Jam Protection Function

Last Updated on Fri, 11 Oct 2019 | Toyota Camry Repair

A jam protection function automatically stops the power window and moves it downward if a foreign object gets jammed in the door window during one-touch auto up operation.

The operation of the jam protection function is described below.

Door window distance from fully closed position	Operation
200 mm (7.87 in.) or more	Down operation of 50 mm (1.97 in.) or one second.
200 mm (7.87 in.) or less	Down operation until door window operation of 200 mm (7.87 in.) is reached or five seconds.

The worm gear and Hall IC in the power window motor assembly are used to enable the power window jam protection.

: Worm Gear

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The Hall IC converts the changes in the magnetic flux that occur through the rotation of the worm gear into pulse signals and outputs them to the power window ECU.

To control the jam protection function, the ECU determines the amount of movement and jamming of the window glass based on the pulse signals from the Hall IC.

^ Judgment of Movement and Jamming •

Hall IC1 Signal

Amount of Movement I of Motor 1 Revolution Sensor

Normal

Change in Amount of Movement of Motor 1 Revolution Sensor

Jammed

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