The power sunroof system consists of the following components:

The sunroof control module monitors the sunroof switch input requests and based on the sunroof limit switch input combinations, 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 :

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

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

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

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, OPEN/VENT side, of the sunroof switch once. This will apply the sunroof switch low reference circuit to the sunroof switch signal open signal circuit, 5-volt reference input, pulling the reference voltage to 0 volts. 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 inputs from the limit switches. 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 the power sunroof press and hold the front portion, CLOSE side, of the sunroof switch. This will apply the sunroof switch low reference circuit to the sunroof close signal circuit, 5-volt reference input, pulling the reference voltage to 0 volts. The sunroof switch close signal input to the sunroof control module needs to have constant 0 volts 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 inputs from the limit switches. To close the sunshade, this will have to be manually slid closed.

The sunroof has a bi-directional motor. When the motor is not operating both circuits are grounded. When the motor drives the sunroof glass in the direction from the closed to vent or vent to open position, the following occurs:

When the motor drives the sunroof in the direction from the open to vent or vent to closed position, the following occurs:

The sunroof control module is equipped with a timer circuit which stops the operation of the sunroof motor after 8 seconds.

The sunroof limit switches track the position of the sunroof glass through 2 limit switches:

The sunroof control module monitors the limit switches and based on the input combinations, determines the position of the sunroof glass. As a sunroof limit switch closes, the 5-volt reference will be shorted to the sunroof limit switch low reference circuit, pulling the 5-volt reference to 0 volts.

The sunroof control module monitors both sunroof switch input requests and based on the sunroof limit switch input combinations, will control an output to the sunroof motor, to drive the sunroof glass to the requested position.