2004 Toyota Prius Owners Manual - Page 38

(g) Preventing the key from locked inside the vehicle being (i) Outside of effective range When the "POWER" switch is pressed, it is determined that the smart key is not in the vehicle. Inside alarm: One beep Warning light: On (for 5 seconds) (j) Open door warning When you attempt to lock all the doors using smart locking function with the hybrid system turned off but with any door open. Outside alarm: One beep (sounds for 10 seconds) Alarms will be turned off by either of the following operations: When you close the door with the hybrid system off but with the smart key left in the vehicle, and attempt to lock all the doors using smart locking function, it is determined that the smart key is in the vehicle. Outside alarm: One beep (sounds for 2 seconds) INFORMATION z This function may not operate when the smart key is left on the instrument panel, luggage cover, floor or in the glove box. z The function may operate if the smart key is brought outside but it is very close to the door window or door handle. (h) Low smart key battery When the hybrid system is turned to "ACC" or "OFF" about 20 minutes after the hybrid system is turned on or to "IG− ON", it is determined that the smart key battery voltage is low. Inside alarm: One beep D Closing all the doors D Pressing the " " (unlock) button on the smart key 26