radiator cap TOYOTA COROLLA HYBRID 2021 Owners Manual (in English)

4347-3. Do-it-yourself maintenance
COROLLA HV_U
Washer fluid tank ( P.440)
Engine coolant reservoir ( P.436)
Fuse boxes ( P.461)
Engine oil level dipstick ( P.435)
Engine oil filler cap ( P.435)
Power control unit coolant reservoir ( P.436)
Brake fluid reservoir ( P.438)
12-volt battery ( P.439)
Radiator ( P.437)
Condenser ( P.437)
Electric cooling fans
With the engine at operating temperature and turned off,
check the oil level on the dip-
stick.
Engine compar tment
Components
Checking and adding the
engine oil

4377-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
Reservoir cap
“FULL” line
“LOW” line
I f t he le ve l is on o r be low th e “L O W ”
line, add coolant up to the “FULL”
line. ( P.517)
■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.
U.S.A.:
“Toyota Super Long Life Coolant” is
a mixture of 50% coolant and 50%
deionized water. (Minimum tem-
perature: -31°F [-35°C])
Canada:
“Toyota Super Long Life Coolant” is
a mixture of 55% coolant and 45%
deionized water. (Minimum tem-
perature: -44°F [-42°C])
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the radiator, hoses,
engine/power control unit coolant
reservoir caps, drain cock and water
pump.
If you cannot find a leak, have your
Toyota dealer test the cap and
check for leaks in the cooling sys-
tem.
Check the radiator and con-
denser and clear away any for-
eign objects. If either of the
above parts is extremely dirty or
you are not sure of their condi-
tion, have your vehicle
inspected by your Toyota dealer.
WA R N I N G
■When the hybrid system is
hot
Do not remove the engine/power
control unit coolant reservoir
caps.
The cooling system may be under
pressure and may spray hot cool-
ant 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
B e s ur e to wa sh it o ff with w at er to
prevent it from damaging parts or
paint.
Checking the radiator and
condenser
WA R N I N G
■When the hybrid system is
hot
Do not touch the radiator or con-
denser as they may be hot and
cause serious injuries, such as
burns.

5208-2. Steps to take in an emergency
COROLLA HV_U
1Stop the hybrid system. Set
the parking brake and shift
the shift lever to P.
2 Remove the mud, snow or
sand from around the front
wheels.
3 Place wood, stones or some
other material under the front
wheels to help provide trac-
tion.
4 Restart the hybrid system.
5 Shift the shift lever to D or R
and release the parking
brake. Then, while exercising
caution, depress the acceler-
ator pedal.
■When it is difficult to free the
vehicle
Press the switch to turn off
TRAC.
WA R N I N G
●After the hybrid system has
been turned off, check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline en gine may auto-
matically start, o r the cooling
fans may suddenly operate
even if the gasoline engine
stops. Do not touch or approach
rotating parts such as the fan,
which may lead to fingers or
clothing (especially a tie, a scarf
or a muffler) getting caught,
resulting in serious injury.
●Do not loosen the coolant reser-
voir caps while the hybrid sys-
tem and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding engine/power
control 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 damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust etc.).
●Do not use any coolant additive.
If the vehicle becomes
stuck
Carry out the following pro-
cedures if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:
Recovering procedure

575Alphabetical Index
COROLLA HV_U
Personal lights ....................... 395 Wattage ................................ 530
Phone ...................................... 343 About the contacts in the contact list ....................................... 347
Phone screen operation ....... 343
Registering/Conn ecting a Blue-
tooth
® phone ...................... 345
Some basics......................... 344
Troubleshooting.................... 368
Voice command system ....... 347
When selling or disposing of the vehicle ................................ 347
Phone button .......................... 343
Phone button (Menu screen) . 255
Phone button (Setup screen) 258
Phone settings ....................... 358 Contacts/Call history settings360
Message settings ................. 366
Notifications settings ............ 359
Sounds settings.................... 358
Placing a call u sing the Blue-
tooth
® hands-free system ... 348
By call history ....................... 348
By contacts list ..................... 349
By favorites list ..................... 348
By home screen ................... 350
By keypad ............................ 350
Power control unit .................... 83
Power control unit coolant Capacity ............................... 527
Checking .............................. 436
Preparing and c hecking before
winter.................................. 247
Power outlet ............................ 402
Power steering (Electric power steering system)................... 240Warning light ........................ 481
Power switch .......................... 157 Auto power off function ........ 160
Changing the power switch modes ................................ 160 Power switch (engine switch)
If your vehicle has to be stopped in an emergency .................471
POWER VOLUME knob ..........299
Power windows Door lock linked window opera-tion......................................143
Jam protection function ........142
Operation..............................142
Window lock switch ..............144
Pre-Collision System (PCS) Function................................189
Warning light.........................483
R
Radar cruise control (dynamic radar cruise control with
full-speed range)...................207
Radiator ...................................437
Radio........................................303 Displaying the radi o ID .........306
How to subscribe to SiriusXM Radio Services ...................305
Presetting a station ...............303
Radio broadcast data system304
Refer to the tabl e below to iden-
tify the problem and take the
suggested corrective action 306
RCTA Function................................226
Warning message.................227
RCTA function .........................228
Rear Cross Traffic Alert (RCTA) ...............................................226
Rear seats ...............................134 Head restraints .....................136
Rear side marker lights Light switch...........................173
Replacing light bulbs ....464, 465
Wattage ................................530
Rear turn signal lights Replacing light bulbs ............465