Toyota Mirai (2022 year). Manual in english — page 24
387
7-2. Maintenance
7
Maintena
nce
a
nd ca
re
7-2.Maintenance
■
Repair and replacement
It is recommended that genuine
Toyota parts be used for repairs to
ensure performance of each sys-
tem. If non-Toyota parts are used in
replacement or if a repair shop other
than a Toyota dealer performs
repairs, confirm the warranty cover-
age.
■
Allow inspection and repairs to
be performed by a Toyota
dealer
●
Toyota technicians are well-
trained specialists and are kept up
to date with the latest service
information. They are well
informed about the operation of all
systems on your vehicle.
●
Keep a copy of the repair order. It
proves that the maintenance that
has been performed is under war-
ranty coverage. If any problem
should arise while your vehicle is
under warranty, your Toyota
dealer will promptly take care of it.
General maintenance should be
performed on a daily basis. This
can be done by yourself or by a
Toyota dealer.
Scheduled maintenance should
be performed at specified inter-
vals according to the mainte-
nance schedule.
For details about maintenance
items and schedules, refer to the
“Scheduled Maintenance Guide” or
“Owner’s Manual Supplement”.
You can perform some mainte-
nance procedures by yourself.
Please be aware that do-it-your-
self maintenance may affect
Maintenance require-
ments
To ensure safe and econom-
ical driving, day-to-day care
and regular maintenance
are essential. It is the
owner’s responsibility to
perform regular checks.
Toyota recommends the
maintenance below.
WARNING
■
If your vehicle is not properly
maintained
Improper maintenance could
result in serious damage to the
vehicle and possible death or seri-
ous injury.
■
Handling of the 12-volt bat-
tery
●
Oils, fuels and fluids contained
in vehicles as well as waste pro-
duced by component wear con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects or
other reproductive harm. Avoid
exposure and wash any
affected area immediately.
●
12-volt battery posts, terminals
and related accessories con-
tain lead and lead compounds
which are known to cause brain
damage. Wash your hands after
handling. (
General maintenance
Scheduled maintenance
Do-it-yourself mainte-
nance
388
7-2. Maintenance
warranty coverage.
The use of Toyota repair manuals is
recommended.
For details about warranty cover-
age, refer to the separate “Owner’s
Warranty Information Booklet” or
“Owner’s Manual Supplement”.
General maintenance
Listed below are the general
maintenance items that
should be performed at the
intervals specified in the
“Owner’s Warranty Informa-
tion Booklet” or “Owner’s
Manual Supplement/Sched-
uled Maintenance Guide”. It
is recommended that any
problem you notice should
be brought to the attention
of your Toyota dealer or
qualified service shop for
advice.
WARNING
■
If the fuel cell system is oper-
ating
Turn the fuel cell system off and
ensure that there is adequate
ventilation before performing
maintenance checks.
Fuel cell unit compart-
ment
Items
Check points
Brake fluid
Is the brake fluid at
the correct level?
(
Coolant
Is the coolant at
the correct level?
(
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Radiator/con-
denser
The radiator and
condenser should
be free from for-
eign objects.
(
Washer fluid
Is there sufficient
washer fluid?
(
Trunk
Items
Check points
12-volt battery
Check the connec-
tions. (
Vehicle interior
Items
Check points
Accelerator
pedal
• The accelerator
pedal should
move smoothly
(without uneven
pedal effort or
catching).
Transmission
“Park” mecha-
nism
• When parked on
a slope and the
shift position is in
P, is the vehicle
securely
stopped?
Items
Check points
Brake pedal
• Does the brake
pedal move
smoothly?
• Does the brake
pedal have
appropriate
clearance from
the floor?
• Does the brake
pedal have the
correct amount
of free play?
Brakes
• The vehicle
should not pull to
one side when
the brakes are
applied.
• The brakes
should work
effectively.
• The brake pedal
should not feel
spongy.
• The brake pedal
should not get
too close to the
floor when the
brakes are
applied.
Head
restraints
• Do the head
restraints move
smoothly and
lock securely?
Indica-
tors/buzzers
• Do the indica-
tors and buzzers
function prop-
erly?
Lights
• Do all the lights
come on?
Items
Check points
390
7-2. Maintenance
Parking brake
• Does the park-
ing brake oper-
ate normally?
• When parked on
a slope and the
parking brake is
on, is the vehicle
securely
stopped?
Seat belts
• Do the seat belts
operate
smoothly?
• The seat belts
should not be
damaged.
Seats
• Do the seat con-
trols operate
properly?
Steering wheel
• Does the steer-
ing wheel rotate
smoothly?
• Does the steer-
ing wheel have
the correct
amount of free
play?
• There should not
be any strange
sounds coming
from the steer-
ing wheel.
Items
Check points
Vehicle exterior
Items
Check points
Doors/trunk
• Do the
doors/trunk oper-
ate smoothly?
Hood
• Does the hood
lock system work
properly?
Fluid leaks
• There should not
be any signs of
fluid leakage
after the vehicle
has been parked.
Tires
• Is the tire infla-
tion pressure
correct?
• The tires should
not be damaged
or excessively
worn.
• Have the tires
been rotated
according to the
maintenance
schedule?
• The wheel nuts
should not be
loose.
Windshield
wipers
• The wiper blades
should not show
any signs of
cracking, split-
ting, wear, con-
tamination or
deformation.
• The wiper blades
should clear the
windshield with-
out streaking or
skipping.
391
7-3. Do-it-yourself maintenance
7
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7-3.Do-it-yourself maintenance
Do-it-yourself service
precautions
If you perform maintenance
by yourself, be sure to fol-
low the correct procedure
as given in these sections.
Maintenance
Items
Parts and tools
12-volt battery
condition
(
• Grease
• Conventional
wrench (for ter-
minal clamp
bolts)
Brake fluid
level (
• FMVSS No.116
DOT 3 or SAE
J1703 brake fluid
FMVSS No.116
DOT 4 or SAE
J1704 brake fluid
• Rag or paper
towel
• Funnel (used
only for adding
brake fluid)
Inverter cool-
ant level
(
• “Toyota Super
Long Life Cool-
ant” or a similar
high quality eth-
ylene glycol-
based non-sili-
cate, non-amine,
non-nitrite and
non-borate cool-
ant with long-life
hybrid organic
acid technology
For the U.S.A.:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 50% cool-
ant and 50%
deionized water.
For Canada:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 55% cool-
ant and 45%
deionized water.
• Funnel (used
only for adding
coolant)
Fuses
(
• Fuse with same
amperage rating
as original
• Flathead screw-
driver
Headlight aim
(
• Phillips-head
screwdriver
Radiator and
condenser
(
Items
Parts and tools
392
7-3. Do-it-yourself maintenance
Tire inflation
pressure
(
• Tire pressure
gauge
• Compressed air
source
Washer fluid
(
• Water or washer
fluid containing
antifreeze (for
winter use)
• Funnel (used
only for adding
water or washer
fluid)
WARNING
The fuel cell unit compartment
contains many mechanisms and
fluids that may move suddenly,
become hot, or become electri-
cally energized. To avoid death or
serious injury, observe the follow-
ing precautions.
■
When working on the fuel cell
unit compartment
●
Be careful not to touch the high-
voltage parts or hydrogen-
related parts.
●
Make sure that the “READY”
indicator is off.
●
Keep hands, clothing and tools
away from the moving fan.
●
Be careful not to touch the
motor, inverter, radiator, etc.
right after driving as they may
be hot. Coolant and other fluids
may also be hot.
●
Do not leave anything that may
burn easily, such as paper and
rags, in the fuel cell unit com-
partment.
Items
Parts and tools
●
Do not smoke, cause sparks or
expose an open flame to the 12-
volt battery. 12-volt battery
fumes are flammable.
●
Be extremely cautious when
working on the 12-volt battery. It
contains poisonous and corro-
sive sulfuric acid.
●
Take care because brake fluid
can harm your hands or eyes
and damage painted surfaces. If
fluid gets on your hands or in
your eyes, flush the affected
area with clean water immedi-
ately.
If you still experience discom-
fort, consult a doctor.
●
Never touch, disassemble,
remove or replace the high-volt-
age parts, cables and their con-
nectors. It can cause severe
burns or electric shock that may
result in death or serious injury.
■
When working near the elec-
tric cooling fan or radiator
grille
Be sure the power switch is off.
With the power switch in ON, the
electric cooling fan may automati-
cally start to run if the air condi-
tioning is on and/or the coolant
temperature is high. (
■
Safety glasses
Wear safety glasses to prevent
flying or falling material, fluid
spray, etc. from getting in your
eyes.
NOTICE
■
If you remove the air cleaner
filter
Driving with the air cleaner filter
removed may cause excessive
motor wear due to dirt in the air.
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7-3. Do-it-yourself maintenance
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1
Pull the hood lock release
lever.
The hood will pop up slightly.
2
Pull up the auxiliary catch
lever and lift the hood.
■
Front
Hood
Opening the hood
WARNING
■
Pre-driving check
Check that the hood is fully closed
and locked.
If the hood is not locked properly,
it may open while the vehicle is in
motion and cause an accident,
which may result in death or seri-
ous injury.
Positioning a floor
jack
When using a floor jack, fol-
low the instructions in the
manual provided with the
jack and perform the opera-
tion safely.
When raising your vehicle
with a floor jack, position
the jack correctly. Improper
placement may damage
your vehicle or cause injury.
Location of the jack point
394
7-3. Do-it-yourself maintenance
■
Rear
WARNING
■
When raising your vehicle
Make sure to observe the follow-
ing precautions to reduce the pos-
sibility of death or serious injury:
●
Make sure to set the floor jack
properly at the jack point.
Raising the vehicle with an
improperly positioned floor jack
will damage the vehicle and may
cause the vehicle to fall off the
floor jack.
●
Do not jack up on the hydrogen
tanks nor the rear suspension.
Type A
Type B
Front
Suspension
Hydrogen tanks
395
7-3. Do-it-yourself maintenance
7
Maintena
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Inverter coolant reservoir (
Fuel cell stack coolant reservoir (
Fuse boxes (
Brake fluid reservoir (
Washer fluid tank (
Inverter coolant radiator (
Electric cooling fan
Condenser (
Fuel cell stack coolant radiator (
■
12-volt battery
Fuel cell unit compartment
Components
396
7-3. Do-it-yourself maintenance
■
Removing the fuel cell unit compartment cover
Outside
Front
■
Installing the clips
1
Push up center portion
2
Insert
3
Press
■
Removing the fuel cell
stack cover
Remove the fuel cell stack
cover.
Fuel cell unit compartment cover
NOTICE
■
Checking the fuel cell unit
compartment cover after
installation
Make sure that the cover is
securely installed in its original
position.
Fuel cell stack cover
397
7-3. Do-it-yourself maintenance
7
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■
Installing the fuel cell stack
cover
Install the fuel cell stack cover.
1
Attach the hooks on the rear
side of the fuel cell stack
cover.
2
Insert the front side of the
fuel cell stack cover on the
pins.
The coolant level is satisfactory
if it is between the “MAX” and
“MIN” lines on the reservoir
when the fuel cell system is
cold.
Fuel cell stack reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line. (
The coolant level is satisfactory
if it is between the “MAX” and
“MIN” lines on the reservoir
when the fuel cell system is
cold.
NOTICE
■
Checking the fuel cell stack
cover after installation
Make sure that the cover is
securely installed in its original
position.
Checking the fuel cell
stack coolant
NOTICE
■
Fuel cell stack coolant
An exclusive coolant for the fuel
cell system is filled in the fuel cell
stack coolant reservoir. Do not
use any substitute. It may dam-
age your vehicle.
Checking the inverter
coolant
398
7-3. Do-it-yourself maintenance
Inverter coolant reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line. (
■
Inverter 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 inverter coolant level
drops within a short time of
replenishing
Visually check the radiators, hoses,
inverter coolant reservoir cap, 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 cell system is hot
Do not remove the coolant reser-
voir 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 fuel cell system is
hot
Do not touch the radiator or con-
denser as they may be hot and
cause serious injuries, such as
burns.
399
7-3. Do-it-yourself maintenance
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■
Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
Brake fluid reservoir cap
“MAX” line
“MIN” line
■
Adding fluid
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.
If any washer does not work or
the warning message appears
on the multi-information display,
the washer tank may be empty.
Add washer 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.
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.
Adding the washer fluid
400
7-3. Do-it-yourself maintenance
The 12-volt battery is located in
the right-hand side of the trunk.
Remove the luggage mat:
■
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 charger is off when
connecting and disconnecting the
charger cables to the 12-volt bat-
tery.
■
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 fuel cell system with the
power switch in ACC. The fuel cell
system may not start with the
power switch turned off. However,
the fuel cell system will operate
normally from the second attempt.
WARNING
■
When adding washer fluid
Do not add washer fluid when the
fuel cell system is hot or operating
as washer fluid contains alcohol
and may catch fire if spilled on the
fuel cell system, etc.
NOTICE
■
Do not use any fluid other
than washer fluid
Do not use soapy water or anti-
freeze 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.
12-volt battery
Location
401
7-3. Do-it-yourself maintenance
7
Maintena
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●
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 switch before discon-
necting the 12-volt battery. Take
extra care when connecting the
12-volt battery if the power switch
mode prior to discharge is
unknown.
●
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 system will not start even after
multiple attempts, contact your Toy-
ota dealer.
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.
●
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 replacing the 12-volt
battery
Use a 12-volt battery designed for
this vehicle. Failure to do so may
cause gas (hydrogen) to enter the
passenger compartment, causing
a fire or explosion.
For replacement of the 12-volt
battery, contact your Toyota
dealer.
402
7-3. Do-it-yourself maintenance
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
Check the 12-volt battery condi-
tion by indicator color.
Blue: Good condition
Red: Charging is necessary.
Have the vehicle inspected
by your Toyota dealer.
Clear: Replacement is nec-
essary.
Have the 12-volt battery
checked by your Toyota
dealer.
NOTICE
■
When recharging the 12-volt
battery
Never recharge the 12-volt bat-
tery while the fuel cell system is
operating. Also, be sure all acces-
sories are turned off.
Exterior
Checking the 12-volt bat-
tery condition
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