Power Sunroof And Sunshade Motor With An On-Board Control Module

The dual pane power sunroof sliding glass panel and power sunshade motors both receive battery feed through a fused B(+) circuit from the Power Distribution Center (PDC). However, the on-board electronic module of each sunroof or sunshade motor monitors an input on a fused ignition circuit and is configured to allow the power sunroof and the power sunshade to be operated only when the ignition is set to the ON.

The integrated sunroof motor electronics are programmed to operate only one motor at a time (sunshade and glass cannot simultaneously operate). The two motors communicate switch input information as well as sunroof and sunshade position information with each other through a serial bus circuit, but do not communicate with any other electronic modules in the vehicle. The integrated motor electronics are programmed to automatically move the sunshade from the closed to mid-open position before allowing the sliding glass panel to open or vent. Likewise, if the sunshade switch is pressed to close the sunshade while the sliding glass panel is in an open position, the integrated motor electronics are programmed to automatically close the glass panel before closing the sunshade.

The integrated sunroof motor electronics provide an obstacle detection feature for both the sliding glass panel and the sunshade that is active during express close operation. The motor electronics monitor motor closing load through motor speed. When an obstacle is detected due to a significant decrease in motor speed, the electronics will stop the motor closing motion and automatically reverse the motor direction to allow the obstacle to be removed. for options to override the obstacle detection system. Refer to SUNROOF OR SUNSHADE OBSTACLE DETECTION OVERRIDE .

The integrated sunroof motor electronics provide a thermal protection feature to protect the motors from overheating. If the sunroof is cycled repeatedly open/close enough to cause motor overheating the thermal protection will engage and the sunroof will stop responding to further switch inputs. Once a motor has cooled sufficiently normal operation will be automatically restored. However, the ignition switch must remain in the ON mode so that the module remains awake long enough to monitor the cool down of the motor.

The integrated sunroof motor electronics monitors glass panel and power sunshade positions by counting motor rotations through integrated hall effect sensor output. If a motor is removed and re-installed or a new service motor is installed the Initialization procedures must be followed to reset and calibrate the electronics with the sunroof glass and sunshade positions. Refer to DUAL PANE SUNROOF CALIBRATIONS .