Toyota SIENNA 2022 Manual page 240

■ Situations in which EV drive
mode cannot be turned on
It may not be possible to turn EV
drive mode on in the following situa-
tions. If it cannot be turned on, a
buzzer will sound and a message
will be shown on the multi-informa-
tion display.
● The temperature of the hybrid sys-
tem is high.
The vehicle has been left in the
sun, driven on a hill, driven at high
speeds, etc.
● The temperature of the hybrid sys-
tem is low.
The vehicle has been left in tem-
peratures lower than about 32°F
(0°C) for a long period of time etc.
● The gasoline engine is warming
up.
● The hybrid battery (traction bat-
tery) is low.
The remaining battery level indi-
cated in the Energy monitor dis-
play is low. (P.122)
● Vehicle speed is high.
● The accelerator pedal is
depressed firmly or the vehicle is
on a hill etc.
● The windshield defogger is in use.
Use the EV drive mode when it
becomes available.
■ Switching to EV drive mode
when the gasoline engine is
cold
If the hybrid system is started while
the gasoline engine is cold, the gas-
oline engine will start automatically
after a short period of time in order
to warm up.
In this case, you will become unable
to switch to EV drive mode. After the
hybrid system has started and the
"READY" indicator has illuminated,
press the EV drive mode switch
before the gasoline engine starts to
switch to EV drive mode.
4-2. Driving procedures
■ Automatic cancelation of EV
drive mode
When driving in EV drive mode, the
gasoline engine may automatically
restart in the following situations.
When EV drive mode is canceled, a
buzzer will sound, the EV drive
mode indicator will flash and go off
and a message will be shown on the
multi-information display.
● The hybrid battery (traction bat-
tery) becomes low.
The remaining battery level indi-
cated in the Energy monitor dis-
play is low. (P.122)
● Vehicle speed is high.
● The accelerator pedal is
depressed firmly or the vehicle is
on a hill etc.
Drive the vehicle for a while before
attempting to turn on the EV drive
mode again.
■ Possible driving distance when
driving in EV drive mode
EV drive mode's possible driving
distance ranges from a few hundred
meters to approximately 0.6 mile (1
km). However, depending on vehi-
cle conditions, there are situations
when EV drive mode cannot be
used.
(The distance that is possible
depends on the hybrid battery [trac-
tion battery] level and driving condi-
tions.)
■ Fuel economy
The hybrid system is designed to
achieve the best possible fuel econ-
omy during normal driving (using
the gasoline engine and electric
motor [traction motor]). Driving in
EV drive mode more than neces-
sary may lower fuel economy.
■ If "EV Mode Unavailable" is
shown on the multi-information
display
The EV drive mode is not available.
The reason the EV drive mode is
not available (the vehicle is idling,
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