Toyota Prius 2011 Manual page 31

Sounds and vibrations specific to a hybrid vehicle
■
There may be no engine sounds or vibration even though the vehicle is able
to move. Always push the "P" position switch when parked.
The following sounds or vibrations may occur when the hybrid system is
operating, and are not a malfunction.
●
Motor sounds may be heard from the engine compartment.
●
Sounds may be heard from the hybrid battery (traction battery) behind
the rear seat when the hybrid system starts or stops.
●
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 driving at low speeds, or during idling.
●
Engine sounds may be heard when accelerating sharply.
●
Sounds may be heard due to regenerative brake when you press the
brake pedal or release the accelerator pedal.
●
Vibration may be felt when the gasoline engine starts or stops.
●
You may hear cooling fan sounds coming from the air intake vents behind
the rear seat.
Maintenance, repair, recycling, and disposal
■
Contact your Toyota dealer regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.
1-1. Hybrid system
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