Convertible Top - System Operation and Component Description

TOP NOT SECURE – Displays when the vehicle occupants have raised convertible top, vehicle speed exceeds 5 km/h (3 mph) and the convertible top latch has not been fully engaged.

For additional information on the message center, Refer to: Message Center - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Component Description

Convertible Top Latch Switch

The convertible top latch switch is a Hall-effect style switch, the switch is activated by a magnet in the convertible top. When the convertible top is closed and fully latched, the Hall-effect switch closes and sends a signal to the Moveable Roof Control Module A (MRCMA).

Convertible Top Switch

The convertible top switch is a 3-position (UP, DOWN, NEUTRAL), momentary contact, rocker style switch.

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.

Moveable Roof Control Module B (MRCMB)

The Moveable Roof Control Module B (MRCMB) is the secondary electronic control unit for the convertible top system and communicates with the Moveable Roof Control Module A (MRCMA) over the MS-CAN and the BCM over the HS-CAN1 through the GWM. The Moveable Roof Control Module B (MRCMB) monitors one of the tonneau cover Hall-effect switches and MS-CAN messages from the Moveable Roof Control Module A (MRCMA) and directly controls the convertible top using a motor. The Moveable Roof Control Module B (MRCMB) also contains a Hall-effect switch to detect convertible top movement and position (open, closed, moving).

Tonneau Cover Switches

The tonneau cover switches are Hall-effect style switches, the switches are activated by a magnet located in each tonneau cover (1 magnet per cover). When the tonneau covers are installed, the Hall-effect switches close and send a signal to the Moveable Roof Control Module A (MRCMA) and the Moveable Roof Control Module B (MRCMB). One switch is hard-wired to each module.

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