2023 TOYOTA COROLLA HYBRID service

821-4. Hybrid system
The illustration is an example for explanation and may differ from the actual
item.
Warning label
Service plug
Rear electric motor (traction motor)
*
Hybrid battery (traction battery)
High voltage cables (orange)
Front electric motor (traction motor)
Air conditioning compressor
Power control unit
*: AWD models only
■Running out of fuel
When the vehicle has run out of fuel
and the hybrid system cannot be
started, refuel th e vehicle with at least enough gasoline to make the
low fuel level warning light (
P.375)
go off. If there is only a small
amount of fuel, the hybrid system
may not be able to start. (The stan-
dard amount of fuel is about 2.0 gal.
[7.6 L, 1.7 I mp. gal.] (2WD models)
Hybrid system precautions
Take care when handling the hybrid system, as it is a high
voltage system (about 600 V at maximum) as well as contains
parts that become extremely hot when the hybrid system is
operating. Obey the warning labels attached to the vehicle.
System components

831-4. Hybrid system
1
For safety and security
or 1.6 gal. [6.0 L, 1.3 Imp. gal.]
(AWD models) when the vehicle is
on a level surface. This value may
vary when the vehicle is on a slope.
Add extra fuel when the vehicle is
inclined.)
■Electromagnetic waves
●High voltage parts and cables on
hybrid vehicles incorporate elec-
tromagnetic shielding, and there-
fore emit approximately the same
amount of electromagnetic waves
as conventional gasoline pow-
ered vehicles or home electronic
appliances.
●Your vehicle may cause sound
interference in some third
party-produced radio parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery)
has a limited service life. The lifes-
pan of the hybrid battery (traction
battery) can change in accordance
with driving style and driving condi-
tions.
■Starting the hybrid system in an
extremely cold environment
When the hybrid battery (traction
battery) is extremely cold (below
approximately -22°F [-30°C]) under
the influence of t he outside tem-
perature, it may no t be possible to
start the hybrid system. In this case,
try to start the hybrid system again
after the temperature of the hybrid
battery increases due to the outside
temperature increasing, etc.
WARNING
■High voltage precautions
This vehicle has high voltage DC
and AC systems as well as a
12-volt system. DC and AC high
voltage is very dangerous and
can cause severe burns and elec-
tric shock that may result in death
or serious injury.
●Never touch, disassemble,
remove or replace the high volt-
age parts, cables or their con-
nectors.
●The hybrid system will become
hot after starting as the system
uses high voltage. Be careful of
both the high voltage and the
high temperature, and always
obey the warning labels
attached to the vehicle.
●Never try to open the service
plug access hole located under
the right side o f the rear seat.
The service plug is used only
when the vehicle is serviced
and is subject to high voltage.
■Road accident cautions
Observe the following precautions
to reduce the risk of death or seri-
ous injury:
●Pull your vehicle off the road,
apply the parking brake, shift
the shift lever to P, and turn the
hybrid system off.
●Do not touch the high voltage
parts, cables and connectors.
●If electric wires are exposed
inside or outside your vehicle,
an electric shock may occur.
Never touch exposed electric
wires.

1994-5. Using the driving support systems
4
Driving
4-5.Using the driving support systems
*: If equipped
This Owner's Manual contains
information for Ver. 1. For the
latest information about the con-
trols, use, warnings/precautions,
etc. of each function of Toyota
Safety Sense, refer to the Digital
Owner's Manual at the Owner's
Manual website.
If the software of this system
has been updated after initial purchase of the vehicle, before
using this system, be sure to
read the Owner's Manual which
corresponds to the software ver-
sion of the system.
■Precautions for use
●Be aware that some functions
may temporarily be disabled if a
legal or safety related issue
occurs.
●If a connected services contract
has not been entered or has
expired, software updates will not
be able to be performed wire-
lessly.
If the software of this system
has been updated after initial
purchase of the vehicle, to
access the appropriate Owner’s
Manual, it is necessary to check
the software version of the sys-
tem and then visit the Owner's
Manual website.
The software version of the sys-
tem can be checked using One-
App.
Toyota Safety Sense
3.0 software update
*
It is necessary to enter a
connected services con-
tract, provided by Toyota, to
use these functions. For
details, contact your Toyota
dealer.
WARNING
■For safe use
When the Toyota Safety Sense
3.0 software is updated, the oper-
ating methods of functions may
change. Using this system without
knowing the correct operating
methods may lead to an accident
resulting in death or serious injury.
●Make sure to read the Digital
Owner's Manual which corre-
sponds to the software version
of the system, available at the
Owner's Manual website, before
using this system.
Content of the Toyota
Safety Sense Owner's
Manual
Checking your vehicle’s
Toyota Safety Sense ver-
sion
Checking the version
using OneApp

2734-6. Driving tips
4
Driving
Use fluids that are appropriate
to the prevailing outside tem-
peratures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
Have a service technician
inspect the condition of the
12-volt battery.
 Have the vehicle fitted with
four snow tires or purchase a
set of tire chains for the front
tires.
Ensure that all tires are the same
size and brand, and that chains
match the size of the tires.
Winter driving tips
Carry out the necessary
preparations and inspec-
tions before driving the
vehicle in winter. Always
drive the vehicle in a man-
ner appropriate to the pre-
vailing weather conditions.
Pre-winter preparations
WARNING
■Driving with snow tires
Observe the following precautions
to reduce the risk of accidents.
Failure to do so m ay result in a
loss of vehicle control and cause
death or serious injury.
●Use tires of the size specified.
●Maintain the recommended
level of air pressure.
●Do not drive in excess of 75
mph (120 km/h), regardless of
the type of snow tires being
used.
●Use snow tires on all, not just
some wheels.
■Driving with tire chains
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in the
vehicle being unable to be driven
safely, and may cause death or
serious injury.
●Do not drive in excess of the
speed limit specifi ed for the tire
chains being used, or 30 mph
(50 km/h), whichever is lower.
●Avoid driving on bumpy road
surfaces or over potholes.
●Avoid sudden acceleration,
abrupt steering, sudden brak-
ing and shifting operations that
cause sudden engine braking.
●Slow down sufficiently before
entering a curve to ensure that
vehicle control is maintained.
●Do not use LTA (Lane Tracing
Assist) system.
●Do not use LDA (Lane Depar-
ture Alert) system.
NOTICE
■Repairing or replacing snow
tires
Request repairs or replacement of
snow tires from Toyota dealers or
legitimate tire retailers.
This is because the removal and
attachment of snow tires affects
the operation of the tire pressure
warning valves and transmitters.

2815-1. Using the air conditioning system and defogger
5
Interior features
the temperature setting or the
inside temperature.
■Eco air conditioning mode
When Eco drive mode is selected
using the driving mode select
switch, eco air conditioning mode
turns on.
When a drive mode other than Eco
drive mode is sele cted, eco air con-
ditioning mode may turn off.
■Operation of the air condition-
ing system in Eco drive mode
●In Eco drive mode, the air condi-
tioning system is controlled as fol-
lows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict
heating/cooling capacity
• Fan speed restr icted when auto-
matic mode is selected
●To improve air co nditioning perfor-
mance, perform the following
operations:
• Turn off eco air conditioning mode ( P.280)
• Adjust the fan speed
• Turn off Eco drive mode ( P.264)
■When the outside temperature
falls to nearly 32°F (0°C)
The dehumidification function may
not operate even when “A/C” switch
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.346
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the e ngine compart-
ment at the locati on shown in the
following illustration.
●The meaning of each symbol on
the label are as follows:
Caution
Air conditioning sys-
tem
Air conditioning sys-
tem lubricant type
Requires registered
technician to service
air conditioning sys-
tem
Flammable refrigerant

301
6
6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 302
Cleaning and protecting the vehicle interior ........... 305
6-2. Maintenance Maintenance requirements.................................. 308
General maintenance.. 310
Emission inspection and maintenance (I/M) pro-
grams ........................ 312
6-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 314
Hood ........................... 316
Positioning a floor jack .................................. 317
Engine compartment ... 318
Tires ............................ 325
Tire inflation pressure.. 342
Wheels ......... ...............344
Air conditioning filter .... 346
Cleaning the hybrid battery (traction battery) air intake
vents.......................... 347
Wireless remote con- trol/electronic key battery.................................. 350
Checking and replacing fuses.......................... 354Light bulbs ...................
356

3106-2. Maintenance
General maintenance
Listed below are the general
maintenance items that
should be performed at the
intervals specified in the
“Owner’s Warranty Informa-
tion Booklet” or “Owner’s
Manual Supplement/Sched-
uled Maintenance Guide”. It
is recommended that any
problem you notice should
be brought to the attention
of your Toyota dealer or
qualified service shop for
advice.
WARNING
■If the hybrid system is operat-
ing
Turn the hybrid system off and
ensure that there is adequate
ventilation before performing
maintenance checks.
Engine compartment
ItemsCheck points
12-volt batteryCheck the connec-
tions. ( P.323)
Brake fluid
Is the brake fluid at
the correct level?
( P.322)
Engine/power
control unit
coolant
Is the
engine/power con-
trol unit coolant at
the correct level?
( P.320)
Engine oil
Is the engine oil at
the correct level?
( P.318)
Exhaust sys-
temThere should not
be any fumes or
strange sounds.
Radiator/con-
denser
The radiator and
condenser should
be free from for-
eign objects.
( P.321)
Washer fluid
Is there sufficient
washer fluid?
( P.324)
Vehicle interior
ItemsCheck points
Accelerator
pedal
The accelerator
pedal should move
smoothly (without
uneven pedal effort
or catching).
Brake pedal
• Does the brake
pedal move
smoothly?
• Does the brake pedal have
appropriate
clearance from
the floor?
( P.425)
• Does the brake pedal have the
correct amount
of free play?
( P.425)
ItemsCheck points

3126-2. Maintenance
The OBD system determines
that a problem exists some-
where in the emission control
system. Your vehicle may not
pass the I/M test and may need
to be repaired. Contact your
Toyota dealer to service the
vehicle.
When the 12-volt battery is
disconnected or discharged
Readiness codes that are set
during ordinary driving are erased.
Also, depending on your driving
habits, the readiness codes may
not be completely set.
When the fuel tank cap is
loose
Tires
• Is the tire infla-
tion pressure
correct?
• The tires should not be damaged
or excessively
worn.
• Have the tires been rotated
according to the
maintenance
schedule?
• The wheel nuts should not be
loose.
Windshield
wipers
• The wiper blades should not show
any signs of
cracking, split-
ting, wear, con-
tamination or
deformation.
• The wiper blades should clear the
windshield with-
out streaking or
skipping.
ItemsCheck pointsEmission inspection
and maintenance (I/M)
programs
Some states have vehicle
emission inspection pro-
grams which include OBD
(On Board Diagnostics)
checks. The OBD system
monitors the operation of
the emission control sys-
tem.
If the malfunction indica-
tor lamp comes on
Your vehicle may not pass
the I/M test in the follow-
ing situations: