Sunroof Motor/Module (SHD)

The motor is powered to open, close and lift the sunroof panel. The motor contains two hall effect sensors that monitor the motor shaft rotation providing sunroof panel position.

The hall sensors also provide the end limit cut out function for the SHD once the system is initialized. The SHD counts the pulses and cuts the motor out prior to the detected end run of the sunroof panel.

Fig 1: Identifying Sunroof Motor/Module

Courtesy of BMW OF NORTH AMERICA, INC.

The combined motor module has a pin connector for interfacing the switch, and vehicle harness (power, ground and Bus.)

The electronic controls and relays are contained in the sunroof module (PM-SHD). The module is connected to the P-Bus (E38 >99 MY on the K-Bus) for comfort closing and opening as well as diagnosis/fault memory purposes.

Fig 2: Sunroof Motor Circuit

Courtesy of BMW OF NORTH AMERICA, INC.