2023 TOYOTA GR YARIS radiator cap

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6-4. Do-it-yourself maintenance
Maintenance and care
Washer fluid tank (P.272)
Engine coolant reservoir ( P. 2 7 1 )
Engine oil filler cap ( P.270)
Engine oil level dipstick ( P.270)
Fuse boxes ( P.295)
Radiator ( P.272)
Condenser ( P.272)
Electric cooling fan
Intercooler
■Battery
 P. 2 7 3
With the engine at operating tem-
Engine compartment
Components
Checking and adding the
engine oil

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6-4. Do-it-yourself maintenance
ant” 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% deion-ized water. (Minimum temperature: -
35°C [-31°F])
For more details about coolant, contact any authorized Toyota retailer or Toyota
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 caps, drain cock and water pump.
If you cannot find a leak, have any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer, test the cap and check for leaks in the cooling system.
Check the radiator, condenser and
intercooler 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.
If the washer fluid level is at “1/2”,
add washer fluid.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir 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 mix-ture 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.
Checking the radiator, con-
denser and intercooler
WARNING
■When the engine is hot
Do not touch the radiator, condenser
or intercooler as they may be hot and cause serious injuries, such as burns.
Adding the washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains alcohol and may catch
fire if spilled on the engine, etc.

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7-2. Steps to take in an emergency
When trouble arises
engine coolant is unavailable.
6Start 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 condition-
ing 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 temperatures.)
7 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 (espe-cially 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 coolant reservoir caps 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 additive.

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Alphabetical Index
P
Parking assist sensors (Toyota park-
ing assist-sensor) ...................... 204
Parking brake ................................ 141
Operation ................................... 141
Parking brake engaged warning
buzzer ...................................... 141
Parking lights
Light switch ................................ 142
PCS (Pre-Collision System) ......... 158
Enabling/disabling the pre-collision
system ..................................... 162
Function ..................................... 158
Warning light .............................. 319
Personal lights .............................. 235
Power outlet .................................. 242
Power steering (Electric power
steering system)......................... 218
Warning light .............................. 315
Power windows
Door lock linked window operation
................................................. 123
Jam protection function .............. 122
Operation ................................... 122
Window lock switch .................... 124
Pre-Collision System (PCS) ......... 158
Enabling/disabling the pre-collision
system ..................................... 162
Function ..................................... 158
Warning light .............................. 319
R
Radar cruise control ..................... 179
Radiator ......................................... 272
RCTA (Rear Crossing Traffic Alert)
..................................................... 210
Enabling/disabling the Rear Cross-
ing Traffic Alert ......................... 211
Warning lights.............................318
Rear Crossing Traffic Alert (RCTA)
..................................................... 210
Enabling/disabling the Rear Cross-
ing Traffic Alert ......................... 211
Warning lights.............................318
Rear fog lights
Switch......................................... 148
Rear seats...................................... 114
Head restraints ........................... 115
Rear turn signal lights ..................140
Replacing light bulbs ..................299
Turn signal lever ......................... 140
Rear view mirror
Inside rear view mirror................ 119
Outside rear view mirrors ........... 120
Rear window defogger ................. 230
Refueling ....................................... 151
Capacity ..................................... 350
Fuel types...................................350
Opening the fuel tank cap .......... 151
Replacing
Electronic key battery ................. 293
Fuses ......................................... 295
Light bulbs .................................. 299
Tire ............................................. 285
Road Sign Assist .......................... 190
RSA (Road Sign Assist) ............... 190