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Contents Wiring diagrams Section: Sun Roof/t-Top/convertible Top All sections

Power Sun Roof Buick LeSabre VIII

Sun Roof/t-Top/convertible Top 22 illustrations ~4771 words

FASTENER TIGHTENING SPECIFICATIONS

ApplicationSpecification
MetricEnglish
Sunroof Actuator Motor Bolts5 N.m44 lb in
Sunroof Module Assembly to Roof Bolts9 N.m80 lb in
Sunroof Window Screws5 N.m44 lb in

Fastener Tightening Specifications

Scheme 1

Scheme 1: POWER SUNROOF SCHEMATICS
Scheme 1: POWER SUNROOF SCHEMATICS

Scheme 2

Scheme 2: POWER ROOF SYSTEMS COMPONENT VIEWS
Scheme 2: POWER ROOF SYSTEMS COMPONENT VIEWS

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4: POWER ROOF SYSTEMS CONNECTOR END VIEWS
Scheme 4: POWER ROOF SYSTEMS CONNECTOR END VIEWS

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9: POWER SUNROOF DISASSEMBLED VIEW
Scheme 9: POWER SUNROOF DISASSEMBLED VIEW

DIAGNOSTIC STARTING POINT - ROOF

Begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK - POWER SUNROOF The Diagnostic System Check will provide the following information

  1. The identification of the control modules which command the system.
  2. The ability of the control modules to communicate through the serial data circuit.
  3. The identification of any stored Diagnostic Trouble Codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Symptoms

When no DTCs are present, begin symptom diagnosis by reviewing the POWER SUNROOF DESCRIPTION & OPERATION . Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to the SYMPTOMS - ROOF in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2 Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
  2. 4 The symptoms list in Symptoms will determine the correct diagnostic procedure to use.
  3. 6 The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Scheme 10

Scheme 10
Scheme 10

SYMPTOMS - ROOF

Note. The following must be completed before using the symptom tables.

  1. Perform «DIAGNOSTIC SYSTEM CHECK - POWER SUNROOF»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to «POWER SUNROOF DESCRIPTION & OPERATION»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the Power Sunroof system. Refer to «CHECKING AFTERMARKET ACCESSORIES»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof__checking-aftermarket-accessories) .
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT & POOR CONNECTIONS .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. «POWER SUNROOF INOPERATIVE»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof)
  2. «POWER SUNROOF DOES NOT OPEN TO EXPRESS POSITION»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof)
  3. «POWER SUNROOF DOES NOT CLOSE»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof)
  4. «RETAINED ACCESSORY POWER (RAP) ON AFTER TIME-OUT»(/buick/lesabre/viii-2000-2005/remont/accessories-control-systems/#retained-accessory-power-system) in Retained Accessory Power, if the power sunroof should operate for more than 10 minutes after the ignition has been turned OFF.

CHECKING AFTERMARKET ACCESSORIES

Do not connect aftermarket accessories into the following circuits

  1. SIR circuits, all such circuits are indicated on circuit diagrams with the SIR symbol.
  2. OBD II circuits, all such circuits are indicated on circuit diagrams with the OBD II symbol.

Always check for aftermarket accessories (non-OEM) as the first step in diagnosing electrical problems. If the vehicle is so equipped, disconnect the system to verify that these add-on accessories are not the cause of the problems.

Possible causes of vehicle problems related to aftermarket accessories include

  1. Power feeds connected to points other than the battery.
  2. Antenna location.
  3. Transceiver wiring located too close to vehicle electronic modules or wiring.
  4. Poor shielding or poor connectors on antenna feed line.
  5. Check for recent service bulletins detailing installation guidelines for aftermarket accessories.

Scheme 11

Scheme 11: POWER SUNROOF INOPERATIVE
Scheme 11: POWER SUNROOF INOPERATIVE

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

The numbers below refer to the step numbers on the diagnostic table.

  1. 2 If the express open feature does operate properly, then suspect the express open signal circuit for a poor connection or intermittent.

Scheme 15

Scheme 15
Scheme 15

The numbers below refer to the step numbers on the diagnostic table.

  1. 2 If the system does close properly, then suspect either the sunroof limit switch soft stop signal circuit or the sunroof limit switch low reference circuit for a poor connection or intermittent.

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

SUNROOF GLASS HEIGHT & OPENING FIT ADJUSTMENT

  1. Cycle the sunroof window from the full open to closed position.
  2. Loosen the 4 adjusting screws (1).
  3. There are 2 adjusting screws on each side of the sunroof window
  4. Center the window front to rear in the opening. CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  5. Adjust the front of the sunroof window (2) from flush to 1 mm (0.04 in) (1) below the top surface of the roof panel (3). Tighten the front sunroof window adjustment screws to 5 N.m (44 in lbs).
  6. Adjust the rear of the sunroof window (2) from flush to 1 mm (0.04 in) (1) above the top surface of the roof panel (3). Tighten the rear sunroof window adjustment screws to 5 N.m (44 in lbs).
  7. Cycle the sunroof window through all of the positions.
  8. Verify the sunroof window fore/aft adjustments.
  9. Verify the front and rear height adjustment.
  10. Readjust the sunroof window, if necessary.

SUNROOF MOTOR SYNCHRONIZATION

Note. The sunroof actuator motor is timed at the factory. If there is battery voltage applied to a new sunroof actuator motor, the pre-timed settings within the sunroof actuator are lost and cannot be reset to accommodate proper installation.

There should be no battery voltage applied to a new sunroof actuator motor until the following conditions are satisfied

  1. The sunroof window is in full closed position. Refer to «SUNROOF TRACK TIMING/SYNCHRONIZATION»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof__sunroof-track-timingsynchronization) .
  2. The sunroof actuator motor is installed to the sunroof module assembly. Install the sunroof actuator motor. Refer to «POWER SUNROOF MOTOR REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .

SUNROOF TRACK TIMING/SYNCHRONIZATION

Note. If the sunroof actuator motor is the only part being serviced, follow the power sunroof actuator replacement procedure for the sunroof actuator to sunroof window timing. Refer to POWER SUNROOF MOTOR REPLACEMENT .

A new replacement power sunroof actuator is set to the fully closed and flush position at the factory.

  1. Remove the sunroof window. Refer to «SUNROOF WINDOW REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  2. Fabricate a gage (2) 46.8 mm (1.84 in) wide (A). A piece of thick paper will work.
  3. Set the gage into the track near the rear of the opening between the move driver slide (1) and the bracket.
  4. Move the driver slide fore or aft in order to get the proper setting.
  5. Repeat steps 3 and 4 for the other side.
  6. Install the sunroof window. Refer to «SUNROOF WINDOW REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  7. Install the sunroof actuator. Refer to «POWER SUNROOF MOTOR REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  8. Operate the sunroof through all functions to ensure proper operation.

Removal Procedure

  1. Lower the headliner in order to access the drain hose connections. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  2. Cut the tie wraps from the front drain hoses.
  3. Disconnect the front drain hoses from the sunroof module spouts.
  4. Remove the tape from the drain hoses.
  5. Remove the front wheelhouse liner. Refer to «WHEELHOUSE LINER REPLACEMENT - FRONT»(/buick/lesabre/viii-2000-2005/remont/exterior-body-panels/#body-front-end) in Body Front End.
  6. Remove the front drain hose from the wheelhouse of the vehicle.

Scheme 18

Scheme 18
Scheme 18

Installation Procedure

  1. Install the drain hoses up through the wheelhouse to the sunroof module drain spouts.
  2. Tape the front drain hoses into position.
  3. Install the front wheelhouse liner. Refer to «WHEELHOUSE LINER REPLACEMENT - FRONT»(/buick/lesabre/viii-2000-2005/remont/exterior-body-panels/#body-front-end) in Body Front End.
  4. Connect the drain hoses to the drain spouts on the sunroof module. NOTE: When installing the new drain hose tie wraps, position the tie wraps in order to maintain clearance between the tie wraps and the headliner.
  5. Secure the drain hoses to the sunroof module with new tie wraps.
  6. Install the headliner to the roof. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  1. Lower the headliner in order to access the drain hose connections. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  2. Cut the tie wraps from the drain hoses.
  3. Disconnect the drain hoses from the sunroof module.
  4. Remove the interior moldings in order to access the drain hose retaining clips. Refer to «TRIM PANEL REPLACEMENT - REAR QUARTER UPPER»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim__trim-panel-replacement-rear-quarter) in Interior Trim.
  5. Remove the upper portion of the rear drain hoses from the retaining clips.
  6. Remove the rear compartment side trim panels. Refer to «COMPARTMENT TRIM PANEL REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
  7. Remove the lower portion of the rear drain hoses from the retaining clips.
  8. Remove the rear drain hose (1) from the vehicle.
  1. Route the rear drain hoses (1) down through the access hole in the side rail. see scheme 24
  2. Push the end of the rear drain hoses down to the rear compartment opening.
  3. Clip the lower portion of the rear drain hoses into position.
  4. Install the rear compartment side trim panels. Refer to «COMPARTMENT TRIM PANEL REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
  5. Clip the upper portion of the rear drain hoses into position. see scheme 23
  6. Install the drain hoses to the drain spouts on the sunroof module. NOTE: When installing the new drain hose tie wraps, position the tie wraps in order to maintain clearance between the tie wraps and the headliner.
  7. Secure the drain hoses to the sunroof module with new tie wraps.
  8. Install the headliner to the roof, Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

SUNROOF DRAIN CHANNEL INSPECTION & CLEANING

A drain trough encircles the sliding panel and leads to the drain hoses. The drain hoses are located at each corner of the housing. The two front drain hoses route down the windshield pillars. The two rear drain hoses route down the rear sail and the quarter panels.

If you encounter a wet headliner or other water leak, inspect the following areas for the source of the leak

  1. The windshield.
  2. The rear window.

Verify that the drainage system is not plugged or restricted. Use the following procedure

  1. Using a one pint container, pour water into the drain trough with the sunroof open.
  2. Inspect for water drainage through holes.
  3. If the water flow is restricted, use compressed air in order to clear the drain system. Do not blow the drain hose away from the housing drain spout.
  4. Retest the system.

If water drips from the headliner above the door, lower the headliner as required in order to inspect for a proper drain tube connection. If necessary, reclamp the tubes onto the housing drain spout.

  1. Remove the sunroof window.
  2. Slide the sunshade (4) forward to the closed position.
  3. Push the spring retainer clips (1) inward in order to disengage the clips from the track (3) using an upwards lifting motion.
  4. Remove the sunshade (2) from the sunroof module.

Scheme 19

Scheme 19
Scheme 19
  1. Engage the sunshade (2) by positioning the spring clips (1) into the track (3).
  2. Push the spring retainer clips (1) inward on the opposite side of the sunshade (2) to engage them into the track.
  3. Slide the sunshade back and forth to ensure proper operation.
  4. Slide the sunshade to the half closed position.
  5. Install the sunroof window.
  1. Cycle the sunroof window to the rear.
  2. Push down on the right front side of the air deflector.
  3. While holding the right side down, complete the following steps: Push the left front side of the air deflector towards the right side. Pull up on the left side until the lower tab (1) clears the roof opening (2).
  4. Swing the air deflector (1) in a vertical position, slide rearward, in order to disengage the air deflector from the hooks (2).
  5. Remove the air deflector (1) from the sunroof module.
  1. Engage the rear of the air deflector (1) into the side hooks (2) on the sunroof module (3). see scheme 28
  2. Position the air deflector forward.
  3. Push the right side of the air deflector down into the roof opening.
  4. While holding the right side down; complete the following steps: Push the left front side of the air deflector towards the right side. Pull up on the left side until the lower tab (1) clears the roof opening fit. see scheme 27
  5. Push the left front side of the air deflector inwards and down so the tab clears the roof opening. see scheme 26
  6. Close the sunroof window.
  1. Open the sunshade.
  2. Remove the sunroof window screws (1) on both sides. NOTE: If operating the sunroof without the window refer to «SUNROOF AIR DEFLECTOR REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  3. Remove the sunroof window, being careful not to scratch the roof surface.

Scheme 20

Scheme 20
Scheme 20
  1. Position the sunroof window (3) into the opening.
  2. Install the sunroof window screws (1). Do not tighten the screws.
  3. Adjust the sunroof window. Refer to «SUNROOF GLASS HEIGHT & OPENING FIT ADJUSTMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof__sunroof-glass-height-opening-fit) .
  1. Remove the overhead console. Refer to «CONSOLE REPLACEMENT - OVERHEAD»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim__console-replacement-overhead) in Interior Trim.
  2. Disconnect the electrical connector (1).
  3. Remove the switch retaining screws (2) on the backside of the overhead console.
  4. Remove the power sunroof switch from the overhead console.
  1. Install the power sunroof switch into the overhead console.
  2. Install the switch retaining screws (2). see scheme 31
  3. Connect the electrical connector (1).
  4. Install the overhead console. Refer to «CONSOLE REPLACEMENT - OVERHEAD»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim__console-replacement-overhead) in Interior Trim.

Note. Do not apply battery voltage to a new sunroof actuator motor prior to installing the actuator motor to the sunroof module assembly. The sunroof window must be in the full closed position.

  1. If possible, close the sunroof window before removing the sunroof actuator motor.
  2. Lower the formed headliner at the rear in order to access the sunroof actuator motor. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  3. Disconnect the electrical connectors (3) from the sunroof actuator motor (1).
  4. Remove the bolts (5) securing the sunroof actuator motor (1) to the sunroof module assembly (2).
  5. Remove the sunroof actuator motor from the sunroof module assembly.
  1. Manually move the sunroof window to the full closed position.
  2. Install the sunroof actuator motor (1) to the sunroof module assembly (2). see scheme 32 CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  3. Install the bolts in order to secure the sunroof actuator motor to the sunroof module. Tighten the bolts to 5 N.m (44 in lbs).
  4. Connect the electrical connectors (3) to the sunroof actuator motor (1). NOTE: Verify the sunroof operation before installing the headliner.
  5. Check the window fit to the roof opening. Refer to «SUNROOF GLASS HEIGHT & OPENING FIT ADJUSTMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof__sunroof-glass-height-opening-fit).
  6. Install the headliner. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Scheme 21

Scheme 21: Removal Procedure
Scheme 21: Removal Procedure
  1. Remove the passenger side rear assist handle. Refer to «ASSIST HANDLE & REAR COAT HOOK REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  2. Remove the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/seats/#power-seat-system) in Seats.
  3. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/seats/#power-seat-system) in Seats.
  4. Remove the passenger side rear sail panel. Refer to «TRIM PANEL REPLACEMENT - REAR QUARTER UPPER»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim__trim-panel-replacement-rear-quarter) in Interior Trim. NOTE: Release the passenger side center pillar trim garnish molding upper retainer.
  5. Carefully pull the upper center trim panel inward in order to allow clearance for the headliner.
  6. Carefully pull the passenger side of the headliner downward in order to release the center and rearward headliner roof magnets.
  7. Reach inward between the headliner and roof panel in order to release the sunroof express module clip (3) securing the express module (1) to the sunroof module (2).
  8. With the clip (3) depressed, slide the express module toward the sunroof actuator motor.
  9. Disconnect the electrical connectors.
  10. Remove the sunroof express module from the vehicle.
  1. Connect the electrical connectors to the sunroof express module. see scheme 39
  2. Install the sunroof express module tabs (2) into the sunroof module slots (3) located on the sunroof module.
  3. Slide the sunroof express module (1) away from the sunroof motor until the sunroof express module is fully engaged to the sunroof module. NOTE: Test the proper operation of the sunroof functions before installing the interior trim components.
  4. Reposition the headliner to the center and rearward roof magnets.
  5. Install the passenger side sail panel. Refer to «TRIM PANEL REPLACEMENT - REAR QUARTER UPPER»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim__trim-panel-replacement-rear-quarter) in Interior Trim.
  6. Install the rear seat back. see scheme 35 Refer to «SEAT BACK REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/seats/#power-seat-system) in Seats.
  7. Install the rear seat cushion. see scheme 34 Refer «SEAT CUSHION REPLACEMENT - REAR»(/buick/lesabre/viii-2000-2005/remont/seats/#power-seat-system) to in Seats.
  8. Align the upper center trim panel retainer, push inward in order to secure. see scheme 37
  9. Reposition the passenger rear door opening weatherstrip.
  10. Install the passenger side rear assist handle (1). Refer to «ASSIST HANDLE & REAR COAT HOOK REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  11. Close the passenger rear door.

SUNROOF MODULE REPLACEMENT

Note. Tools Required: Sunroof Alignment Pins (J 44363).

  1. If replacing the sunroof module with a new replacement module, remove the sunroof window. Refer to «SUNROOF WINDOW REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  2. Remove the sunshade panel. Refer to «SUNSHADE PANEL REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  3. If reinstalling the original sunroof, cycle the sunroof window to the rear.
  4. Remove the headliner. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  5. Disconnect the electrical harness.
  6. Cut the tie wraps from the drain hoses.
  7. Disconnect the drain hoses from the sunroof module.
  8. Remove the sunroof module to roof bolts (1).
  9. When lowering the sunroof module, ensure the coaxial cable to the antenna module does not interfere with the sunroof module.
  10. Remove the sunroof module from the vehicle.
  1. Position the sunroof module into the roof opening.
  2. Ensure not to pinch the coaxial cable to the antenna module located at the left rear side of the inner roof panel.
  3. Hand start the 2 center sunroof module bolts (1) into the roof in order to hold the sunroof module into position. see scheme 44 CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Use the J 44363 in order to align the sunroof to the sunroof opening. Install and hold the alignment pins through the sunroof module holes (2) into the roof alignment holes. Tighten all of the sunroof module bolts (1) to 9 N.m (80 in lbs).
  5. Remove the alignment pins.
  6. Install the drain hoses to the drain spouts on the sunroof module. NOTE: When installing the new drain hose tie wraps, position the tie wraps to maintain clearance between the tie wraps and the headliner.
  7. Secure the drain hoses to the sunroof module with new tie wraps.
  8. Connect the electrical harness to the sunroof module.
  9. Install the sunshade. Refer to «SUNSHADE PANEL REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof).
  10. Install the sunroof window and loosely install the screws. Refer to «SUNROOF WINDOW REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof).
  11. Adjust the sunroof window. Refer to «SUNROOF GLASS HEIGHT & OPENING FIT ADJUSTMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof__sunroof-glass-height-opening-fit). NOTE: Verify the proper operation of the sunroof before installing the headliner.
  12. Install the headliner. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  1. Remove the headliner. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  2. Remove the sunroof control module. Refer to «POWER SUNROOF EXPRESS MODULE REPLACEMENT»(/buick/lesabre/viii-2000-2005/remont/sun-rooft-topconvertible-top/#power-sun-roof) .
  3. Remove the tape (5) securing the electrical harness to the sunroof actuator motor (4).
  4. Disconnect the electrical connectors (1,3) at the sunroof actuator motor.
  5. Cut the tie straps securing the electrical harness to the drive cable tube. CAUTION: Note the correct routing of the electrical wiring. Failure to reinstall the wiring properly could result in damage to the wiring.
  6. Disconnect the electrical harness from the rear sunroof drain hose retainers.
  7. Disconnect the electrical connector at the main body electrical harness at the rear edge of the rear shelf panel.
  8. Remove the electrical harness from the vehicle.
  1. Connect the electrical connector to the main body electrical harness at the rear shelf panel.
  2. Secure the electrical harness to the clips on the rear drain hose.
  3. Connect the electrical connectors (1,3) to the sunroof actuator motor (4). see scheme 47
  4. Secure the harness to the sunroof actuator motor with new electrical tape (5).
  5. Connect the electrical connectors to the sunroof control module.
  6. Install the control module to the sunroof module assembly. see scheme 46
  7. Ensure the locking tabs are secure.
  8. Secure the electrical harness to the drive cable tube with 2 new tie straps.
  9. Verify the operation of the sunroof.
  10. Install the headliner. Refer to «HEADLINER REPLACEMENT (WITHOUT SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) or «HEADLINER REPLACEMENT (WITH SUNROOF)»(/buick/lesabre/viii-2000-2005/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Power Sunroof System Components

The power sunroof system consists of the following components

  1. Sunroof module.
  2. Sunroof motor with limit switch.
  3. Sunroof switch.
  4. Sunroof glass, tilt/slide type, with glass sliding between roof and headliner.
  5. Sunshade.
  6. Rail and track assembly upon which the sunroof glass rides.
  7. Sunroof system fuse: RAP 20 A fuse.
  8. Ground G401.

Power Sunroof Operation

The power sunroof will operate with the ignition switch turned to Accessory or RUN. 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 & OPERATION in Retained Accessory Power.

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

  1. Express open.
  2. Slide fully open.
  3. Vent fully open.
  4. Partially open in either slide or vent mode.
  5. Fully closed (flush with the vehicle roof).

Express Open

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 sunroof switch to the second rearward position once. 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 references) inputs, pulling the 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 drive the motor in the open direction, slightly lowering the rear edge of the sunroof glass, then sliding open with the sunshade, allowing the wind deflector to raise upward.

The sunroof glass will continue to express open until

  1. The sunroof glass reaches a predetermined (nearly full open) comfort stop position controlled by the limit switch.
  2. Activation of the sunroof switch (in any direction) to stop the sunroof glass in a desired position other than the express open (comfort stop) position.
  3. Motor stall is sensed because the sunroof glass is being obstructed.
  4. The operation time-out expires, 15 seconds after the initiation of the express open feature has been requested.

To 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 sunroof switch to the first rearward 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 drive the motor in the open direction, slightly lowering the rear edge of the sunroof glass, then sliding open with the sunshade, allowing the wind deflector to raise upward. The sunroof glass will continue to open until the sunroof motion is terminated by either

  1. Motor stall is sensed because the sunroof has reached its limit of travel or due to an obstruction.
  2. The sunroof may be left in any position between fully open and fully closed.
  3. The operation time-out expires, 15 seconds after the initiation of the express open feature had been commanded.

To Vent Open

Opening the sunroof glass, to the vent position, can be done when it is between fully closed and full vent. Press and hold the sunroof switch upward. This will apply the sunroof switch low reference circuit to the sunroof switch open vent signal circuit. Holding the sunroof switch in the vent position will cause the sunroof switch open vent signal circuit (12 volt reference) input to be pulled 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 drive the motor in the closed direction (to vent position) until the sunroof motion is terminated by either

  1. Motor stall is sensed because the sunroof has reached its limit of travel.
  2. Releasing the sunroof switch.

Closing To Fully Closed Position

To close the power sunroof from the following positions

  1. Open position, push and hold the sunroof switch forward.
  2. Vent position, pull and hold downward the 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. Holding the sunroof switch to the closed position will cause the sunroof switch open signal and sunroof switch open vent signal circuits (12 volt references) to be pulled 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 drive the motor to the closed position until the limit switch closes, indicating a flush close position. As the sunroof glass nears the closed position, the wind deflector will retract, and 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.

Sunroof Motor

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

  1. Voltage is supplied to the sunroof motor open control circuit.
  2. Ground is maintained to the sunroof motor close control circuit.

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

  1. Voltage is supplied to the sunroof motor close control circuit.
  2. Ground is maintained to the sunroof motor open control circuit.

Limit Switch

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 voltage will be removed from the motor control circuits.

Scheme 22

Scheme 22: SPECIAL TOOLS & EQUIPMENT
Scheme 22: SPECIAL TOOLS & EQUIPMENT