2023 TOYOTA MIRAI fuse

4417-3. Do-it-yourself maintenance
Owners Manual_USA_M62064_en
7
Maintenance and care
Blown fuse
Type B Normal fuse
Blown fuse
Type CNormal fuse
Blown fuse
Type DNormal fuse
Blown fuse
■After a fuse is replaced
●When installing the lid, make sure
that the tab is ins talled 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 ove rload 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.

4808-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
One of the following may be the
cause of the problem:
The electronic key may not be
functioning properly.
( P.482)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle.
 The fuel door may be open.
( P.212)
 There may be a malfunction
in the immobilizer system.
( P. 7 0 )
 There may be a malfunction
in the shift control system.
*
( P.183, 465)
 The fuel cell system may be
malfunctioning due to an elec-
trical problem such as elec-
tronic key battery depletion or
a blown fuse. However, depending on the type of mal-
function, an interim measure
is available to start the fuel
cell system. (
P.481)
 There is a possibility that the
temperature of the traction
battery is extremely low
(approximately below -22˚F [-
30˚C]). ( P.85, 180)
 It is possible the fuel cell sys-
tem is frozen. ( P.180)
*: It may not be possible to shift the
shift position from P.
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. ( P.485)
 The 12-volt battery terminal
connections may be loose or
corroded. ( P.413)
One of the following may be the
cause of the problem:
 One or both of the 12-volt bat-
tery terminals may be discon-
nected. ( P.413)
If the fuel cell system
will not start
Reasons for the fuel cell
system not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The fuel cell system will
not start even though the
correct starting procedure
is being followed.
( P.180)
The interior lights and
headlights are dim, or the
horn does not sound or
sounds at a low volume.
The interior lights and
headlights do not turn on,
or the horn does not
sound.

4858-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
If you have a set of jumper (or
booster) cables and a second
vehicle with a 12-volt battery,
you can jump start your vehicle
by following the steps below.
1 Confirm that the electronic
key is being carried.
When connecting the jumper (or
booster) cables, depending on the
situation, the ala rm may activate and doors locked. (
P. 7 2 )
2 Open the hood. Remove the
fuse box cover. ( P.406)
Push the tabs in and lift the lid off.
3 Open the exclusive jump
starting terminal cover.
4 Connect a positive jumper cabl e clamp to on your vehicle and
connect the clamp on the other end of the positive cable to on
the second vehicle. Then, connect a negative cable clamp to
on the second vehicle and connect the clamp at the other end of
the negative cable to .
If the 12-volt batter y is
discharged
The following procedures
may be used to start the fuel
cell system if the 12-volt
battery is discharged.
You can also call your Toy-
ota dealer or a qualified
repair shop.
Restarting the fuel cell
system

4868-2. Steps to take in an emergency
Owners Manual_USA_M62064_enWhen connecting to an unpaint
ed metallic point , make the connection
after checking the surrounding a rea. 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 term inal (second vehicle)
Metallic point shown in the illustration
5 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.
6 Open and close any of the
doors of your vehicle with the
power switch off.
7 Maintain the engine speed of
the second vehicle and start
the fuel cell system of your
vehicle by turning the power
switch to ON. 8
Make sure the “READY” indi-
cator comes on. If the indica-
tor does not come on, contact
your Toyota dealer.
9 Once the fuel cell system has
started, remove the jumper
cables in the exact reverse
order from which they were
connected.
10Close 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.

548Alphabetical Index
Owners Manual_USA_M62064_en
Fuel cell unit compartment cover ............................................... 409
Fuel consumption Average fuel economy ......... 107
Current fuel economy ........... 107
Fuel door ........................... ...... 210
Refueling .............................. 210
When the fuel door cannot be opened ............................... 482
Fuel economy ......... ................ 107
Fuel gauge ........................ 99, 102
Fuses ....................................... 438
G
Garage door opener ............... 382
Gauges .............................. 99, 102
Glove box ................................ 358
Glove box light ....................... 359
H
Head restraints ....................... 145
Head-up display ..................... 114 Driving information display area........................................... 114
Driving support system display area .................................... 117
Fuel cell System Indicator .... 118
HUD (Head-up display) switch ........................................... 116
Navigation system-linked display ........................................... 114
Outside temperature ............ 114
Pop-up display ..................... 117
Settings ................................ 116
Headlights Automatic High Beam .......... 200
Light switch .......................... 198
Replacing light bulbs ............ 443
Heated steering wheel ........... 351 Heaters
Automatic air conditioning sys-tem .............................333, 340
Heated steering wheel..........351
Outside rear view mirrors ...335, 342
Seat heaters ....... ..................351
High mounted stoplight Replacing light bulbs ............443
High-voltage components .......81
Hill-start assist control...........322
Hood ........................................406 Open.....................................406
Pop Up Hood ..........................43
Hooks Coat hooks ...........................372
Retaining hooks (floor mat) ....26
Horn .........................................148
HUD (Head-up display) switch ............................................... 116
Hydrogen detecto rs..................84
Hydrogen tanks ............76, 81, 83 Capacity ...............................497
Location ............................76, 81
Hydrogen-related components81
I
Identification Vehicle ..................................496
Ignition switch (power switch) ...............................................180
Immobilizer system ..................70
Indicators ..................................97
Initialization Electronic sunshade .............363
Items to initialize ...................526
Power windows ....................162
Tire pressure w arning system
...........................................420
Inside door handle lights .......355
Inside rear view m irror ...........149

552Alphabetical Index
Owners Manual_USA_M62064_en
Pre-Collision System (PCS)... 219 Enabling/disabling the system........................................... 222
Function ............................... 219
Warning light ........................ 456
R
Radar cruise control (dynamic radar cruise control with full-
speed range) ......................... 244
Radiator ................................... 411
RCD (Rear Camera Detection) ............................................... 277Enabling/disabling the system ........................................... 278
Warning message ................ 279
RCTA (Rear Cross Traffic Alert) ............................................... 272Enabling/disabling the system ........................................... 273
Warning lights....................... 458
Warning message ................ 273
Rear automatic air conditioning system ................................... 349
Rear Camera Detection (RCD) ............................................... 277Enabling/disabling the system ........................................... 278
Warning message ................ 279
Rear Cross Traffic Alert (RCTA) ............................................... 272Enabling/disabling the system ........................................... 273
Warning lights....................... 458
Warning message ................ 273
Rear door sunshades ............ 380
Rear footwell lights ................ 355
Rear seats Cleaning ............................... 396
Head restraints ..................... 145
Seat heaters ......................... 351
Seat ventilators .................... 351 Rear side marker lights
Light switch...........................198
Replacing light bulbs ............443
Rear sunshade ........................381
Rear turn signal lights............190 Replacing light bulbs ............443
Turn signal lever ...................190
Rear view mirror Digital Rear-view Mirror ........150
Inside rear view mirror ..........149
Outside rear view mirrors .....160
Rear window defogger ...335, 342
Refueling ............ .....................210
Capacity ...............................497
Fuel types .............................497
When the fuel door cannot be opened ...............................482
Regenerative braking ...............78 Warning lights .......................454
Replacing Electronic key battery ...........436
Fuses....................................438
Light bulbs ............................443
Tires......................................424
Road accident cautions ...........88
Road Sign Assist ....................241
Roof film ..................................393
RSA (Road Sign Assist) .........241
Running out of fuel...................83
S
Safety Connect .........................65
Seat belt reminder light..460, 461
Seat belt shoulder anchor height
Adjustment .............................32
Seat belts...................................29 Active Assist ...........................33
Adjusting the seat belt shoulder anchor height........................32
Automatic Locking Retractor (ALR) ....................................31