Lincoln Nautilus: Roof Opening Panel / Roof Opening Panel - System Operation and Component Description. Description and Operation

System Operation

Roof Opening Panel Operating System

The accessory delay relay in the BCM supplies voltage through fuse F31 (10A) to the roof opening panel sliding glass motor and roof opening panel shield motor allowing the motors to respond to roof opening panel control switch commands. The BCM activates the accessory delay relay whenever the ignition is in the RUN or ACC positions, or for a specific time when the ignition is changed from RUN or ACC to the OFF position. The roof opening panel sliding glass motor and roof opening panel shield motor receive voltage from BCM fuse F27 (30A), and ground from G303 for motor movement. The roof opening panel switch is combined with the overhead console and is serviced with the overhead console. The switches apply a ground signal to the motors depending on the switch position and the motors respond accordingly. The roof opening panel switch receives ground from G403.

When the vehicle is in motion the BCM sends a PWM signal to the roof opening panel sliding glass motor which then will apply increased force while closing the roof opening panel sliding glass to reduce the possibility of bounce back.

Switch Operation

The roof opening panel is an electronically operated glass panel that can be opened, closed or tilted (vent position) by the roof opening panel control switch, the shield switch, and the vent switch. Actuating the switches supplies a signal to the roof opening panel glass and shield motor/module. The front sliding glass panel and the shield use two integrated motors/modules that are serviced as assemblies. The roof opening panel and shield has one-touch open and one-touch close features that are activated when the switch is pressed and immediately released (less than 0.5 seconds) on the open or close side of the switch. For manual control holding the switch depressed for more than 0.5 seconds will cancel one-touch operation and the sliding glass panel or shield will stop when the switch is released.

Shield Operation

When the shield OPEN switch is pressed and released the shield will automatically open and stop at the front of the roof opening panel fixed glass (comfort stop), leaving only the sliding glass panel exposed. Pressing and releasing the shield OPEN switch a second time (after the initial stop) will open the shield to the full open position. When the sliding glass panel is closed, the shield is open to any position beyond comfort stop and the shield CLOSE switch is pressed and released, the shield moves forward to the comfort stop position and stops. After stopping at the comfort stop position, pressing and releasing the shield Close switch again will fully close the shield. If the shield is in the closed position and the front sliding glass panel OPEN switch is pressed, the shield will perform a one-touch open operation automatically which will then be followed by the front sliding glass panel operation that was requested. To partially open or close the shield while it is moving, press shield OPEN or CLOSE switch again to stop the shield in the desired position.

Sliding Glass Panel Operation

When the front sliding glass panel OPEN switch is pressed and released the front sliding glass panel will automatically open and stop at a predetermined position before the fully open position (comfort position). Pressing and releasing the front sliding glass panel OPEN switch a second time (after the initial stop) will open the front sliding glass panel to the full open position. To fully close the front sliding glass panel, press and release the front sliding glass panel CLOSE switch. The front sliding glass panel will fully close. The front sliding glass panel movement can be stopped at any time in either direction by pressing the front sliding glass panel switch in either direction. The vent position can only be requested when the front sliding glass panel is in the fully closed position. To open to the vent position, press and release the vent switch. The front sliding glass panel will move to the vent position automatically. The front sliding glass panel can be fully closed from the vent position by pressing the front sliding glass panel CLOSE switch. If the shield is in the closed position and the front sliding glass panel OPEN switch is pressed, the shield will perform a one-touch open operation automatically which will then be followed by the front sliding glass panel operation that was requested. To partially open or close the front sliding glass panel from any position, press and hold the front sliding glass panel OPEN or CLOSE switch and release at the desired position.

Bounce Back - Front Sliding Glass Panel And Shield

The sliding glass panel and shield has a bounce back feature. If an obstacle has been detected as the front sliding glass panel or shield is closing, operation will automatically reverse and stop at a predetermined position.

Security Override

To override a bounce back condition (to overcome the resistance of ice on the front sliding glass panel seal for example), within 2 seconds of a bounce back event, press and hold the front sliding glass panel CLOSE switch. The front sliding glass panel will operate in manual mode with bounce back detection disabled until the switch is released.

Roof Opening Panel Fixed Glass

The roof opening panel system on this vehicle includes a fixed roof panel glass behind the front sliding glass panel. Any time this panel is removed or adjusted the front sliding glass panel will need to be initialized.
Refer to: Power Roof Opening Panel Initialization (501-17 Roof Opening Panel, General Procedures).

Comfort Stop

The roof opening panel will automatically close to approximately 8 in (20 cm) when driving above 35 mph (56 km/h) with the sliding glass panel open to reduce excessive wind noise. To override this feature to open the sliding glass panel to the desired position, press the OPEN or CLOSE switch. This feature only functions one time per key cycle.

Roof Opening Panel Motors - Glass and Shield

The roof opening panel motors contain integral electronics that control and monitor the glass or shield movement (for obstacle detection and one-touch operating features). The sliding glass panel motor and shield motor communicate to each other through a dedicated circuit within the roof opening panel jumper harness. The sliding glass panel motor and shield motor do not communicate to the vehicle network. The sliding glass panel and shield motors are the same but the shield motor connector pin 14 is connected to ground though the jumper harness to identify it as the shield motor within the configuration.

Jumper Harness and Communication

There is a jumper harness between roof opening panel C921 and both roof opening panel assembly motors (shield and front sliding glass panel motors) which includes a communication circuit that is used only for communication between the motors. If the communication circuit between the front sliding glass panel motor and shield motor is open or shorted the front sliding glass panel motor will only fully close the front sliding glass panel one time, then not operate. Also, if the communication circuit is open or shorted the shield motor will open fully, then only operate between fully open and the front of the fixed glass panel.

Roof Opening Panel Front Drain Hose Routing

Roof Opening Panel Rear Drain Hose Routing