Sunroof Description and Operation

Sunroof Description and Operation

Power Sunroof System Components

The power sunroof system consists of the following components:

• / Sunroof control module, with sunroof motor and internal hall effect sensors
• / Sunroof switch
• / Sunroof glass-spoiler type, with glass sliding above roof
• / Sunshade
• / Rail and track assembly upon which the sunroof glass rides
• / Power sunroof system circuit breaker: SUNROOF 20A
• / Ground: GXXX

Power Sunroof Operation

The sunroof control module monitors the sunroof switch input requests and based on the internal hall effect sensors, will control an output to the sunroof motor, to drive the sunroof glass to the requested position. The power sunroof will operate with the ignition switch turned to RUN. Use the rocker type sunroof switch, located in the front center of the headliner, to command the sunroof to :

• / Vent
• / Express Open
• / Close

Pressing the sunroof switch rearward, the sunroof glass will slide from:

• / Closed position to the vent position.
• / Vent position to the open position.

Pressing the sunroof switch forward, the sunroof glass will slide from:

• / Open position to the vent position.
• / Vent position to the closed position.

Open to Vent

To open the power sunroof to the vent position from the closed position, momentarily press the rear portion, of the sunroof switch. This will apply the sunroof switch low reference circuit to the sunroof open signal circuit, 5volt reference input, pulling the reference voltage to 0volts. Once the sunroof control module receives the input request, the sunroof control module will control the sunroof motor to raise the rear of the sunroof glass upward. The sunroof glass will soft stop at the full vent position based on the internal hall effect sensors. The sunshade will have to be manually slid closed.

Express Open

The express open will work only with the sunroof glass in the full vent or any partial open position. To express open the power sunroof, momentarily press the rear portion, of the sunroof switch once. This will apply the sunroof switch low reference circuit to the sunroof switch signal open signal circuit, 5volt reference input, pulling the reference voltage to 0volts. Once the sunroof control module receives the input request, the sunroof control module will control the sunroof motor to express open, automatically sliding the sunroof glass above the roof. The sunroof glass will soft stop at the full open position based on the internal hall effect sensors. As the sunroof glass expresses open so will the sunshade. To stop the sunroof glass in a desired position other than to the express open position, during the express open operation, momentarily press the sunroof switch again, either direction, to stop the movement.

To Close

To close the power sunroof press and hold the front portion, of the sunroof switch. This will apply the sunroof switch low reference circuit to the sunroof close signal circuit, 5volt reference input, pulling the reference voltage to 0volts. The sunroof switch close signal input to the sunroof control module needs to have constant 0volts applied, switch pressed, to allow the motor to continue to drive the sunroof glass, past the vent position, until it reaches the closed position. The sunroof glass will soft stop at the closed position based on the internal hall effect sensors. To close the sunshade, this will have to be manually slid closed.

Sunroof Motor

The sunroof motor is part of the sunroof control module, which is serviced as one part.

Hall Effect Sensors

The hall effect sensors are internal to the sunroof control module. The sunroof control module monitors the hall effect sensors to control the movement and soft stops of the glass at the vent, full open and flush closed positions.