Toyota Corolla Hybrid (2020 year). Owner's manual — part 26

406

7-3. Do-it-yourself maintenance

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 compartment

Components

Checking and adding the
engine oil

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7-3. Do-it-yourself maintenance

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■

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.

6

Wipe 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 situations, oil consump-

408

7-3. Do-it-yourself maintenance

tion 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 when 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.

WARNING

■

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 and 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 reach 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 engine oil filler cap

is properly tightened.

Checking the coolant

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7-3. Do-it-yourself maintenance

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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)

■

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.

WARNING

■

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

Be sure to wash it off with water to

prevent it from damaging parts or

paint.

Checking the radiator and
condenser

WARNING

■

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.

410

7-3. Do-it-yourself maintenance

■

Checking fluid level

The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.

■

Adding fluid

1

Slide and lift up the rubber
strip to partly remove it as
shown.

2

Disconnect the claws and
remove the service cover.

3

Remove the reservoir cap.

4

Add brake fluid slowly while
checking the fluid level.

Make sure to check the fluid
type and prepare the necessary
item.


Fluid type

FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
FMVSS No.116 DOT 4 or SAE
J1704 brake fluid



Item

Clean funnel

■

Brake fluid can absorb moisture

from the air

Excess moisture in the brake fluid

can cause a dangerous loss of brak-

ing efficiency. Use only newly

opened brake fluid.

Checking and adding the
brake fluid

WARNING

■

When filling the reservoir

Take care as brake fluid can harm

your hands and eyes and damage

painted surfaces.

If fluid gets on your hands or in

your eyes, flush the affected area

with clean water immediately.
If you still experience discomfort,

see a doctor.

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Check the 12-volt battery as fol-
lows.

■

12-volt battery exterior

Make sure that the 12-volt bat-
tery terminals are not corroded
and that there are no loose con-
nections, cracks, or loose
clamps.

Terminals
Hold-down clamp

■

Before recharging

When recharging, the 12-volt bat-

tery produces hydrogen gas which

is flammable and explosive. There-

fore, observe the following precau-

tions before recharging:

●

If recharging with the 12-volt bat-

tery installed on the vehicle, be

sure to disconnect the ground

cable.

●

Make sure the power switch on

the charger is off when connecting

and disconnecting the charger

cables to the 12-volt battery.

■

After recharging/reconnecting

the 12-volt battery

●

Unlocking the doors using the

smart key system may not be pos-

sible immediately after reconnect-

ing the 12-volt battery. If this

happens, use the wireless remote

control or the mechanical key to

lock/unlock the doors.

●

Start the hybrid system with the

power switch in ACC. The hybrid

system may not start with the

power switch turned off. However,

the hybrid system will operate nor-

mally from the second attempt.

●

The power switch mode is

recorded by the vehicle. If the

12-volt battery is reconnected, the

vehicle will return the power

switch mode to the status it was in

before the 12-volt battery was dis-

connected. Make sure to turn off

the power before disconnecting

the 12-volt battery. Take extra

care when connecting the 12-volt

battery if the power switch mode

prior to discharge is unknown.

If the system will not start even after

multiple attempts, contact your Toy-

ota dealer.

NOTICE

■

If the fluid level is low or high

It is normal for the brake fluid level

to go down slightly as the brake

pads wear out or when the fluid

level in the accumulator is high.

If the reservoir needs frequent

refilling, there may be a serious

problem.

12-volt battery

WARNING

■

Chemicals in the 12-volt bat-

tery

The 12-volt battery contains poi-

sonous and corrosive sulfuric acid

and may produce hydrogen gas

which is flammable and explosive.

To reduce the risk of death or seri-

ous injury, take the following pre-

cautions while working on or near

the 12-volt battery:

●

Do not cause sparks by touch-

ing the 12-volt battery terminals

with tools.

412

7-3. Do-it-yourself maintenance

Add washer fluid in the following
situations:


A washer does not work.



The warning message
appears on the multi-informa-
tion display.

WARNING

●

Do not smoke or light a match

near the 12-volt battery.

●

Avoid contact with eyes, skin

and clothes.

●

Never inhale or swallow electro-

lyte.

●

Wear protective safety glasses

when working near the 12-volt

battery.

●

Keep children away from the

12-volt battery.

■

Where to safely charge the

12-volt battery

Always charge the 12-volt battery

in an open area. Do not charge

the 12-volt battery in a garage or

closed room where there is insuf-

ficient ventilation.

■

Emergency measures regard-

ing electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean

water for at least 15 minutes

and get immediate medical

attention. If possible, continue

to apply water with a sponge or

cloth while traveling to the near-

est medical facility.

●

If electrolyte gets on your skin

Wash the affected area thor-

oughly. If you feel pain or burn-

ing, get medical attention

immediately.

●

If electrolyte gets on your

clothes

It can soak through clothing on

to your skin. Immediately take

off the clothing and follow the

procedure above if necessary.

●

If you accidentally swallow elec-

trolyte

Drink a large quantity of water

or milk. Get emergency medical

attention immediately.

■

When disconnecting the

12-volt battery

Do not disconnect the negative (-)

terminal on the body side. The

disconnected negative (-) terminal

may touch the positive (+) termi-

nal, which may cause a short and

result in death or serious injury.

NOTICE

■

When recharging the 12-volt

battery

Never recharge the 12-volt bat-

tery while the hybrid system is

operating. Also, be sure all acces-

sories are turned off.

Adding the washer fluid

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7-3. Do-it-yourself maintenance

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Check if the treadwear indica-
tors are showing on the tires.
Also check the tires for uneven
wear, such as excessive wear
on one side of the tread.
Check the spare tire condition
and pressure if not rotated.

New tread
Worn tread
Treadwear indicator

The location of treadwear indicators
is shown by a “TWI” or “

” mark,

WARNING

■

When adding washer fluid

Do not add washer fluid when the

hybrid system is hot or operating

as washer fluid contains alcohol

and may catch fire if spilled on the

engine, etc.

NOTICE

■

Do not use any fluid other

than washer fluid

Do not use soapy water or engine

antifreeze instead of washer fluid.

Doing so may cause streaking on

the vehicle’s painted surfaces, as

well as damaging the pump lead-

ing to problems of the washer

fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as

necessary.

Refer to the freezing tempera-

tures listed on the label of the

washer fluid bottle.

Tires

Replace or rotate tires in
accordance with mainte-
nance schedules and tread-
wear.

Checking tires

414

7-3. Do-it-yourself maintenance

etc., molded into the sidewall of
each tire.
Replace the tires if the treadwear
indicators are showing on a tire.

■

When to replace your vehicle’s

tires

Tires should be replaced if:

●

The treadwear indicators are

showing on a tire

●

You have tire damage such as

cuts, splits, cracks deep enough

to expose the fabric, and bulges

indicating internal damage

●

A tire goes flat repeatedly or can-

not be properly repaired due to the

size or location of a cut or other

damage

If you are not sure, consult with your

Toyota dealer.

■

Tire life

Any tire over 6 years old must be

checked by a qualified technician

even if it has seldom or never been

used or damage is not obvious.

■

Maximum load of tire

Check that the maximum load of the

replacement tire is greater than 1/2

of the Gross Axle Weight Ratings

(GAWR) of either the front axle or

the rear axle, whichever is greater.
For the GAWR, see the Certification

Label.

For the maximum load of the tire,

see the load limit at maximum cold

tire inflation pressure mentioned on

the sidewall of the tire. (P.505)

■

Tire types

●

Summer tires

Summer tires are high-speed perfor-
mance tires best suited to highway
driving under dry conditions. Since
summer tires do not have the same
traction performance as snow tires,
summer tires are inadequate for
driving on snow-covered or icy
roads. For driving on snow-covered
roads or icy roads, the use of snow
tires is recommended. When install-
ing snow tires, be sure to replace all
four tires.

●

All season tires

All season tires are designed to pro-
vide better traction in snow and to
be adequate for driving in most win-
ter conditions as well as for use
year-round. All season tires, how-
ever, do not have adequate traction
performance compared with snow
tires in heavy or loose snow. Also,
all season tires fall short in accelera-
tion and handling performance com-
pared with summer tires in highway
driving.

●

Snow tires

For driving on snow-covered roads
or icy roads, we recommend using
snow tires. If you need snow tires,
select tires of the same size, con-
struction and load capacity as the
originally installed tires. Since your
vehicle has radial tires as original
equipment, make sure your snow
tires also have radial construction.
Do not install studded tires without
first checking local regulations for
possible restrictions. Snow tires
should be installed on all wheels.
(P.228)

■

If the tread on snow tires wears

down below 0.16 in. (4 mm)

The effectiveness of the tires as

snow tires is lost.

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Checking the tire valves

When replacing the tires, check the

tire valves for deformation, cracks,

and other damage.

Rotate the tires in the order
shown.

Front

To equalize tire wear and extend
tire life, Toyota recommends that
tire rotation is carried out at the
same interval as tire inspection.
Vehicles with a tire pressure warn-
ing system: Do not fail to initialize
the tire pressure warning system
after tire rotation.

Your vehicle is equipped with a
tire pressure warning system
that uses tire pressure warning
valves and transmitters to detect

WARNING

■

When inspecting or replacing

tires

Observe the following precautions

to prevent accidents.

Failure to do so may cause dam-

age to parts of the drive train as

well as dangerous handling char-

acteristics, which may lead to an

accident resulting in death or seri-

ous injury.

●

Do not mix tires of different

makes, models or tread pat-

terns.

Also, do not mix tires of remark-

ably different treadwear.

●

Do not use tire sizes other than

those recommended by Toyota.

●

Do not mix differently con-

structed tires (radial, bias-belted

or bias-ply tires).

●

Do not mix summer, all season

and snow tires.

●

Do not use tires that have been

used on another vehicle.

Do not use tires if you do not

know how they were used previ-

ously.

NOTICE

■

If tire inflation pressure of

each tire becomes low while

driving

Do not continue driving, or your

tires and/or wheels may be

ruined.

■

Driving on rough roads

Take particular care when driving

on roads with loose surfaces or

potholes.

These conditions may cause

losses in tire inflation pressure,

reducing the cushioning ability of

the tires. In addition, driving on

rough roads may cause damage

to the tires themselves, as well as

the vehicle’s wheels and body.

Tire rotation

Tire pressure warning
system (if equipped)

416

7-3. Do-it-yourself maintenance

low tire inflation pressure before
serious problems arise.
If the tire pressure drops below
a predetermined level, the driver
is warned by a warning light.
(P.454)

■

Routine tire inflation pressure

checks

The tire pressure warning system

does not replace routine tire inflation

pressure checks. Make sure to

check tire inflation pressure as part

of your routine of daily vehicle

checks.

■

Situations in which the tire

pressure warning system may

not operate properly

●

In the following cases, the tire

pressure warning system may not

operate properly.

• If non-genuine Toyota wheels are

used.

• A tire has been replaced with a

tire that is not an OE (Original

Equipment) tire.

• A tire has been replaced with a

tire that is not of the specified size.

• Tire chains, etc. are equipped.

• An auxiliary-supported run-flat tire

is equipped.

• If a window tint that affects the

radio wave signals is installed.

• If there is a lot of snow or ice on

the vehicle, particularly around the

wheels or wheel housings.

• If the tire inflation pressure is

extremely higher than the speci-

fied level.

• If tires not equipped with tire pres-

sure warning valves and transmit-

ters are used.

• If the ID code on the tire pressure

warning valves and transmitters is

not registered in the tire pressure

warning computer.

●

Performance may be affected in

the following situations.

• Near a TV tower, electric power

plant, gas station, radio station,

large display, airport or other facil-

ity that generates strong radio

waves or electrical noise.

• When carrying a portable radio,

cellular phone, cordless phone or

other wireless communication

device.

●

When the vehicle is parked, the

time taken for the warning to start

or go off could be extended.

●

When tire inflation pressure

declines rapidly for example when

a tire has burst, the warning may

not function.

■

Warning performance of the tire

pressure warning system

The warning of the tire pressure

warning system will change in

accordance with driving conditions.

For this reason, the system may

give a warning even if the tire pres-

sure does not reach a low enough

level, or if the pressure is higher

than the pressure that was adjusted

to when the system was initialized.

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7-3. Do-it-yourself maintenance

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Tire pressure warning system certification



Except for vehicles sold in Canada

418

7-3. Do-it-yourself maintenance



For vehicles sold in Canada

When replacing tires or wheels,
tire pressure warning valves and
transmitters must also be
installed.
When new tire pressure warning
valves and transmitters are
installed, new ID codes must be
registered in the tire pressure
warning computer and the tire
pressure warning system must
be initialized. Have tire pressure
warning valves and transmitter
ID codes registered by your Toy-
ota dealer. (P.420)

■

Replacing tires and wheels

If the ID code of the tire pressure

warning valve and transmitter is not

registered, the tire pressure warning

system will not work properly. After

driving for about 20 minutes, the tire

pressure warning light blinks for 1

minute and stays on to indicate a

system malfunction.

Installing tire pressure
warning valves and trans-
mitters (vehicles with a
tire pressure warning sys-
tem)

NOTICE

■

Repairing or replacing tires,

wheels, tire pressure warn-

ing valves, transmitters and

tire valve caps

●

When removing or fitting the

wheels, tires or the tire pressure

warning valves and transmit-

ters, contact your Toyota dealer

as the tire pressure warning

valves and transmitters may be

damaged if not handled cor-

rectly.

419

7-3. Do-it-yourself maintenance

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The tire pressure warning
system must be initialized
in the following circum-
stances:



When rotating front and rear
tires which have different tire
inflation pressures.



When changing the tire size.



When the tire inflation pres-
sure is changed such as
when changing traveling
speed or load weight.



When changing between two

registered wheel sets.

When the tire pressure warning
system is initialized, the current
tire inflation pressure is set as
the benchmark pressure.

■

How to initialize the tire
pressure warning system

1

Park the vehicle in a safe
place and turn the power
switch off.

Initialization cannot be performed

while the vehicle is moving.

2

Adjust the tire inflation pres-
sure to the specified cold tire
inflation pressure level.
(P.501)

Make sure to adjust the tire pres-

sure to the specified cold tire infla-

tion pressure level. The tire

pressure warning system will oper-

ate based on this pressure level.

3

Turn the power switch to ON.

4

Press

or

of the meter

control switch to select

.

5

Press

or

to select

“Vehicle Settings” and then

press and hold

.

6

Press

or

to select

“TPWS” and then press

.

7

Press

or

to select “Set

Pressure”. Then press and

hold

until the tire pres-

NOTICE

●

Make sure to install the tire

valve caps. If the tire valve caps

are not installed, water could

enter the tire pressure warning

valves and the tire pressure

warning valves could be bound.

●

When replacing tire valve caps,

do not use tire valve caps other

than those specified. The cap

may become stuck.

■

To avoid damage to the tire

pressure warning valves and

transmitters

When a tire is repaired with liquid

sealants, the tire pressure warn-

ing valve and transmitter may not

operate properly. If a liquid seal-

ant is used, contact your Toyota

dealer or other qualified service

shop as soon as possible. Make

sure to replace the tire pressure

warning valve and transmitter

when replacing the tire. (



P.418)

Initializing the tire pres-
sure warning system (if
equipped)

420

7-3. Do-it-yourself maintenance

sure warning light blinks 3
times.

■

Initialization procedure

●

Make sure to carry out initializa-

tion after adjusting the tire inflation

pressure.

Also, make sure the tires are cold

before carrying out initialization or

tire inflation pressure adjustment.

●

If you have accidentally turned the

power switch off during initializa-

tion, it is not necessary to press

the reset switch again as initializa-

tion will restart automatically when

the power switch to ON for the

next time.

●

If initialization has accidentally

been started when it is not neces-

sary, adjust the tire inflation pres-

sure to the specified level when

the tires are cold, and then per-

form the initialization procedure

again.

■

When initialization of the tire

pressure warning system has

failed

Initialization can be completed in a

few minutes. However, in the follow-

ing cases, the settings have not

been recorded and the system will

not operate properly. If repeated

attempts to record tire inflation pres-

sure settings are unsuccessful,

have the vehicle inspected by your

Toyota dealer.

●

When attempting to start initializa-

tion, the tire pressure warning light

does not blink 3 times.

●

After driving for a certain period of

time since the initialization has

been completed, the warning light

comes on after blinking for 1 min-

ute.

The tire pressure warning valve
and transmitter is equipped with
a unique ID code. When replac-
ing a tire pressure warning valve
and transmitter, it is necessary
to register the ID code. Have the
ID code registered by your Toy-
ota dealer.

Your vehicle is equipped with
tire pressure warning system
with the function to have ID
codes registered for a second
wheel set, for example a winter
set, by Toyota dealer.
After registration of a second
wheel set, either of these two
wheel sets can be selected for
usage with the tire pressure
warning system.

WARNING

■

When initializing the tire pres-

sure warning system

Do not initialize the tire pressure

warning system without first

adjusting the tire inflation pres-

sure to the specified level. Other-

wise, the tire pressure warning

light may not come on even if the

tire inflation pressure is low, or it

may come on when the tire infla-

tion pressure is actually normal.

Registering ID codes

Selecting wheel set

421

7-3. Do-it-yourself maintenance

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■

Operating conditions for
the function



This function will perform the
change of wheel set only if a
second wheel set has been
registered. If no second wheel
set has been registered, no
change will be made when
selecting this function in the
menu.



Only a change between both
registered wheel set is possi-
ble, mixing between these
wheel sets is not supported.

■

How to change between
wheel sets

1

Have the vehicle fitted with
the preferred wheel set.

2

Press

or

of the meter

control switch to select

.

3

Press

or

to select

“Vehicle Settings” and then

press

.

4

Press

or

to select

“TPWS” and then press

.

5

Press

or

to select

“Change Wheel”. Then press

and hold

until the tire

pressure warning light blinks
slowly 3 times.

6

Initialize the tire pressure
warning system. (P.419)