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

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

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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

18 years of experience
270 reviews
Phillip
18 years of experience
Saab 900 - 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!

Pedro

7 years of experience
16 reviews
Pedro
7 years of experience
Ford Mustang - Window is not working - Bakersfield, California
Excellent mechanic!!! Would recommend him to my family and friends.. On time and very creditable thank you Pedro for helping me

Matt

14 years of experience
84 reviews
Matt
14 years of experience
Hyundai Sonata - Window is not working - Scottsdale, Arizona
Matt was extremely communicative about the problem and quickly identified what was wrong. He talked me through what was being done, potential solutions, and helped me make a decision as to what work was to be performed. He had all necessary parts needed for related issues on hand preemptively so there was no waiting on any parts or pickup. I had same day repairs done with no issues scheduling at all. He was also very friendly, and a pleasure to talk to.

Attila

18 years of experience
626 reviews
Attila
18 years of experience
Honda Odyssey - Window is not working - Cranford, New Jersey
Upon arrival, he assured me he would conduct a thorough inspection to determine the source of the problem. He systematically investigated and was able to find and correct the issue. I was especially grateful because of the challenges that the corona virus would present if I had to take the car to a dealer. I have already scheduled additional work on my car due to the convenience and the expertise of the mechanic!

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