Sunroof System Chevrolet Impala IX

Fastener Tightening Specifications

Scheme 1

Symptoms - Roof

Note. Complete the following procedures before using the symptom tables.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) in order to verify that all of the following conditions are true: No DTCs are set. The control modules can communicate via the serial data link.
2. Review the system description and operation in order to learn the system functions. Refer to «Sunroof Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the power sunroof system. Refer to «Checking Aftermarket Accessories»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the accessible system components for obvious damage or for conditions which can cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

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

1. «Power Sunroof Malfunction»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
2. «Retained Accessory Power Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/body-electrical/#wiring-systems-and-power-management-description-and-operation) , if the power sunroof should operate longer than the retained accessory power (RAP) time-out.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

Ignition voltage is supplied to the sunroof control module by the RAP fuse. B+ is applied to the sunroof motor via the S/ROOF fuse. The sunroof control module supplies each of the sunroof switch signal circuits with a 12-volt reference. When a switch is pressed the signal circuit is pulled low signaling the sunroof open or close request. The sunroof control module determines the motor direction based on inputs received from the sunroof switch. When the motor reverses the polarity of the applied voltage, the motor reverses direction.

Reference Information

Schematic Reference

Sunroof Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Sunroof Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Circuit/System Verification

1. With the sunroof in the closed position, press the sunroof open switch. The sunroof should open.
2. With the sunroof in the open position, press the sunroof close switch. The sunroof should close.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the sunroof control module.
2. Test for less than 5.0 ohm between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, replace the sunroof control module.
4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 3 and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance. If the circuit tests normal, refer to «Retained Accessory Power Malfunction»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) .
5. Ignition OFF, connect the harness connector at the sunroof control module.
6. Disconnect the harness connector at the sunroof switch.
7. Test for less than 5.0 ohm between the low reference circuit terminal C and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the sunroof control module.
8. Ignition ON, momentarily install a 10-amp fused jumper wire between the signal circuit terminal D and ground. The sunroof should move. If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
9. Momentarily install a 10-amp fused jumper wire between the signal circuit terminal E and ground. The sunroof should move. If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
10. If all circuits test normal, test or replace the sunroof switch.

Component Testing

1. With the ignition OFF, disconnect the harness connector at the sunroof switch.
2. Test for infinite resistance between the switch terminals listed below and the low reference terminal C with the switch in the neutral position. Roof open terminal D Roof close terminal E If not the specified value, replace the sunroof switch.
3. Test for less than 5.0 ohm of resistance between the switch terminals listed below the low reference terminal C with the switch in the appropriate position. Roof open terminal D Roof close terminal E If greater than the specified range, replace the sunroof switch.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Sunroof Switch Replacement (Impala)»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for sunroof motor/actuator replacement, setup, and programming

Power Sunroof Does Not Close

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle or any time an existing sunroof motor actuator is removed from the vehicle. Refer to Sunroof Motor/Actuator Initialization/Teach Process .

Power Sunroof Window is Skewed

Parallel positioning of the window track guides or lift mechanism and cable is crucial to the proper function of the system. If the guides are misaligned, refer to Sunroof Track Timing/Synchronization (Impala) .

Power Sunroof When Operated from Vent to Close One Side Will Drop Before the Other

Parallel positioning of the window track guides or lift mechanism and cable is crucial to the proper function of the system. If the guides are misaligned, refer to Sunroof Track Timing/Synchronization (Impala) .

Power Sunroof When Closing from the Vent Position the Window Will Reverse Direction

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle or any time an existing sunroof motor actuator is removed from the vehicle. Refer to Sunroof Motor/Actuator Initialization/Teach Process .

Power Sunroof Will Stop at the Wrong Location

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle or any time an existing sunroof motor actuator is removed from the vehicle. Refer to Sunroof Motor/Actuator Initialization/Teach Process .

Power Sunroof Will Over Travel the Open Position and Stall the Motor

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle or any time an existing sunroof motor actuator is removed from the vehicle. Refer to Sunroof Motor/Actuator Initialization/Teach Process .

Power Sunroof Will Over Travel the Close Position and Stall the Motor

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle or any time an existing sunroof motor actuator is removed from the vehicle. Refer to Sunroof Motor/Actuator Initialization/Teach Process .

Removal Procedure

1. Remove the sunroof window. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
2. Power sunroof tracks to the fully rear position.
3. Remove the screw (1) from the actuator (2) located at the front of each window track.
4. Remove the screws (1) from the sunroof air deflector.
5. Remove the sunroof air deflector from the sunroof module (2). Slide the air deflector rearward until it releases from the module.

Installation Procedure

1. Install the guides to the air deflector.
2. Position the sunroof air deflector to the sunroof module.
3. Install the screws (1) attaching the sunroof air deflector to the sunroof module (2). Tighten: Tighten the screws to 3 N.m (26 lb in).
4. Install the screw (1) to the actuator (2) located at the front of each window track. Tighten: Tighten the screws to 2 N.m (18 lb in).
5. Power the sunroof window tracks to the close position.
6. Install sunroof window. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
7. Verify that the spring action of the sunroof air deflector is operating.
8. Close the sunroof window.

Drain Hose Routing

Note. If the headliner is wet DO NOT remove any interior trim. Do the Plugged Drain Hose test first.

A drain trough encircles the sunroof window panel and water is drained off by the drain hoses located at each corner of the housing. A drain channel spans across the sunroof module at the rear of the window panel and directs water into the trough.

1. The front drain hoses are routed down the windshield pillars and out the center of the pillar between the door hinges. The front hoses are installed in a rubber grommet and retained by clips.
2. The rear drain hoses are routed through the rear pillars and out of the rocker panel. In some vehicle the drain hoses are routed out through the metal roof slots and routed to the lower wheelhouse to drain out of the vehicle. The rear hoses are installed in a rubber grommet and retained by clips.

Plugged Drain Hose

If a waterleak has occurred check for a plugged drain hose at each corner of drainage system.

1. Open the sunroof window.
2. To test for blockage, pour a small container of water into the module housing drain trough. Check each corner to confirm the drain hose is draining water.
3. Use compressed air, 241 kPa (35 psi) or less to blow out any drain hose that is plugged.
4. Test the system again.
5. If the hose remains plugged, check to see it is properly routed and does not have a kink. Refer to «Sunroof Housing Front Drain Hose Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) or «Sunroof Housing Rear Drain Hose Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
6. Remove the blockage using the following steps. Push mechanics wire through the hose to remove the obstruction. Use compressed air in order to blow out any remaining material.

Disconnected Drain Hose

Inspect the drainage system for disconnected drain hoses. Complete the following steps in order to obtain partial access to drain hoses and check for a disconnected hose.

1. Open the sunroof window panel.
2. Lower the headliner as needed. Refer to «Headlining Trim Panel Replacement»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
3. Connect any disconnected hoses.
4. Ensure that the rear drain hoses are properly routed in the metal roof slot and taped in place.

1. The old sunroof window and sunshade will need to be installed to the new sunroof frame assembly. Remove the sunroof window. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
2. Remove the sunshade panel. Refer to «Sunroof Sunshade Replacement (CF5)»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
3. Remove the air deflector. Refer to «Sunroof Air Deflector Replacement (Impala)»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
4. Lower the headliner. Refer to «Headlining Trim Panel Replacement»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
5. Disconnect the electrical connector on the sunroof actuator.
6. Cut the tie straps securing the electrical harness to the sunroof cable rear drive tube.
7. Disconnect the drain hoses from the front sunroof frame drain spouts (1).
8. Disconnect the drain hoses from the rear sunroof frame drain spouts.
9. Remove the sunroof frame to the roof bolts (1).
10. Remove the 2 center, side to side, bolts last in order to help support the sunroof frame to the roof ring.
11. Remove the last 2 sunroof to roof ring bolts.
12. With the aid of an assistant, lower and remove the sunroof frame assembly out the passenger side door.

1. With the aid of an assistant, position the new sunroof frame assembly into the alignment pins (2) located on the roof ring.
2. Hand start the 2 center, side to side, sunroof frame assembly to roof bolts (1) in order to hold the sunroof frame into place.
3. Finger tighten the 2 center bolts.
4. Install the remaining sunroof frame to roof bolts and tighten the bolts to 9 N.m (80 lb in).
5. Connect the front and rear drain hoses to the drain spouts (1) on the sunroof frame.
6. Install sunroof motor/actuator to the frame.
7. Install the screws to the motor/actuator and tighten the bolts to 6 N.m (53 lb in).
8. Connect the electrical connector to the sunroof motor/actuator.
9. Secure the harness with suitable straps.
10. Install the air deflector. Refer to «Sunroof Air Deflector Replacement (Impala)»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
11. Install the sunshade. Refer to «Sunroof Sunshade Replacement (CF5)»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
12. Install the sunroof window and loosely install the screws. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
13. Adjust the sunroof window. Refer to «Sunroof Window Height and Opening Fit Adjustment»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-window-height-and-opening-fit) .
14. Verify the proper operation of the sunroof before securing the headliner.
15. Initialization/Teach the sunroof motor. Refer to «Sunroof Motor/Actuator Initialization/Teach Process»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-motoractuator-initializationteach-process) .
16. Raise and install the headliner, with the aid of an assistant. Refer to «Headlining Trim Panel Replacement»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .

Scheme 2

Scheme 3

1. Beginning at the joint, pull the sunroof opening trim lace from the headliner.
2. Remove the sunroof opening trim lace from the headliner.

1. Beginning at the joint, install the sunroof opening trim lace into place around the sunroof opening.
2. Ensure the sunroof trim lace is fully seated to the headliner.

Sunroof Motor/Actuator Initialization/Teach Process

Perform the Initialization/Teach Process any time a new sunroof motor actuator is installed in the vehicle.

1. Ensure that the electrical harness on the headliner is connected to the sunroof.
2. Press the sunroof switch to the close position until the window stops at the front hard stop in the fully closed position, then moves slightly back to the soft stop position. Release the switch. (This is the initialization portion).
3. Within 6 seconds, press and hold the close switch again. After 3 more seconds, the sunroof window will move toward the open position. (This is the teach portion).
4. Continue holding the switch until the sunroof window moves back to the close and stops at the closed position. Release the button. The initialization/Teach procedure is complete.
5. Verify the operation of the sunroof.

1. Perform the Reinitialization/Teach process any time the sunroof motor in removed form the sunroof.
2. Ensure that the electrical harness on the headliner is connected to the sunroof.
3. Press the sunroof switch to the close position until the window stops at the front soft stop in the fully closed position. Release the switch then press to the close position again and hold for 10 seconds or greater. The sunroof will then stall at the hard stop, and move back sightly to the soft stop position. Release the switch. (This is the re-initialization portion).
4. Within 6 seconds, press and hold the close switch again. After 3 more seconds, the sunroof window will move toward the open position. (This is the teach portion).
5. Continue holding the switch until the sunroof window moves back to the close and stops at the closed position. Release the button. The initialization/Teach procedure is complete.
6. Verify the operation of the sunroof.

Scheme 4

1. Remove the sunroof window panel from the sunroof module. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
2. Remove the sunroof sunshade (7) from the module.
3. Do the following from the right side and through the sunroof opening, outside the vehicle: Close the sunshade to with in an inch of the front opening. Carefully arch the rear center of the sunshade. Pull upward in the rear center of the sunshade (7). Release the tabs (5, 6) from under the water gutter. Lift upward in the rear center of the sunshade until the guide tabs (3) release from the track. Slightly rotate the sunshade clockwise at the same time push forward releasing (4, 2) and then (1).
4. Remove the sunshade from the tracks.

1. Install the sunshade front tab to the left corner of sunroof track.
2. Do the following from outside the vehicle and through the opening of the sunroof window from the right or left side. Install the guide tab (1) into left front corner. Rotor the sunshade until the guide tab (2) is insert into the right corner. Insert the sunshade guide tab (3) flex the sunshade panel as needed to seat. Arch the sunshade in the rear right corner (4) until guide tab can be installed. Carefully flex the rear of the sunshade under water drain channel to allow the sunshade guide tabs (5) and (6) to clear.
3. While seated inside the vehicle with the sunshade in the closed position, verify that the front of the sunroof is not bent upward. If the sunshade is bent, grab the front middle of the sunshade and carefully pull down to adjust the shade to fit the front center edge.
4. Install the sunroof window panel. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .

1. Remove the sunroof window. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
2. Remove the sunroof window seal from the sunroof window frame by pulling the sunroof window seal away at one point and continuing around the perimeter of the sunroof window frame.
3. Wipe the perimeter of the sunroof window frame area with a clean, dampened cloth using window cleaner GM P/N 1050427 (Canadian P/N 992727), or isopropyl alcohol in order to clean the surface of the perimeter of the sunroof window frame. Allow to air dry.

1. Position the sunroof window seal into the gutter of the sunroof window frame.
2. Firmly press the sunroof window seal into place.
3. Install the sunroof window. Refer to «Sunroof Window Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .

Scheme 5

1. Place the module in the full open position.
2. It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the part. Refer to «Headlining Trim Panel Replacement»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
3. Disconnect the electrical connector from the motor/actuator.
4. Remove the motor. Refer to «Sunroof Motor/Actuator Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
5. Push the window guides rearward on the track until the guides are positioned against the rear hard stop.

1. Install the motor. Refer to «Sunroof Motor/Actuator Replacement»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .
2. Connect the electrical connector to the motor/actuator.
3. Install the headliner. Refer to «Headlining Trim Panel Replacement»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
4. Perform the Initialization/Teach Procedure. Refer to «Sunroof Motor/Actuator Initialization/Teach Process»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-motoractuator-initializationteach-process) .
5. Verify the operation of the sunroof.

Sunroof Window Height and Opening Fit Adjustment

1. Slide the sunroof sunshade to the open position.
2. Move the sunroof glass panel to the fully closed position.
3. Loosen the sunroof glass panel screws.
4. Individually adjust the 4 corners (1) of the sunroof glass panel.
5. Adjust the front of the sunroof glass panel to 1.5 mm (0.050 in) below the top surface of the roof panel (3).
6. Adjust the rear of the sunroof glass panel to 1.5 mm (0.050 in) above the top surface of the roof panel (2).
7. Tighten the sunroof glass panel screws. Tighten: Tighten the screws to 4 N.m (35 lb in).

1. Position the sunshade panel fully rearward.
2. Position the sunroof window panel to the vent position.
3. Remove the sunroof window panel screws from the sunroof window panel.
4. Remove the sunroof window panel from the sunroof module.

1. Position the sunroof window panel to the sunroof module. Ensure that the information logo stencil is towards the rear of the sunroof opening.
2. Install the sunroof window panel screws to the sunroof window panel. Tighten: Tighten the sunroof window panel screws to 4 N.m (35 lb in).
3. Adjust the sunroof window panel as necessary. Refer to «Sunroof Window Height and Opening Fit Adjustment»(/chevrolet/impala/ix-2006-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-window-height-and-opening-fit) .
4. Inspect the sunroof window panel for proper operation.

The Power Sunroof System consists of the following components

1. Sunroof control module
2. Sunroof switch
3. Sunroof glass
4. Rail and track assembly upon which the sunroof glass rides
5. Sunroof sunshade
6. S/ROOF 20A Fuse
7. Ground G301

Power and Grounds

Battery positive voltage is supplied at all times to the sunroof control module from the 20 A S/ROOF fuse located in the instrument panel fuse block. Ground is supplied to the sunroof control module through the module ground circuit and G301.

Ground is supplied to the sunroof switch through the switch ground circuit and G301.

Power Sunroof Operation

The Power Sunroof System will operate only with the ignition turned to the RUN or Accessory position, this allows for retained accessory power (RAP) control of the sunroof through the body control module (BCM). With the ignition in the run or accessory position, the BCM supplies the sunroof with ignition voltage which allows sunroof operation. Once the ignition switch is turned off the sunroof will continue to operate until any door is opened or when the RAP timer reaches its shut-off limit. For a description and operation of the RAP operation, refer to Retained Accessory Power Description and Operation .

When the sunroof is commanded to open, it will move the sunshade to the open position as well. The sunshade can be manually opened and closed from inside of the vehicle while the sunroof is in the closed position. The sunshade is designed to stay in the open position while the sunroof is in the open position.

Any water that passes the roof seal is drained from the sunroof tray by 4 tubes that lead from the corners of the tray to the rocker panels of the vehicle. The tray which acts as a framework for the sunroof assembly, has a water channel that encircles the sunroof opening and directs the water to the drain tubes.

Sunroof Switch Operation

When the sunroof is in the closed position, it can be raised to the vent position by pressing the OPEN side of the switch once. The sunroof may then be expressed to the fully open position by momentarily pressing the OPEN side of the switch a second time, or it may be adjusted to any preferred open position by pressing and holding the OPEN switch until the sunroof has reached the desired position. To fully close the sunroof, press and hold the CLOSE side of the switch. Release the CLOSE side of the switch in order to stop the sunroof at any preferred closed position. Whenever the sunroof is in the express open mode, it can be stopped by momentarily pressing either side of the switch.

Sunroof Control Module

The sunroof control module is located between the headliner and the roof structure, while the sunroof switch is located above the rearview mirror. The sunroof control module supplies voltage to the contacts of the sunroof switch through the sunroof switch close signal circuit and the sunroof switch open signal circuit. The sunroof control module also supplies ground to the switch contacts through the sunroof switch low reference circuit. When the switch is operated, the contacts and signal circuit for the selected mode are closed to ground, the voltage is pulled low in the sunroof control module, and the appropriate signal is recognized by the sunroof control module. The sunroof control module then internally applies battery positive voltage and ground to the appropriate circuits of the reversible motor in order to move the sunroof glass to the open, close, or vent position.

See also:
• Diagnostic System Check - Vehicle
• Checking Aftermarket Accessories
• Testing for Intermittent Conditions and Poor Connections
• Retained Accessory Power Description and Operation
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS -- INDEX
• Circuit Testing
• Connector Repairs
• Wiring Repairs
• Diagnostic Repair Verification
• Control Module References
• Fastener Caution
• Headlining Trim Panel Replacement
• Sunshade Replacement
• Rear Seat Back Cushion Replacement (Impala)
• Fastener Tightening Specifications
• Roof Console Replacement
• Sunroof Description and Operation
• Sunroof Motor/Actuator Initialization/Teach Process
• Sunroof Window Height and Opening Fit Adjustment