2020 TOYOTA MIRAI Owners Manual (in English)

4017-3. Do-it-yourself maintenance
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7
Maintenance and care
■Use a CR2032 lithium battery
●Batteries can be purchased at your Toyota dealer, local electri cal appliance
shops or camera stores.
● Replace only with the same or equivalent type recommended by the manu-
facturer.
● Dispose of used batteries according to local laws.
■ If the electronic key battery is depleted
The following symptoms may occur:
●The smart key system and wireless remote control will not funct ion properly.
● The operational range will be reduced.
WARNING
■Removed battery a nd other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
NOTICE
■ 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 cont rol.
● Do not bend either of the battery terminals.

4027-3. Do-it-yourself maintenance
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Checking and replacing fuses
Turn the power switch off.
Open the fuse box cover.
Motor compartment
Push the tab in and lift the lid
off.
Driver’s side instrument panel
Remove the lid.
Remove the fuse with the pull-
out tool.
Only type A fuses can be removed
using the pullout tool.
If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as nec-
essary.
1
2
3

4037-3. Do-it-yourself maintenance
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Maintenance and care
Check if the fuse is blown.Normal fuse
Blown fuse
Replace the blown fuse with a new fuse of an appropriate ampera ge rat-
ing. The amperage rating can be found on the fuse box lid.
4
Ty p e AType B
Ty p e CType D

4047-3. Do-it-yourself maintenance
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■After a fuse is replaced
●If the lights do not turn on even after the fuse has been repla ced, a bulb may
need replacement. ( P. 405)
● If the replaced fuse blows again, have the vehicle inspected by your Toyota
dealer.
■ If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness f rom damage.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or
injury.
● Never use a fuse of a higher amperage rating than that indicate d, 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 overload determined and repaired b y your
Toyota dealer as soon as possible.

4057-3. Do-it-yourself maintenance
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Maintenance and care
Light bulbs
■LED light bulbs
The following lights consist of a number of LEDs. If any of the LEDs burn out,
take your vehicle to your Toyota dealer to have the light repla ced.
● Headlight low beams
● Headlight high beams
● Parking lights and daytime running lights
● Front side marker lights
● Front turn signal lights
● Side turn signal lights
● Tail lights
● Stop lights
● Rear side marker lights
● Rear turn signal lights
● High mounted stop lights
● License plate lights
● Back-up lights
■ Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not
indicate a malfunction.
Contact your Toyota dealer for more information in the followin g situations:
● Large drops of water have built up on the inside of the lens.
● Water has built up inside the headlight.
If any lights burn out, have it replaced by your Toyota dealer:
WARNING
■Handling lights
Do not touch the lights while they are on or immediately after they have
been turned off. Doing so may result in burns.

4067-3. Do-it-yourself maintenance
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407
8When trouble arises
MIRAI_OM_USA_OM62073U8-1. Essential information
Emergency flashers .......... 408
If your vehicle has to be stopped in an
emergency ...................... 409
If the vehicle is trapped in rising water.................. 410
8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 411
If you think something is wrong .............................. 417
If a warning light turns on or a warning buzzer
sounds ............................ 418
If a warning message is displayed......................... 426
If you have a flat tire.......... 432
If the fuel cell system will not start ........................... 447
If the electronic key does not operate properly ........ 449
If the 12-volt battery is discharged ...................... 452
If your vehicle overheats ... 457
If the vehicle becomes stuck ............................... 463

4088-1. Essential information
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Emergency flashers
Press the switch.
All the turn signal lights will flash.
To turn them off, press the switch
once again.
■Emergency flashers
If the emergency flashers are used for a long time while the fu el cell system is
not operating (while the “READY” indicator is not illuminated), the 12-volt bat-
tery may discharge.
The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.