Toyota Prius 2019 Manual page 739

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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. 650)
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Changing power switch modes
Release the brake pedal and press the power switch in step
hybrid system does not start and modes will be changed each time the switch
is pressed. (P. 243)
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When the electronic key does not work properly
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Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features: P. 780)
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Check if battery-saving mode is set. If it is set, cancel the function.
(P. 194)
WARNING
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When using the mechanical key and operating the power windows or
moon roof (if equipped)
Operate the power window or moon roof after checking to make sure that
there is no possibility of any passenger having any of their body parts
caught in the window or moon roof.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power window or moon
roof.
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8-2. Steps to take in an emergency
739
above. The
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