The principle of automobile electric door and window switch

The movement of the power window is controlled by the main switch in the main power window switch. When the main switch is in the OFF position, only the windows of the driver’s door can be opened or closed. When the main switch is in the ON position, all the windows can be controlled by The main power window switch or the window switch in the door can be opened or closed. The driver's window switch has an automatic lowering mode, which can be activated by pressing the switch button to the second position.

The power window is pulled by a reversible motor, and each motor is protected by a built-in circuit breaker. If the window switch is opened for too long (the window is obstructed or after the upper and lower limits), the circuit breaker will disconnect the circuit and wait for it to cool down again. Automatic reset. When the ignition switch is in the RUN or START position, or after 10 minutes in the OFF position, the integrated controller supplies power to the coil voltage of the power window relay, the relay contact is closed, and the voltage goes to the power window main switch and the window switch in the door .

1. Driver window

When the ignition switch is in the RUN or START position, the voltage passes through the integrated controller to the power window relay coil, the power window relay contact is closed, and the voltage goes to the driver’s power window switch. When the driver side switch is turned to the Auto Down position, the voltage passes through the driver’s window The switch leads to the power window motor. When the motor is running, the controller will receive pulses from the pulser input signal. When the window is fully lowered, the motor stops, and the pulser no longer generates pulse signals. After that, the voltage is no longer sent to the power window motor.

2. The window next to the driver

When the ignition switch is in the RUN or START position, or after 10 minutes in the OFF position, the integrated controller will turn on the power window relay voltage, the relay contact will close, and the voltage will go to the power window switch next to the driver. When this switch is in the UP position , The voltage is applied to the main power window motor, and the motor rides the railway and loops back through the driver’s power window switch. When the switch is set to the UP position and not released, the power window motor always pushes the window up; when it is set to the DOWN position, the voltage is The direction is reversed. When DOWN is pressed and not released, the motor will move the window down.

3. Passenger window

10 minutes after the ignition switch is turned OFF in the RUN position, the voltage is sent to the power window relay coil by the integrated controller, the power window relay contact is closed, and the voltage is supplied to all the window switches. When one of the main dashboard switches is turned on When the time, the passenger window can be controlled by the door switch or the main dashboard. When the front right door and window switch is adjusted to UP, the voltage goes to the front right power window motor. The motor is grounded through the right front power window switch and the main dashboard switch contact. The window will rise until the UP position is released, such as turning the right front Turn the door and window switch to the DOWN position, and the voltage will lead to the opposite direction; the window will move down until the DOWN is released. The operation of other windows is similar.