I bought some Weathertech wind deflectors for my 2005 Prius. The driver’s window has an ‘automatic’ feature on the switch. Lift the switch and release, and the window goes up on its own without having to hold the switch. (Same goes for down, of course.) This useful feature has been ubiquitous on cars for some time now. For safety the window, when being raised on automatic, stops and reverses direction if it comes up agains an obstruction. While the window operates normally on the SO’s 2000 Tacoma with the deflectors installed, the deflectors cause the window in the Prius to detect an obstruction. I can’t ‘flip and forget’; I need to raise the window by holding the switch in the manual position.
I tried using the instructions in this video. After a few tries I was able to get the window to stop coming down – but then the window would not come down! That is, it no longer reversed when it came upon the ‘obstruction’, but it would also not come down when I pushed the switch down. Since the car was due for routine maintenance anyway, I decided to take the deflector off and let a Toyota dealer put them on.
I picked the car up after work and tried the driver’s window. Came down all right. When I raised it, it went up and then came halfway down. See… This is what I didn’t want to happen, and why I decided to let the dealer deal with it. The service guy said, ‘Didn’t anyone tell you about this? You have to stop at the first detent and raise the window manually.’ I asked about resetting the sensor, and he said it’s only when your battery dies that you need to reset. ( 
) He demonstrated by going through a slightly different routine from the video (he held the switch up for 10 seconds), and showed that the sensor cannot be ‘adjusted’; the window reaches the deflector, and the sensor senses it. He said the sensor is built into the motor and that it’s not adjustable.
I don’t believe him. Even though Toyota, and Japanese automakers in general, build their cars to good tolerances, there needs to be some way to adjust for variances or possible variances. Weathertech says that the sensors are adjustable. The English guy in the video says the sensors are adjustable. Was the service guy right? Or is there a procedure that will allow me to use the ‘auto’ feature on the driver’s window?