721-4. Hybrid system
■Charging the 12-volt battery
 P.487
■After the 12-volt battery has dis-
charged or when the terminal 
has been removed and installed 
during replace, etc.
The gasoline engine may not stop 
even if the vehicle is being driven by 
the hybrid battery (traction battery). 
If this continues for a few days, con-
tact your To yota dealer.
■Sounds and vibrations specific 
to a Hybrid Electric Vehicle
There may be no engine sound or 
vibration even though the vehicle is 
able to move with the “READY” indi-
cator is illuminate d. For safety, 
make sure to shift the shift lever to P 
and apply the parking brake when 
parked.
The following sounds or vibrations 
may occur when the hybrid system 
is operating and are not a malfunc-
tion:
●Motor sounds may be heard from 
the engine compartment.
●Sounds may be heard from the 
hybrid battery (traction battery) 
under the rear seats when the 
hybrid system starts or stops.
●Relay operating sounds such as a 
snap or soft clank will be emitted 
from the hybrid battery (traction 
battery), under the rear seats, 
when the hybrid system is started 
or stopped.
●Sounds from the hybrid system 
may be heard when the back door 
is open.
●Sounds may be heard from the 
transmission when the gasoline 
engine starts or stops, when driv-
ing at low speeds, or during idling.
●Engine sounds may be heard 
when accelerating sharply.
●Sounds may be  heard due to 
regenerative braking when the 
brake pedal is dep ressed or as 
the accelerator pedal is released.
●Vibration may be felt when the 
gasoline engine starts or stops.
●Cooling fan sounds may be heard 
from the air intake vent under the 
rear seat.
■Maintenance, repair, recycling, 
and disposal
Contact your Toyota dealer regard-
ing maintenance, repair, recycling 
and disposal. Do n ot dispose of the 
vehicle yourself.
When driving with the gasoline 
engine stopped, a sound, which 
changes in accordance with the 
driving speed, will be played in 
order to warn people nearby of 
the vehicle’s approach. The 
sound will stop when the vehicle 
speed exceeds approximately 
22 mph (35 km/h).
■Acoustic Vehicle  Alerting Sys-
tem
In the following cases, the Acoustic 
Vehicle Alerting System may be dif-
ficult for surrounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the Acoust ic Vehicle Alert-
ing System is installed on the front 
of the vehicle, it may be more diffi-
cult to hear from the rear of the vehi-
cle compared to the front.
■If “Proximity Notification Sys-
tem Malfunction Visit Your 
Dealer” is displayed on the 
multi-information display
The system may be malfunctioning. 
Have the vehicle inspected by your 
Toyota dealer.
Acoustic Vehicle Alerting 
System