The power sunroof system consists of the following components:

Battery positive voltage is supplied at all times to the sunroof motor/actuator assembly from the 25 A S/ROOF fuse located in the rear fuse block. This voltage is used to power the sunroof motor. Accessory voltage is applied to the sunroof motor/actuator assembly from the 10 A RAP fuse also located in the rear fuse block. This voltage is used to power the logic within the motor/actuator assembly and to allow sunroof operation only with the ignition in the run or accessory positions. Ground is supplied to the sunroof motor/actuator assembly through the ground circuit and G403.

Ground is supplied to the sunroof switch through the switch ground circuit and G402.

The Power Sunroof System will operate only with the ignition turned to the RUN or Accessory positions, this allows for retained accessory power (RAP) control of the sunroof. Once the ignition switch is turned to 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 of RAP operation, refer to Retained Accessory Power (RAP) Description and Operation .

The sunroof switch assembly contains two rocker type switches that are used to control the following sunroof functions:

When the sunroof express open switch is pressed to the second detente, the roof will open to the comfort stop position, approximately ¾ of the full open position. Press the roof express open switch a second time, the roof will then move to the full open position.

The sunroof switch can be used to control roof movement in an assortment of different ways from any one of the following positions:

The roof express or vent express features allow for movement of the roof glass to desired positions in unsupervised modes. When the roof or vent open switch is momentarily pressed rearward to the second detente, the roof/vent open and roof/vent express signal circuits are simultaneously pulled low through the switch contacts signaling the sunroof motor/actuator assembly of the roof/vent express open request. The logic in the motor/actuator assembly then commands the motor to move the roof glass to the requested position. To stop the roof in a desired position during the express mode, momentarily press the sunroof switch in either direction.

The roof/vent express close feature is similar to the roof/vent express open feature, except that the roof/vent close switch signal circuit is simultaneously pulled low with the express signal circuit. The sunroof motor/actuator assembly will then command the motor to move the roof glass to the closed position.

Supervised operation of the power sunroof system allows for the roof to be moved to a specific or desired position. When you press and hold the desired roof or vent open switch to the first detente of the switch, the roof/vent open switch signal circuit is pulled low through the switch contacts signaling the sunroof motor/actuator assembly of the roof/vent open request. The motor/actuator assembly then commands the motor to move the roof glass towards the open position until the switch is released. Closing the roof glass works similar to opening the roof, except that the roof/vent close switch signal circuit is pulled low signaling the motor/actuator assembly of the roof close request.

The sunroof motor/actuator assembly has a bi-directional motor. The sunroof motor understands when it has driven the sunroof glass to the vent, close, and full open positions based on the internal hall effect sensors within the motor/actuator assembly. It interprets the hall effect sensor combinations and controls the sunroof motor to soft stop the sunroof glass at the open and closed positions.