ECO mode TOYOTA MIRAI 2023 Service Manual

3436-1. Using the air conditioning system and defogger
Owners Manual_USA_M62064_en
6
Interior features
humidity sensor detects fog on the
windshield and controls the air con-
ditioning system to prevent fog.
■Outside/recirculated air mode
●Setting to the r ecirculated air
mode temporarily is recom-
mended in preventing dirty air
from entering the vehicle interior
and helping to c ool the vehicle
when the outside air temperature
is high.
●Outside/recirculated air mode may
automatically switch depending on
the temperature setting or the
inside temperature.
■When the outside temperature
falls to nearly 32°F (0°C)
The dehumidification function may
not operate even when “A/C” switch
is selected.
■Operation of the air condition-
ing system in Eco drive mode
●In Eco drive mode, the air condi-
tioning system is controlled as fol-
lows to prioritize fuel efficiency:
• Fuel cell system and compressor
operation controlled to restrict
heating/cooling capacity
• Fan speed restr icted when auto-
matic mode is selected
●To improve air co nditioning perfor-
mance, perform the following
operations:
• Adjust the fan speed
• Turn off Eco drive mode ( P.320)
• Turn off Eco air conditioning mode
●When the driving mode is set to
Eco drive mode, the Eco air condi-
tioning mode will be turned on
automatically. Even in this case,
the Eco air conditioning mode can
be turned off by s electing the Eco
air conditioning mode switch.
■When cleaning the air condi-
tioning control panel
Touch switches may respond when
cleaning. Turn the power switch to
OFF before proceeding with clean-
ing.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condi-
tioning system to the outside air
mode.
●During use, various odors from
inside and outside the vehicle may
enter into and accumulate in the
air conditioning system. This may
then cause odor to be emitted
from the vents.
●In order to suppr ess odors that
occur when the air conditioning
system starts, the air flow mode
may change to blow air to the feet
or air may stop blowing for a short
period of time immediately after
the air conditioning system is
started in automatic mode.
●When parking, the system auto-
matically switches to outside air
mode to encourage better air cir-
culation throughout the vehicle,
helping to reduce odors that occur
when starting the vehicle.
■Air conditioning filter
 P.432
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the h ood at the loca-
tion shown in the following illustra-
tion.

3476-1. Using the air conditioning system and defogger
Owners Manual_USA_M62064_en
6
Interior features
Select the air flow mode
Each time the switch is touched,
the air flow mode changes. : Air flows to the upper body
: Air flows to the upper body
and feet
: Air flows to the feet
: Air flows to the feet and the
windshield defogger operates
Turns each function on/off
Each time the switch is touched,
the function turns on/off.
When the function i s on, the indica-
tor on the swit ch illuminates.
“A/C”: Cooling and dehumidification
function ( P.341)
“SYNC”: “SYNC” mode ( P.345)
: Front seat concentrated air-
flow mode (S-FLOW) ( P.345)
: Outside/recirculated air
mode ( P.332)
Fan speed display
Setting of the fan speed is dis- played.
■Option control screen
The functions can be switched (ON) and (OFF).
ALL AUTO mode
* (  P.332)
Eco air conditioning mode
( P.343)
Windshield wiper de-icer
*
( P.347)
*: If equipped
This feature is used to prevent
ice from building up on the wind-
shield and wiper blades.
The functions can be switched
(ON) and (OFF).
Touch Windshield wiper de-icer
on the multimedia display.
The indicator comes on when the
system is on.
The windshield wiper de-icer will
automatically turn off after approxi-
mately 15 minutes.
Windshield wiper de-icer
(if equipped)
LV

3486-1. Using the air conditioning system and defogger
Owners Manual_USA_M62064_en
Windshield wiper de-icer
If you do not operate for more than
20 seconds after switching to the
rear air conditioner operation
screen, it will return to the front air
conditioner operation screen.
Adjust the rear seat tempera-
ture setting
Adjust the rear seat airflow
mode setting
: Air flows to the upper body: Air flows to the upper body and
feet
: Air flows to the feet
■Location of air outlets
The air outlets and air volume
change according to the
selected air flow mode.
■Adjusting the air flow direc-
tion and opening/closing
the air outlets
Front
1 Direct air flow to the left or
right, up or down
2 Open the vent
3 Close the vent
WARNING
■To prevent burns
Do not touch the glass at lower
part of the windshield or to the
side of the fron t pillars when the
windshield wiper deicer is on.
Rear air conditioning con-
trol screen
LV
Air outlet layout and oper-
ations

3526-1. Using the air conditioning system and defogger
Owners Manual_USA_M62064_en
speed level
The seat ventilator can be adjusted
in 3 levels. (Low, Mid or Hi)
AUTO control switch
When the AUTO control is on, the
indicator illuminates on the screen.
(  P.332)
Rear
Adjust the seat heater tem-
perature level
The seat heater can be adjusted in
3 levels. (Low, Mid or Hi)
Adjust the seat ventilator fan
speed level
The seat ventilator can be adjusted
in 3 levels. (Low, Mid or Hi)
AUTO control switch
When the AUTO control is on, the
indicator illuminate s on the screen.
(  P.332)
■Rear control panel (if
equipped)
Adjust the rear seat heater
temperature level
The seat heater c an be adjusted in
3 levels. (Low, Mid or Hi)
Adjust the rear seat ventilator
fan speed level
The seat ventilator can be adjusted
in 3 levels. (Low, Mid or Hi)
Indicators
■The heated steering wheel, seat
heaters and seat ventilators can
be used when
The power switch is in ON.
■Air conditioning system-linked
control mode
When the seat ventilator fan speed
level is Hi, the s eat ventilator fan
speed becomes higher according to
the fan speed of the air conditioning
system.
■When the air conditioning sys-
tem is operating in S-FLOW
mode
If a passenger is not detected in the
passenger seat, the seat ventilator
and seat heater of the passenger’s
seat will be turned off if on.
(  P.345)

3536-1. Using the air conditioning system and defogger
Owners Manual_USA_M62064_en
6
Interior features
■Change settings for the rear
control panel
The following settings can be
changed.
• Reaction time after touching the button.
• Turn button operation sounds ON/OFF
1 Stop the vehicle in a safe place
and stop the fuel cell system.
2 Press the power switch 1 time
with brake pedal released and
switch the mode to ACC.
The setting cannot be changed
when the power switch is ON.
3 Press for 10 seconds or
more while pressing the but-
ton.
4 Release the bu tton after the
buzzer sounds.
5 Select customizable item
Change the reaction time for button
operations:
When is press ed it becomes
faster, when is pressed it
becomes slower.
Change the button operation
sounds ON/OFF
When is pressed it turns ON,
when is pressed it turns OFF.
6 When changes are complete, the
indicators for the seat
heater/seat ventila tor turns on as
shown in the following table. 7
Settings are complete with any of
the following.
• Operate the button and turn OFF the rear control panel.
• Press the power switch.
• Do not operate t he power switch
for approximately 10 seconds.
■Customization
Some functions can be customized.
(  P.523)
FunctionSettingsIndicator
Reaction
Time
Fast
A little fast
Normal
A little
slow
Slow
Operation
sounds
ON
OFF

3927-1. Maintenance and care
Owners Manual_USA_M62064_en
7-1.Maintenance and care
Working from top to bottom,
liberally apply water to the
vehicle body, wheel wells and
underside of the vehicle to
remove any dirt and dust.
 Wash the vehicle body using
a sponge or soft cloth, such
as a chamois.
 For hard-to-remove marks,
use car wash soap and rinse
thoroughly with water.
 Wipe away any water.
 Wax the vehicle when the
waterproof coating deterio-
rates.
If water does not bead on a clean
surface, apply wax when the vehi-
cle body is cool.
■Self-restoring coat
The vehicle body has a self-restor-
ing coating that is resistant to small
surface scratches caused in a car
wash etc.
●The coating lasts for 5 to 8 years
from when the vehicle is delivered
from the plant.
●The restoration time differs
depending on t he depth of the
scratch and outside temperature. The restoration time may become
shorter when the coating is
warmed by applying warm water.
●Deep scratches caused by keys,
coins, etc. cannot be restored.
●Do not use wax that contains
abrasives.
■Automatic car washes
●Before washing the vehicle:
• Fold the mirrors
Start washing from the front of the
vehicle. Extend the mirrors before
driving.
●Brushes used in automatic car
washes may scratch the vehicle
surface, parts (wheel, etc.) and
harm your vehicle’s paint.
●When the shift position needs to
be held in N, refer to P.188.
■High pressure car washes
●As water may enter the cabin, do
not bring the nozzle tip near the
gaps around the doors or perime-
ter of the windows, or spray these
areas continuously.
●Turn the power switch off.
■When using a car wash
If the door handle becomes wet
while the electronic key is within the
effective range, the door may lock
and unlock repeatedly. In that case,
follow the following correction pro-
cedures to wash the vehicle:
●Place the key in a position 6 ft. (2
m) or more separate from the
vehicle while the vehicle is being
washed. (Take care to ensure that
the key is not stolen.)
●Set the electronic key to battery-
saving mode to disable the Smart
key system. ( P.137)
■Wheels and wheel ornaments
●Remove any dirt immediately by
using a neutral detergent.
●Wash detergent off with water
immediately after use.
Cleaning and protect-
ing the vehicle exte-
rior
Perform cleaning in a man-
ner appropriate to each
component and its material.
Cleaning instructions

4147-3. Do-it-yourself maintenance
Owners Manual_USA_M62064_en
●The power switch mode is
recorded by the vehicle. If the 12-
volt battery is reconnected, the
vehicle will return the power
switch mode to the status it was in
before the 12-volt battery was dis-
connected. Make sure to turn off
the power switch before discon-
necting the 12-volt battery. Take
extra care when connecting the
12-volt battery if the power switch
mode prior to discharge is
unknown.
●When the 12-volt b attery is recon-
nected, start the fuel cell system,
depress the brake pedal, and con-
firm that it is possible to shift into
each shift position.
If the system will not start even after
multiple attempts, contact your Toy-
ota dealer.
WARNING
■Chemicals in the 12-volt bat-
tery
The 12-volt battery contains poi-
sonous and corrosi ve sulfuric acid
and may produce hydrogen gas
which is flammable and explosive.
To reduce the risk of death or seri-
ous injury, take th e following pre-
cautions while working on or near
the 12-volt battery:
●Do not cause sparks by touch-
ing the 12-volt battery terminals
with tools.
●Do not smoke or light a match
near the 12-volt battery.
●Avoid contact with eyes, skin
and clothes.
●Never inhale or swallow electro-
lyte.
●Wear protective safety glasses
when working near the 12-volt
battery.
●Keep children away from the
12-volt battery.
■Where to safely charge the
12-volt battery
Always charge the 12-volt battery
in an open area. Do not charge
the 12-volt battery in a garage or
closed room where there is insuf-
ficient ventilation.
■Emergency measures regard-
ing electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean
water for at least 15 minutes
and get immediate medical
attention. If possible, continue
to apply water with a sponge or
cloth while traveling to the near-
est medical facility.
●If electrolyte gets on your skin
Wash the affected area thor-
oughly. If you feel pain or burn-
ing, get medical attention
immediately.
●If electrolyte gets on your
clothes
It can soak through clothing on
to your skin. Imm ediately take
off the clothing and follow the
procedure above if necessary.
●If you accidentally swallow elec-
trolyte
Drink a large quantity of water
or milk. Get emergency medical
attention immediately.
■When replacing the 12-volt
battery
Use a 12-volt battery designed for
this vehicle. Failu re to do so may
cause gas (hydrogen) to enter the
passenger compartment, causing
a fire or explosion.
For replacement of the 12-volt
battery, contact your Toyota
dealer.

4177-3. Do-it-yourself maintenance
Owners Manual_USA_M62064_en
7
Maintenance and care
mance tires best suited to highway
driving under dry conditions. Since
summer tires do not have the same
traction performanc e as snow tires,
summer tires are inadequate for
driving on snow-covered or icy
roads. For driving on snow-covered
roads or icy roads, the use of snow
tires is recommended. When install-
ing snow tires, be sure to replace all
four tires.
●All season tires
All season tires are designed to pro-
vide better traction in snow and to
be adequate for driving in most win-
ter conditions a s well as for use
year-round. All season tires, how-
ever, do not have adequate traction
performance compared with snow
tires in heavy or loose snow. Also,
all season tires fall short in accelera-
tion and handling performance com-
pared with summer tires in highway
driving.
●Snow tires
For driving on snow-covered roads
or icy roads, we recommend using
snow tires. If you need snow tires,
select tires of the same size, con-
struction and load capacity as the
originally installed tires. Since your
vehicle has radial tires as original
equipment, make sure your snow
tires also have radial construction.
Do not install stud ded tires without
first checking local regulations for
possible restrictions. Snow tires
should be installed on all wheels.
(  P.327)
■If the tread on snow tires wears
down below 0.16 in. (4 mm)
The effectiveness of the tires as
snow tires is lost.
WARNING
■When inspecting or replacing
tires
Observe the following precautions
to prevent accidents.
Failure to do so may cause dam-
age to parts of the drive train as
well as dangerous handling char-
acteristics, which may lead to an
accident resulting in death or seri-
ous injury.
●Do not mix tires of different
makes, models or tread pat-
terns.
Also, do not mix tires of remark-
ably different treadwear.
●Do not use tire sizes other than
those recommended by Toyota.
●Do not mix differently con-
structed tires (radial, bias-belted
or bias-ply tires).
●Do not mix summer, all season
and snow tires.
●Do not use tires that have been
used on another vehicle.
Do not use tires if you do not
know how they were used previ-
ously.
NOTICE
■Driving on rough roads
Take particular care when driving
on roads with loose surfaces or
potholes.
These conditions may cause
losses in tire inflation pressure,
reducing the cushioning ability of
the tires. In addition, driving on
rough roads may cause damage
to the tires themselves, as well as
the vehicle’s wheels and body.

4848-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
1With the P shift position
selected, firmly depress the
brake pedal.
2 Touch the Toyota emblem
side of the electronic key to
the power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACC.
3Firmly depress the brake
pedal and check that is
shown on the multi-informa-
tion display.
4 Press the power switch.
In the event that the fuel cell
system still cannot be started,
contact your Toyota dealer.
■Stopping the fuel cell system
Set the parking brake, shift the shift
position to P and press the power
switch as you no rmally do when
stopping the fuel cell system.
■Electronic key battery
As the above proce dure is a tempo-
rary measure, it is recommended
that the electronic key battery be
replaced immediatel y when the bat-
tery is depleted. ( P.436)
■Alarm (For Canada)
Using the mechanical key to lock
the doors will not set the alarm sys-
tem. If a door is unlocked using the
mechanical key when the alarm sys-
tem is set, the alarm may be trig-
gered. ( P.71)
■Changing power switch modes
Release the brake pedal and press
the power switch in step 3 above.
The fuel cell system does not start
and modes will be changed each
time the switch is pressed. ( P.183)
Starting the fuel cell sys-
tem

4878-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
■Starting the fuel cell system
when the 12-volt battery is dis-
charged
The fuel cell system cannot be
started by push-starting.
■To prevent 12-volt battery dis-
charge
●Turn off the headlights and the
audio system while the fuel cell
system is off.
●Turn off any unnecessary electri-
cal components when the vehicle
is running at a low speed for an
extended period, such as in heavy
traffic.
■When the 12-volt battery is
removed or discharged
●Information stor ed in the ECU is
cleared. When the 12-volt battery
is depleted, have the vehicle
inspected at you r Toyota dealer.
●Some systems may require initial-
ization. ( P.526)
●If the 12-volt battery discharges, it
may not be possible to shift the
shift position to other positions.
In this case, the vehicle cannot be
towed without lifting both rear
wheels because the rear wheels will
be locked.
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals
are removed, the information stored
in the ECU is cleared. Before
removing the 12-volt battery termi-
nals, contact your Toyota dealer.
■Charging the 1 2-volt battery
The electricity stor ed in the 12-volt
battery will discharge gradually even
when the vehicle is not in use, due
to natural discharge and the drain-
ing effects of certain electrical appli-
ances. If the vehicle is left for a long
time, the 12-volt battery may dis-
charge, and the fuel cell system
may be unable to s tart. (The 12-volt battery recharges automatically
while the fuel cell
system is operat-
ing.)
■When recharging or replacing
the 12-volt battery
●In some cases, it may not be pos-
sible to unlock the doors using the
smart key system when the 12-
volt battery is discharged. Use the
wireless remote c ontrol or the
mechanical key to lock or unlock
the doors.
●The fuel cell system may not start
on the first attempt after the 12-
volt battery has recharged but will
start normally after the second
attempt. This is not a malfunction.
●The power switch mode is memo-
rized by the vehicle. When the 12-
volt battery is reconnected, the
system will return to the mode it
was in before the 12-volt battery
was discharged. Before discon-
necting the 12-volt battery, turn
the power switch off.
If you are unsure what mode the
power switch was in before the
12-volt battery discharged, be
especially careful when recon-
necting the 12-volt battery.
●When the 12-volt battery is recon-
nected, start the fuel cell system,
depress the brake pedal, and con-
firm that it is possible to shift into
each shift position.
●If the battery is removed or the ter-
minals disconnected without oper-
ating the water release function
during cold weather, the vehicle
may not start due to the fuel cell
system being frozen. To prevent
this, operate th e water release
function before removing the bat-
tery or disconnecting the termi-
nals. ( P.196)