TOYOTA MIRAI 2022 Owners Manual

4217-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
7
Maintenance and care
If dust and clogs cannot be com-
pletely removed with the air
intake vent cover installed,
remove the cover and clean the
filter.
1 Remove the grille.
2 Remove the filter.
3 Remove any dust and clogs
from the filter using a vacuum
cleaner, etc.
Make sure to also remove dust and
clogs from the inne r side of the air
intake vent grille.
If the filter is damaged, have it replaced by your Toyota dealer.
4
Reinstall the filter to the grille.
5 Install the grille.
■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 Infor-
mation Booklet” or “Owner’s Manual
Supplement”.
If dust and clogs cannot
be completely removed

4227-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
■Cleaning the air intake vents
●Dust in the air intake vents may
interfere with the cooling of the
traction battery. If charging/dis-
charging of the traction battery
becomes limited, the distance that
the vehicle can be driven using
the electric motor may be reduced
and the fuel economy may be
reduced. Inspect and clean the air
intake vents periodically.
●Improper handling of the air intake
vent covers and filters may result
in damage to the m. If you have
any concerns about cleaning the
filter, contact you r Toyota dealer.
■If “Maintenance Required for
Traction Battery Cooling Parts
See Owner’s Manual” is shown
on the multi-information display
●If this warning message is shown
on the multi-information display,
remove the air inta ke vent covers
and clean the filters. ( P.453)
●After cleaning the air intake vents,
start the fuel cell system and
check that the warning message
is no longer shown.
It may take approximately 20 min-
utes after the fuel cell system is
started until the warning message
disappears. If the warning message
does not disappear, have the vehi-
cle inspected by your Toyota dealer.
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 su re to turn the
power switch off to stop the fuel
cell system.
■When removing the air intake
vent covers
Do not touch the service plug
located near the air intake vents.
(  P. 7 9 )
NOTICE
■When cleaning the air intake
vents
When cleaning the air intake
vents, make sure to only use a
vacuum to suck out dust and
clogs. If a comp ressed air blow
gun, etc. is used to blow out dust
and clogs, the dust or clogs may
be pushed into the air intake
vents, which may affect the per-
formance of the traction battery
and cause a malfunction.
■To prevent damage to the
vehicle
●Do not allow wa ter or foreign
matter to enter the air intake
vent when the cover is
removed.
●Carefully handle the removed
filter so that i t will not be dam-
aged. If the filter is damaged,
have it replaced with a new filter
by your Toyota dealer.
●Make sure to reinstall the filter
and cover to their original posi-
tions after cleaning.
●Do not install anything to the air
intake vent other than the exclu-
sive filter for this vehicle or use
the vehicle witho ut the filter
installed.

4237-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
7
Maintenance and care
■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
■If “Maintenance Required for
Traction Battery Cooling
Parts See Owner’s Manual” is
shown on the multi-informa-
tion display
If the vehicle is continuously
driven with the warning message
(indicating that charging/discharg-
ing of the traction battery may
become limited) displayed, the
traction battery may malfunction.
If the warning message is dis-
played, clean the air intake vents
immediately.
Electronic key batter y
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

4247-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
1Take out the mechanical key.
2 Remove the cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a tape.
3Remove the depleted battery.
Insert a new battery with the “+” ter-
minal facing up.
Replacing the batteryWARNING
■Removed battery and other
parts
These parts are small and if swal-
lowed by a child, they can cause
choking. Keep away from chil-
dren. Failure to do so could result
in death or serious injury.
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.

4257-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
7
Maintenance and care
1 Turn the power switch off.
2 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.396) and push the
tabs in and lift the lid off.
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.
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

4267-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_enRemove the footwe
ll lights connec-
tor.
Remove the lid.
Make sure to push the claw when
removing/installing the lid.
Trunk
Remove the luggage mat
(  P.352), 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.

4277-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
7
Maintenance and care
3 Remove the fuse with the
pullout tool.
Only type A fuse can be
removed using the pullout
tool.
4 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.
Ty p e A
Normal fuse Blown fuse
Type B
Normal fuse
Blown fuse
Type CNormal fuse
Blown fuse
Type DNormal fuse
Blown fuse

4287-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
■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.
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.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.
Headlight aim
Vertical movement adjust-
ing bolts
Before checking the head-
light aim

4297-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en
7
Maintenance and care
1 Using a Phillips-head screw-
driver, turn bolt A in either
direction.
Remember the turning direc-
tion and the number of turns.
2 Turn bolt B the same number
of turns and in the same
direction as step 1.
If the headlight cannot be adjusted
using this procedure, take the vehi-
cle to your Toyota dealer to adjust
the headlight aim.
■LED Lights
The lights consist of a number of
LEDs. If any of t he 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 t he headlight lens
does not indicate a malfunction.
Contact your Toyota dealer for more
information in t he following situa-
tions:
●Large drops of water have built up
on the inside of the lens.
●Water has built up inside the
headlight.
Adjusting the headlight
aimLight bulbs
If any lights burn out, have it
replaced by your Toyota
dealer.

4307-3. Do-it-yourself maintenance
Owners Manual_USA_M62084_en