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

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.


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Phillip

19 years of experience
310 reviews
Phillip
19 years of experience
Saab 900 L4-2.0L Turbo - Window is not working - Roseville, California
Even though it was really hot out he was very patient and thorough in his assessments. He explained everything in detail and was very knowledgeable.
Mazda MPV - Window is not working - Davis, California
Great guy who really made sure everything the car needed got done the right way. Wouldn't hesitate to follow up with him if or when future work is needed. Highly recommended!

Jamie

22 years of experience
91 reviews
Jamie
22 years of experience
Hyundai Sonata L4-2.4L - Window is not working - Alta Loma, California
Jamie was professional, reliable and polite. He was on time ans easy to work with. Quality work, would recommend.

Claud

8 years of experience
475 reviews
Claud
8 years of experience
Ford Thunderbird V6-3.8L - Window is not working - Macomb, Michigan
the diagnostic Claud made when he took the cover off my door, he could have made that same diagnostic without taking the cover off the door! It should have only taken him 15 t0 20 minutes to take the cover off and put it back on.$90 to tell me the motor and regulator need to be replace is not worst the price. I recommend you advise your customers with this problem, replace the motor and regulator, $443.00 and if it is less than that, that would be better than charging me $90.00 plus 443.00!

Brent

8 years of experience
56 reviews
Brent
8 years of experience
Dodge Journey V6-3.6L - Window is not working - Lithonia, Georgia
Brent arrived ahead of time and did a great job on the inspection. He gave me all the information I needed to know to get my truck fixed. I enjoyed his service. I will book him again.

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