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●
Consult your Toyota dealer if the
hydrogen tanks or valves need to
be disposed.
■
Fuel cell stack coolant
●
Fuel cell stack coolant uses a spe-
cifically-designed fluid with high
electrical insulation properties, in
order to safely cool the high-volt-
age fuel cell stack.
Never add water or other coolants
●
to the fuel cell stack cooling sys-
tem, as they will cause permanent
damage.
●
Consult your Toyota dealer for
replenishing or changing the fuel
cell stack coolant.
■
Ion filter
●
An ion filter is installed in the cool-
ant lines for the fuel cell stack, in
order to maintain the normal insu-
lation properties of the coolant.
●
It is necessary to periodically
change the ion filter. (P.456)
Contact your Toyota dealer for this
periodic maintenance.
■
Tailpipe
●
When the power switch is turned
off and the fuel cell system is
stopped (P.174) after driving,
exhaust water is discharged. Be
careful when standing behind the
vehicle to avoid dripping or spray-
ing.
●
It is possible to manually purge
the exhaust. This may be desir-
able, for instance, before parking
in a garage. This is done by press-
ing the H
O switch. (P.190)
2
●
On cold days, water vapor in the
exhaust may appear as a white
mist emitted from the tailpipe. This
is not a malfunction. A white mist
may be emitted from the vehicle
side depending on the wind direc-
tion. If it is a concern, consult with
a Toyota dealer.
●
If the tailpipe is blocked, the fuel
cell system will stop.
MIRAI Owners Manual_USA_M62034_en
2-1. Fuel cell vehicle
●
In the following state when cold, a
white mist may be emitted. Water
vapor is being emitted as a sys-
tem protection and it is not a mal-
function.
• If several minutes have passed
after opening the fuel lid, such as
refueling.
• Several hours have passed after
the power switch was turned off.
■
Hydrogen detectors
When the power switch is turned to
ON, the hydrogen detectors are
activated.
■
Power output restriction
When the power output is restricted,
the vehicle may fail to accelerate or
even decelerate, even though the
accelerator pedal is depressed. If a
safe driving speed cannot be main-
tained, stop the vehicle in a safe
place away from the traffic. This
may be caused by the following con-
ditions:
●
The coolant temperature may be
too high. This can be caused by
driving conditions such as
repeated sudden acceleration and
deceleration, continuous driving
on an incline, continuous driving
at high altitudes with a high load,
etc. In such situations, "FCV sys-
tem overheated Output power
reduced" is displayed on the multi-
information display, and the power
output is restricted. Once the cool-
ant returns to normal temperature,
the power output will return to nor-
mal. (P.454)
●
The remaining fuel may be low.
After the low fuel level warning
light comes on, the output power
will be gradually restricted in order
to extend the possible driving dis-
tance. Once getting to this point,
the remaining driving distance
possible is short. Immediately refill
the vehicle with hydrogen.
●
On cold days, the low fuel level
warning light comes on faster than
usual and the output power is
81
2
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