2023 TOYOTA MIRAI battery

540What to do if... (Troubleshooting)
Owners Manual_USA_M62064_en
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
 If you lose your mechanical
keys, new genuine mechani-
cal keys can be made by your
Toyota dealer. ( P.481)
 If you lose your electronic
keys, the risk of vehicle theft
increases significantly. Con-
tact your Toyota dealer imme-
diately. ( P.481)
 Is the electronic key battery
weak or depleted? ( P.436)
 Is the power switch in ON?
When locking the doors, turn the
power switch off. ( P.183)
 Is the electronic key left inside
the vehicle?
When locking the doors, make sure that you have the
electronic key on
your person.
 The function may not operate
properly due to the condition
of the radio wave. ( P.138)
 Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the child-
protector lock. ( P.130)
 The function to prevent the
electronic key from being left
inside the trunk will operate
and you can open the trunk as
usual. Take the key out from
the trunk. ( P.134)
 Did you press the power
switch while firmly depress-
ing the brake pedal?
( P.180)
If you have a problem,
check the following before
contacting your Toyota
dealer.
The doors cannot be
locked, unlocked, opened
or closed
You lose your keys
The electronic key does
not operate properly
The doors cannot be
locked or unlocked
The rear door cannot be
opened
The trunk lid is closed
with the electronic key
left inside
If you think something is
wrong
The fuel cell system does
not start

Owners Manual_USA_M62064_en
541What to do if... (Troubleshooting)
Is the electronic key any-
where detectable inside the
vehicle? ( P.136)
 Is the electronic key battery
weak or depleted?
In this case, the fuel cell system
can be started in a temporary way.
( P.484)
 Is the 12-volt battery dis-
charged? ( P.485)
 Is the window lock switch
pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the win dow lock switch
is pressed. ( P.164)
 The auto power off function
will be operated if the vehicle
is left in ACC for a period of
time. ( P.184)
 The seat belt reminder light is
flashing
Are the driver and the front passen-
ger wearing the seat belts?
( P.460)
 The parking brake indicator is
on
Is the parking br ake released?
(  P.191)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.454, 464)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( P. 7 1 )
Do one of the following to deac-
tivate or stop the alarms:
 Except for Canada: Unlock
the doors.
 Except for Canada: Unlock
the trunk using the mechani-
cal key.
 For Canada: Unlock the doors
or trunk using the entry func-
tion or wireless remote con-
trol.
 Turn the power switch to ACC
or ON, or start the fuel cell
system. (The alarm will be
deactivated or stopped after a
few seconds.)
The windows do not
open or close by operat-
ing the power window
switches
The power switch is
turned off a utomatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds

544Alphabetical Index
Owners Manual_USA_M62064_en
Auxiliary boxes ....................... 360
Average fuel economy ........... 107
Average vehicle speed........... 111
B
Back-up lights Replacing light bulbs ............ 443
Battery (12-volt battery) ......... 413 Battery checking................... 413
If the 12-volt battery is dis-charged .............................. 485
Preparing and c hecking before
winter.................................. 327
Warning light ........................ 455
Battery (traction battery) ......... 81
Blind Spot Monitor (BSM) ...... 256 Enabling/disabling the system........................................... 258
Brake Brake hold ............................ 194
Fluid ............................. 412, 500
Parking brake ....................... 191
Warning light ........................ 454
Brake assist ............................ 322
Break-in tips ........ ................... 170
Brightness control Instrument panel light control................................... 100, 104
BSM (Blind Spot Monitor) ...... 256 Enabling/disabling the system........................................... 258
Buzzer Hands off steering wheel warn-ing (LTA) ............................. 239
Vehicle sway warning function (LTA) ................................... 240
C
Camera Front camera ........................214
Rear camera.........................278
Toyota Teammate Advanced Park ....................................297
Care..................................392, 396 Aluminum wheel ornaments .392
Aluminum wheels .................392
Exterior .................................392
Interior ..................................396
Roof film ...............................393
Seat belts .............................396
Traction battery air intake vents...........................................433
Cargo and luggage .................175
Cargo capacity ........................178
Chains......................................329
Child restraint system ..............52 Fixed with a LATCH system ...60
Fixed with a seat belt..............56
Front passenger occupant clas-sification system ...................46
Points to remember ................52
Riding with children ................51
Types of child restraint system installation method ...............54
Using an anchor bracket ........62
Child safety ...............................51 12-volt battery precautions .414, 488
Airbag precautions .................39
Child restraint system .............54
Electronic sunshade .............364
Heated steering wheel and seat heater precautio ns..............351
How your child should wear the seat belt ................................30
Power window lock switch ....164
Power window precautions...163
Rear door child-protectors ....130

546Alphabetical Index
Owners Manual_USA_M62064_en
Driving ..................................... 169 Break-in tips ......................... 170
Correct driving posture ........... 27
Driving mode select switch... 320
Fuel cell electric vehicle driving tips........................................ 91
Procedures ........................... 169
Winter drive tips ................... 327
Driving information display ... 107
Driving position memory ....... 142 Memory recall function ......... 144
Power easy access system .. 142
Driving range .................... 99, 102
Driving support system informa- tion display ........................... 110
Dynamic radar cruise control with full-speed range ........... 244Approach warning ................ 251
Warning message ................ 254
E
ECB (Electronically Controlled Brake System) ...................... 322Warning light ........................ 454
ECO Accelerator Guidance ... 108
Eco score ................................ 108
EDR (Event data recorder)......... 8
Elapsed time ........................... 111
Electric motor (traction motor) ........................................... 76, 81Location.................................. 81
Specification ......................... 498
Electric Power Steering (EPS) ............................................... 322Warning light ........................ 456
Electronic key ......................... 124 Battery-saving function......... 137
If the electronic key does not operate properly ................. 482
Replacing the battery ........... 436
Electronic sunshade .............. 363 Operation ............................. 363 Electronically Controlled Brake
System (ECB) ........................322Warning light.........................454
Emergency flashers ...............446
Emergency shut off system.....89
Emergency tire puncture repair kit ...........................................467Storage location ...................469
Emergency, in case of If a warning buzzer sounds ..454
If a warning light turns on .....454
If a warning message is dis-played .................................464
If the 12-volt battery is dis- charged ..............................485
If the electronic key does not operate properly .................482
If the fuel cell system will not start ....................................480
If the fuel door cannot be opened ...........................................482
If the vehicle is submerged or water on the road is rising ..447
If you have a flat tire .............467
If you lose your keys.............481
If you think something is wrong ...........................................453
If your vehicle becomes stuck ...........................................494
If your vehicle has to be stopped in an emergency .................446
If your vehicle needs to be towed ...........................................449
If your vehicle ove rheats ......490
Energy monitor ....................... 119
EPS (Electric Po wer Steering)
...............................................322 Warning light.........................456
Event data recorder (EDR) .........8

Owners Manual_USA_M62064_en
Alphabetical Index547
F
Flat tire .................................... 467Tire pressure warning system........................................... 418
Floor mats ................................. 26
Fluid Brake .................................... 500
Transmission ........................ 500
Washer ................................. 412
Footwell light .................... ...... 355
Front footwell lights ............... 355
Front passenger occupant clas- sification system .................... 46
Front seats .............................. 141 Adjustment ........................... 141
Cleaning ............................... 396
Correct driving posture ........... 27
Driving position memory....... 142
Head restraints ..................... 145
Memory recall function ......... 144
Power easy access system .. 142
Seat heaters ......................... 351
Seat position memory .......... 142
Seat ventilators .................... 351
Front side marker light Light switch .......................... 198
Replacing light bulbs ............ 443
Front turn signal lights .......... 190 Replacing light bulbs ............ 443
Turn signal lever ................... 190
Fuel .......................................... 210 Capacity ............................... 497
Fuel gauge ..................... 99, 102
Refueling .............................. 210
Type ..................................... 497
Warning light ........................ 460
Fuel Cell Electric Vehicle ......... 76 Charging the traction battery .. 78
Driving tips ............................. 91
Handling hydrogen gas .......... 86
Hydrogen gas ......................... 85 Hydrogen-related components81
Maintenance, repair, recycling,
and disposal .........................78
Power output restriction ..........84
Power switch ........................180
Regenerative braking .............78
Road accident cautions ..........88
Running out of fuel .................83
Service plugs ..........................87
Sounds and vibrations ............77
Starting the system ...............180
Traction battery air intake vents .............................................90
Fuel cell electric vehicle driving tips ...........................................91
Fuel cell stack .....................76, 81 Fuel cell stack cover .............409
Fuel cell stack coolant ...........410 Checking ..............................410
Preparing and checking before winter ..................................327
Fuel cell stack cover ..............409
Fuel cell system ........................76 Acoustic vehicle alerting system.............................................79
Emergency shut off system ....89
High voltage components .......81
If the fuel cell system will not start ....................................480
Overheating ..........................491
Power switch ........................180
Precautions ............................81
Predictive efficient drive..........79
Starting the fuel cell system .180
Water release .......................196
Fuel cell System Indicator ...103, 108, 118
Fuel cell unit Compartment........................408
Fuel cell unit compartment cover...........................................409

Owners Manual_USA_M62064_en
Alphabetical Index549
Instrument panel light control
....................................... 100, 104
Interior lights .......................... 355
Intuitive parking assist .......... 261 Enabling/disabling the system........................................... 262
Function ............................... 261
Warning lights....................... 457
Warning message ................ 263
Inverter coolant ...................... 410 Checking .............................. 410
Ion filter ..................................... 84
J
Jack Positioning a floor jack ......... 406
Jam protection function Power windows .................... 162
K
Keyless entrySmart key system................. 136
Wireless remote control ....... 125
Keys ......................................... 124 Battery-saving function......... 137
Electronic key ....................... 124
If the electronic key does not operate properly ................. 482
If you lose your keys ............ 481
Key number plate ................. 124
Keyless entry................ 127, 136
Mechanical key .................... 124
Power switch ........................ 180
Replacing the battery ........... 436
Warning buzzer .................... 136
Wireless remote control ....... 125
Knee airbags ............................. 34
L
Lane Tracing Assist (LTA) ......230 Operation..............................230
Warning lights .......................457
Warning messages ...............240
Language (multi-information dis- play) ....................................... 111
LATCH anchors.........................60
Lever Auxiliary catch lever .............406
Hood lock release lever ........406
Internal trunk rele ase lever ...134
Shift lever .............................185
Turn signal lever ...................190
Wiper lever ...........................204
License plate lights Light switch...........................198
Replacing light bulbs ............443
Light bulbs Replacing .............................443
Lights Automatic High Be am ...........200
Front personal lights .............356
Headlight switch ...................198
Interior lights .................355, 356
Interior lights list ...................355
Rear personal lights .............356
Replacing light bulbs ............443
Trunk light .............................134
Turn signal lever ...................190
Vanity lights ..........................380
LTA (Lane Tracing Assist) ......230 Operation..............................230
Warning lights .......................457
Warning messages ...............240
Luggage mats .........................361

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

Owners Manual_USA_M62064_en
Alphabetical Index555
Theft deterrent systemAlarm ...................................... 71
Immobilizer system ................ 70
Tire inflation pre ssure............ 428
Maintenance data................. 501
Tire inflation pressure display function............................... 418
Warning light ........................ 460
Tire information ...................... 502 Glossary ............................... 506
Size ...................................... 504
Tire identification number ..... 503
Uniform Tire Quality Grading 504
Tire pressure display ............. 418
Tire pressure warning system ............................................... 418Function ............................... 418
Initializing ............................. 420
Installing tire pressure warning valves and transmitters ...... 419
Registering ID codes ............ 422
Warning light ........................ 460
Tires ......................................... 416 Chains .................................. 329
Checking .............................. 416
Emergency tire puncture repair kit........................................ 467
If you have a flat tire ............. 467
Inflation pressure.................. 428
Information ........................... 502
Replacing ............................. 424
Rotating tires ........................ 418
Size ...................................... 501
Snow tires ............................ 327
Tire inflation pressure display function............................... 418
Tire pressure warning system ........................................... 418
Warning light ........................ 460
Tools ........................................ 469
Top tether strap ........................ 62 Total load capacit
y .................496
To w i n g Dinghy towing .......................179
Emergency towing ................449
Towing eyelet........................451
Trailer towing ...... ..................179
Toyota Safety Sense 2.5 +......214 AHB (Automatic High Beam) 200
Dynamic radar cruise control with full-speed range ..........244
LTA (Lane Tracing Assist) .....230
PCS (Pre-Collisio n System) .219
RSA (Road Sign Assist) ........241
Toyota Teammate Advanced Park ........................................293Memory function ................... 311
Parallel exiting fu nction ........309
Parallel parking function .......306
Perpendicular ex iting (forward/
reverse) function.................304
Perpendicular parking (forward/ reverse) function.................301
TRAC (Traction Control) ........322
Traction battery.........................81 Charging .................................78
Location ..................................81
Specification .........................498
Traction battery air intake vents.............................................90
Traction battery air intake vents .........................................90, 433
Traction Control (TRAC) ........322
Traction motor (electric motor)76
Trailer towing ..........................179
Trip meters ......................100, 104
Trunk ........................................132 Internal trunk rele ase lever ...134
Smart key system .................133
Trunk easy closer .................134
Trunk features ......................361