Skip the auto shop - Our mechanics make house calls

How Does the Power Windows Anti-Pinch Safety Feature Work?

Anti-pinch Safety

Closing your power window is as easy as pressing or pulling on the window switch until your window reaches the top. It only takes a few seconds to close the window, but those few seconds take the driver’s concentration away from the road. It is becoming increasingly common for power windows to have an express-up function so the driver can press the power window button and the rest of the process is automatic.

The danger of the power window express-up feature is if there is an obstruction preventing the window from closing all the way. It can cause damage whether that obstruction is:

  • A child’s arm, head or toy
  • A chunk of ice or snow
  • A piece of dirt or a stone stuck in the window track

When the window reaches the obstruction, it can cause bodily harm or the window can shatter if the obstruction is hard. To add a safety device to the express-up feature, car makers use an anti-pinch device. The window motor has a pressure sensor that detects window motor movement when the glass has stopped moving, even minutely. If this occurs, the window reverses direction and moves downward.

The anti-pinch feature is controlled by a small module which is now often integrated into the power window switches on the driver’s door. If the vehicle loses battery power or the power windows require a repair, the power windows will not know their upper and lower limits. The window motor will need to be re-trained so it can learn the window travel limits.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: How Does the Auto-Reverse Safety Feature Work on Car Windows?

Jam protection Jam protection is the term used by the manufacturers when discussing this safety feature. All power windows have a few parts in common. Window motor Window regulator Window switch Window glass Up relay Down relay ...

Q: How do I use the one-touch down window?

The one-touch down power window allows the driver to roll down the window all the way, with just a quick touch of the button. To use the one-touch down power window, press the driver’s Power Window switch down fully, and...

Q: What should I know about the seat-mounted and roof-mounted air bags?

Your Altima is equipped with a number of different air bags – it goes well beyond the front driver and front passenger system. You also have seat-mounted air bags and roof-mounted air bags. Here’s what you should know about each:...