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2-1. Electric vehicle system
■Charging the traction battery
or stops.
Be sure to maintain the traction bat-
tery charge level suitable for your
driving needs.
●Relay operating sounds such as a
snap or soft clank will be emitted
from the traction battery in the fol-
lowing situations:
If the traction battery fully dis-
charges, the vehicle cannot be
driven at all. When the battery
becomes low, charge it as soon as
possible.
• When the EV system is started or
stopped
• When charging starts or com-
pletes
• When the vehicle is driven the first
time after the traction battery has
been charged using DC charging
■If the traction battery becomes
low
●If the traction battery becomes
low, the traction battery charge
warning light comes on or flashes
and a message will be displayed
on the multi-information display.
(P.515)
●Sounds may be heard due to
regenerative braking when the
brake pedal is depressed or as
the accelerator pedal is released.
●Cooling fan operating sounds
from the radiator.
●If the traction battery is completely
discharged, the EV system cannot
be started and driving will not be
possible. When the traction bat-
tery becomes low, charge it as
soon as possible.
●The operation sound of the air
conditioning system (air condition-
ing compressor, blower motor).
■Maintenance, repair, recycling,
and disposal
Contact your Toyota dealer regard-
ing maintenance, repair, recycling
and disposal. Do not dispose of the
vehicle yourself.
■Sounds and vibrations specific
to an battery electric vehicle
Because there is no engine sound
or vibration, it is easy to mistake the
battery electric vehicle for being off
when it is actually still running, as
indicated by the “READY” indicator
being illuminated. For safety, make
sure to always shift the shift position
to P and apply the parking brake
when parked.
Acoustic Vehicle Alerting
System
A sound which changes in
accordance with the driving
speed, will be played in order to
warn people nearby of the vehi-
cle’s approach. This sound may
be heard inside the vehicle. The
sound will stop when the vehicle
speed exceeds approximately
23 mph (37 km/h).
Before and after the EV system is
started, the following sounds and
vibrations may occur. However,
these sounds and/or vibrations are
not signs of malfunctions:
●The brake system operation
sound may be heard from the
front of the vehicle when the
driver’s door is opened.
●Motor sounds may be heard from
the motor compartment or lug-
gage compartment.
■Acoustic Vehicle Alerting Sys-
tem
●Electrical relay sounds may be
heard from the motor compart-
ment when the EV system starts
In the following cases, the Acoustic
Vehicle Alerting System may be dif-
ficult for surrounding people to hear.
Owners Manual_USA_M42C01_en
English 
