The main function of inner door module include : door lock & release, window glass lift and down , and anti-pinch function through window regulator and motor electronic module, its wire harness connecting to the center control system of car, realizing the control of loudspeaker on the inner door panels, mirror adjustment and heating function, which belongs to the automobile interior-parts. The inner module is installed in the inner side of the door. The window regulator system is divided into power, with control module, and manual, the manual window regulator is now being phased out. The inner door module with electronic control have anti-pinch function and remote window glass lift and down function, making the driver feeling more convenient and safty.