2023 TOYOTA MIRAI air conditioning

4337-3. Do-it-yourself maintenance
Owners Manual_USA_M62064_en
7
Maintenance and care
areas with heavy traffic flow, early
replacement may be required. (For
scheduled maintenance information,
please refer to the “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement”.)
■If air flow from the vents
decreases dramatically
The filter may be clogged. Check
the filter and replace if necessary.
■Air conditioning filter with
deodorizing function
When fragrances are placed in your
vehicle, the deodorizing effect may
become significantly weakened in a
short period.
When an air conditioning odor
comes out continuously, replace the
air conditioning filter.
■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 Information Booklet” or
“Owner’s Manual Supplement”.
■Cleaning the air intake vents
Improper handling of the air intake
vent covers and filt ers may result in
damage to them. If you have any
concerns about cleaning the filter,
contact your Toyota dealer.
NOTICE
■When using the air condition-
ing system
Make sure that a filter is always
installed.
Using the air conditioning system
without a filter may cause damage
to the system.
■To prevent damage to the fil-
ter cover
When moving the filter cover in
the direction of arrow to release
the fitting, pay attention not to
apply excessive force to the
claws. Otherwise, the claws may
be damaged.
Cleaning the traction
batter y air intake
vents
To prevent the fuel economy
from being affected, visually
inspect the traction battery
air intake vents periodically
for clogs. If it is dusty or
clogged or if “Maintenance
Required for Traction Bat-
tery Cooling Parts See
Owner’s Manual” is shown
on the multi-information
display, clean the air intake
vents using the following
procedures:

4538-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
 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

4938-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
able.
6 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 s tart. 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 o perate in freez-
ing temperatures.)
7 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 radia tor 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.

5069-1. Specifications
Owners Manual_USA_M62064_enWarning: The temperature grades
of a tire assume that it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than
1 mile or 1.5 km
under that condition
Maximum inflation pressure
The maximum cold inf lated pressure to
which a tire may be inflated, shown on the
sidewall of the tire
Recommended inflation pres-
sureCold tire inflation pressure recommended
by a manufacturer
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
transmission, power steering, power
brakes, power windows, power seats,
radio and heater, to the extent that these
items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a moto r vehicle with stan-
dard equipment, including the maximum
capacity of fuel, oil and coolant, and if so
equipped, air conditioning and additional
weight optional engine
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occu-
pants specified in the second column of
Ta b l e 1
* that follows

5239-2. Customization
Owners Manual_USA_M62064_en
9
Vehicle specifications
*: If equipped
■Automatic air conditioning system ( P.333, 340)
■Seat heater*/seat ventilators* ( P.351)
*: If equipped
Park position adjustment
(forward)0 (Centered)
-3 (Rearward)
to +3 (Front- ward)
O——
Park position adjustment
(reverse)0 (Centered)
-3 (Rearward) to +3 (Front- ward)
O——
Rear accessory settingOff
3.9 in. (10 cm)
O——
7.9 in. (20 cm)
11.8 in. (30 cm)
15.7 in. (40 cm)
Clear registered parking
space——O——
FunctionDefault settingCustomized setting
Switching between outside
air and recirculated air mode
linked to “AUTO” switch
operation
OnOffO—O
A/C auto switch operationOnOffO—O
FunctionDefault settingCustomized setting
Driver’s seat temperature
preference in automatic
mode
*Standard-2 (cooler) to 2 (warmer)O—O
Passenger’s seat tempera-
ture preference in automatic
mode
*Standard-2 (cooler) to 2 (warmer)O—O
FunctionDefault settingCustomized setting

Owners Manual_USA_M62064_en
543Alphabetical Index
Alphabetical Index
A
A/C ................................... 333, 340Air conditioning filter ............. 432
Automatic air conditioning sys-tem ............................. 333, 340
Eco air conditioning mode .. 334, 341
Front seat concentrated airflow mode (S-FLOW) ................. 345
ABS (Anti-lock Brake System) ............................................... 322Warning light ........................ 456
ACA (Active Cornering Assist) ............................................... 322
ACC ......................................... 183
Active Cornering Assist (ACA) ............................................... 322
Active Sound Control (ASC).. 196
AHB (Automatic High Beam) . 200
Air conditioning filter ............. 432
Air conditioning system 333, 340 Air conditioning filter ............. 432
Automatic air conditioning sys-tem ............................. 333, 340
Eco air conditioning mode .. 334, 341
Front seat concentrated airflow mode (S-FLOW) ................. 345
Air purification screen ........... 119
Airbags ...................................... 34 Airbag operating conditions.... 36
Airbag precautions for your child............................................. 39
Correct driving posture ........... 27
Curtain shield airbag operating conditions ............................. 37
Curtain shield airbag precautions ............................................. 39
Front passenger occupant clas- sification system ................... 46 General airbag precautions ....39
Locations of airbags ...............34
Modification and disposal of air-
bags......................................42
Side airbag operating conditions .............................................37
Side airbag precautions..........39
Side and curtain shield airbags operating conditions .............37
Side and curtain shield airbags precautions ...........................39
SRS airbags ...........................34
SRS warning light .................455
Alarm .........................................71 Warning buzzer ....................454
ALL AUTO control ..................332
Anchor brackets ... ..............54, 62
Antennas (smart key system)136
Anti-lock Brake System (ABS) ...............................................322Warning light.........................456
Approach warning ..................251
Armrest ......... ......................... ..371
ASC (Active Sound Control) ..196
Assist grips .............................371
Audio system-linked display . 111
Automatic air conditioning sys- tem .................................333, 340Eco air conditioning mode ..334, 341
Automatic air conditioning sys- tem (vehicles with 12.3-inch dis-
play) .......................................340
Automatic air conditioning sys- tem (vehicles with 8-inch dis-
play) .......................................333
Automatic headlight leveling system ...................................199
Automatic High Beam ............200
Automatic light control system ...............................................199

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