Toyota Mirai 2020 Quick Reference Manual page 14

HYDROGEN FUEL CELL
SYSTEM & SAFETY FEATURES
Water release (H
Water is a natural by-product of the fuel cell process. The system is designed to
automatically purge water from the drain pipe at the rear of the vehicle while driving
and sometimes while it is shut off.
Water can be manually purged before parking in certain situations by pressing
the "H 0" switch with the vehicle in "READY" mode. The system will regulate water
2
levels automatically. Drivers should typically let the vehicle handle this as opposed
to using this switch.
Refer to the Owner's Manual for more details on this system before attempting to
use it.
0) switch
2
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