Toyota 2008 Prius Quick Reference Manual page 6

BASIC HYBRID VEHICLE OPERATION
Smart Key system (if equipped)
Carrying a Smart Key allows the vehicle to be
locked, unlocked and the Hybrid System engaged
without handling the key.
Locking operation
Front door
Unlocking operation
Front door
NOTE: After unlocking, if a door is not opened
within 30 seconds, all doors will relock for safety.
Refer to your Owner's Manual and the following
section of this guide for Smart Key unlocking
programmable options.
Rear hatch
Push
Rear hatch
4
Push