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Toyota Mirai (2023 year). Manual in english - page 26

421

7-3. Do-it-yourself maintenance

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each tire on the multi-information

display while the tire pressure

warning system determines the

position.

Drive at approximately 25
mph (40 km/h) or more for
approximately 10 to 30 min-
utes.

When initialization is complete, the

inflation pressure of each tire will be

displayed on the multi-information

display.
Even if the vehicle is not driven at

approximately 25 mph (40 km/h) or

more, initialization can be com-

pleted by driving for a long time.

However, if initialization does not

complete after driving for 1 hour or

more, park the vehicle in a safe

place for approximately 20 minutes

and then drive the vehicle again.

■

When initializing

●

Initialization is performed while

driving at a vehicle speed of

approximately 25 mph (40 km/h)

or more.

●

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 pres-

sure adjustment.

●

The tire pressure warning system

can be initialized by yourself, but

depending on the driving condi-

tions and driving environment, ini-

tialization may take some time to

complete.

■

The initialization operation

●

If you have accidentally turned the

power switch off during initializa-

tion, it is not necessary to manu-

ally restart the initialization again,

as initialization will restart auto-

matically the next time the power

switch is turned to ON.

●

If you accidentally perform initial-

ization when initialization is not

necessary, adjust the tire inflation

pressure to the specified level

when the tires are cold, and con-

duct initialization again.

●

While the position of each tire is

being determined and the inflation

pressures are not being displayed

on the multi-information display, if

the inflation pressure of a tire

drops, the tire pressure warning

light will come on.

■

If the tire pressure warning sys-

tem is not initialized properly

●

In the following situations, initial-

ization may take longer than usual

to be completed or may not be

possible. Normally, initialization

completes within approximately

30 minutes.

• Vehicle is not driven at approxi-

mately 25 mph (40 km/h) or more

• Vehicle is driven on unpaved

roads

• Vehicle is driven near other vehi-

cles and system cannot recog-

nize tire pressure warning valve

and transmitters of your vehicle

over those of other vehicles

If initialization does not complete

after driving for 1 hour or more, park

the vehicle in a safe place for

approximately 20 minutes and then

drive the vehicle again.

●

If the vehicle is reversed during

initialization, the data up to that

point is reset, so perform the ini-

tialization procedure again from

the beginning.

422

7-3. Do-it-yourself maintenance

●

In the following situations, initial-

ization will not be started or was

not completed properly and the

system will not operate properly.

Perform the initialization proce-

dure again.

• If, when attempting to start initial-

ization, the tire pressure warning

light does not blink 3 times.

• If, when the vehicle has been

driven for about 20 minutes after

performing initialization, the tire

pressure warning light blinks for

approximately 1 minute and then

illuminates.

If initialization cannot be completed

after performing the above proce-

dure, contact your Toyota dealer.

Every tire pressure warning
valve and transmitter has a
unique ID code. When replacing
a tire pressure warning valve
and transmitter, it is necessary
to register the ID codes.
When registering the ID codes,
perform the following procedure.

When registering the ID
codes, perform the following
procedure.Park the vehicle in
a safe place and turn the

power switch off, wait for
approximately 15 minutes or
more and perform the proce-
dure.

Start the fuel cell system.
(



P.180)

Press

of the meter

control switch to select

Press

to select

“Vehicle Settings” and then
press and hold

Press

to select

“TPWS” and then press

Press

to select

“Change Wheel”. Then press
and hold

until the tire

pressure warning light blinks
slowly 3 times.

Then a message will be displayed

on the multi-information display.
When registration is being per-

formed, the tire pressure warning

light will blink for approximately 1

minute then illuminate and “--” will

be displayed for the inflation pres-

sure of each tire on the multi-infor-

mation display.

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

423

7-3. Do-it-yourself maintenance

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Drive at 25 mph (40 km/h) or
more for approximately 10 to
30 minutes.

Registration is complete when the

tire pressure warning light turns off

and the inflation pressure of each

tire is displayed on the multi-infor-

mation display.
Even if the vehicle is not driven at

approximately 25 mph (40 km/h) or

more, registration can be com-

pleted by driving for a long time.

However, if registration does not

complete after driving for 1 hour or

more, perform the procedure again

from the beginning.

Initialize the tire pressure
warning system. (



P.420)

■

When registering ID codes

●

ID code registration is performed

while driving at a vehicle speed of

approximately 25 mph (40 km/h)

or more.

●

Before performing ID code regis-

tration, make sure that no wheels

with tire pressure warning valve

and transmitters installed are near

the vehicle.

●

Make sure to initialize the tire

pressure warning system after

registering the ID codes. If the

system is initialized before regis-

tering the ID codes, the initialized

values will be invalid.

●

ID codes can be registered by

yourself, but depending on the

driving conditions and driving

environment, registration may

take some time to complete.

■

Canceling ID code registration

●

To cancel ID code registration

after it has been started, turn the

power switch off before driving the

vehicle.

If the vehicle is driven after ID

code registration is started, to

cancel registration, perform the ID

code registration start procedure

again and turn the power switch

off before driving.

●

If ID code registration has been

canceled, the tire pressure warn-

ing light will blink for approxi-

mately 1 minute when the power

switch is turned to ON and then

illuminate. The tire pressure warn-

ing system will be operational

when the tire pressure warning

light turns off.

●

If the warning light does not turn

off even after several minutes

have elapsed, ID code registration

may not have been canceled cor-

rectly. To cancel registration, per-

form the ID code registration start

procedure again and then turn the

power switch off before driving.

■

If ID codes are not registered

properly

●

In the following situations, ID code

registration may take longer than

usual to be completed or may not

be possible. Normally, registration

completes within approximately

30 minutes.

• Vehicle is not parked for approxi-

mately 20 minutes or more before

driving

• Vehicle is not driven at approxi-

mately 25 mph (40 km/h) or more

• Vehicle is driven on unpaved

roads

• Vehicle is driven near other vehi-

cles and system cannot recog-

nize tire pressure warning valves

and transmitters of your vehicle

over those of other vehicles

• Wheel with tire pressure warning

valve and transmitter installed is

inside or near the vehicle

If registration does not complete
after driving for 1 hour or more, per-
form the ID code registration proce-
dure again from the beginning.

●

If the vehicle is reversed during

registration, the data up to that

point is reset, so perform the reg-

istration procedure again from the

424

7-3. Do-it-yourself maintenance

beginning.

●

In the following situations, ID code

registration will not be started or

was not completed properly and

the system will not operate prop-

erly. Perform the ID code registra-

tion procedure again.

• If, when attempting to start ID

code registration, the tire pressure

warning light does not blink slowly

3 times.

• If, when the vehicle has been

driven for about 20 minutes after

performing ID code registration,

the tire pressure warning light

blinks for approximately 1 minute

and then illuminates.

●

If ID code registration cannot be

completed after performing the

above procedure, contact your

Toyota dealer.



Stop the vehicle in a safe
place on a hard, flat surface.



Set the parking brake.



Shift the shift position to P.



Stop the fuel cell system.

■

Jack and tools

As your vehicle is not installed spare

tire, the following tools for replacing

a tire are not included with your

vehicle. They can be purchased at

your Toyota dealer.

●

Wheel nut wrench

●

Jack

●

Jack handle

Replacing the tire

When raising your vehicle
with a jack, position the jack
correctly.
Improper placement may
damage your vehicle or
cause injury.
If necessary tire replace-
ment seems difficult to per-
form, contact your Toyota
dealer.

Before jacking up the
vehicle

425

7-3. Do-it-yourself maintenance

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Chock the tires.

Slightly loosen the wheel
nuts (one turn).

Turn the tire jack portion
by hand until the notch of the

WARNING

■

Using the tire jack

Observe the following precau-

tions.

Improper use of the tire jack may

cause the vehicle to suddenly fall

off the jack, leading to death or

serious injury.

●

Do not use the tire jack for any

purpose other than replacing

tires or installing and removing

tire chains.

●

Do not use other tire jacks for

replacing tires on this vehicle.

●

Put the jack properly in its jack

point.

●

Do not put any part of your body

under the vehicle while it is sup-

ported by the jack.

●

Do not start the fuel cell system

or drive the vehicle while the

vehicle is supported by the jack.

●

Do not raise the vehicle while

someone is inside.

●

When raising the vehicle, do not

put an object on or under the

jack.

●

Do not raise the vehicle to a

height greater than that required

to replace the tire.

●

Use a jack stand if it is neces-

sary to get under the vehicle.

●

When lowering the vehicle,

make sure that there is no-one

near the vehicle. If there are

people nearby, warn them

vocally before lowering.

Removing a tire

Tire

Wheel chock

positions

Front left-hand
side

Behind the rear
right-hand side
tire

Front right-hand
side

Behind the rear
left-hand side tire

Rear left-hand
side

In front of the
front right-hand
side tire

Rear right-hand
side

In front of the
front left-hand
side tire

426

7-3. Do-it-yourself maintenance

jack is in contact with the jack
point.

The jack point guides are located

under the rocker panel. They indi-

cate the jack point positions.

Raise the vehicle until the tire
is slightly raised off the
ground.

Remove all the wheel nuts
and the tire.

When resting the tire on the

ground, place the tire so that the

wheel design faces up to avoid

scratching the wheel surface.

Remove any dirt or foreign
matter from the wheel con-
tact surface.

If foreign matter is on the wheel

contact surface, the wheel nuts

may loosen while the vehicle is in

motion, causing the tire to come off.

WARNING

■

Replacing a tire

Do not touch the disc wheels or

the area around the brakes imme-

diately after the vehicle has been

driven.
After the vehicle has been driven

the disc wheels and the area

around the brakes will be

extremely hot. Touching these

areas with hands, feet or other

body parts while changing a tire,

etc. may result in burns.

Installing the tire

427

7-3. Do-it-yourself maintenance

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Install the tire and loosely
tighten each wheel nut by
hand by approximately the
same amount.

Turn the wheel nuts until the wash-

ers come into contact with the disc

wheel.

Washer

Disc wheel

Lower the vehicle.

Firmly tighten each wheel nut
two or three times in the
order shown in the illustra-
tion.
Tightening torque:

103 ft•lbf (140 N•m, 14.3
kgf•m)

WARNING

■

When installing the tire

Failure to follow these precau-

tions could cause the wheel nuts

to loosen and the tire to fall off,

resulting in death or serious injury.

●

Never use oil or grease on the

wheel bolts or wheel nuts.

Oil and grease may cause the

wheel nuts to be excessively

tightened, leading to bolt or disc

wheel damage. In addition, the

oil or grease can cause the

wheel nuts to loosen and the

wheel may fall off, causing a

serious accident. Remove any

oil or grease from the wheel

bolts or wheel nuts.

●

Have the wheel nuts tightened

with a torque wrench to 103

ft•lbf (140 N•m, 14.3 kgf•m) as

soon as possible after changing

wheels.

●

Do not attach a heavily dam-

aged wheel ornament, as it may

fly off the wheel while the vehi-

cle is moving.

●

When installing a tire, only use

wheel nuts that have been spe-

cifically designed for that wheel.

428

7-3. Do-it-yourself maintenance

The recommended cold tire
inflation pressure and tire size
are displayed on the tire and
loading information label.
(



P.501)

Tire valve

WARNING

●

If there are any cracks or defor-

mations in the bolt screws, nut

threads or bolt holes of the

wheel, have the vehicle

inspected by your Toyota

dealer.

NOTICE

■

Repairing or replacing tires,

wheels, tire pressure warn-

ing valves, transmitters and

tire valve caps



P.419

Tire inflation pressure

Checking the specified
tire inflation pressure

Inspection and adjust-
ment procedure

429

7-3. Do-it-yourself maintenance

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Tire pressure gauge

Remove the tire valve cap.

Press the tip of the tire pres-
sure gauge onto the tire
valve.

Read the pressure using the
gauge gradations.

If the tire inflation pressure is
not at the recommended
level, adjust the pressure.
If you add too much air, press
the center of the valve to
deflate.

After completing the tire infla-
tion pressure measurement
and adjustment, apply soapy
water to the valve and check
for leakage.

Put the tire valve cap back
on.

■

Tire inflation pressure check

interval

You should check tire inflation pres-

sure every two weeks, or at least

once a month. Do not forget to

check the spare.

■

Effects of incorrect tire inflation

pressure

Driving with incorrect tire inflation

pressure may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor

handling

●

Reduced tire life due to wear

●

Reduced safety

●

Damage to the drive train

If a tire needs frequent inflating,

have it checked by your Toyota

dealer.

■

Instructions for checking tire

inflation pressure

When checking tire inflation pres-

sure, observe the following:

●

Check only when the tires are

cold.

If your vehicle has been parked for

at least 3 hours or has not been

driven for more than 1 mile or 1.5

km, you will get an accurate cold

tire inflation pressure reading.

●

Always use a tire pressure gauge.

It is difficult to judge if a tire is

properly inflated based only on its

appearance.

●

It is normal for the tire inflation

pressure to be higher after driving

as heat is generated in the tire. Do

not reduce tire inflation pressure

after driving.

●

Never exceed the vehicle capacity

weight.

Passengers and luggage weight

should be placed so that the vehi-

cle is balanced.

WARNING

■

Proper inflation is critical to

save tire performance

Keep your tires properly inflated.

If the tires are not properly

inflated, the following conditions

may occur which could lead to an

accident resulting in death or seri-

ous injury:

●

Excessive wear

●

Uneven wear

●

Poor handling

●

Possibility of blowouts resulting

from overheated tires

●

Air leaking from between tire

and wheel

●

Wheel deformation and/or tire

damage

430

7-3. Do-it-yourself maintenance

When replacing wheels, care
should be taken to ensure that
they are equivalent to those
removed in load capacity, diam-
eter, rim width and inset

Replacement wheels are avail-
able at your Toyota dealer.

: Conventionally referred to as off-

set.

Toyota does not recommend
using the following:



Wheels of different sizes or
types



Used wheels



Bent wheels that have been
straightened

■

When replacing wheels

The wheels of your vehicle are

equipped with tire pressure warning

valves and transmitters that allow

the tire pressure warning system to

provide advance warning in the

event of a loss in tire inflation pres-

sure. Whenever wheels are

replaced, the tire pressure warning

valves and transmitters must be

installed. (



P.419)

WARNING

●

Greater possibility of tire dam-

age while driving (due to road

hazards, expansion joints,

sharp edges in the road, etc.)

NOTICE

■

When inspecting and adjust-

ing tire inflation pressure

Be sure to put the tire valve caps

back on.

If a valve cap is not installed, dirt

or moisture may get into the valve

and cause an air leak, resulting in

decreased tire inflation pressure.

Wheels

If a wheel is bent, cracked or
heavily corroded, it should
be replaced. Otherwise, the
tire may separate from the
wheel or cause a loss of
handling control.

Wheel selection

431

7-3. Do-it-yourself maintenance

Maintena

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

Use only Toyota wheel nuts
and wheel nut wrenches
designed for use with your
aluminum wheels.



When rotating, repairing or
changing your tires, check
that the wheel nuts are still
tight after driving 1000 miles
(1600 km).



Be careful not to damage the
aluminum wheels when using
tire chains.



Use only Toyota genuine bal-
ance weights or equivalent
and a plastic or rubber ham-
mer when balancing your
wheels.

WARNING

■

When replacing wheels

●

Do not use wheels that are a dif-

ferent size from those recom-

mended in the Owner’s Manual,

as this may result in a loss of

handling control.

●

Never use an inner tube in a

leaking wheel which is designed

for a tubeless tire.

Doing so may result in an acci-

dent, causing death or serious

injury.

■

When installing the wheel

nuts

Never use oil or grease on the

wheel bolts or wheel nuts. Oil and

grease may cause the wheel nuts

to be excessively tightened, lead-

ing to bolt or disc wheel damage.

In addition, the oil or grease can

cause the wheel nuts to loosen

and the wheel may fall off, caus-

ing an accident and resulting in

death or serious injury. Remove

any oil or grease from the wheel

bolts or wheel nuts.

■

Use of defective wheels pro-

hibited

Do not use cracked or deformed

wheels. Doing so could cause the

tire to leak air during driving, pos-

sibly causing an accident.

NOTICE

■

Replacing tire pressure warn-

ing valves and transmitters

●

Because tire repair or replace-

ment may affect the tire pres-

sure warning valves and

transmitters, make sure to have

tires serviced by your Toyota

dealer or other qualified service

shop. In addition, make sure to

purchase your tire pressure

warning valves and transmit-

ters at your Toyota dealer.

●

Ensure that only genuine Toyota

wheels are used on your vehi-

cle.

Tire pressure warning valves

and transmitters may not work

properly with non-genuine

wheels.

Aluminum wheel precau-
tions

432

7-3. Do-it-yourself maintenance

Turn the power switch off.

Open the glove box.

Remove the panel.

Unlock the filter cover ( ),
pull the filter cover out of the

claws ( ), and remove the
filter cover.

Remove the filter case.

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

Inspect and replace the air condi-

tioning filter according to the mainte-

nance schedule. In dusty areas or

Air conditioning filter

The air conditioning filter
must be changed regularly
to maintain air conditioning
efficiency.

Removing the air condi-
tioning filter

433

7-3. Do-it-yourself maintenance

Maintena

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areas with heavy traffic flow, early

replacement may be required. (For

scheduled 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.

■

Air conditioning filter with

deodorizing function

When fragrances are placed in your

vehicle, the deodorizing effect may

become significantly weakened in a

short period.

When an air conditioning odor

comes out continuously, replace the

air conditioning filter.

■

Scheduled maintenance of the

air intake vents is necessary

when

In some situations such as when the

vehicle is used frequently or in

heavy traffic or dusty areas, the air

intake vents may need to be

cleaned more regularly.

For details, refer to the “Owner’s

Warranty Information Booklet” or

“Owner’s Manual Supplement”.

■

Cleaning the air intake vents

Improper handling of the air intake

vent covers and filters may result in

damage to them. If you have any

concerns about cleaning the filter,

contact your Toyota dealer.

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 traction

battery air intake

vents

To prevent the fuel economy
from being affected, visually
inspect the traction battery
air intake vents periodically
for clogs. If it is dusty or
clogged or if “Maintenance
Required for Traction Bat-
tery Cooling Parts See
Owner’s Manual” is shown
on the multi-information
display, clean the air intake
vents using the following
procedures:

434

7-3. Do-it-yourself maintenance

Turn the power switch off.

Remove the grille.

Remove the filter from the air
intake vent grille.

If dust has accumulated on the air

intake vent grille, remove the dust

with a vacuum cleaner, etc.

Remove the dust and sand
from the filter.

Using a vacuum cleaner, etc.,

absorb dust and sand from the filter

by profiling the nozzle lightly along

the fold.

Hold the filter to the light and
check if it is not clogged.

If the dust or sand cannot be

removed completely, contact your

Toyota dealer.

Reinstall the filter to the grille.

NOTICE

■

If “Maintenance Required for

Traction Battery Cooling

Parts See Owner’s Manual” is

shown on the multi-informa-

tion display

Clean the air intake vents immedi-

ately.

If the vehicle is continuously

driven with the warning message

displayed, it may cause a mal-

function or output restriction of the

traction battery.

Cleaning procedure

435

7-3. Do-it-yourself maintenance

Maintena

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Install the grille.



If “Maintenance Required for
Traction Battery Cooling Parts
See Owner’s Manual” was
displayed on the multi-infor-
mation display

Start the fuel cell system and
check that the warning mes-
sage is no longer displayed.

It may be necessary to drive the

vehicle for approximately 20 min-

utes before the warning message is

displayed again then disappears.
If the warning message does not

disappear after some time, have

the vehicle inspected by your Toy-

ota dealer.

■

If the dust or sand on the filter

cannot be removed

It is recommended to use a vacuum

cleaner with plastic brushes.

WARNING

■

When cleaning the air intake

vents

●

Do not use water or other liq-

uids to clean the air intake

vents. If water is applied to the

traction battery or other compo-

nents, a malfunction or fire may

occur.

●

Before cleaning the air intake

vents, make sure to turn the

power switch off to stop the fuel

cell system.

●

Do not put a hand or leg in the

air intake vent. If it is caught in a

cooling fan, or if it touches a

high voltage part that results in

an electric shock, death or seri-

ous injuries may result.

■

When removing the air intake

vent covers

Do not touch the service plug

located near the air intake vents.

(



P.81)

NOTICE

■

When cleaning the air intake

vents

Do not use an air blow gun, etc.

Dust may be blown out, possibly

causing a malfunction or output

restriction of the traction battery.

■

To prevent damage to the

vehicle

Observe the following precau-

tions:

●

Do not allow water or foreign

matter to enter the air intake

vent.

●

Make sure to reinstall the filter

and cover to their original posi-

tions after cleaning.

436

7-3. Do-it-yourself maintenance

■

If the electronic key battery is

depleted

The following symptoms may occur:

●

The smart key system and wire-

less remote control will not func-

tion properly.

●

The operational range will be

reduced.



Flathead screwdriver



Small flathead screwdriver



Lithium battery CR2032

■

Use a CR2032 lithium battery

●

Batteries can be purchased at

your Toyota dealer, local electrical

appliance shops or camera stores.

●

Replace only with the same or

equivalent type recommended by

the manufacturer.

●

Dispose of used batteries accord-

ing to local laws.

NOTICE

●

Do not install anything to the air

intake vent other than the exclu-

sive filter for this vehicle or use

the vehicle without the filter

installed.

■

To prevent damage to the fil-

ter

Observe the following precau-

tions.

If the filter is damaged, have it

replaced with a new filter by your

Toyota dealer.

●

Do not use an air blow gun, etc.

●

Do not press hard a vacuum

cleaner, etc. against the filter.

●

Do not use a hard brush, such

as a metal brush.

●

Do not break the fold of the fil-

ter.

Electronic key battery

Replace the battery with a
new one if it is depleted.
As the key may be damaged
if the following procedure is
not performed properly, it is
recommended that key bat-
tery replacement be per-
formed by your Toyota
dealer.

Items to prepare

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