2020 TOYOTA MIRAI fuel filter

942. Fuel cell vehicle
MIRAI_OM_USA_OM62073U■
Fuel cell stack
●Depending on the usage environment, the fuel cell power output may
decline over the life of the vehicle. However, this will have almost no effect
on driving performance.
● In the following situations, the fuel cell power output may dec line faster than
normal driving:
• Extended use in areas with high amounts of dust
• Extended use in areas with high levels of sulfur (such as volc anoes or hot
springs).
• Extended use in areas with high concentrations of the following substances:
-Organic solvents, such as paint and thinner
-Amine-related materials such as ammonia
-Chlorinated substances such as salt air and snow-melting agent
However, upon returning to normal environment, the fuel cell po wer output
will recover over time.
• Salt water gets into the air cleaner filter It is recommended to replace the air cleaner filter and clean t he surround-
ing components. Have the vehicle inspected at your Toyota deale r
• The number of times the fuel cell system is started and stoppe d is exces-
sively high
• Extended use in freezing temperatures
■ Hydrogen tanks
●The hydrogen tanks are the high-pressure storage containers that are filled
with compressed hydrogen gas. The vehicle can be refueled at hy drogen
stations.
● The hydrogen tanks have an expiration date. Vehicles with expir ed hydro-
gen tanks must not be driven or refueled until the hydrogen tanks are
replaced. The expiration date is written on the inside of the fuel door. Con-
sult your Toyota dealer.
● When disposing of the hydrogen tanks or the hydrogen tank valve s, consult
your Toyota dealer for details.

952. Fuel cell vehicle
2
Fuel cell system
MIRAI_OM_USA_OM62073U■
Fuel cell stack coolant
●Fuel cell stack coolant uses a specifically-designed fluid with high electrical
insulation properties, in order to safely cool the high-voltage fuel cell stack.
● Never add water or other coolants to the fuel cell stack coolin g system, as
they will cause permanent damage.
● Consult your Toyota dealer for replenishing or changing the fue l cell stack
coolant.
■ Ion filter
●An ion filter is installed in the coolant lines for the fuel ce ll stack, in order to
maintain the normal insulation properties of the coolant.
● It is necessary to periodically change the ion filter. ( P. 428) Contact your
Toyota dealer for this periodic maintenance.
■ Tailpipe
●When the power switch is turned off and the fuel cell system is stopped
( P. 187) after driving, exhaust water is discharged. Be careful w hen stand-
ing behind the vehicle to avoid dripping or spraying.
● It is possible to manually purge the exhaust. This may be desirable, for
instance, before parking in a garage. This is done by pressing the H
2O
switch. ( P. 187)
● On cold days, water vapor in the exhaust may appear as a white mist emit-
ted from the tailpipe. This is not a malfunction.
● If the tailpipe is blocked, the fuel cell system will stop.
■ Hydrogen detectors
When the power switch is turned to ON mode, the hydrogen detect ors are
activated.

1253. Instrument cluster
3
Instrument cluster
MIRAI_OM_USA_OM62073U
● Units
Select to change the unit.
●
Meter settings
Select the menu to set up the following items ( P. 490)
• RSA notification method (if equipped)
Select to change the RSA notification method.
• RSA notification level (if equipped)
Select to change the RSA notification level.
• Time for exchanging the ion filter
Select to initialize the time for exchanging the ion filter.
• Language
Select to change the language on the display.
• Interruption display
Select to set the Interruption displays (navigation system rout e guid-
ance, Instrument panel brightness adjustment), which may appear in
some situations, on/off.
• Return to initial settings
Registered or changed meter settings will be deleted or returne d to
their default setting.
• Main display split screen (if equipped)
Select to change the main display to split screen.
• Monthly history of fuel economy history
Select to clear the history.
• Daily history of ECO log
Select to clear the log.
• Monthly history of ECO log
Select to clear the log.
• Calendar date
Select to set the date.
• Erase screen
Select to display a blank screen.

4288-2. Steps to take in an emergency
MIRAI_OM_USA_OM62073U■
If “High FC Temperature Reduced Power” is displayed
Lower the speed while check the safety, and run the vehicle like this for
several minutes.
If the message goes off, the vehicle can be driven as is, since it temporarily
overheated.
This message may be displayed when driving under severe operati ng con-
ditions.
(For example, when driving up a long steep hill.)
■ If “FC System Shutdown due to F reezing conditions Stop Your Veh icle in
a Safe Place and Contact Your Dealer” is displayed.
P. 189
■ If “Maintenance Required for Hybrid Battery Cooling Parts at Yo ur
Dealer” is displayed
The filter may be clogged, the air intake vent may be blocked or there may be
a gap in the duct. Have maintenance performed on the traction b attery cool-
ing component at your Toyota dealer.
■ If “Shift to P Before Exiting Vehicle” is displayed
Message is displayed when the driver’s door is opened without t urning the
power switch to off with the shift position in any position oth er than P.
Shift the shift position to P.
■ If “Shift is in N Release Accelerator Before Shifting” is displ ayed
Message is displayed when the accelerator pedal has been depressed and
the shift position is in N. Release the accelerator pedal and s hift the shift posi-
tion to D or R.
■ If “Press Brake When Vehicle is Stopped FC System may Overheat” is
displayed
Message is displayed when the accelerator pedal is depressed to maintain
the vehicle position when stopped on an upward slope, etc.
If this continues, the fuel cell system may overheat.
Release the accelerator pedal and depress the brake pedal.
■ If “Accelerator Pedal is Pressed Check The Accelerator Pedal” i s dis-
played
The accelerator pedal may be stuck.
If the message does not disappear even when the foot has been removed
from the accelerator pedal, check that the accelerator pedal is not stuck.
■ If “Ion Filter Maintenance Requi red Visit Your Dealer” is displayed
Ion filter replacement is necessary. Contact your Toyota dealer .
■ If “Shift System Malfunction St op Your Vehicle in a Safe Place then See
Owner’s Manual” is displayed
The shift position may not be able to be shifted. Stop the vehi cle in a safe
place.
Contact your Toyota dealer immediately.
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4909-2. Customization
MIRAI_OM_USA_OM62073U■
Multi-information display (
P. 111)
*1: The default setting varies according to country.
*2: If equipped
*3: When the meter control switches ( P. 118) of the is pressed, a return
to screen display message is displayed on the multi-information display.
FunctionDefault
settingCustomized setting
Units*1miles
(MPGe)km
(kg/100km)—O——
LanguageEnglishFrench—O——
Time for exchanging the ion
filter—Initialize—O——
Interruption
display
Navigation
system route
guidance
OnOff—O——
Instrument
panel
brightness
adjustment
OnOff—O——
Return to initial settings—Ye s—O——
Main display split screen*2SimpleSplit—O——
Monthly history of fuel
economy history—Clear—O——
Daily history of ECO log—Clear—O——
Monthly history of ECO log—Clear—O——
Calendar date—Set—O——
Erase screen—Erase*3—O——