Took it to my Subaru dealer and they diagnosed it as motor not having much power anymore. Four hours labour plus motor came to $700. I question Subaru quality as we don't use it much in our climate.Took it to my Subaru dealer and they diagnosed it as motor not having much power anymore. Four hours labour plus motor came to $700. I question Subaru quality as we don't use it much in our climate.
AnonymousMay 07, 2015
Electric motors don't typically just "get weak," they lose lubrication and overheat, exacerbating the problem. I think the Subaru dealership took you for a ride.Electric motors don't typically just "get weak," they lose lubrication and overheat, exacerbating the problem. I think the Subaru dealership took you for a ride.
Electric motors do get WEAK when the brushes and commutator become worn and can not transfer enough electrical energy to operate at design torque/power...Electric motors do get WEAK when the brushes and commutator become worn and can not transfer enough electrical energy to operate at design torque/power...
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If the sunroof mechanism has not been lubricated on a regular basis (once per year), it is likely that some of the mechanism has become rusted or sticky. I would recommend lubricating all pivots and channels on the sunroof, and it will likely operate correctly again.
We had taken to a dealer , who advised that the motor would have to be replaced as it was getting weak ? LOL . Anyway they had lubricated it and works fine now , no charge.We had taken to a dealer , who advised that the motor would have to be replaced as it was getting weak ? LOL . Anyway they had lubricated it and works fine now , no charge.
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Ok, so the first poster obviously didnt read the question and just posted the first thing he googled.
So I'll try. You have a short, most likely on the actual drive motor itself or in the switch. I wouldn't bother with replacing the fuse again until you take the motor out or test the switch for a short.
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 .
Here's a description the sun roof
Power Sunroof System Components
The power sunroof system consists of the following components:
• Sunroof module
• Sunroof switch
• Sunroof motor, with 2 hall effect sensors and limit switch
• Sunroof window
• Sunroof sunshade panel
• Power supply for the sunroof module: RAP 25 A
• Ground G402
Override
The override function is used when needing to force a closing of the sunroof window. To override the system:
Turn ignition to ON.
Rotate the sunroof switch to the close position.
Press upward.
The sunroof switch data 6 circuit, or override circuit, will become grounded at the sunroof module. As long as the sunroof module sees this input, it will continue to slide the sunroof window to close, regardless of the other sunroof switch data circuits inputs.
Check the RAP fuse in the rear fuse box , this fuse powers the sunroof control module !
Fuse Block - Rear , Left rear of the passenger compartment, under the rear seat .
The sunroof module contains the logic for the opening and the closing of the sunroof. The sunroof motor assembly contains the reversible DC drive motor, the gear train, and the limit switch.
The sunroof module determines the sunroof motor direction based on inputs received from the overhead console sunroof switches. When the ignition switch is in the ON position or when retained accessory power (RAP) is active, voltage is applied to the sunroof module via the RAP relay. For a description and operation of the RAP system, refer to Retained Accessory Power (RAP) Description and Operation in Retained Accessory Power. The sunroof module controls the sunroof motor direction by changing the polarity of the applied voltage. The sunroof module remembers the sunroof position whenever the ignition switch is turned to the OFF position. The limit switch is used as an input to the sunroof module to indicate that the glass is fully closed, or in the comfort stop positions. The limit switch is grounded when the sunroof glass is in the fully closed or comfort stop positions, otherwise it is open.
The SLIDE CLOSE mode is initiated by moving and holding the sunroof slide switch (ROOF) forward. This applies a ground provided from the sunroof limit switch low reference circuit to the sunroof switch close vent signal input of the sunroof module. The sunroof module controls voltage to the control circuits of the sunroof motor. The sunroof motor will run until the limit switch contacts are closed. The closing of the limit switch will apply the sunroof limit switch low reference circuit to the sunroof limit switch soft stop signal circuit to the sunroof module, indicating the flush closed position has been reached. As the sunroof is approaching the close position the sunroof glass will force the wind deflector downward.
You need to have a factory scan tool hooked up an have it checked for DTC'S in the sunroof control module ! a code reader will not do this , a code reader will only check the engine codes for OBD 2 . Important: The following must be completed before using the symptom tables.
Perform Diagnostic System Check - Power Sunroof in order to verify that all of the following are true:
?€¢
No DTCs are set.
?€¢
The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions. Refer to Sunroof Description and Operation
Just out of curiosity, is it the motor that is faulty or one of the guides has broken? what are the symptoms you are experiencing?
IF you have a diagnosis and it is in fact the motor, here's how you replace it.
1. Fully close the sunroof glass, disconnect batt negative.
2. Remove Roof trim
3. disconnect Motor harness
4. Remove sunroof motor mounting screw and nut.
After installing the new motor you have to reset the sunroof motor.
A tip to help diagnose if you are just guessing for inop motor
(1) Check fuse for blow-out.
(2) Check switch for improper function.
(3) Check motor for incorrect terminal voltage.
(4) Check relay for improper operation.
(5) Check poor grounding system.
(6) Check harness for open or short and terminals for poor connections.
(7) Check limit switch for improper operation.
does the sunshade open and close properly,you should only be able to move this when the sunroof is closed it should move freely back and forth,if it doesn't this part is causing the noise, its off its track
I think I know the answer....your gear has slipped on the cable a few teeth. Set the roof to the desired closed position, flush with your roof. Then open the panel above the mirror by first prying off the switch plate and removing the two 10mm bolts holding the mirror. Remove the sunroof motor gear, or rather just lower it out so it is disengaged with the cables. Now connect the switch and hit the auto open button as if you wanted to open the roof with single flick of the switch. Now hit the auto close button (same button of course, but the single touch method). The motor will advance and stop to where it thinks the roof should be, closed, which it is. Reassemble the gear into the slot, test it if all good, replace the mirror and panel.
Good luck.
Manfred.
Took it to my Subaru dealer and they diagnosed it as motor not having much power anymore. Four hours labour plus motor came to $700. I question Subaru quality as we don't use it much in our climate.
Electric motors don't typically just "get weak," they lose lubrication and overheat, exacerbating the problem. I think the Subaru dealership took you for a ride.
Electric motors do get WEAK when the brushes and commutator become worn and can not transfer enough electrical energy to operate at design torque/power...
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