Toyota Mirai (2023 year). Manual in english

437

7-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

Take out the mechanical key.

Remove the cover.

To prevent damage to the key,

cover the tip of the flathead screw-

driver with a rag.

Remove the depleted battery.

Insert a new battery with the “+” ter-

minal facing up.

Replacing the battery

WARNING

■

Battery precautions

Observe the following precau-

tions.

Failure to do so may result in

death or serious injury.

●

Do not swallow the battery.

Doing so may cause chemical

burns.

●

A coin battery or button battery

is used in the electronic key. If a

battery is swallowed, it may

cause severe chemical burns in

as little as 2 hours and may

result in death or serious injury.

●

Keep away new and removed

batteries from children.

●

If the cover cannot be firmly

closed, stop using the electronic

key and stow the key in the

place where children cannot

reach, and then contact your

Toyota dealer.

●

If you accidentally swallow a

battery or put a battery into a

part of your body, get emer-

gency medical attention imme-

diately.

■

To prevent battery explosion

or leakage of flammable liq-

uid or gas

●

Replace the battery with a new

battery of the same type. If a

wrong type of battery is used, it

may explode.

●

Do not expose batteries to

extremely low pressure due to

high altitude or extremely high

temperatures.

●

Do not burn, break or cut a bat-

tery.

438

7-3. Do-it-yourself maintenance

Turn the power switch off.

Open the fuse box cover.



Fuel cell unit compartment:
type A fuse box

Push the tabs in and lift the lid off.



Fuel cell unit compartment:
type B fuse box

Remove the fuel cell unit compart-
ment cover (



P.409) and push the

tabs in and lift the lid off.

NOTICE

■

When replacing the battery

Use a flathead screwdriver of

appropriate size. Applying exces-

sive force may deform or damage

the cover.

■

For normal operation after

replacing the battery

Observe the following precautions

to prevent accidents:

●

Always work with dry hands.

Moisture may cause the battery

to rust.

●

Do not touch or move any other

component inside the remote

control.

●

Do not bend either of the battery

terminals.

Checking and replac-

ing fuses

If any of the electrical com-
ponents do not operate, a
fuse may have blown. If this
happens, check and replace
the fuses as necessary.

Checking and replacing
fuses

439

7-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca



Driver’s side instrument panel

Push the tab in and remove the lid.
Make sure to push the tab in during
removal or installation.



Passenger’ side instrument
panel

Remove the cover.

Remove the footwell lights connec-
tor.

Remove the lid.
Make sure to push the claw when
removing/installing the lid.

440

7-3. Do-it-yourself maintenance



Trunk

Remove the luggage mat
(



P.361), and while lifting up the

luggage under tray, use a flathead
screw driver and remove the clip.

Push the tab in and lift the lid off.

Remove the fuse with the
pullout tool.
Only type A fuse can be
removed using the pullout
tool.

Check if the fuse is blown.

Type A and B:

Replace the blown fuse with a new

fuse of an appropriate amperage

rating. The amperage rating can be

found on the fuse box lid.
Type C and D:

Contact your Toyota dealer.



Type A

Normal fuse

441

7-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

Blown fuse



Type B

Normal fuse

Blown fuse



Type C

Normal fuse

Blown fuse



Type D

Normal fuse

Blown fuse

■

After a fuse is replaced

●

When installing the lid, make sure

that the tab is installed securely.

●

If the lights do not turn on even

after the fuse has been replaced,

a bulb may need replacement.

●

If the replaced fuse blows again,

have the vehicle inspected by

your Toyota dealer.

■

If there is an overload in a cir-

cuit

The fuses are designed to blow, pro-

tecting the wiring harness from

damage.

WARNING

■

To prevent system break-

downs and vehicle fire

Observe the following precau-

tions.

Failure to do so may cause dam-

age to the vehicle, and possibly a

fire or injury.

●

Never use a fuse of a higher

amperage rating than that indi-

cated, or use any other object in

place of a fuse.

●

Always use a genuine Toyota

fuse or equivalent.

Never replace a fuse with a

wire, even as a temporary fix.

●

Do not modify the fuses or fuse

boxes.

NOTICE

■

Before replacing fuses

Have the cause of electrical over-

load determined and repaired by

your Toyota dealer as soon as

possible.

442

7-3. Do-it-yourself maintenance

Adjustment bolt A

Adjustment bolt B



Make sure the vehicle has a
full tank of fuel and the area
around the headlight is not
deformed.



Park the vehicle on level
ground.



Make sure the tire inflation
pressure is at the specified
level.



Have someone sit in the
driver’s seat.



Bounce the vehicle several
times.

Using a Phillips-head screw-
driver, turn bolt A in either
direction.
Remember the turning direc-
tion and the number of turns.

Turn bolt B the same number
of turns and in the same
direction as step

If the headlight cannot be adjusted

using this procedure, take the vehi-

cle to your Toyota dealer to adjust

the headlight aim.

Headlight aim

Vertical movement adjust-
ing bolts

Before checking the head-
light aim

Adjusting the headlight
aim

443

7-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

■

LED Lights

The lights consist of a number of

LEDs. If any of the LEDs burn out,

take your vehicle to your Toyota

dealer to have the light replaced.

■

Condensation build-up on the

inside of the lens

Temporary condensation build-up

on the inside of the headlight lens

does not indicate a malfunction.

Contact your Toyota dealer for more

information in the following situa-

tions:

●

Large drops of water have built up

on the inside of the lens.

●

Water has built up inside the

headlight.

Light bulbs

If any lights burn out, have it
replaced by your Toyota
dealer.

445

Whe

n tr

ouble

rises

When trouble arises

8-1. Essential information

Emergency flashers ....

446

If your vehicle has to be

stopped in an emergency

..................................

446

If the vehicle is submerged

or water on the road is ris-
ing .............................

447

8-2. Steps to take in an emer-

gency

If your vehicle needs to be

towed.........................

449

If you think something is

wrong.........................

453

If a warning light turns on or

a warning buzzer sounds

..................................

454

If a warning message is dis-

played........................

464

If you have a flat tire....

467

If the fuel cell system will not

start ...........................

480

If you lose your keys ...

481

If the fuel door cannot be

opened ......................

482

If the electronic key does

not operate properly ..

482

If the 12-volt battery is dis-

charged .....................

485

If your vehicle overheats

..................................

490

If the vehicle becomes stuck

..................................

494

446

8-1. Essential information

8-1.Essential information

Press the switch to flash all of
the turn signal lights.

To turn them off, press the switch
once again.

■

Emergency flashers

●

If the emergency flashers are

used for a long time while the fuel

cell system is not operating (while

the “READY” indicator is not illu-

minated), the 12-volt battery may

discharge.

●

If any of the SRS airbags deploy

(inflate) or in the event of a strong

rear impact, the emergency flash-

ers will turn on automatically.

The emergency flashers will turn

off automatically after operating

for approximately 20 minutes. To

manually turn the emergency

flashers off, press the switch

twice.

(The emergency flashers may not

turn on automatically depending

on the force of the impact and

conditions of the collision.)

Steadily step on the brake
pedal with both feet and
firmly depress it.

Do not pump the brake pedal

repeatedly as this will increase the

effort required to slow the vehicle.

Shift the shift position to N.



If the shift position is shifted to
N

After slowing down, stop the
vehicle in a safe place by the
road.

Stop the fuel cell system.



If the shift position cannot be
shifted to N

Keep depressing the brake
pedal with both feet to reduce
vehicle speed as much as
possible.

To stop the fuel cell system,
press and hold the power
switch for 2 consecutive sec-
onds or more, or press it

Emergency flashers

The emergency flashers are
used to warn other drivers
when the vehicle has to be
stopped on the road due to
a breakdown, etc.

Operating instructions

If your vehicle has to

be stopped in an emer-

gency

Only in an emergency, such
as if it becomes impossible
to stop the vehicle in the
normal way, stop the vehicle
using the following proce-
dure:

Stopping the vehicle

447

8-1. Essential information

Whe

n tr

ouble

rises

briefly 3 times or more in suc-
cession.

Stop the vehicle in a safe
place by the road.



If the door can be opened,
open the door and exit the
vehicle.



If the door can not be opened,
open the window using the
power window switch and
ensure an escape route.



If the window can be opened,
exit the vehicle through the
window.



If the door and window cannot
be opened due to the rising
water, remain calm, wait until
the water level inside the
vehicle rises to the point that
the water pressure inside of
the vehicle equals the water
pressure outside of the vehi-
cle and then open the door
after waiting for the rising
water to enter the vehicle, and
exit the vehicle. When the

WARNING

■

If the fuel cell system has to

be turned off while driving

Power assist for the steering

wheel will be lost, making the

steering wheel heavier to turn.

Decelerate as much as possible

before turning off the fuel cell sys-

tem.

If the vehicle is sub-

merged or water on

the road is rising

This vehicle is not designed
to be able to drive on roads
that are deeply flooded with
water. Do not drive on roads
where the roads may be
submerged or the water
may be rising. It is danger-
ous to remain in the vehicle,
if it anticipated that the vehi-
cle will be flooded or set a
drift. Remain calm and fol-
low the following.

448

8-1. Essential information

outside water level exceeds
half the height of the door, the
door cannot be opened from
the inside due to water pres-
sure.

■

Water level exceeds the floor

When the water level exceeds the

floor and time has passed, the elec-

trical equipment will get damaged,

the power windows will not operate,

the motor stop, and the vehicle may

not be able to get moving.

■

Using an emergency escape
hammer

Laminated glass is used in the wind-

shield on this vehicle.
Laminated glass cannot be shat-
tered with an emergency hammer

Tempered glass is used in the win-

dows on this vehicle.

: Contact your Toyota dealer or

aftermarket accessory manufac-
turer for further information about
an emergency hammer.

WARNING

■

Caution while driving

Do not drive on roads where the

roads may be submerged or the

water may be rising. Otherwise

the vehicle may be damaged and

cannot move, as well as become

flooded and set a drift, which may

lead to death.

449

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises

8-2.Steps to take in an emergency

If your vehicle needs

to be towed

If towing is necessary, we
recommend having your
vehicle towed by your Toy-
ota dealer or commercial
towing service, using a
wheel-lift type truck or flat-
bed truck.

Use a safety chain system
for all towing, and abide by
all state/provincial and local
laws.

WARNING

Observe the following precau-

tions.

Failure to do so may result in

death or serious injury.

■

When towing the vehicle

Be sure to transport the vehicle

with all four wheels raised off the

ground. If the vehicle is towed

with the tires contacting the

ground, the drivetrain and related

parts may be damaged, an acci-

dent may occur due to a change

in direction of the vehicle or elec-

tricity generated by the operation

of the motor may cause a fire to

occur depending on the nature of

the damage or malfunction.

■

While towing

●

When towing using cables or

chains, avoid sudden starts, etc.

which place excessive stress on

the towing eyelets, cables or

chains. The towing eyelets,

cables or chains may become

damaged, broken debris may hit

people, and cause serious dam-

age.

●

Do not perform any of the fol-

lowing as doing so may cause

the parking lock mechanism to

engage, locking the rear wheels

and possibly leading to an acci-

dent resulting in death or seri-

ous injury:

• Unfasten the driver’s seat belt

and open the driver’s door.

450

8-2. Steps to take in an emergency

In the following situations, it is
not possible to be towed by
another vehicle using cables or
chains, as the rear wheels may
be locked due to the parking
lock. Contact your Toyota dealer
or commercial towing service.



There is a malfunction in the
shift control system. (



P.464)



There is a malfunction in the
immobilizer system. (



P.70)



There is a malfunction in the
smart key system. (



P.482)



The 12-volt battery is dis-
charged. (



P.485)

The following may indicate a
problem with your transmission.
Contact your Toyota dealer or
commercial towing service
before towing.



The fuel cell system warning
message is shown on the
multi-information display and
the vehicle does not move.



The vehicle makes an abnor-
mal sound.



From the front

Use a towing dolly under the

WARNING

• Turn the power switch off.

■

Installing towing eyelets to

the vehicle

Make sure that towing eyelets are

installed securely.

If not securely installed, towing

eyelets may come loose during

towing.

NOTICE

■

To prevent damage to the

vehicle when towing using a

wheel-lift type truck

When raising the vehicle, ensure

adequate ground clearance for

towing at the opposite end of the

raised vehicle. Without adequate

clearance, the vehicle could be

damaged while being towed.

■

To prevent damage to the

vehicle when towing with a

sling-type truck

Do not tow with a sling-type truck,

either from the front or rear.

■

To prevent damage to the

vehicle during emergency

towing

Do not secure cables or chains to

the suspension components.

Situations when it is not
possible to be towed by
another vehicle

Situations when it is nec-
essary to contact dealers
before towing

Towing with a wheel-lift
type truck

451

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises

rear wheels.



From the rear

Use a towing dolly under the
front wheels.

■

Towing with a sling-type truck

Do not tow with a sling-type truck to

prevent body damage.

When using a flatbed truck to
transport the vehicle, use tire
strapping belts. Refer to the
owner’s manual of the flatbed
truck for the tire strapping
method.
In order to suppress vehicle
movement during transporta-
tion, set the parking brake and
turn the power switch off.

If a tow truck is not available in
an emergency, your vehicle may
be temporarily towed using
cables or chains secured to the
emergency towing eyelets. This
should only be attempted on
hard surfaced roads for short
distances at under 18 mph (30
km/h).
A driver must be in the vehicle to
steer and operate the brakes.
The vehicle’s wheels, drive train,
axles, steering and brakes must
be in good condition.

To have your vehicle towed by
another vehicle, the towing eye-
let must be installed to your
vehicle. Install the towing eyelet
using the following procedure.

Take out the screwdriver and
towing eyelet.



Type A

Screwdriver

Towing eyelet

Using a flatbed truck

Emergency towing

Emergency towing proce-
dure

452

8-2. Steps to take in an emergency



Type B

Phillips-head screwdriver

Towing eyelet

Remove the eyelet cover
using a flathead screwdriver.

If the driver is a Phillips-head,

replace it with flathead.
To protect the bodywork, place a

rag between the screwdriver and

the vehicle body as shown in the

illustration.

Insert the towing eyelet into
the hole and tighten partially
by hand.

Tighten down the towing eye-
let securely using a screw-
driver or hard metal bar.

Securely attach cables or
chains to the towing eyelet.

Take care not to damage the vehi-

cle body.

Enter the vehicle being towed
and start the fuel cell system.

If the fuel cell system does not

start, turn the power switch to ON.

Shift the shift position to N
and release the parking
brake.

Turn automatic mode off. (



P.192)

■

While towing

If the fuel cell system is off, the

power assist for the brakes and

steering will not function, making

steering and braking more difficult.

■

Wheel nut wrench

Wheel nut wrench can be pur-

chased at your Toyota dealer.

■

Before transporting or towing in

frozen areas

Operate the water release function.

Otherwise, the fuel cell system may

freeze and the vehicle may not be

able to be started. (



P.196)

453

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises



Fluid leaks under the vehicle.
(Water dripping from the air
conditioning after use is nor-
mal.)



Flat-looking tires or uneven
tire wear



The high coolant temperature
gauge needle continually
points higher than normal.



Hydrogen gas leakage noises
can be heard. (



P.87)



Excessive tire squeal when
cornering



Strange noises related to the
suspension system



Other noises related to the
fuel cell system



Stumbling or running roughly



Appreciable loss of power



Vehicle pulls heavily to one
side when braking



Vehicle pulls heavily to one
side when driving on a level
road



Loss of brake effectiveness,
spongy feeling, pedal almost
touches the floor

If you think something

is wrong

If you notice any of the fol-
lowing symptoms, your
vehicle probably needs
adjustment or repair. Con-
tact your Toyota dealer as
soon as possible.

Visible symptoms

Audible symptoms

Operational symptoms

Toyota Mirai (2023 year). Manual in english - page 27