Toyota 2008 Prius Quick Reference Manual page 68

Locking and unlocking the doors (front door handles only)
PRIUS_U_(L/O_0802)
1-3. Opening, closing and locking the doors and back door
Press the lock button to lock the
door.
Grip the handle to unlock the
door.
Make sure to touch the sensor on
the back of the handle.
The door cannot be unlocked for
3 seconds after the door is
locked.
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