2023 TOYOTA YARIS CROSS radiator cap

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6-3. Do-it-yourself maintenance
Maintenance and care
Washer fluid tank (P.387)
Fuse boxes ( P.413)
Power control unit coolant reservoir ( P.385)
Engine oil filler cap ( P.384)
Engine oil level dipstick ( P.384)
Engine coolant reservoir ( P. 3 8 5 )
Radiator ( P.387)
Condenser ( P.387)
Electric cooling fan
■12-volt battery
 P. 3 8 8
With the engine at operating tem-
Engine compartment
Components
Checking and adding the
engine oil

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6-3. Do-it-yourself maintenance
the reservoir when the engine is
cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line. ( P.477)
■Power control unit coolant
reservoir
The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir when the hybrid sys-
tem is cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line. ( P.477)
■Coolant selection
Only use “Toyota Super Long Life Cool-
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/power control unit coolant reser-
voir 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.
WARNING
■When the hybrid system is hot
Do not remove the engine/power con-
trol unit coolant reservoir caps. ( P.479)
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.

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7-2. Steps to take in an emergency
When trouble arises
“F” line
“L” line
5 Add coolant if necessary.
If water was added in an emergency, have the vehicle inspected at any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer as soon as possible.
6 After stopping the hybrid system
and waiting for 5 minutes or
more, start the hybrid system
again and check for the multi-
information display.
If the message does not disap-
pear: Stop the hybrid system
and contact any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
If the message is not displayed:
The hybrid system temperature
has dropped and the vehicle
may be driven normally.
However, if the message appears again
frequently, contact 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.
●After the hybrid system has been turned off, check that the “READY”
indicator is off. When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fan may suddenly oper- ate even if the gasoline engine stops. Do not touch or approach
rotating parts such as the fan, which may lead to fingers or cloth-ing (especially a tie, a scarf or a
muffler) getting caught, resulting in serious injury.
●Do not loosen the coolant reservoir caps while the hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power con-trol unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding cool coolant to a hot hybrid
system too quickly can cause dam- age to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or
dust etc.).

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Alphabetical Index
Parking Support Brake function
(static objects) ......................... 296
Warning lights ............................ 441
Warning message ...................... 295
Power back door opener switch . 143
Power control unit .......................... 79
Power control unit coolant .......... 385
Capacity ..................................... 488
Checking .................................... 385
Preparing and checking before win-
ter ............................................ 337
Power mode .................................. 322
Power outlet .................................. 359
Power steering (Electric power
steering system)......................... 329
Warning light .............................. 438
Power switch ........................ 189, 191
Auto power off function .............. 194
Changing the power switch modes
......................................... 190, 193
Power switch (engine switch)
If your vehicle has to be stopped in
an emergency .......................... 426
Power windows
Door lock linked window operation
................................................. 170
Jam protection function .............. 169
Operation ................................... 169
Window lock switch .................... 171
Pre-Collision System (PCS) ......... 231
Enabling/disabling the pre-collision
system ..................................... 235
Function ..................................... 231
Warning light .............................. 441
R
Radar cruise control (dynamic radar
cruise control with full-speed
range) .......................................... 252
Radiator ......................................... 387
RCTA (Rear Cross Traffic Alert)
Enabling/disabling the Rear Cross
Traffic Alert ............................... 286
RCTA (Rear Crossing Traffic Alert)
..................................................... 285
Warning lights.............................440
Rear Cross Traffic Alert (RCTA)
Enabling/disabling the Rear Cross
Traffic Alert ............................... 286
Rear Crossing Traffic Alert (RCTA)
..................................................... 285
Warning lights.............................440
Rear fog lights
Switch......................................... 218
Rear seats...................................... 158
Head restraints ........................... 160
Seat heaters ............................... 348
Rear turn signal lights ..................200
Replacing light bulbs ..........418, 419
Turn signal lever ......................... 200
Wattage ...................................... 492
Rear view mirror
Inside rear view mirror................ 165
Outside rear view mirrors ........... 166
Rear window defogger ................. 344
Rear window wiper .......................222
Refueling ....................................... 224
Capacity ..................................... 486
Fuel types...................................486
Opening the fuel tank cap .......... 224