Moveable Roof Control Module A (MRCMA)

The Moveable Roof Control Module A (MRCMA) is the primary electronic control unit for the convertible top system and communicates with the Moveable Roof Control Module B (MRCMB) and other modules over the MS-CAN or HS-CAN1 through the GWM. The Moveable Roof Control Module A (MRCMA) monitors all sensor inputs and all CAN messages relating to the convertible top and directly controls the convertible top using a motor. The Moveable Roof Control Module A (MRCMA) also contains a Hall-effect switch to detect convertible top movement and position (open, closed, moving).

The Moveable Roof Control Module A (MRCMA) and Moveable Roof Control Module B (MRCMB) use their internal Hall-effect switches and the MS-CAN to synchronize motor speed and direction.