Grand Cherokee 2006-2007

Sunroof

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Power Sunroof



Diagnosis & Testing

Refer to the list below for possible causes. Before beginning sunroof diagnostics verify that all other power accessories are in proper operating condition. If not, a common electrical problem may exist. Refer to Wiring Diagrams, in this publication for circuit, splice and component descriptions. Check the condition of the circuit protection (20 amp circuit breaker in the Junction Block). Inspect all wiring connector pins for proper engagement and continuity. Check for battery voltage at the power sunroof controller, refer to Wiring Diagrams, for circuit information. If battery voltage of more than 10 volts is detected at the controller, proceed with the following tests (the controller will not operate at less than 10 volts).

  1. Sunroof motor inoperative. Possible causes:

    Faulty control switch.
     
    Faulty circuit ground between sunroof module, control switch, and body harness.
     
    Faulty power circuit between sunroof module, control switch, and body harness.
     
    Faulty sunroof drive motor.
     
    Faulty sunroof module.
     

  2.  
  3. Audible whine when switch is depressed, sunroof does not operate. Possible causes:

    Binding cable.
     
    Faulty sunroof drive motor.
     

  4.  
  5. Audible clicking or ratcheting when switch is pressed, sunroof does not operate. Possible causes:

    Broken or worn drive cable.
     
    Worn drive motor gear.
     
    Mechanisms not synchronized.
     

  6.  
  7. Sunroof vents and opens, but does not close. Possible causes:

    Broken or disengaged trough guide
     
    Binding cable.
     
    Faulty circuit.
     
    Faulty control switch.
     
    Faulty sunroof module.
     
    Faulty drive motor.
     

  8.  
  9. Sunroof vents, but does not open. Possible causes:

    Faulty control switch.
     
    Faulty circuit.
     
    Binding cable or mechanism.
     
    Faulty sunroof module.
     

  10.  
  11. Sunroof does not vent. Possible causes:

    Faulty control switch.
     
    Faulty circuit.
     
    Binding cable or mechanism.
     
    Faulty sunroof module.
     

  12.  

Any diagnosis of the power sunroof system should begin with the use of a scan tool and the proper Diagnostic Procedures Information. The scan tool can provide confirmation that the Controller Area Network (CAN) Data Bus circuit is functional, that all of the electronic modules are sending and receiving the proper messages on the CAN Data Bus, and that the power sunroof motor/module assembly is being sent the proper hard wired output by the sunroof switch.

Removal & Installation
Motor

WARNING
Do not attempt to move or reposition the sunroof glass panel or drive cables with the motor/module removed. Vehicle/sunroof damage or personal injury may result. The sunroof must first be calibrated and the Motor/Module Initialization Procedure must be completed any time a sunroof motor/module is replaced with a new component. Failure to perform this procedure could result in vehicle damage and/or personal injury.

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Disconnect and isolate the battery negative cable.
  4.  
  5. Remove the vehicle headliner:
    1. Remove the A-pillar trim panels.
    2.  
    3. Remove the sun visor supports.
    4.  
    5. Remove the sun visors.
    6.  
    7. Remove the overhead console.
    8.  
    9. Remove the overhead video monitor.
    10.  
    11. Remove the left upper b-pillar trim panels.
    12.  
    13. Remove the grab handles above each rear passenger door.
    14.  
    15. Remove the left upper c-pillar trim panels.
    16.  
    17. Remove the upper liftgate trim panel.
    18.  
    19. Remove the D-pillar trim panels.
    20.  
    21. Pull the top of each door seal downward slightly.
    22.  
    23. Fold the rear passenger seats down.
    24.  
    25. Disconnect the headliner wire harness connector located at the left A-pillar.
    26.  
    27. If equipped, disconnect the headliner wire harness connector(s) from the inside rear view mirror and the rain sensor.
    28.  
    29. Lower the rear of the headliner downward from the roof panel and disconnect the rear washer hose.
    30.  
    31. Disconnect the headliner wire harness connector located at the left D-pillar.
    32.  
    33. Lower the front of the headliner downward and remove the headliner through the liftgate door opening.
      NOTE
      Be careful not to crease the headliner.

    34.  

  6.  
  7. Remove the power sunroof motor/module electrical connector.
  8.  
  9. Remove the retaining screws and remove the motor/module from the vehicle.

    Click image to see an enlarged view

    Fig. Power sunroof motor/module mounting

  10.  

To install:

  1. Position the power sunroof motor/module in the vehicle.
  2.  
  3. Install the motor/module retaining screws. Tighten the screws to 35 inch lbs. (4 Nm).
  4.  
  5. Connect the motor/module electrical connector.
  6.  
  7. Partially install the vehicle headliner and connect all remaining sunroof electrical connectors.
  8.  
  9. Connect the battery negative cable.
  10.  
  11. Perform the sunroof position calibration:
    1. Turn the ignition to the RUN position.
    2.  
    3. Press the vent button on the power sunroof switch and hold until the sunroof glass panel has moved to the full vent position and the motor movement has stopped for at least 1 second.
    4.  
    5. Press the close switch on the power sunroof switch and hold for a moment (at least 100ms) and release. The sunroof glass panel should continue travel to the full close position. If the sunroof glass panel does not return to the full close position, refer to the appropriate diagnostic information for full system diagnosis.
      NOTE
      Verify the battery is in good condition prior to performing this procedure. Do not leave the vehicle on a battery charger while performing this procedure. If the voltage at the sunroof motor/module drops below 11 volts or exceeds 15 volts at anytime while this procedure is being performed, the motor/module initialization procedure will not be properly completed.

    6.  

  12.  
  13. Perform the Motor/Module Initialization Procedure:
    1. Turn the ignition to the RUN position.
    2.  
    3. Press the vent button on the power sunroof switch and hold until the sunroof glass panel has moved to the full vent position and the motor movement has stopped for at least 1 second.
    4.  
    5. Press the close position on the power sunroof switch and release. The sunroof glass panel should continue travel to the full closed position. This will be considered the first sunroof closed position in a series of four sunroof closes.
    6.  
    7. Press the vent button on the power sunroof switch and release. The sunroof glass panel should move to the full vent position. After the sunroof motor/module has stopped, press the close position on the power sunroof switch and release. The sunroof glass panel should continue travel to the full closed position. This will be considered the second sunroof closed position in a series of four sunroof closes.
    8.  
    9. Continue to move the sunroof glass to the -vent- then -closed- positions two more times so that the sunroof glass has moved to the closed position a total of four times.
    10.  
    11. Press the open position on the power sunroof switch and release. The sunroof glass panel should continue travel to the full open position.
    12.  
    13. Press the close position on the power sunroof switch and release. The sunroof glass panel should continue travel to the full closed position. This will be considered the first sunroof closed position in a series of five sunroof closes.
    14.  
    15. Press the open position on the power sunroof switch and release. The sunroof glass panel should move to the full open position. After the sunroof motor/module has stopped, press the close position on the power sunroof switch and release. The sunroof glass panel should continue travel to the full closed position. Continue to move the sunroof glass to the -open- then -closed- position four more times so that the sunroof glass has moved to the closed position a total of five times.
    16.  
    17. Verify proper auto reverse calibration by placing a standard pencil at the front of the sunroof and then moving the sunroof to the full closed position. The sunroof should reverse direction upon contact without damage to the pencil.
    18.  

  14.  
  15. Verify proper operation of the power sunroof system.
  16.  
  17. Complete the vehicle headliner installation.
  18.  

Switch

The power sunroof switch is part of the overhead console assembly and cannot be replaced separately. If the switch is damaged or inoperative the overhead console must be replaced.

 
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