Toyota 2015 Prius, Owner'S Manual

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2-1. Driving procedures
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2
When
d
riving
■
Situations in which EV drive mode cannot be turned on
It may not be possible to turn EV drive mode on in the following situations.
*
If it cannot be turned on, a buzzer will sound and a message will be shown
on the multi-information display.
●
The temperature of the hybrid system is high.
The vehicle has been left in the sun, driven on a hill, driven at high
speeds, etc.
●
The temperature of the hybrid system is low.
The vehicle has been left in temperatures lower than about 32
q
F (0
q
C)
for a long period of time etc.
●
The gasoline engine is warming up.
●
The hybrid battery (traction battery) is low.
When the amount of remaining hybrid battery (traction battery) charge
displayed on the meter is low. (
o
P. 44)
●
Vehicle speed is high.
●
The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
●
The windshield defogger is in use.
*
: Depending on the circumstances, EV drive mode may also not be
switched to in situations other than those above.
■
Switching to EV drive mode when the gasoline engine is cold
If the hybrid system is started while the gasoline engine is cold, the gasoline
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 illumi-
nated, press the EV drive mode switch before the gasoline engine starts to
switch to EV drive mode.