Toyota Mirai (2023 year). Manual in english - page 30

486

8-2. Steps to take in an emergency

When connecting to an unpainted metallic point

, make the connection

after checking the surrounding area. Also, do not make any connections
where parts nearby may interfere.
Use jumper cables that can reach the specified terminals and connecting

point.

Exclusive jump starting terminal (your vehicle)

Positive (+) battery terminal (second vehicle)

Negative (-) battery terminal (second vehicle)

Metallic point shown in the illustration

Start the engine of the sec-
ond vehicle. Increase the
engine speed slightly and
maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery
of your vehicle.

Open and close any of the
doors of your vehicle with the
power switch off.

Maintain the engine speed of
the second vehicle and start
the fuel cell system of your
vehicle by turning the power
switch to ON.

Make sure the “READY” indi-
cator comes on. If the indica-
tor does not come on, contact
your Toyota dealer.

Once the fuel cell system has
started, remove the jumper
cables in the exact reverse
order from which they were
connected.

Close the exclusive jump

starting terminal cover and
install the fuse box cover.

Once the fuel cell system starts,
have the vehicle inspected at
your Toyota dealer as soon as
possible.

487

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises

■

Starting the fuel cell system

when the 12-volt battery is dis-

charged

The fuel cell system cannot be

started by push-starting.

■

To prevent 12-volt battery dis-

charge

●

Turn off the headlights and the

audio system while the fuel cell

system is off.

●

Turn off any unnecessary electri-

cal components when the vehicle

is running at a low speed for an

extended period, such as in heavy

traffic.

■

When the 12-volt battery is

removed or discharged

●

Information stored in the ECU is

cleared. When the 12-volt battery

is depleted, have the vehicle

inspected at your Toyota dealer.

●

Some systems may require initial-

ization. (



P.526)

●

If the 12-volt battery discharges, it

may not be possible to shift the

shift position to other positions.

In this case, the vehicle cannot be
towed without lifting both rear
wheels because the rear wheels will
be locked.

■

When removing the 12-volt bat-

tery terminals

When the 12-volt battery terminals

are removed, the information stored

in the ECU is cleared. Before

removing the 12-volt battery termi-

nals, contact your Toyota dealer.

■

Charging the 12-volt battery

The electricity stored in the 12-volt

battery will discharge gradually even

when the vehicle is not in use, due

to natural discharge and the drain-

ing effects of certain electrical appli-

ances. If the vehicle is left for a long

time, the 12-volt battery may dis-

charge, and the fuel cell system

may be unable to start. (The 12-volt

battery recharges automatically

while the fuel cell system is operat-

ing.)

■

When recharging or replacing

the 12-volt battery

●

In some cases, it may not be pos-

sible to unlock the doors using the

smart key system when the 12-

volt battery is discharged. Use the

wireless remote control or the

mechanical key to lock or unlock

the doors.

●

The fuel cell system may not start

on the first attempt after the 12-

volt battery has recharged but will

start normally after the second

attempt. This is not a malfunction.

●

The power switch mode is memo-

rized by the vehicle. When the 12-

volt battery is reconnected, the

system will return to the mode it

was in before the 12-volt battery

was discharged. Before discon-

necting the 12-volt battery, turn

the power switch off.

If you are unsure what mode the

power switch was in before the

12-volt battery discharged, be

especially careful when recon-

necting the 12-volt battery.

●

When the 12-volt battery is recon-

nected, start the fuel cell system,

depress the brake pedal, and con-

firm that it is possible to shift into

each shift position.

●

If the battery is removed or the ter-

minals disconnected without oper-

ating the water release function

during cold weather, the vehicle

may not start due to the fuel cell

system being frozen. To prevent

this, operate the water release

function before removing the bat-

tery or disconnecting the termi-

nals. (



P.196)

488

8-2. Steps to take in an emergency

■

When replacing the 12-volt bat-

tery

●

Use a Central Degassing type 12-

volt battery (European Regula-

tions).

●

Use a 12-volt battery with the

same case size as the previous

12-volt battery and an equivalent

20 hour rate capacity (20HR) or

greater.

• If the sizes differ, the 12-volt bat-

tery cannot be properly secured.

• If the 20 hour rate capacity is low,

even if the time period where the

vehicle is not used is a short time,

the 12-volt battery may discharge

and the fuel cell system may not

be able to start.

●

Use a 12-volt battery with a han-

dle. If a 12-volt battery without a

handle is used, removal is more

difficult.

●

After replacing, firmly attach the

following items to the exhaust hole

of the 12-volt battery.

• Use the exhaust hose that was

attached to the 12-volt battery

before replacing and confirm that

it is firmly connected to the hole

section of the vehicle.

• Use the exhaust hole plug

included with the 12-volt battery

replaced or the one installed on

the 12-volt battery prior to the

replacement. (Depending on the

12-volt battery to be replaced, the

exhaust hole may be plugged.)

Exhaust hole plug

Exhaust hole

Exhaust hose

For details, consult your Toyota
dealer.

WARNING

■

When removing the 12-volt

battery terminals

Always remove the negative (-)

terminal first. If the positive (+) ter-

minal contacts any metal in the

surrounding area when the posi-

tive (+) terminal is removed, a

spark may occur, leading to a fire

in addition to electrical shocks

and death or serious injury.

■

Avoiding 12-volt battery fires

or explosions

Observe the following precautions

to prevent accidentally igniting the

flammable gas that may be emit-

ted from the 12-volt battery:

●

Make sure each jumper cable is

connected to the correct termi-

nal and that it is not unintention-

ally in contact with any other

than the intended terminal.

●

Do not allow the other end of

the jumper cable connected to

the “+” terminal to come into

contact with any other parts or

metal surfaces in the area, such

as brackets or unpainted metal.

●

Do not allow the + and - clamps

of the jumper cables to come

into contact with each other.

●

Do not smoke, use matches,

cigarette lighters or allow open

flame near the 12-volt battery.

■

12-volt battery precautions

The 12-volt battery contains poi-

sonous and corrosive acidic elec-

trolyte, while related parts contain

lead and lead compounds.

Observe the following precautions

when handling the 12-volt battery:

489

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises

WARNING

●

When working with the 12-volt

battery, always wear safety

glasses and take care not to

allow any battery fluids (acid) to

come into contact with skin,

clothing or the vehicle body.

●

Do not lean over the 12-volt bat-

tery.

●

In the event that battery fluid

comes into contact with the skin

or eyes, immediately wash the

affected area with water and

seek medical attention. Place a

wet sponge or cloth over the

affected area until medical

attention can be received.

●

Always wash your hands after

handling the 12-volt battery sup-

port, terminals, and other bat-

tery-related parts.

●

Do not allow children near the

12-volt battery.

■

After recharging the 12-volt

battery

Have the 12-volt battery

inspected at your Toyota dealer

as soon as possible.

If the 12-volt battery is deteriorat-

ing, continued use may cause the

12-volt battery to emit a malodor-

ous gas, which may be detrimen-

tal to the health of passengers.

■

When replacing the 12-volt

battery

●

When the vent plug and indica-

tor are close to the hold down

clamp, the battery fluid (sulfuric

acid) may leak.

●

For information regarding 12-

volt battery replacement, con-

tact your Toyota dealer.

●

After replacing, securely attach

the exhaust hose and exhaust

hole plug to the exhaust hole of

the replaced 12-volt battery. If

not properly installed, gases

(hydrogen) may leak into the

vehicle interior, and there is the

possible danger of the gas ignit-

ing and exploding.

NOTICE

■

When handling jumper cables

When connecting the jumper

cables, ensure that they do not

become entangled in the cooling

fan.

■

When connecting jumper

cables

Make sure to connect jumper

cables to the specified terminals

and connecting point. Failure to

do so may adversely affect the

electronic devices or damage to

them.

■

To prevent damaging the

vehicle

The exclusive jump starting termi-

nal is to be used when charging

the 12-volt battery from another

vehicle in an emergency. It cannot

be used to jump start another

vehicle.

490

8-2. Steps to take in an emergency

Label

Fuel cell stack coolant reservoir

Inverter coolant reservoir

If your vehicle overheats

The following may indicate that your vehicle is overheating.



The high coolant temperature warning light (



P.455) comes on

or flashes, or a loss of fuel cell system power is experienced.
(For example, the vehicle speed does not increase.)



The fuel cell system overheat warning light (



P.455) comes on



Steam comes out from under the hood.

Parts name for cooling components

491

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises



If the high coolant tempera-
ture warning light comes on or
flashes

Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the fuel cell system.

If you see steam:
Carefully lift the hood after
the steam subsides.
If you do not see steam:
Carefully lift the hood.

After the fuel cell system has
cooled down sufficiently,
inspect the hoses and radia-

tor core (radiator) for any
leaks.

Electric cooling fan

Fuel cell stack coolant radia-
tor

If a large amount of coolant leaks,
immediately contact your Toyota
dealer.

The fuel cell stack coolant
level is satisfactory if it is
between the “MAX” and
“MIN” lines on the reservoir.

Fuel cell stack coolant reser-
voir

“MAX” line

“MIN” line

If the amount of fuel cell stack
coolant is low:
Immediately contact your Toyota
dealer.

NOTICE

■

Fuel cell stack coolant

The fuel cell stack coolant is

exclusive for fuel cell stack usage.

Damage may occur when water

or any other type of coolant is

used, so never use any other

fluid. If the fuel cell stack coolant

is low, immediately contact your

Toyota dealer.

Correction procedures

492

8-2. Steps to take in an emergency

If the amount of fuel cell stack
coolant is not low:
Have the vehicle inspected at
the nearest Toyota dealer.
Even if the fuel cell stack cool-
ant is low, do not refill it.



If the fuel cell system over-
heat warning light comes on

Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the fuel cell system.

If you see steam or coolant
leaks:
Carefully lift the hood after
the steam subsides.
If you do not see steam or
coolant leaks:
Carefully lift the hood.

After the fuel cell system has
cooled down, inspect the

hoses and radiator core (radi-
ator) for any leaks.

Electric cooling fan

Inverter coolant radiator

If a large amount of coolant leaks,
immediately contact your Toyota
dealer.

The inverter coolant level is
satisfactory if it is between
the “MAX” and “MIN” lines on
the reservoir.

Inverter coolant reservoir

“MAX” line

“MIN” line

Add inverter coolant if neces-
sary.

Water can be used in an emer-

gency if inverter coolant is unavail-

493

8-2. Steps to take in an emergency

Whe

n tr

ouble

rises

able.

Start the fuel cell system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operate and
to check for coolant leaks
from the radiator or hoses.

The fan operate when the air condi-

tioning system is turned on immedi-

ately after a cold start. Confirm that

the fan is operating by checking the

fan sound and air flow. If it is diffi-

cult to check these, turn the air con-

ditioning system on and off

repeatedly.
(The fan may not operate in freez-

ing temperatures.)

If the fan is not operating:
Stop the fuel cell system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.

WARNING

■

When inspecting under the

hood of your vehicle

Observe the following precau-

tions.

Failure to do so may result in seri-

ous injury such as burns.

●

If steam is seen coming from

under the hood, do not open the

hood until the steam has sub-

sided. The fuel cell unit com-

partment may be very hot.

●

Even if fuel cell system has

stopped, the cooling fan may

begin to move suddenly.

Do not touch or approach the

rotating parts of the fan. Doing

so may lead to fingers, clothes

or tools getting caught, resulting

in injury.

●

Do not loosen the coolant reser-

voir caps or radiator cap, while

the fuel cell system and radiator

are hot.

High temperature steam or

coolant could spray out.

NOTICE

■

When inverter coolant

Add coolant slowly after the fuel

cell system has cooled down suffi-

ciently. Adding inverter cool cool-

ant to a hot fuel cell system too

quickly can cause damage to the

fuel cell system.

■

To prevent damage to the

cooling system

Observe the following precau-

tions:

●

Avoid contaminating the coolant

with foreign matter (such as

sand or dust etc.).

●

Do not use any coolant additive

with inverter coolant.

●

For replacement of the fuel cell

stack coolant, contact your Toy-

ota dealer.

●

Do not use water or any other

coolant when refilling the fuel

cell stack coolant. Also, do not

use any additive agents for the

coolant.

494

8-2. Steps to take in an emergency

Set the parking brake and
stop the fuel cell system.

Remove the mud, snow or
sand from around the rear
wheels.

Place wood, stones or some
other material under the rear
wheels to help provide trac-
tion.

Restart the fuel cell system.

Shift the shift position to D or
R and release the parking
brake. Then, while exercising
caution, depress the acceler-
ator pedal.

■

When it is difficult to free the

vehicle

Press the

switch to turn off

TRAC.

“Traction Control Turned Off”

If the vehicle becomes

stuck

Carry out the following pro-
cedures if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:

Recovering procedure

WARNING

■

When attempting to free a

stuck vehicle

If you choose to push the vehicle

back and forth to free it, make

sure the surrounding area is clear

to avoid striking other vehicles,

objects or people. The vehicle

may also lunge forward or lunge

back suddenly as it becomes free.

Use extreme caution.

■

When shifting the shift posi-

tion

Be careful not to shift the shift

position with the accelerator pedal

depressed.

This may lead to unexpected

rapid acceleration of the vehicle

that may cause an accident

resulting in death or serious injury.

NOTICE

■

To avoid damaging the trans-

mission and other compo-

nents

●

Avoid spinning the rear wheels

and depressing the accelerator

pedal more than necessary.

●

If the vehicle remains stuck

even after these procedures are

performed, the vehicle may

require towing to be freed.

495

Vehicle

specifications

Vehicle specifications

9-1. Specifications

Maintenance data (fuel, fluid

level, etc.)..................

496

Tire information ...........

502

9-2. Customization

Customizable features

512

9-3. Initialization

Items to initialize .........

526

496

9-1. Specifications

9-1.Specifications

:Unladen vehicles

:Vehicles without electronic sunshade

:Vehicles with electronic sunshade

■

Vehicle identification num-
ber

The vehicle identification num-
ber (VIN) is the legal identifier
for your vehicle. This is the pri-
mary identification number for
your Toyota. It is used in regis-
tering the ownership of your
vehicle.
This number is stamped on the
top left of the instrument panel.

This number is also stamped
under the right-hand front seat.

Maintenance data (fuel, fluid level, etc.)

Dimensions and weight

Overall length

195.9 in. (4975 mm)

Overall width

74.2 in. (1885 mm)

Overall height

57.9 in. (1470 mm)

58.3 in. (1480 mm)

Wheelbase

115.0 in. (2920 mm)

Tread

Front

63.4 in. (1610 mm)

Rear

63.2 in. (1605 mm)

Vehicle capacity weight
(Occupants + luggage)

835 lb. (380 kg)

Seating capacity

Seating capacity

5 (Front 2, Rear 3)

Vehicle identification

497

9-1. Specifications

Vehicle

specifications

This number is also on the Certi-

fication Label.

:H2 quality standard:

EN 17124 (European standard for EU27 countries)
ISO 14687 Grade D (European standard)
SAE J2719 (US standard)

:This is the maximum possible fill amount. The actual fuel amount

achieved at hydrogen stations may be different due to station capacity or
station settings.

:For models of JPD20L-CEDSSA

and JPD20L-CEDHSA

:For models of JPD20L-CEDBSA

:The model code is indicated on the manufacturer’s plate or label.

(



P.496)

Fuel

Fuel type

Compressed hydrogen gas

Nominal working pressure

10150 psi (70 MPa, 714 kgf/cm

, 700

bar)

Hydrogen tanks’ fuel capacity (Refer-
ence)



37.5 gal. (142.2 L, 31.2 Imp.gal.)
(Approximately 12.6 lb. [5.7
kg.]

)



30.8 gal. (116.9 L, 25.7 Imp.gal.)
(Approximately 10.4 lb. [4.7
kg.]

)

498

9-1. Specifications

Electric motor (traction motor)

Type

Permanent magnet synchronous
motor

Maximum output

134 kW

Maximum torque

221.3 ft•lbf (300 N•m, 30.6 kgf•m)

Traction battery

Type

Lithium-ion battery

Voltage

3.7 V/cell

Capacity

4.0 Ah

Quantity

84 cells

Nominal voltage

310.8 V

Cooling system

Capacity

Fuel cell
stack

17.3 qt. (16.4 L, 14.4 Imp. qt.)

Inverter

4.2 qt. (4.0 L, 3.5 Imp. qt.)

499

9-1. Specifications

Vehicle

specifications

: The fluid capacity is a reference quantity.

If replacement is necessary, contact your Toyota dealer.

Coolant
type

Fuel cell
stack

“Toyota Genuine FC Stack Coolant”



In order to safely cool the fuel cell stack, which
is at high voltages, the fuel cell stack coolant is
an exclusive high insulation product.



Never use water or other kinds of coolants as
they will cause damage.



Coolant changes are unnecessary.



Do not reuse coolant that has been removed
from the radiator.



Coolant is colorless.



Consult your Toyota dealer about replenishing
or changing the fuel cell stack coolant.

Inverter

Use either of the following:



“Toyota Super Long Life Coolant”



Similar high-quality ethylene glycol-based non-
silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology

Do not use plain water alone.

NOTICE

■

Fuel cell stack coolant

The fuel cell stack coolant is exclusive for fuel cell stack usage. Damage

may occur when water or any other type of coolant is used, so never use

any other fluid.

If the fuel cell stack coolant is low, immediately contact your Toyota dealer.

500

9-1. Specifications

: The fluid capacity is a reference quantity.

If replacement is necessary, contact your Toyota dealer.

:Minimum pedal clearance when depressed with a force of 112 lbf (500 N,

51 kgf) while the fuel cell system is operating.
When performing the brake pedal inspection, also be sure to check that

Electrical system (12-volt battery)

Open voltage at 68°F (20°C):

12.0 V or higher
(Turn the power switch off and turn on the
high beam headlights for 30 seconds.)

Charging rates
Quick charge
Slow charge

15 A max.
5 A max.

Transmission

Fluid capacity

5.9 qt. (5.6 L, 4.9 Imp. qt.)

Fluid type

Toyota Genuine ATF WS

NOTICE

■

Transmission fluid type

Using transmission fluid other than the above type may cause abnormal

noise or vibration, or damage the transmission of your vehicle.

Brakes

Pedal clearance

4.0 in. (102 mm) Min.

Pedal free play

0.04



0.24 in. (1



6 mm)

Brake pad wear limit

0.04 in. (1 mm)

Parking brake lining wear limit 0.04 in. (1 mm)

Parking brake indicator

When pulling the parking brake switch for
1 to 2 seconds: comes on
When pushing the parking brake switch for
1 to 2 seconds: turns off

Fluid type

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

501

9-1. Specifications

Vehicle

specifications

the brake system warning light is not illuminated when the fuel cell sys-
tem is operating. (If the brake system warning light is illuminated, refer to
P.454.)

:Make sure to confirm that the brake warning light (yellow) does not illumi-

nate. (If the brake warning light illuminates, refer to P.454.)



19-inch tires



20-inch tires

Steering

Free play

Less than 1.2 in. (30 mm)

Tires and wheels

Tire size

235/55R19 101V

Tire inflation pressure
(Recommended cold tire
inflation pressure)

Front: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Rear: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Wheel size



Wheel nut torque

103 ft•lbf (140 N•m, 14.3 kgf•m)

Tire size

245/45ZR20 103Y

Tire inflation pressure
(Recommended cold tire
inflation pressure)

Front: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Rear: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Wheel size



8 1/2J

Wheel nut torque

103 ft•lbf (140 N•m, 14.3 kgf•m)

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