The power sunroof system consists of the following components:

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, press the rear portion (OPEN/VENT side) of the 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 module receives the input request from the sunroof switch (open signal circuit), the sunroof module will control the sunroof motor to raising the rear of the glass upward. The sunroof glass will stop (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 glass in between the full vent and partial open positions. 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 module receives the input request from the sunroof switch (open signal circuit), the sunroof module will control the sunroof motor to automatically (express open) slide the sunroof glass above the roof. The sunroof glass will stop (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, press the sunroof switch again in 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 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 stop (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 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 glass through two limit switches:

The sunroof module monitors the limit switches and based on the inputs 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 module understands the position of the sunroof glass based on the different input combinations from the soft stop and vent stop limit switches.