2012 Toyota Prius Owners Manual - Page 753

5-2. Steps to take in an emergency Follow the correction procedures. A buzzer sounds and a warning message is shown on the multi-information display. After taking the specified steps to correct the suspected problem, check that the warning message goes off. Warning message Details Correction procedure Indicates that one or more of the side doors is not fully closed The system also indicates which doors are not fully closed. If the vehicle reaches a speed of 3 mph (5 km/h), flashes Make sure that all the side doors are closed. and a buzzer sounds to indicate that the door(s) are not yet fully closed. Indicates that the back door is not fully closed If the vehicle reaches a speed of 3 mph (5 km/h), flashes Close the back door. and a buzzer sounds to indicate that the back door is not yet fully closed. 444