2017 TOYOTA MIRAI Owners Manual

4098-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
8
When trouble arises
■If “FC System Overheat Output Power is Limited” is displayed
on the multi-information displayStop the vehicle in a safe place and turn off the air conditioning
system, and then stop the fuel cell system.
If you see steam or coolant leaks:
Carefully lift the hood after the steam subsides.
If you do not see steam or coolant leaks:
Carefully lift the hood.
After the fuel cell system has
cooled down, inspect the
hoses and radiator core
(radiator) for any leaks.
Inverter coolant radiator
Electric cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The inverter coolant level is
satisfactory if it is between
the “FULL” and “LOW” lines
on the reservoir.Inverter coolant reservoir
“FULL”
“LOW”
Add inverter coolant if neces-
sary.
Water can be used in an emer-
gency if inverter coolant is
unavailable.
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4108-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
Start the fuel cell system and turn the air conditioning system on
to check that the radiator cooling fans operate and to check for
coolant leaks from th e radiator or hoses.
The fans operate when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking
the fan sound and air flow. If it is difficult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the fuel cell system immedi ately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Toyota dealer.
WARNING
■ When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The motor compartment may be very hot.
● After the fuel cell system has been turned off, check that the “READY”
indicator is off.
When the fuel cell system is operating, the cooling fans may suddenly
operate even if the fuel cell system stops. Do not touch or approach rotat-
ing parts such as the fans, which may lead to fingers or clothing (espe-
cially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir caps or radiator cap, while the fuel cell
system and radiator are hot.
High temperature steam or coolant could spray out.
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4118-2. Steps to take in an emergency
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8
When trouble arises
NOTICE
■When adding inverter coolant
Add coolant slowly after the fuel cell system has cooled down sufficiently.
Adding inverter cool coolant to a hot fuel cell system too quickly can cause
damage to the fuel cell system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additive with inverter coolant.
● For replacement of the fuel cell stack coolant, contact your Toyota dealer.
● Do not use water or any other coolant when refilling the fuel cell stack
coolant. Also, do not use any additive agents for the coolant.

4128-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
If the vehicle becomes stuck
Set the parking brake and stop the fuel cell system.
Remove the mud, snow or sand from around the front wheels.
Place wood, stones or some other material under the front wheels
to help provide traction.
Restart the fuel cell system.
Shift the shift position to D or R and release the parking brake.
Then, while exercising caution, depress the accelerator pedal.
■ When it is difficult to free the vehicle
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
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Press to turn off TRAC.
WARNING
■ When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the
surrounding area is clear to avoid striking other vehicles, objects or people.
The vehicle may also lunge forward or lunge back suddenly as it becomes
free. Use extreme caution.
■ When shifting the shift position
Be careful not to shift the shift position with the accelerator pedal
depressed.
This may lead to unexpected rapid acceleration of the vehicle that may
cause an accident resulting in death or serious injury.

4138-2. Steps to take in an emergency
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8
When trouble arises
NOTICE
■To avoid damaging the transmission and other components
● Avoid spinning the front wheels and depressing the accelerator pedal
more than necessary.
● If the vehicle remains stuck even after these procedures are performed,
the vehicle may require towing to be freed.

4148-2. Steps to take in an emergency
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415
9Vehicle specifications
MIRAI_OM_USA_OM62023U9-1. Specifications
Maintenance data (fuel, fluid level, etc.) ....... 416
Tire information ................. 422
9-2. Customization Customizable features ...... 434
9-3. Items to initialize Items to initialize ............... 442

4169-1. Specifications
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Maintenance data (fuel, fluid level, etc.)
*: Unladen vehicles
Dimensions and weight
Overall length 192.5 in. (4890 mm)
Overall width 71.5 in. (1815 mm)
Overall height*60.5 in. (1535 mm)
Wheelbase109.5 in. (2780 mm)
TreadFront60.5 in. (1535 mm)
Rear61.0 in. (1545 mm)
Vehicle capacity weight
(occupants + luggage) 690 lb. (315 kg)