How Does the Power Windows Auto-Reverse Safety Feature Work? | YourMechanic Advice

How Does the Power Windows Auto-Reverse Safety Feature Work?

When you roll up the power windows on your car, you can lift the power window switch and hold it until the window reaches the top. It only takes seconds but that can be a distraction for you as the driver that takes your eyes off the road. Car designers came up with a solution - express-up window switches.

Express-up window switches

Some vehicles have express-up window switches. When the switch is pressed to lift the window to the top, fully closed position, it only requires a single press of the button. The driver can release the button and the window will automatically continue to the top without anymore required input. Express-up window switches are most commonly used on the driver’s controls, though a few higher trim line vehicles implement express-up window switches in the passenger locations as well.

Express-up safety device

The problem with express-up windows is that there is a possibility of an obstruction in the window that you are not paying attention to. For example, you may use the express-up power window button to roll the rear window up while your child decides to put their arm out the window. A safety device is needed to prevent a crushing injury.

There is a safety device that goes along with all express-up window switches known as auto-reverse. This device uses a sensor on the power window motor to detect if there is extra stress on the motor before it reaches its upper limit. If it detects an obstacle in the way, it triggers the anti-pinch function and reverses the window direction. It will either roll the window completely down, or roll down a few inches and stop.

Though it is part of the anti-pinch system for your power windows, the window motor will still exert enough force to bruise you. You should still be very cautious about preventing obstacles and appendages from getting caught in a closing window.

The auto-reverse function needs to know the top and bottom of the window’s travel, and it will need to be re-learned if the:

  • Battery goes dead
  • Power window motor is replaced
  • Window glass is replaced
  • Fuse for the power windows burns out

When the auto-reverse function is not programmed, it does not detect that it has reached the top of its travel and rolls back down as if it has reached an obstacle. You will not be able to close your window using the express-up feature if the limit needs to be re-learned.


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11 years of experience
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Bryant
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Bryant has done great work on my car before, the latest work is no exception. He's very flexible, and goes the extra mile to get you back on the road.
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This is my first time using this service. I am very happy with it. Bryant was very knowledgeable and did quality work. I will use this service more regularly.

Augustine

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Augustine
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He’s amazing! Did a wonderful job on my brakes and was extremely knowledgeable, and a real fun guy to be around as well!

Jimmi

25 years of experience
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Jimmi
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Jimmi was wonderful. He was on time, knowledgeable, and completed work in a timely manner. He went above and beyond with helpful tips and recommendations. We will be using him for all our family vehicles.

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Came right on time! Had all the necessary tools to finish the job. After the test drive, he gave me an update on my car. Topped off my fluids and disinfect the inside. Well recommend!!

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