When I washed my new Prius for the first time I was surprised to find the driver’s door locking and unlocking when I ran the water on the door. It just kept locking and unlocking until I remembered the module was in my pocket. So that is something to remember when you wash or get your car washed.
The following paragraphs on pages 50 and 51 of the Prius Owners Manual warn about this: [FONT=Arial,Arial][FONT=Arial,Arial]The doors may unlock or lock if a large amount of water splashes on the door handle, such as in the rain or in a car wash when the electronic key is within the effective range. (The doors will automatically be locked after approximately 60 seconds if the doors are not opened and closed.)[/FONT][/FONT] [FONT=Arial,Arial][FONT=Arial,Arial]If the key is kept near the vehicle while it is being washed, water applied to a door handle may cause the door to lock and unlock repeatedly. In this event, place the key in a location 6 ft. (2 m) or more from the vehicle, taking care not to lose the key.[/FONT][/FONT] [FONT=Arial,Arial][FONT=Arial,Arial]If the key is inside the vehicle while it is being washed, water applied to a door handle may cause a buzzer to sound. In this event, locking all doors will cause the buzzer to stop sounding. [/FONT] [/FONT]