Sunroof / Moonroof: Description and Operation

Sunroof Description and Operation

Power Sunroof System Components

The Power Sunroof System consists of the following components:

* Sunroof module

* Sunroof switch

* Sunroof glass

* Rail and track assembly upon which the sunroof glass rides

* Sunroof sunshade panel

* S/ROOF Fuse 30A

* Ground G200

Power and Grounds

Battery positive voltage is supplied at all times to the sunroof module from the 30 A S/ROOF fuse located in the underhood fuse block. Ground is supplied to the sunroof module through the module ground circuit and G200.

Ground is supplied to the sunroof switch through the switch ground circuit and G200.

Power Sunroof Operation

The Power Sunroof System will operate only with the ignition turned to the RUN or Accessory position, this allows for retained accessory power (RAP) control of the sunroof through the body control module (BCM). With the ignition in the run or accessory position, the BCM supplies the sunroof with ignition voltage which allows sunroof operation. Once the ignition switch is turned off the sunroof will continue to operate until any door is opened or when the RAP timer reaches its shut-off limit. For a description and operation of the RAP operation, refer to Retained Accessory Power Description and Operation Retained Accessory Power.

Sunroof Module

The sunroof module consists of an internal motor and the necessary logic needed to accept commands from the sunroof switch. The sunroof module supplies voltage to the sunroof switch and monitors this voltage. When the sunroof switch is activated the switch signal circuit is pulled low and the motor will move the sunroof glass in the corresponding direction.