air filter TOYOTA COROLLA HYBRID 2021 Owners Manual (in English)

4TABLE OF CONTENTS
COROLLA HV_U
Command list .....................337
5-12. Mobile Assistant operation Mobile Assistant ................. 341
5-13. Phone operation (Hands-free system for cellular phones)
Quick reference .................. 343
Some basics ...................... 344
Placing a call using the Blue-
tooth
® hands-free system 348
Receiving a call using the Blue-
tooth
® hands-free system 351
Talking on the Bluetooth
®
hands-free system ........... 352
Bluetooth
® phone message
function ............................ 354
5-14. Phone settings Setup .................................. 358
5-15. What to do if... (Bluetooth
®)
Troubleshooting ................. 368
5-16. Connected Services Overview Functional overview ........... 372
Type A: Function achieved by using a smart phone or DCM......................................... 373
Type B: Function achieved by using DCM and the system
......................................... 376
Type C: Function achieved by using DCM ....................... 377
Type D: Function achieved by using DCM and a smartphone
......................................... 377
5-17. Connected Services Opera- tion
Toyota apps ........................ 379
5-18. Toyota apps settings Setup .................................. 3836-1. Using the air conditioning
system and defogger
Automatic air conditioning sys-tem ................................... 386
Heated steering wheel/seat heaters ............................. 393
6-2. Using the interior lights Interior lights list ................. 395
6-3. Using the storage features List of storage features ...... 397
Trunk features .................... 400
6-4. Other interior features Other interior features ........ 401
Garage door opener........... 411
7-1. Maintenance and care Cleaning and protecting the vehicle exterior................. 420
Cleaning and protecting the vehicle interior.................. 422
7-2. Maintenance Maintenance requirements......................................... 425
General maintenance......... 426
Emission inspection and mainte- nance (I/M) programs ...... 429
7-3. Do-it-yourself maintenance Do-it-yourself service precau-tions ................................. 430
Hood .................................. 432
Positioning a floor jack ....... 433
Engine compartment .......... 434
Tires ................................... 441
Tire inflation pressure......... 450
Wheels ............................... 452
Air conditioning filter........... 454
6Interior features
7Maintenance and care

5TABLE OF CONTENTS
COROLLA HV_U
1
2
3
4
5
6
7
8
9
10
Cleaning the hybrid battery (trac- tion battery) air intake vent and
filter .................................. 455
Electronic key battery ......... 459
Checking and replacing fuses ......................................... 461
Light bulbs .......................... 463
8-1. Essential information Emergency flashers ........... 470
If your vehicle has to be stopped in an emergency .............. 471
If the vehicle is trapped in rising water ................................ 472
8-2. Steps to take in an emergency If your vehicle needs to be towed......................................... 473
If you think something is wrong ......................................... 476
If a warning light turns on or a warning buzzer sounds .... 478
If a warning message is dis- played .............................. 487
If you have a flat tire (vehicles without spare tire) ............ 490
If you have a flat tire (vehicles with a spare tire) .............. 501
If the hybrid system will not start ......................................... 509
If you lose your keys .......... 510
If the fuel filler door cannot be opened ............................. 511
If the electronic key does not operate properly ............... 511
If the 12-volt battery is dis- charged ............................ 513
If your vehicle overheats .... 517
If the vehicle becomes stuck ......................................... 5209-1. Specifications
Maintenance data (fuel, oil level, etc.) .................................. 524
Fuel information ................. 531
Tire information .................. 533
9-2. Customization Customizable features ....... 544
9-3. Initialization Items to initialize ................ 552
10-1. For owners Reporting safety defects for U.S. owners ............................. 554
Seat belt instructions for Cana- dian owners (in French) ... 554
SRS airbag instructions for Canadian owners (in French)......................................... 556
What to do if... (Troubleshooting) ......................................... 564
Alphabetical Index.............. 567
8When trouble arises
9Vehicle specifications
10For owners
Index

871-4. Hybrid system
COROLLA HV_U
1
For safety and security
When a certain level of impact is
detected by the impact sensor,
the emergency shut off system
blocks the high voltage current
and stops the fuel pump to mini-
mize the risk of electrocution
and fuel leakage. If the emer-
gency shut off system activates,
your vehicle will not restart. To
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction
occurs in the hybrid system or
an improper operation is
attempted.
If a warning message is shown
on the multi-information display,
read the message and follow the
instructions.
■If a warning light comes on, a
warning message is displayed,
or the 12-volt battery is discon-
nected
The hybrid system may not start. In
this case, try to start the system
again. If the “READY” indicator does
not come on, contact your Toyota
dealer.
NOTICE
●A filter is installed to the air
intake vent. Wh en the filter
remains noticeably dirty even
after cleaning the air intake
vent, filter cleaning or replace-
ment is recommended. Refer to
P.455 for details on how to clean
the filters.
Emergency shut off sys-
tem
Hybrid warning message

3896-1. Using the air conditioning system and defogger
COROLLA HV_U
6
Interior features
is pressed.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condi-
tioning system to the outside air
mode.
●During use, various odors from
inside and outside the vehicle may
enter into and a ccumulate in the
air conditioning system. This may
then cause odor to be emitted
from the vents.
●To reduce potential odors from
occurring:
• It is recommended that the air conditioning system be set to out-
side air mode prior to turning the
vehicle off.
• The start timing of the blower may
be delayed for a short period of
time immediately after the air con-
ditioning system is started in auto-
matic mode.
●When parking, the system auto-
matically switches to outside air
mode to encourage better air cir-
culation throughout the vehicle,
helping to reduce odors that occur
when starting the vehicle.
■Air conditioning filter
 P. 4 5 4
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the ho od at the loca-
tion shown in the f ollowing illustra-
tion.
●The meaning of each symbol on
the label are as follows:
■Customization
Some functions can be customized.
(  P.544)
Caution
Air conditioning sys-
tem
Air conditioning sys-
tem lubricant type
Requires registered
technician to service
air conditioning sys-
tem
Flammable refrigerant
WA R N I N G
■To prevent the windshield
from fogging up
Do not use the windshield defog-
ger switch during cool air opera-
tion in extremely humid weather.
The difference between the tem-
perature of the outside air and
that of the windshield can cause
the outer surface of the wind-
shield to fog up, blocking your
vision.
■When the outside rear view
mirror defoggers are operat-
ing
D o n o t t o u c h t h e o u t s i d e r e a r v i e w
mirror surfaces, as they can
become very hot and burn you.
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the air conditioning
system on longer than necessary
when the hybrid system is off.

419
COROLLA HV_U
7
7
Maintenance and care
Maintenance and care
.7-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 420
Cleaning and protecting the vehicle interior ........... 422
7-2. Maintenance Maintenance requirements.................................. 425
General maintenance.. 426
Emission inspection and maintenance (I/M) pro-
grams ........................ 429
7-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 430
Hood ........................... 432
Positioning a floor jack .................................. 433
Engine compartment ... 434
Tires ............................ 441
Tire inflation pressure.. 450
Wheels ......... ...............452
Air conditioning filter .... 454
Cleaning the hybrid battery (traction battery) air intake
vent and filter............. 455
Electronic key battery.. 459
Checking and replacing fuses.......................... 461
Light bulbs................... 463

4317-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
Light bulbs
(  P.463)
• Bulb with same
number and wattage
rating as original
• Flathead screw- driver
•Wrench
Radiator
and con-
denser
(  P.437)

Tire infla-
tion pres-
sure
( P.450)• Tire pressure gauge
• Compressed air
source
Washer
fluid
( P.440)
• Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for adding water or
washer fluid)
WA R N I N G
The engine compartment contains
many mechanisms and fluids that
may move suddenly, become hot,
or become electrically energized.
To avoid death or serious injury,
observe the following precautions.
■When working on the engine
compartment
●Make sure that the “ACCES-
SORY” or “IGNITION ON” on
the multi-inform ation display
and the “READY” indicator are
both off.
●Keep hands, clothing and tools
away from the moving fans.
ItemsParts and tools●Be careful not to touch the
engine, power control unit, radi-
ator, exhaust manifold, etc. right
after driving as they may be hot.
Oil and other fluids may also be
hot.
●Do not leave anything that may
burn easily, such as paper and
rags, in the engine compart-
ment.
●Do not smoke, c ause sparks or
expose an open flame to fuel or
the 12-volt battery. Fuel and
12-volt battery fumes are flam-
mable.
●Be extremely cautious when
working on the 12-volt battery. It
contains poisonous and corro-
sive sulfuric acid.
■When working near the elec-
tric cooling fans or radiator
grille
Be sure the power switch is OFF.
With the power switch in ON, the
electric cooling fans may auto-
matically start to r un if the air con-
ditioning is on an d/or the coolant
temperature is high. ( P.437)
■Safety glasses
Wear safety glasses to prevent
flying or falling material, fluid
spray, etc. from getting in your
eyes.
NOTICE
■If you remove the air cleaner
filter
Driving with the ai r cleaner filter
removed may cause excessive
engine wear due to dirt in the air.

4547-3. Do-it-yourself maintenance
COROLLA HV_U
1Turn the power switch off.
2 Open the glove box. Slide off
the damper.
3 Push in the glove box on the
vehicle’s outer side to discon-
nect the claws. Then pull out
the glove box and disconnect
the lower claws.
4 Unlock the filter cover ( ),
pull the filter cover out of the claws ( ), and remove the
filter cover.
5 Remove the filter case.
6 Remove the air conditioning
filter from the filter case and
replace it with a new one.
The “ UP” marks shown on the
filter and the filter case should be
pointing up.
■Checking interval
Replace the air conditioning filter
according to the maintenance
schedule. In dusty areas or areas
with heavy traffic fl ow, early replace-
Air conditioning filter
The air conditioning filter
must be changed regularly
to maintain air conditioning
efficiency.
Removing the air condi-
tioning filter

4557-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
ment may be required. (For sched-
uled maintenance information,
please refer to the “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement”.)
■If air flow from the vents
decreases dramatically
The filter may be clogged. Check
the filter and replace if necessary.
Remove the dust from the air
intake vent with a vacuum
cleaner, etc.
Make sure to only use a vacuum to
suck out dust and clogs. Attempting
to blow out dust and clogs using an
airgun, etc. may pus h it into the air
intake vent. ( P.458)
NOTICE
■When using the air condition-
ing system
Make sure that a filter is always
installed.
Using the air conditioning system
without a filter may cause damage
to the system.
■To prevent damage to the fil-
ter cover
When moving the filter cover in
the direction of arrow to release
the fitting, pay attention not to
apply excessive force to the
claws. Otherwise, the claws may
be damaged.
Cleaning the hybrid
batter y (traction bat-
ter y) air intake vent
and filter
To prevent the fuel economy
from being affected, visually
inspect the hybrid battery
(traction battery) air intake
vent periodically for dust
and clogs. If it is dusty or
clogged or if “Maintenance
Required for Traction Bat-
tery Cooling Parts See
Owner’s Manual” is dis-
played on the multi-informa-
tion display, clean the air
intake vent using the follow-
ing procedures:
Cleaning the air intake
vent

4567-3. Do-it-yourself maintenance
COROLLA HV_U
If dust and clogs cannot be com-
pletely removed with the air
intake vent cover installed,
remove the cover and clean the
filter.
1Turn the power switch off.
2 Using a Phillips screwdriver,
remove the clip.
3 Remove the air intake vent
cover.
Pull the cover as shown in
the illustration to disengage
the 3 claws, starting from the
claw in the upper right corner.
Pull the cover toward the
front of the vehicle to remove
it. 4
Remove the air intake vent
filter.
Disengage the claw as
shown in the illustration.
Remove the filter from the
cover.
5 Remove the dust and clogs
from the filter using a vacuum
cleaner, etc.
Make sure to also remove the dust
and clogs from the inside of the air
intake vent cover.
6 Reinstall the filter to the
cover.
If dust and clogs cannot
be completely removed

4577-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
Engage the filter to the 2
claws as shown in the illus-
tration.
Engage the claw to install the
filter.
Make sure that t he filter is not
crooked or deformed when install-
ing it.
7 Install the air intake vent
cover.
Insert the tab of the cover as
shown in the illustration.
Push the cover to engage the
3 claws.
8 Using a Phillips screwdriver,
install the clip.
■Scheduled maintenance of the
air intake vent is necessary
when
In some situations such as when the
vehicle is used frequently or in
heavy traffic or dusty areas, the air intake vent may need to be cleaned
more regularly. For d
etails, refer to
“Scheduled Maintenance Guide” or
“Owner’s Manual Supplement”.
■Cleaning the air intake vent
●Dust in the air intake vent may
interfere with the cooling of the
hybrid battery (trac tion battery). If
charging/discharging of the hybrid
battery (traction battery) becomes
limited, the distance that the vehi-
cle can be driven using the electric
motor (traction motor) may be
reduced and the fuel economy
may be reduced.
Inspect and clean the air intake
vent periodically.
●Improper handling of the air intake
vent cover and filt er may result in
damage to them. If you have any
concerns about cleaning the filter,
contact your Toyota dealer.
■If “Maintenance Required for
Traction Battery Cooling Parts
See Owner’s Manual” is dis-
played on the multi-information
display
●If this warning message is dis-
played on the multi-information
display, remove the air intake vent
cover and clean the filter.
(  P.456)
●After cleaning the air intake vent,
start the hybrid system and check
that the warning message is no
longer displayed.
After the hybrid system is started,
it may be necessary to drive the
vehicle up to approximately 20
minutes before the warning mes-
sage disappears. If the warning
message does not disappear after
driving for appropriately 20 min-
utes, have the vehicle inspected
by your Toyota dealer.