General Information

The sunroof control module contains the logic for the opening and the closing of the sunroof based on the power sunroof multifunction switch, and the limit switch. The sunroof motor assembly contains the reversible DC drive motor, the gear train, and the limit switch.

The sunroof control module determines sunroof motor direction based on inputs received from the overhead console sunroof switches. When the Ignition switch is in the ON position or when Retained Accessory Power (RAP) is active, voltage is applied to the power sunroof module via the (RAP) system. The sunroof control module controls power sunroof motor direction by changing the polarity of the applied voltage. The sunroof control module remembers the sunroof position whenever the ignition switch is turned to the OFF position. The limit switch is used to tell the sunroof control module that the glass is parallel to the sheet metal, or the glass has reached the full travel position. The switch only supplies open circuits or grounds to the module. An internal pull-up resistor in the sunroof control module, connected to battery voltage, supplies the voltage at each input when the switch contacts are open.