Why does the car window glass go up and then come down again?

[JesseFitz]

The reason the car window glass goes up and then comes down again is that the anti-pinch function is activated. Check if the rubber seal around the window is too dirty, causing increased resistance. Additionally, the window motor needs to have its position reset. To do this, raise the window to the top and then hold the up position for 10 seconds. The anti-pinch function works through tactile and visual detection. Tactile detection means when the car's power window mechanism senses an obstacle, it will stop raising the window and automatically lower it. This is triggered by the power window's current sensor. When the window pinches something, the electric motor slows down, the Hall sensor sends a signal to the ECU, the ECU instructs the relay to reverse the motor's current direction, causing the window glass to lower.