Lincoln Corsair: Roof Opening Panel / Diagnosis and Testing - Roof Opening Panel

• GO to Pinpoint Test C

• GO to Pinpoint Test F

• GO to Pinpoint Test H

• GO to Pinpoint Test A

• GO to Pinpoint Test B

• GO to Pinpoint Test D

• GO to Pinpoint Test E

• GO to Pinpoint Test G

Normal Operation and Fault Conditions

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.

The roof opening panel motor must be initialized when repairs are carried out on any part of the roof opening panel system or when the roof opening panel motor, glass, assembly, or air deflector has been removed or replaced for any reason. REFER to: Power Roof Opening Panel Initialization (501-17 Roof Opening Panel, General Procedures).

DTC Fault Trigger Conditions

Possible Sources

• Wiring, terminals or connectors
• Roof opening panel motor/module assembly
• Roof opening panel jumper harness
• BCM

• Ignition OFF.

• Disconnect Roof Opening Panel Module C921 .

• Disconnect BCM C2280F .

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-9		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-9		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-9		C2280F-60

• Check the roof opening panel jumper harness between vehicle harness C921 and the shield connector and motor connectors for opens or shorted circuits.

• Ignition OFF.

• Disconnect all roof opening panel system connectors, BCM C2280F and all 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 roof opening panel system connectors, BCM C2280F and all 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

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

The roof opening panel motor must be initialized when repairs are carried out on any part of the roof opening panel system or when the roof opening panel motor, glass, assembly, or air deflector has been removed or replaced for any reason. REFER to: Power Roof Opening Panel Initialization (501-17 Roof Opening Panel, General Procedures).

Possible Sources

• Front trim seal
• Primary seal
• Acoustic seal
• Air deflector

Visual Inspection and Pre-checks

• Roof opening panel seals

NOTE: It is normal to have some amount of wind noise when the roof opening panel is in the OPEN position. To determine if the wind noise is excessive, road test the vehicle at approximately 100 km/h (62 mph) with the roof opening panel closed, a single rear door window open and all remaining door windows closed while observing the level of wind noise. If the level of wind noise observed with the roof opening panel open (with all door windows closed) is greater than the wind noise observed with a single rear door window open, the wind noise is excessive.

• Road test the vehicle with the roof opening panel in the CLOSED, VENT and OPEN positions.

NOTE: When the roof opening panel sliding glass is in the VENT position, make sure that the leading edge of the glass is in contact with the sliding glass primary seal.

• Check the roof opening panel front trim seal, primary seal and acoustic seal to make sure they are fitted properly and not damaged

• Check the air deflector for damage and correct attachment.

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 primary seal 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 seal is unable to seal the glass efficiently.

Possible Sources

• Roof opening panel initialization
• Windshield seal
• Roof opening panel fixed glass urethane seal
• Roof opening panel primary seal
• Main track assembly
• Idler track assembly
• Roof opening panel frame urethane seal

Visual Inspection and Pre-checks

• Roof opening panel seals

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

• Lower the headliner.
  REFER to: Headliner - Lowering (501-05 Interior Trim and Ornamentation, Removal and Installation).
  

• Check the roof opening panel and windshield for leaks.

• Check the front and rear areas of the roof opening panel for leaks.

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

• Check the roof opening panel frame urethane seal for damage or openings.

• Check the roof opening panel main track and idler track assemblies for damage.

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

• Roof opening panel lifter arm
• Main track assembly
• Idler track assembly
• Loose fasteners

• Check the roof opening panel glass during operation.

• Open the roof opening panel glass.

• Check the main and idler track assemblies and rear lifter arms for obstructions, looseness or signs of damage.

• Check the shield for correct installation.

• Make sure the roof opening panel frame, drive block assembly 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

• Roof opening panel obstructions
• Roof opening panel lifter assemblies
• Roof opening panel shield
• Roof opening panel motor

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

• Check the roof opening panel sliding glass during operation.

• Open the roof opening panel glass.

• Check the main and idler track assemblies and rear lifter arms for obstructions, looseness or signs of damage.

• Check the roof opening panel shield for correct movement.

• Gain access to the roof opening panel glass and shield motors.

• Open the roof opening panel and shield.

Normal Operation and Fault Conditions

The roof opening panel motor receives battery voltage at all times from BCM fuse F37 (30A), and receives ignition voltage (accessory delay) from BCM fuse F6 (10A). The roof opening panel motor and switch are grounded at G303. When the roof opening panel switch is pressed, a ground signal is sent to the roof opening panel motor on the sunroof open circuit. When the roof opening panel switch is pulled, 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 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
• Roof opening panel jumper harness

Visual Inspection and Pre-checks

• BCM fuse F6 (10A)
• BCM fuse F37 (30A)

• Ignition ON.

• Attempt to operate the power windows.

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

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

• Check the roof opening panel glass operation.
  • Press and release the glass switch. The glass should open fully open in the one-touch open mode. If not, press and hold the glass open switch to fully open the glass.
  • Pull and release the glass switch. The glass should close to approximately 8 in. (200mm) from the closed position. Then pull 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 Roof Opening Panel Module C921 .

• Disconnect Roof Opening Panel Control Switch C930 .

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-1		Ground
  C921-2		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-1		Ground
  C921-2		Ground

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-1		C930-5
  C921-2		C930-4

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-1		C921-2

• Ignition OFF.

• Disconnect Roof Opening Panel Control Switch C930 .

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C930-6		Ground

• Disconnect Roof Opening Panel Module C921 .

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-21		Ground

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-14		Ground
  C921-16		Ground

• Check the roof opening panel jumper harness between vehicle harness C921 and the shield connector and motor connectors for opens or shorted circuits.

• 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 motor receives battery voltage at all times from BCM fuse F37 (30A), and receives ignition voltage (accessory delay) from BCM fuse F6 (10A). The roof opening panel motor and switch is grounded through circuit G200. When the shield open switch is pressed, a signal is sent to the shield motor on sunshade open circuit which causes the shield to open. When the shield close switch is pressed, a signal is sent to the shield motor on the sunshade close circuit which causes the shield to close.

If the K bus (communication) circuit between the sunroof motor and shield 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 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), the glass will not open.

Possible Sources

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

• Ignition OFF.

• Disconnect Roof Opening Panel Module C921 .

• Disconnect Roof Opening Panel Control Switch C930 .

• Ignition ON.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-4		Ground
  C921-5		Ground

• Ignition OFF.

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-4		Ground
  C921-5		Ground

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-4		C930-13
  C921-5		C930-11

• Measure:
  Click to display connectors
  

  Positive Lead	Measurement / Action	Negative Lead
  C921-4		C921-5

• Check the roof opening panel jumper harness between vehicle harness C921 and the shield connector and motor connectors for opens or shorted circuits.

• 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 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 (closes to approximately 8 in. (200mm) from the closed position only). The sunroof open one touch operation is the same as sunroof close, except if the shield is closed when the sunroof motor is commanded to perform a one-touch open operation the motors will communicate and the shield 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 motor)
• Roof opening panel motor/module assembly
• Shield motor
• Roof opening panel control switch

• Carry out the roof opening panel motor initialization procedure for the sunroof and shield.
  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.