The Power Sunroof System consists of the following components:

The power sunroof will operate with the ignition switch turned to Accessory or RUN, applying voltage through the sunroof accessory voltage circuit to the sunroof module. Once the ignition switch is turned to OFF the sunroof will continue to operate until any door is open or when the retained accessory power (RAP) has timed out. For a description and operation of the RAP operation, refer to Retained Accessory Power (RAP) Description and Operation in Computer/Integrating Systems.

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 the:

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

To open the power sunroof to the vent position from the closed position, turn the ignition to ON, with engine OFF. Momentarily press the sunroof switch rearward, this will apply the sunroof switch low reference to the sunroof switch open signal circuit (5-volt reference) input, pulling it to 0 volts. As long as the sunroof module only sees a single input request from the sunroof switch (open signal circuit), the module will automatically (express open) open the sunroof glass to the full vent position, 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 open. To stop the sunroof glass in a desired vent position other than full vent, press the sunroof switch again to stop express to vent.

The express open will work only with the glass in between the full vent and partial open positions. To express open the power sunroof, turn the ignition ON, with engine OFF. Momentarily press (less than 1.5 seconds) the sunroof switch rearward once, this will apply the sunroof switch low reference to the sunroof switch open signal circuit (5-volt reference) input, pulling it to 0 volts momentarily. The momentary 0 volts input to the sunroof module indicates an express open request. The sunroof glass will slide automatically (express open) above the roof, allowing the wind deflector to raise upward. 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, as the sunroof is expressing open, press the sunroof switch again (in either direction) to stop the movement.

To close the power sunroof, turn the ignition ON, engine OFF, and from the any position press and hold the sunroof switch forward. This will apply the sunroof switch low reference to the sunroof switch close signal circuit (5-volt reference) input, pulling it 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. The wind deflector will retract prior to the glass reaching the fully closed position. 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 position encoding system (PES) tracks the position of the glass through 2 limit switches:

The sunroof module monitors the limit switches, and based on the inputs, determines the position of the sunroof glass. As a limit switch closes, the 5-volt reference of either the sunroof limit switch range or soft stop signal circuit, depending on which limit switch is closed, 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 through the sunroof limit switch soft stop signal and sunroof limit switch range signal inputs.