If Your Vehicle Overheats - Toyota Mirai 2017 Owner's Manual

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8-2. Steps to take in an emergency

If your vehicle overheats

The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light (→P. 369) comes on
or flashes, or a loss of fuel cell system power is experienced. (For
example, the vehicle speed does not increase.)
● "FC System Overheat Output Power is Limited" (→P. 376) is dis-
played on the multi-information display
● Steam comes out from under the hood.
Label
Fuel cell stack coolant
reservoir
Inverter coolant reservoir