Sunroof - Operation

OPERATION

This vehicle has a vent, tilt and slide power sunroof system with express (one-touch) open and closing feature. The sunroof system receives constant battery feed through a fuse in the Power Distribution Center (PDC). The sunroof will operate normally with the key in the "RUN" or "ACCESSORY" position. If the sunroof is moving when the key is turned to the START position (crank engine), all motions will stop. The sunroof will also stop a requested motion if the key is turned "OFF".

A combination push-button and rocker switch module mounted in the overhead console controls sunroof operation. The sunroof switch is a rocker design with a push button in the center of the two halves of the rocker. Pressing the rocker towards the front of the car commands the sunroof closed. Pressing the rocker towards the rear of the car commands the sunroof open. Pressing the center push button commands the sunroof up into the vent position (Rear of sunroof glass raises above the vehicle roof with glass still covering the sunroof opening). All switch commands operate with the glass starting in any position. Sunroof Switch - Operation for additional information.

An electronic control system, integral to the motor/module assembly, provides the express open and close functions. During express opening, the sunroof glass panel will first open to the "Comfort Stop" position. A second press of the "OPEN" button on the rocker switch will move the glass panel to the full open position. Pressing the "close" end of the rocker switch moves the sunroof glass panel to the full closed position. During express closing, anytime an obstacle is detected in the way of the glass, the motor will stop and reverse travel to avoid pinching an occupant's finger, ice in the track, etc. This function is called Excessive Force Limitation (EFL). There are two methods of overriding the EFL function.

1. When three EFL events occur without the glass being allowed to fully close, the next close attempt will only move while the close switch is continuously actuated. This allows the sunroof to be forced closed if multiple close attempts fail.
2. If the sunroof close switch is continuously actuated during an EFL event, through the reversal, and during a two second wait time, then continuing to hold the close switch will cause the roof to move towards close with the EFL protection disabled. This allows the sunroof to be forced closed if it is known that a reversal will occur. This secondary EFL override may be necessary when known debris (ice blockage for example) is preventing the glass panel from closing.

While in EFL override, the closing motion will cease if the sunroof switch is released at any time.