RDS ........................................... 298
Rear fog lights.......................... 235
Replacing light bulbs ............. 432
Switch ................................... 235
Wattage................................. 520
Rear seat................................... 185
Folding down the rear
seatbacks ........................... 185
Head restraints...................... 187
Rear turn signal lights ............. 229
Replacing light bulbs ............. 432
Turn signal lever ................... 229
Wattage................................. 520
Rear view mirror
Inside rear view mirror .......... 191
Outside rear view mirrors ...... 192
Rear view monitor system
*
Rear window defogger .... 354, 360
Rear window wiper .................. 239
Refueling .................................. 241
Capacity ................................ 512
Fuel types ..................... 241, 512
Opening the fuel tank cap ..... 243
Replacing
Electronic key battery............ 415
Fuses .................................... 418
Light bulbs............................. 426
Tires .............................. 459, 481
Wireless remote control
battery................................. 415Seat belts.................................... 32
Child restraint system
installation ............................ 67
Cleaning and maintaining
the seat belt........................ 383
Emergency Locking
Retractor............................... 33
How to wear your seat belt ..... 32
How your child should wear
the seat belt.......................... 33
Pregnant women, proper
seat belt use ......................... 34
Reminder light and buzzer .... 453
Seat belt pretensioners ........... 33
SRS warning light ................. 451
Seat heaters ............................. 364
Seats ................................. 183, 185
Adjustment ............................ 183
Adjustment
precautions................. 184, 186
Child seats/child restraint
system installation ................ 67
Cleaning................................ 382
Folding down the rear
seatbacks ........................... 185
Head restraint ....................... 187
Properly sitting in the seat ...... 30
Seat heaters ......................... 364
RS