Toyota PRIUS 50 2020 Series, Owner'S Manual

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1-3. Hybrid system
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Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to
move with the “READY” indicator is illuminated. 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:
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Motor sounds may be heard from the engine compartment.
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Sounds may be heard from the hybrid battery (traction battery) under the
rear seats when the hybrid system starts or stops.
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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 sys-
tem is started or stopped.
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Sounds from the hybrid system may be heard when the back door is open.
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Sounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
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Engine sounds may be heard when accelerating sharply.
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Sounds may be heard due to regenerative braking when the brake pedal is
depressed or as the accelerator pedal is released.
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Vibration may be felt when the gasoline engine starts or stops.
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Cooling fan sounds may be heard from the air intake vent. (
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Maintenance, repair, recycling, and disposal
Contact your Toyota dealer regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.