check engine TOYOTA COROLLA HYBRID 2020 (in English) User Guide

2274-6. Driving tips
COROLLA HV_U
4
Driving
When driving in a traffic jam,
gently release the brake pedal
to allow the vehicle to move for-
ward slightly while avoiding
overuse of the accelerator
pedal. Doing so can help control
excessive gasoline consump-
tion.
Control and maintain the vehicle
at a constant speed. Before
stopping at a toll booth or simi-
lar, allow plenty of time to
release the accelerator and gen-
tly apply the brakes. A greater
amount of electrical energy can
be regenerated when slowing
down.
Use the air conditioning only
when necessary. Doing so can
help reduce excessive gasoline
consumption.
In summer: When the ambient
temperature is high, use the
recirculated air mode. Doing so
will help to reduce the burden on
the air conditioning system and
reduce fuel consumption as
well.
In winter: Because the gasoline
engine will not automatically cut
out until it and the interior of the
vehicle are warm, it will con-
sume fuel. Also, fuel consump-
tion can be improved by avoiding overuse of the heater.
Make sure to check the tire infla-
tion pressure frequently.
Improper tire inflation pressure
can cause poor fuel economy.
Also, as snow tires can cause
large amounts of friction, their
use on dry roads can lead to
poor fuel economy. Use tires
that are appropriate for the sea-
son.
Carrying heavy luggage will lead
to poor fuel economy. Avoid car-
rying unnecessary luggage.
Installing a large roof rack will
also cause poor fuel economy.
Since the gasoline engine starts
up and cuts out automatically
when cold, warming up the
engine is unnecessary. More-
over, frequently driving short
distances will cause the engine
to repeatedly warm up, which
can lead to excess fuel con-
sumption.
Highway driving
Air conditioning
Checking tire inflation
pressure
Luggage
Warming up before driv-
ing

391
COROLLA HV_U
7
7
Maintenance and care
Maintenance and care
.7-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 392
Cleaning and protecting the vehicle interior ........... 394
7-2. Maintenance Maintenance requirements.................................. 397
General maintenance.. 398
Emission inspection and maintenance (I/M) pro-
grams ........................ 401
7-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 402
Hood ........................... 404
Positioning a floor jack .................................. 405
Engine compartment ... 406
Tires ............................ 413
Tire inflation pressure.. 422
Wheels ......... ...............424
Air conditioning filter .... 426
Cleaning the hybrid battery (traction battery) air intake
vent and filter............. 427
Electronic key battery.. 431
Checking and replacing fuses.......................... 433
Light bulbs................... 435

3977-2. Maintenance
COROLLA HV_U
7
Maintenance and care
7-2.Maintenance
■Repair and replacement
It is recommended that genuine
Toyota parts be used for repairs to
ensure performanc e of each sys-
tem. If non-Toyota parts are used in
replacement or if a repair shop other
than a Toyota dealer performs
repairs, confirm the warranty cover-
age.
■Allow inspection and repairs to
be performed by a Toyota
dealer
●Toyota technicians are
well-trained specialists and are
kept up to date with the latest ser-
vice information. They are well
informed about the operation of all
systems on your vehicle.
●Keep a copy of the repair order. It
proves that the maintenance that
has been performed is under war-
ranty coverage. If any problem
should arise while your vehicle is
under warranty, your Toyota
dealer will promptly take care of it.
General maintenance should be
performed on a daily basis. This
can be done by yourself or by a
Toyota dealer.
Scheduled maintenance should
be performed at specified inter-
vals according to the mainte-
nance schedule.
For details about maintenance
items and schedules, refer to the
“Scheduled Maintenance Guide” or
“Owner’s Manual Supplement”.
Maintenance require-
ments
To ensure safe and econom-
ical driving, day-to-day care
and regular maintenance
are essential. It is the
owner’s responsibility to
perform regular checks.
Toyota recommends the
maintenance below.
WA R N I N G
■If your vehicle is not properly
maintained
Improper maintenance could
result in serious damage to the
vehicle and possible death or seri-
ous injury.
■Handling of the 12-volt bat-
tery
●Engine exhaust, some of its
constituents, and a wide variety
of automobile components con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects and
other reproductive harm. Work
in a well ventilated area.
●Oils, fuels and fluids contained
in vehicles as well as waste pro-
duced by component wear con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects or
other reproductive harm. Avoid
exposure and wash any
affected area immediately.
●12-volt battery posts, terminals
and related accessories con-
tain lead and lead compounds
which are known to cause brain
damage. Wash your hands after
handling. ( P.411)
General maintenance
Scheduled maintenance

3987-2. Maintenance
COROLLA HV_U
■Resetting the message indicat-
ing maintenance is required
After the required maintenance is
performed according to the mainte-
nance schedule, please reset the
message.
To reset the messa ge, follow the
procedure described below:
1 Press or of the meter
control switch to select .
2 Press or to select “Vehi-
cle Settings” and then press and
hold .
3 Press or to select
“Scheduled Maintenance” and
then press .
4 Press or to select “Yes”
and then press .
A message will be displayed on the
multi-information display when the
reset procedure has been com-
pleted.
You can perform some mainte-
nance procedures by yourself.
Please be aware that do-it-your-
self maintenance may affect
warranty coverage.
The use of Toyota repair manuals is
recommended.
For details about warranty cover-
age, refer to the separate “Owner’s
Warranty Information Booklet” or
“Owner’s Manual Supplement”.
Do-it-yourself mainte-
nance
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.
WA R N I N G
■If the hybrid sys tem 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.411)
Brake fluid
Is the brake fluid at
the correct level?
( P.410)
Engine/power
control unit
coolant
Is the
engine/power con-
trol unit coolant at
the correct level?
( P.408)

3997-2. Maintenance
COROLLA HV_U
7
Maintenance and care
Engine oil
Is the engine oil at
the correct level?
(  P.406)
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.409)
Washer fluid
Is there sufficient
washer fluid?
( P.412)
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.500)
• Does the brake pedal have the
correct amount
of free play?
( P.500)
ItemsCheck points
Brakes
• The vehicle
should not pull to
one side when
the brakes are
applied.
• The brakes should work
effectively.
• The brake pedal should not feel
spongy.
• The brake pedal should not get
too close to the
floor when the
brakes are
applied.
Head
restraints
Do the head
restraints move
smoothly and lock
securely?
Hybrid trans-
mission “Park”
mechanism
When parked on a
slope and the shift
lever is in P, is the
vehicle securely
stopped?
Indica-
tors/buzzersDo the indicators
and buzzers func-
tion properly?
LightsDo all the lights
come on?
Parking brake
• Does the park-ing brake oper-
ate normally?
• When parked on a slope and the
parking brake is
on, is the vehicle
securely
stopped?
ItemsCheck points

4007-2. Maintenance
COROLLA HV_U
Seat belts
• Do the seat belts operate
smoothly?
• The seat belts should not be
damaged.
Seats
Do the seat con-
trols operate prop-
erly?
Steering wheel
• Does the steer-ing wheel rotate
smoothly?
• Does the steer- ing wheel have
the correct
amount of free
play?
• There should not be any strange
sounds coming
from the steer-
ing wheel.
Vehicle exterior
ItemsCheck points
Doors/trunkDo the doors/trunk
operate smoothly?
Engine hood
Does the engine
hood lock system
work properly?
Fluid leaks
There should not
be any signs of
fluid leakage after
the vehicle has
been parked.
ItemsCheck points
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 points

4067-3. Do-it-yourself maintenance
COROLLA HV_U
Washer fluid tank ( P.412)
Engine coolant reservoir ( P.408)
Fuse boxes ( P.433)
Engine oil level dipstick ( P.407)
Engine oil filler cap ( P.407)
Power control unit coolant reservoir ( P.408)
Brake fluid reservoir ( P.410)
12-volt battery ( P.411)
Radiator ( P.409)
Condenser ( P.409)
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

4077-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
■Checking the engine oil
1 Park the vehicle on level
ground. After warming up the
engine and turning off the
hybrid system, wait more
than 5 minutes for the oil to
drain back into the bottom of
the engine.
2 Holding a rag under the end,
pull the dipstick out.
3 Wipe the dipstick clean.
4 Reinsert the dipstick fully.
5 Holding a rag under the end,
pull the dipstick out and
check the oil level.
Low
Normal
Excessive
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
6Wipe the dipstick and reinsert
it fully.
■Checking the oil type and
preparing the item needed
Make sure to check the oil type
and prepare the items needed
before adding oil.
 Engine oil selection
P.498
 Oil quantity (Low  Full)
1.6 qt. (1.5 L, 1.3 Imp. qt.)
 Item
Clean funnel
■Adding engine oil
If the oil level is below or near
the low level mark, add engine
oil of the same type as that
already in the engine.
1 Remove the oil filler cap by
turning it counterclockwise.
2 Add engine oil slowly, check-
ing the dipstick.
3 Install the oil filler cap by
turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will
be consumed while driving. In the
following situatio ns, oil consump-

4087-3. Do-it-yourself maintenance
COROLLA HV_Ution may increase, and engine oil
may need to be refilled in between
oil maintenance intervals.
●When the engine is new, for
example directly after purchasing
the vehicle or after replacing the
engine
●If low quality oil or oil of an inap-
propriate viscosity is used
●When driving at high engine
speeds or with a
heavy load, or
when driving while accelerating or
decelerating frequently
●When leaving the engine idling for
a long time, or wh en driving fre-
quently through heavy traffic
■Engine coolant reservoir
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir
when the engine is cold.
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. ( P.489)
■Power control unit coolant
reservoir
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir
when the hybrid system is cold.
WA R N I N G
■Used engine oil
●Used engine oil contains poten-
tially harmful contaminants
which may cause skin disorders
such as inflammation and skin
cancer, so care should be taken
to avoid prolonged and
repeated contact. To remove
used engine oil from your skin,
wash thoroughly with soap and
water.
●Dispose of used oil and filters
only in a safe an d acceptable
manner. Do not dispose of used
oil and filters in household trash,
in sewers or onto the ground.
Call your Toyota dealer, service
station or auto parts store for
information concerning recy-
cling or disposal.
●Do not leave used engine oil
within the rea ch of children.
NOTICE
■To prevent serious engine
damage
Check the oil level on a regular
basis.
■When replacing the engine oil
●Be careful not to spill engine oil
on the vehicle components.
●Avoid overfilling, or the engine
could be damaged.
●Check the oil level on the dip-
stick every time you refill the
vehicle.
●Be sure the engin e oil filler cap
is properly tightened.
Checking the coolant

4097-3. 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.489)
■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.