On the return of "self-opening" or "won't close" windows

Dave in Maine · Post by **Dave in Maine** » 22 Jul 2021, 17:30

You might recall, a couple weeks ago I started a thread on the driver's and passenger's windows on my 09 S60 having a tendency to "bounce back" on closing and reopen. viewtopic.php?f=9&t=97575 Thanks to the kindly folks here (and a YouTube with a Russian-accented voice synth) we were able to solve the problem.

Yay.

Then it came back.

I was stopped at a light and had the window open. Absentmindedly I ran my hand along the window frame. Doing this, i noticed that some of the plastic covering the inside of the window frame - "weatherstripping", for lack of a better word - had curled up and was not seated properly over the frame and into the channel. I took the minute or two needed to re-set the "weatherstripping" so it lay properly.

And that seems to have fixed the windows opening themselves, bouncing back, or doing whatever they want. They open when I click the switch, they close when I click the switch. They don't refuse to close or bounce back. So far.

Too simple and easy to be true, but there it is. Add it to your files.

domguy22 · Post by **domguy22** » 30 Jul 2021, 15:17

Thanks for the heads up Dave. Dealing with this issue right now but can't seem to see any problem with the sealing.

For anyone interested the sensor is apparently a current sensor/resistance measurement in the thermistor on the motor. When the motor binds up when the glass gets to the top/bottom the current spikes and the control unit tells it to back off a bit.

Post by **kcodyjr** » 07 Aug 2021, 07:55

This is a safety feature intended to prevent the window from closing on someone's hand. Weatherstripping bent into the path of the glass, or any other physical obstruction, would be indistinguishable from an unlucky finger.

In order to do this, it has to have an idea where the window is positioned at any given time: the top of the window's travel is also an obstruction that should produce exactly the same current spike.

That's why there's a calibration routine in VIDA. If your windows are obstruction-free, and they're still bouncing back down, try recalibrating.