Toyota Prius, Manual

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1-1. Plug-in hybrid system
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PRIUS PHV_OM_OM47831E_(EE)
 Sounds and vibrations specific to a hybrid vehicle
There may be no engine sounds or vibration even though the vehicle is able
to move. For safety, apply the parking brake and make sure to shift the shift
position to P when parked.
The following sounds or vibrations may occur when the hybrid system is
operating, and are not a malfunction.
 The brake system operation sound heard from the front of the vehicle
when the driver’s door is opened.
 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 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 braking when you press the
brake pedal or release the accelerator pedal.
 Vibration may be felt when the gasoline engine starts or stops.
 Cooling fan sounds may be heard from the air intake vent. (
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P. 61)
 The operation sound of the air conditioning system (air conditioning com-
pressor, blower motor).
 Maintenance, repair, recycling, and disposal
Contact any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.