Question about 2010 Buick LaCrosse CXS

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Sunroof does not open. Fuse is ok and the shade operates normally.

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Jeff Armer

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Do you know how to do automotive electrical testing ?????? How to read a wiring diagrams ???? http://www.bbbind.com/free_tsb.html .Videos on youtube Ohms Law Tech Tip from L1 with Dave Hobbs Copy of Voltage Drop Essentials TST Motor Age The only way to find the problem , testing !

Sunroof Description and Operation (One Connector System)
Sunroof
This diagnostic procedure is to be used for the 1 connector Sunroof System that combines the sunroof control module with the sunroof motor/actuator.
The Sunroof System consists of the following components:
• BATT MAIN 2 Fuse 50 A
• Body control module (BCM)
• RAP relay
• S/Roof Fuse 20 A
• Sunroof module (includes sunroof motor/actuator)
• Sunroof switch
The Sunroof System is controlled by the sunroof switch and the sunroof motor/actuator assembly.
When the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the body control module (BCM) applies a ground to the RAP relay in the instrument panel (I/P) fuse block. This activates the RAP relay and allows battery positive voltage to be applied through the SUNROOF Fuse to the sunroof module. Ground for the sunroof module is supplied from G302.
The sunroof can be placed in 3 preset positions:
• Open
• Vent
• Closed
When the sunroof switch is placed in the OPEN position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof motor/actuator then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the full open position.
When the sunroof switch is placed in the VENT position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof module then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the VENT position.
When the sunroof switch is placed and held in the CLOSED position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch close signal circuit. The sunroof module then applies voltage to the sunroof motor close control circuit and applies a ground to the sunroof motor open circuit. The sunroof motor then closes the sunroof.
The sunroof can be placed in any preferred open position when:
• The sunroof is in the fully opened position by pressing and holding the sunroof switch in the CLOSE position until the panel has reached the desired position then release the CLOSE switch in order to stop the sunroof
• The sunroof is opening, it can be stopped by momentarily pressing either side of the switch.
The sunroof control module, sun roof actuator, and the sunroof motor are integral parts of the sunroof module assembly and are not service separately.

Your best bet , take it to a qualified repair shop or buick dealer .

Posted on Feb 24, 2017

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emissionwiz

Marvin

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SOURCE: 2010 Buick Lacrosse CXS Sunroof does not open. Fuse is ok and the shade operates normally.

The motor may be the problem, have that tested

Posted on Feb 10, 2017

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I have a 04 Pontiac G6 4 door sedan the sun shade opens up no problem but when I try to open the glass the first one lifts up but that's it the other 3 pieces dont


Power Sunroof System Components
The power sunroof system consists of the following components:
• One tilting glass sunroof panel--For sunroof vent functions
• Three sliding glass sunroof panels, which allow the sunroof to open in sections
• Power sunshade panel--An adaptable panel which is rolled out or rolled in and stored by the sunshade motor/actuator in order to cover or uncover the sunroof glass panels
• Power sunroof switch--A rotary style switch controlling sunroof switch signal inputs to the sunroof motor/actuator
• Power sunshade switch--A momentary press style switch controlling sunshade switch signal inputs to the sunshade motor/actuator
• Power sunroof motor/actuator--Comprised of both the sunroof motor/actuator and the sunroof electronic control module, it is sometimes referred to as the sunroof control module/motor assembly.
• Power sunshade motor/actuator--Comprised of both the sunshade motor/actuator and the sunshade electronic control module, it is sometimes referred to as the sunroof slave module.
Sunroof Motor/Actuator and Sunroof Switch
The sunroof motor/actuator assembly is located at the rear of the passenger compartment, above the rear view window, between the headliner and the roof structure. The sunroof motor/actuator assembly also contains the sunroof electronic control module and the two components are serviced together as a unit.
Battery positive voltage is supplied to the motor/actuator at all times through the 25-amp LAMELLA ROOF fuse located in the rear fuse block. Whenever the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the motor/actuator is also supplied battery positive voltage through the accessory voltage circuit and the 10-amp ROOF/HEAT SEAT fuse which is located in the body control module (BCM). The sunroof motor/actuator is grounded through splice S403 to body ground G302.
The sunroof motor/actuator supplies voltage to the sunroof switch through three internal resistors and three hard wire circuits. The 3 hard wire circuits are:
• Sunroof switch data 1 signal circuit
• Sunroof switch data 2 signal circuit
• Sunroof switch data 3 signal circuit
The sunroof switch, which is also grounded to G302, is a rotary style switch. When the switch control lever is turned in a rotational direction, the appropriate switch contacts and signal circuits for the selected mode are simultaneously opened and/or closed to ground in order to provide the appropriate combination of voltage signals to the sunroof motor/actuator. The sunroof motor/actuator interprets the signals, and then applies battery positive voltage and ground to the appropriate circuits of the integral power sunroof motor in order to move the sunroof glass panels. At the same time, the sunroof motor/actuator sends a serial data message, via the keyword 2000 serial data circuit, to the sunshade motor/actuator to open the sunshade panel in conjunction with the sunroof glass. As the sunroof glass panels slide rearward to the open position, the sunshade motor/actuator simultaneously rolls in the adaptable sunshade panel.
The sunroof switch is mounted in a bezel which is located above the rearview mirror.


Circuit/System Description
The sunroof system is controlled by the sunroof switch and the sunroof control module/motor assembly, which is also known as the motor/actuator assembly.
The sunroof control module is supplied battery positive voltage at all times through the 15A SUNROOF fuse located in the rear fuse block. Whenever the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the module is also supplied voltage through the accessory voltage circuit and the 10-amp ROOF/HEAT SEAT fuse located in the body control module (BCM). The sunroof control module is grounded through the ground circuit at G302.
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 module, and the appropriate signal is recognized by the control module. The control module then internally applies battery positive voltage and ground to the appropriate circuits of the reversible power sunroof motor in order to move the sunroof glass panel to the open, close, or vent


Do you know how to do electrical testing ?
Circuit/System Testing
Ignition OFF, disconnect the harness connector at the sunroof control module.
Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 1 and ground.
? If greater than the specified range, test the ground circuit for an open/high resistance.
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 a short to ground or an open/high resistance.
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.
Connect the harness connector at the sunroof control module.
Ignition OFF, disconnect the harness connector at the sunroof switch.
Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal B and ground.
? If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
Ignition ON, test for B+ between the signal circuit terminal C and ground.
? If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
Test for B+ between the signal circuit terminal A and ground.
? If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
If all circuits test normal, test or replace the sunroof switch.

Oct 13, 2017 | Pontiac Cars & Trucks

1 Answer

2001 yukon xl which fuse is the sunroof fuse


In the under hood junction box , fuse CTSY LP 15 amp . Instrument fuse panel PWR WDO CB 25amp .
Sunroof Motor Synchronization
Synchronization will be necessary anytime the sunroof module battery positive voltage circuit is interrupted. The sunroof module will be synchronized when the controller learns the full vent position. The sunroof system will ignore any open request until the system has been synchronized.
To synchronize the sunroof:
  1. Turn ON the ignition, with the engine OFF.
  2. Using the close/tilt up portion of the sunroof switch, operate the sunroof glass until it reaches the full vent position.
  3. Verify that the system operates normally.
Once the sunroof glass reaches the full vent position, the actual position is stored in the memory of the sunroof module. The sunroof module will stop the motor one motor revolution before the defined actual positions
Hope this help ! good luck !

Dec 24, 2014 | 2001 GMC Yukon XL

1 Answer

How do i close the sunroof on my 1999 toyota camry? it is stuck open with the bottom shade stuck.


you may have to strip out the roof lining to gain access to the sunroof component if you cant pull the sun visor free , dont keep pressing the power button as could at the least blow the fuse , at worst burn out the motor

Jun 12, 2014 | 1999 Toyota Camry

1 Answer

Sun roof won't open, but i hear the motor turning


Check for any obstruction in the rail.

Also, can check this procedure to test your components...
Power Sunroof - REMOVAL & INSTALLATION (click over pic for zoom)

Motor
See Figure 1
  1. Remove the sunroof switch panel by pushing it to the side and disengaging the pawl, then pulling it downward.
b5908ae.jpg

Fig. 1: The sunroof switch panel is retained by a metal clip
  1. Remove the sunroof switch bracket.
  2. Unplug the sunroof motor wiring harness connectors.
  3. Remove the sunroof motor mounting screws.
Disassembly of the sunroof motor is not recommended.

To install:

  1. Lightly lubricate the drive gear with grease and install the sunroof motor to the sunroof assembly.
  2. Plug in the electrical harness connectors to the sunroof motor.
  3. Operate the sunroof to verify proper operation.
  4. Install the sunroof switch bracket and the sunroof switch panel.

Sunroof
See Figures 2 and 3

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Fig. 2: Exploded view of the sunroof assembly on 1993-94 vehicles

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Fig. 3: Exploded view of the sunroof assembly on 1995-97 vehicles-1998 models similar
  1. Tilt up the sunroof lid.
  2. Remove the lid side trim.
  3. Remove the lid bolts and the lid assembly.
  4. Remove the rear drain mount screws and the drain.
  5. Remove the shade assembly holders from the sunroof frame.
  6. Remove the shade assembly.
  7. Remove the sunroof switch, interior accessories and headliner.
  8. Remove the switch bracket.
  9. Remove the motor assembly, spacer and clip.
  10. Remove the wind deflector mount holders from the sunroof frame.
  11. Remove the wind deflector.
  12. Disconnect the drain hose.
  13. Remove the sunroof brackets.
  14. Remove the sunroof frame assembly.
  15. Remove the link and wire assemblies.
To install:
  1. Tilt up the sunroof lid.
  2. Install the link and wire assemblies.
  3. Install the sunroof frame assembly.
  4. Install the sunroof brackets.
  5. Connect the drain hose.
  6. Install the wind deflector.
  7. Install the wind deflector mount holders on the sunroof frame.
  8. Install the motor assembly, spacer and clip.
  9. Install the switch bracket.
  10. Install the sunroof switch, interior accessories and headliner.
  11. Install the shade assembly.
  12. Install the shade assembly holders on the sunroof frame.
  13. Install the rear drain mount screws and the drain.
  14. Install the lid bolts and the lid assembly.
  15. Install the lid side trim.

Hope helps (remember rated this help).

Jun 03, 2010 | 1996 Nissan Maxima

1 Answer

Sunroof on 2003 vw beetle


there is a part of the shade jammed in the track if you remove the piece is jammed it will work properly

Aug 20, 2009 | 1993 Volkswagen Jetta

3 Answers

Volvo 2003 s60 sun roof do not open, fuse ok.


check your fuse in position 38 in the fuse box....this fuse is for the car's alarm system but also seems to work the sunroof, I have a problem with this fuse when its not blown the sunroof opens with no problems but when it blows the roof will not open I am not sure how they are tied in together but they are....so I would say that you have an electrical issue....do not replace the motor until you check this first

Jun 05, 2009 | 2003 Volvo S60

2 Answers

Sun roof does not work


Dear cz50001: there are only a few things that you, a weekend warrior can do to diagnose and/or fix the problem on your car.
Unfortunately the newer cars get, the more complex they get.
Unfortunately, your car is one which falls in the more complex category. Your car is designed with a "BODY CONTROL MODULE". This little gem gets input from nearly every electrical component in the car including the sunroof. In terms of what you can do to check it out: The fuse box inside the car has roughly 24 fuses positioned vertically 12x12. The fuse located at the lower left side of the box is a 10A "red in color" is for the sunroof. Remove it and look through it to see if it has been burned through the center. If it has, replace it and try the sun roof. If the fuse blows again, you have a short and it would be best left to a professional.
There is another set of circumstances which can occur that will render the sunroof inoperable. If the battery is disconnected or if the sunroof motor had been disconnected, the sunroof will stop operating. To reset the sunroof memory, with the key in the on position, push and hold the sunroof tilt switch in the forward (up) position until the sunroof is fully vented (tilted up) position. It should at that point operate normally. Should those two suggestions not solve your problem, it requires either a dealership with a specialized tool called CONSULT-11 to communicate with the BCM. There are some specialty shops such as mine equipped to deal with your car as well. However, most can not address this type of problem without this diagnostic tool. Good luck.

Apr 05, 2009 | 2005 Nissan Altima

1 Answer

2002 Oldsmobile Alero Sunroof Stuck in the Vent position


The sunroof continues to open and close normally from front to back, but the vent stays open.

Apr 01, 2009 | 2001 Oldsmobile Alero

1 Answer

Interior sunroof shade is stuck closed


a solution that i had is that if you can open your sunroof without it opening ur shade try that then fold the shade by pushing between or in the middle of it and popout the shade. this works but try not to push to hard or you can break the plastic runners on the side of the shade. check to see if nothing is in the way of the runners. then put back the back part first then slide it all the way to the back then, do the other part and clip them back together  (there might be a little metal piece that pushes your shades back so check that first to see if its there first)

Nov 25, 2008 | 2003 Hyundai Tiburon

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