Project Ginsu - G8 Sunroof Controller Add-on
Inspired by kbueckert's work on G8Board, Project Ginsu is an add-on module for the factory sunroof control module. It does not replace the module, but rather interfaces with it and is interposed between the switch and the module. This lets it "talk" to the module with some intelligence and control power to the module, allowing it to add several useful features.
Feature List
- For 2009.5 model year G8's, the roof will move to the selected position when the position is selected with the switch, with no need to hold the button.
- When the car is turned off, if the roof is open it will automatically close. This feature can be disabled. Optionally, if the roof is open to a "vent" position, the roof will not auto-close.
- If the roof automatically closed last time the car was turned off, it will automatically re-open to the last remembered position when the car is restarted. This feature can be disabled.
- Backwards compatibility with 2008/2009 G8's is supported to also provide those model years with auto-close/open functionality.
- All solid-state design has no moving parts to wear out.
- Fully plug-and-play using GM harnesses. No need for soldering or cutting of stock wiring.
Current Target Price: $100
Current Project Status: In Development
Current Project Phase: Programming
Remaining Tasks:
- Complete programming - In progress
- Prototype fully custom circuit onto new breadboard with custom power supply - In progress
- Create custom prototype board and solder components onto board
- Alpha test board in own car
- Beta test several copies in local Raleigh volunteer vehicles
Current Project Teaser
Full Description of Features
- Sunroof Switch Operation
For both 2009.5 and 2008/2009 model year cars, the desired sunroof position may be selected by turning the switch and tapping the button to select the desired position. Optionally, the controller may be configured to operate like a 2008/2009 controller: turn to open, press to pause.
NOTE: 2008/2009 model year cars that do not support pausing currently will not be able to support pausing with my module. This may change.- Auto Close
After the ignition is turned off, the controller will offer a ~5 second window during which the user may select a new position or cancel the close by selecting the current position. If the user does not, the roof will fully close and the module will be powered off. Optionally, vent positions may be excluded from auto-close.- Auto Open
When the ignition is turned on, if the roof was previously allowed to auto-close, it will beep twice and notify the user with a flashing LED that it is about to restore the previous sunroof position. After a ~10 second window the roof will auto-open. Pressing the button on any position will cancel the auto-open.- Menu Configurability
A menu will be offered through the switch by pressing and holding on the "Roof Close" position by which you may configure the module. You will be able to tell it how your stock roof operates: 2009.5 requiring button hold, 2008/2009 supporting turn-to-open and pause, 2008/2009 supporting only turn-to-open. You will also be able to turn off the beep and enable/disable auto-close and auto-open.- Panic Mode
The 2009.5 model year change was likely made due to a safety defect in the module by which the obstruction detection does not function properly. Building a module which forces the roof to operate continuously until it reaches the desired position defeats this safety feature. In an attempt to provide some safety and security, I will attempt to implement a "Panic" feature by which a quick double-tap on the switch will shut off power to the module, bringing the roof to a halt. Thereafter, the desired new position should be selected to open the roof and clear the obstruction.
Disclaimers
I apologize if these seem a bit harsh, but after seeing how the thread on G8Board went downhill, I feel these are necessary.
- If you feel you are able to assist me with this project, feel free to send me a PM. If I accept your offer of help, terms will be discussed in email or PM. However, having merely offered help grants you no rights to determine scheduling, feature set, or price of the final product.
- Feel free to suggest features. I will take them into consideration, but I am under no obligation to accept your suggestion. Further, acceptance of your suggestion grants you no rights or entitlement to proceeds of any profits I may garner from this project, nor does it grant you a say in scheduling, feature set, or price of the final product.
- As mentioned above, the GM sunroof module reprogramming between 2008/2009 and 2009.5 likely exists due to a defect in the obstruction detection of the Webasto module. Requiring that the user hold the button is safer in case someone inserts their arm into the sunroof while it is closing. My controller add-on will defeat this safety feature. As such, your use of this product affirms your consent to waiver of liability in case of injury or damage resulting from the use of this add-on. Should this project make it to production, I will include a proper waiver with each module. I will endeavor, however, to add safety to the product by building in a "panic" mode that will kill power to the module, stopping the roof.
- If I find I am unable to complete this project satisfactorily, I reserve the right to withdraw this project with no final product produced or sold.
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2009 G8 GT MGM. 
