2008 Toyota Prius Owners Manual - Page 112

1 -7 . T he ft de t e rre nt syst e m I m m obilize r syst e m The vehicle's keys have built-in transponder chips that prevent the hybrid system from starting if the key has not been previously registered in the vehicle's on-board computer. Never leave the keys inside the vehicle when you leave the vehicle. 1 Vehicle with smart key system: The indicator light flashes after the "POWER" switch has been turned OFF to indicate that the system is operating. Vehicles without smart key system: The indicator light flashes after the key has been removed from the "POWER" switch to indicate that the system is operating. Before driving 81 PRIUS_U_(L/O_0802)