Toyota Prius V 2016 Manual page 537

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Stopping the hybrid system
Set the parking brake, shift the shift position to P and press the power switch
as you normally do when stopping the hybrid system.
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Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 461)
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Changing power switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and press
the power switch.
The hybrid system does not start and modes will be changed each time the
switch is pressed. (P. 176)
PRIUS v_OM_OM47B12U_(U)
8-2. Steps to take in an emergency
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