Lincoln Navigator: Roof Opening Panel / Roof Opening Panel. Diagnosis and Testing

• GO to Pinpoint Test B

• GO to Pinpoint Test E

• GO to Pinpoint Test G

• GO to Pinpoint Test A

• GO to Pinpoint Test C

• GO to Pinpoint Test D

• GO to Pinpoint Test F

Normal Operation and Fault Conditions

During normal operation the sunroof seals against the roof opening tightly and evenly preventing wind noise. Any variation in alignment or failure to seal will cause wind noise.

Possible Sources

• Incorrect roof opening panel alignment
• Roof opening panel glass seals

Visual Inspection and Pre-checks

• Roof opening panel seals

• Check the roof opening panel glass seals for:
  • looseness
  • cracking
  • pinching
  • obstructions

• Ignition ON.

• Open and close the roof opening panel glass.

• Check the alignment of the roof opening panel glass after closing.

Normal Operation and Fault Conditions

When the roof opening panel glass is completely closed, it is flush with the roof panel. The roof opening panel weatherstrip provides a seal against adverse weather conditions such as rain and wind, preventing them from entering the passenger compartment. A damaged, deformed or incorrectly installed weatherstrip is unable to seal the glass efficiently. The roof opening panel trough assembly and drain hoses provide a route for water to drain away from the opening panel, damaged or obstructed drain hoses or trough assembly will allow water to collect and possibly leak into the passenger compartment.

Possible Sources

• Incorrect roof opening panel glass alignment
• Roof opening panel drain hoses
• Roof opening panel glass seals
• Damaged roof opening panel frame
• Incorrect position of the roof opening panel glass

Visual Inspection and Pre-checks

• Roof opening panel seals

• Make sure the customer is parking with the roof opening panel correctly in the closed position.

• Make sure the roof opening panel glass is centered and flush with the roof line.

NOTE: The seal has a bonded joint located on the passenger side or rear edge. This is not a defect.

• Check the roof opening panel seal for position, deformation, cracks, tears, or looseness.

• Check the roof opening panel rear trough for damage. Check the water trough and guides for damage and/or correct attachment and function.

• Make sure the drain hoses are all connected and not cracked, slit, pinched or obstructed.

NOTE: Drain hoses must flow downhill and cannot be pinched or restricted by headliner or any other trim components.

• With the panel open, slowly pour water into the water trough area and make sure that the same amount of water exits the vehicle at the bottom of the A and C-pillars.

• Check drain hoses for obstructions by blowing compressed air through the drain spouts in the water trough area, then retest with water.

• Check the roof opening panel frame for damage that may cause the roof opening panel seal to seat incorrectly.

Normal Operation and Fault Conditions

When the roof opening panel glass is completely closed, it is flush with the roof panel. All components should be secured correctly. The roof opening panel system is made up of many components that require specific torque specifications and correct installation in order to avoid any NVH concerns. Over time, components may become loose or damaged, fasteners may become loose, sound insulating material may wear out and foreign material may collect in the roof opening panel frame. It is possible that one or more of these conditions may lead to a rattle concern in the roof opening panel system.

Possible Sources

• Incorrect roof opening panel glass alignment
• Roof opening panel lifter assemblies
• Roof opening panel tracks
• Roof opening panel drain channels and guides
• Roof opening panel shield (sunshade)
• Roof opening panel assembly

Visual Inspection and Pre-checks

• Roof opening panel glass
• Roof opening panel lifter assemblies
• Roof opening panel trough
• Roof opening panel air deflector assembly
• Roof opening panel seal
• Roof opening panel shield (sunshade)

• Check the roof opening panel glass during operation.

• Open the roof opening panel glass.

• Check the tracks for obstructions or signs of damage.

• Check the drain channel and channel guides for any loose fasteners or obstructions.

• Check the shield (sunshade) for correct installation.

• Make sure the roof opening panel frame, drain tubes and wire harnesses are free from obstructions and damage, and are securely fastened.

Normal Operation and Fault Conditions

When the roof opening panel glass closes, it should do so quietly and smoothly. The roof opening panel system is made up of many components that require specific torque specifications and correct installation in order to avoid any NVH concerns. Over time, components may become loose or damaged, fasteners may become loose, sound insulating material may wear out and foreign material may collect in the roof opening panel frame. It is possible that one or more of these conditions may lead to a noise concern in the roof opening panel system.

Possible Sources

• Incorrect roof opening panel glass alignment
• Roof opening panel tracks
• Roof opening panel shield (sunshade)
• Roof opening panel motor

Visual Inspection and Pre-checks

• Roof opening panel obstructions
• Roof opening panel lifter assemblies
• Roof opening panel shield (sunshade)
• Roof opening panel motor

• Check the roof opening panel for any obstructions and damage.

• Check the roof opening panel glass during operation.

• Open the roof opening panel glass.

• Check the roof opening panel tracks for obstructions and damage.

• Check the roof opening panel shield (sunshade) for correct movement.

• Gain access to the roof opening panel motor.

• Open the roof opening panel.

Normal Operation and Fault Conditions

The roof opening panel motor receives battery voltage at all times from BCM fuse F27 (30A), and receives ignition voltage (accessory delay) from BCM fuse F23 (10A). The roof opening panel motor and switch are grounded at G303. When the roof opening panel open switch is pressed, a ground signal is sent to the roof opening panel motor on the sunroof open circuit. When the roof opening panel close switch is pressed, a ground signal is sent to the roof opening panel motor on the sunroof close circuit. When the roof opening panel tilt switch is pressed, a ground signal is sent to the roof opening panel motor on the tilt/vent switch circuit. The motor responds to these signals dependant on the sliding glass panel and shield positions. One touch operation is accomplished by pressing any of the switches for less than 1 second. For more information on the operation, REFER to: Roof Opening Panel - System Operation and Component Description (501-17 Roof Opening Panel, Description and Operation).

There is a communication circuit between the shield motor (sunshade) and the sunroof motor for back and fourth communication between the 2 motors only, and not for diagnostics. If the communication circuit between the sunroof motor and shield motor is open or shorted the sunroof motor will operate only to fully close the sliding glass, and the shield motor will not operate at all.

Possible Sources

• Fuses
• Wiring, terminals or connectors
• Roof opening panel motor/module assembly
• Roof opening panel control switch

Visual Inspection and Pre-checks

• BCM fuse F23 (10A)
• BCM fuse F27 (30A)

• Ignition ON.

• Attempt to operate the power windows.

• Press and hold the shield (sunshade) open switch until the shield (sunshade) is fully opened.

• Press and hold the shield (sunshade) close switch until the shield (sunshade) is fully closed.

• Check the roof opening panel glass operation.
  • Press and release the glass open switch. The glass should fully open in the one-touch open mode. If not, press and hold the glass open switch to fully open the glass.
  • Press and release the glass close switch. The glass should close fully in the one-touch close mode. If not, press and hold the glass close switch to fully close the glass.
  • Press and release the vent switch. The glass should move to the vent position. If not, press and hold the vent switch to fully vent the glass.

• Ignition OFF.

• Disconnect Sunroof Motors C921A and C291B .

• Disconnect Roof Opening Panel Control Switch C930 .

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-6		Ground
  C921A-7		Ground

• Ignition OFF.

• Measure:
  Click to display connectors

    Roof Opening Panel Module

  
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-1		Ground

  
  Click to display connectors

    Overhead Console

  
  

  Positive Lead	Measurement / Action	Negative Lead
  C930-1		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-8		C930-19
  C921A-2		C930-18
  C921A-4		C930-20

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-8		C921A-2
  C921A-8		C921A-4
  C921A-8		C921A-6
  C921A-8		C921A-7
  C921A-8		C921A-1
  C921A-2		C921A-4
  C921A-2		C921A-6
  C921A-2		C921A-7
  C921A-2		C921A-1
  C921A-4		C921A-6
  C921A-4		C921A-7
  C921A-4		C921A-1

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-10		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921A-10		C921B-10
  C921A-10		Ground

• Ignition OFF.

• Disconnect All sunroof system and related in-line connectors.

• Check for:
  • corrosion – install new connector or terminals and clean module pins
  • damaged or bent pins – install new terminals or pins
  • pushed-out pins – install new pins as necessary

• Connect all sunroof system and related in-line connectors and make sure they seat correctly.

• Operate the system and verify the concern is still present.

Normal Operation and Fault Conditions

The shield (sunshade) motor receives battery voltage at all times from BCM fuse F24 (30A), and receives ignition voltage (accessory delay) from BCM fuse F2 (10A). The roof opening panel motor and switch is grounded through circuit G300. When the shield (sunshade) open switch is pressed, a signal is sent to the shield (sunshade) motor on sunshade open circuit which causes the shield (sunshade) to open. When the shield (sunshade) close switch is pressed, a signal is sent to the shield (sunshade) motor on the sunshade close circuit which causes the shield (sunshade) to close.

If the K bus (communication) circuit between the sunroof motor and shield (sunshade) motor is open or shorted the sunroof motor will only fully close the sunroof one time, then not operate. Also, if the K bus circuit is open or shorted the shield (sunshade) motor will not operate but the roof opening panel close to the fully closed position 1 time.

If the shield is not open at least to the front of the rear glass (comport stop) and the shield should open to the comfort stop.

Possible Sources

• Fuse(s)
• Wiring, terminals or connectors
• Roof opening panel shield (sunshade) motor/module assembly
• Roof opening panel switch

• Ignition ON.

• Press and hold shield (sunshade) open switch until the shield (sunshade) is fully opened.

• Press and hold shield (sunshade) close switch until the shield (sunshade) is fully closed.

• Press and release shield (sunshade) close switch to the second detent (one-touch open). The shield (sunshade) should open to the front of the fixed glass panel.

• Ignition OFF.

• Disconnect Shield motor C921B .

• Disconnect Roof opening panel control switch C930 .

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921B-2		Ground
  C921B-4		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921B-2		Ground
  C921B-4		Ground

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921B-2		C930-22
  C921B-4		C930-23

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921B-2		C921B-4
  C921B-2		C921B-3
  C921B-2		C921B-1
  C921B-2		C921B-6
  C921B-2		C921B-10
  C921B-4		C921B-1
  C921B-4		C921B-3
  C921B-4		C921B-6
  C921B-4		C921B-10

• Ignition OFF.

• Disconnect All sunroof system and related in-line connectors.

• Check for:
  • corrosion – install new connector or terminals and clean module pins
  • damaged or bent pins – install new terminals or pins
  • pushed-out pins – install new pins as necessary

• Connect all sunroof system and related in-line connectors and make sure they seat correctly.

• Operate the system and verify the concern is still present.

Normal Operation and Fault Conditions

All of the roof opening panel switches are single position switches that can achieve one touch operation in either direction by pressing the switch for less than 1 second. For manual operation, simply press and hold the switch until the roof opening panel or shield is in the desired position and release the switch. When the front roof opening panel is in the fully closed or between fully closed and full vent position the vent switch operates in either manual or one touch operation similar to the roof opening panel and shield switches. If the shield is not open at lease to the front of the rear fixed glass (comfort stop) when the vent or roof opening panel glass open switch is pressed then the shield will first open to the comfort stop position before the roof opening panel glass will move. The roof opening panel glass and the shield will not move at the same time. One touch operation of either the roof opening panel or the shield can be cancelled anytime by pressing any roof opening panel switches during operation. When the sunroof is open and the sunroof close switch is pressed to for one touch operation, a signal is sent to the sunroof motor through on the sunroof close circuit causing the sunroof to perform a one-touch close operation. The sunroof open one touch operation is the same as sunroof close, except if the shield (sunshade) is closed when the sunroof motor is commanded to perform a one-touch open operation the motors will communicate and the shield (sunshade) motor will perform a one-touch open operation, then the sunroof motor will perform the one-touch open operation requested. The shield one touch operation is the same as the sunroof except if the sunroof is open, the shield will only move to the comfort stop position. The sunroof will not open as a result of a shield one touch close operation. For more information on the operation. REFER to: Roof Opening Panel - System Operation and Component Description (501-17 Roof Opening Panel, Description and Operation).

Possible Sources

• Roof opening panel initialization (sunroof motor or shield (sunshade) motor)
• Roof opening panel motor/module assembly
• Shield (sunshade) motor
• Roof opening panel control switch

• Carry out the roof opening panel motor initialization procedure for the sunroof and shield (sunshade).
  REFER to: Power Roof Opening Panel Initialization (501-17 Roof Opening Panel, General Procedures).
  

• Operate the system using one-touch.

• Ignition OFF.

• Disconnect All sunroof system and related in-line connectors.

• Check for:
  • corrosion – install new connector or terminals and clean module pins
  • damaged or bent pins – install new terminals or pins
  • pushed-out pins – install new pins as necessary

• Connect all sunroof system and related in-line connectors and make sure they seat correctly.

• Operate the system and verify the concern is still present.