2012 Toyota Prius Owners Manual - Page 820

5-2. Steps to take in an emergency Interior buzzer Exterior buzzer Warning message Details An attempt to lock the doors has been made using the smart key system while the electronic key is inside the vehicle. (vehicles with entry function) Correction procedure Once Continuous (Flashes) With the key inside the vehicle, a front door has been opened, the lock lever has been pulled in the lock direction, the door has been closed and an attempt has been made to lock the door. Take the electronic key outside the vehicle, and lock the doors again. 520