The power sunroof system consists of the following components:

The power sunroof will operate with the ignition switch turned to Accessory or ON. 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 Retained Accessory Power.

Use the multifunction type sunroof switch, located in the front center of the headliner, to command the sunroof to :

The express open will only operate with the sunroof in the fully closed or partially open position. To express open the sunroof glass, momentarily press the OPEN portion of the sunroof switch to the second position once, for less than 1.5 seconds. This will apply the sunroof switch low reference circuit to both the sunroof switch express signal circuit and to the sunroof switch open signal circuit , 12 volt reference inputs, pulling them to 0 volts momentarily. The momentary transition inputs to the sunroof module indicates an express open request. Once the express open has been initiated, the sunroof module will control the motor to slide the sunroof glass in the open direction, slightly lowering the rear edge of the sunroof glass, then sliding open with the sunshade. The sunroof glass will continue to express open:

Opening the sunroof can be done from any position between fully closed and partially open. To open the sunroof glass, press and hold the OPEN portion of the sunroof switch to the first position. This will apply the sunroof switch low reference circuit to the sunroof switch open vent signal circuit 12 volt reference input, pulling the reference voltage to 0 volts. The constant low 0 volts input to the sunroof module indicates an open request. Once the open has been initiated, the sunroof module will control the motor to slide the glass in the open direction, slightly lowering the rear edge of the sunroof glass, then sliding open with the sunshade. The sunroof glass will continue to open until the sunroof motion is terminated by either:

Opening the sunroof glass, to the vent position, can be done when it is fully closed or in any partially open vent position. Press and hold the TILT portion of the sunroof switch. This will apply the sunroof switch low reference circuit to the sunroof switch open vent signal circuit, pulling the sunroof switch open vent signal circuit 12 volt reference input to 0 volts. The constant low input to the sunroof module indicates a vent request. Once the vent request has been initiated, the sunroof module will control the motor to slide the glass to the vent position, until the sunroof motion is terminated by either:

To close the power sunroof, press and hold either CLOSE portion of either sunroof switch. Holding the sunroof switch to the closed position will apply the sunroof switch low reference circuit to both the sunroof switch open signal and sunroof switch open vent signal circuits, pulling both 12 volt reference inputs to 0 volts. The constant low inputs to the sunroof module indicates a close request. As the close request has been initiated, the sunroof module will control the motor to slide the glass to the closed position until the limit switch closes, indicating a flush close position. As the sunroof glass nears the closed position the rear sunroof glass will raise slightly, then seats to flush with the roof panel. To close the sunshade, this will have to be manually slid closed.

If either the OPEN or TILT switch is closed for more than 30 seconds, the sunroof module considers the switch to be a stuck switch, leaving the sunroof glass inoperative in the either a vent or open position. Under these conditions only, the sunroof is allowed to close from any position. Once the closed position is obtained, no further sunroof operation is allowed until the stuck switch is opened or power is cycled to the sunroof module.

The sunroof has a 12 volt reversible DC motor, gear train and a limit switch. When the motor is not operating both circuits are at ground potential. When the motor drives the sunroof glass in the open direction, from the vent position to the open position, the following occurs:

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

The limit switch is part of the sunroof motor assembly and is to signal the sunroof module when the sunroof glass is closed flush with the roof or when it reaches the comfort stop during the express open feature.

As the limit switch closes, the sunroof limit switch low reference circuit is applied to the sunroof limit switch soft stop signal circuit, pulling the 12 volt reference down to 0 volts. The 0 volts at the sunroof limit switch soft stop signal input indicates that the sunroof glass has either reached the flush close or the comfort stop position and that the sunroof module will remove voltage from the motor control circuits.