OBD-2 interface for Audi/VW - build it yourself

Hi there,


Sorry, it's possible that links to my responses might be helpful too. Sorry if this is annoying. oO


Sure, please provide the text you would like me to translate from German to English.

I would like to create an interface for my car.
During my search, I came across the following link:
http://hal9000.vc-graz.ac.at/3rdfloor/projects/diagnose/Diagnose-Interface.htm

As far as I can see, it can only read the 'K' and 'L' channels.
This means, on the one hand, that it will also work with my C4 (if I use that adapter to convert to a 2x2 configuration), but on the other hand, it also means that I can't access the CAN bus at all, and therefore I won't be able to read any of the new features like the gateway or engine control unit network, right?

As far as I understand from Audi, in addition to the CAN bus drive, there is also a CAN-Comfort feature in the diagnostic connector – is this what you're referring to (pin 2 - J1850 Bus+)?

Does anyone have a guide that covers CAN, J1850/Comfort CAN, as well as K and L lines?

Habe ich mich richtig ausgedrückt?


Best regards

JohnnyB wrote:

Hello, Sorry, it's possible that links to my responses might be helpful too. Sorry if this is annoying. oO Sure, please provide the text you would like me to translate from German to English. I would like to create an interface for my car. During my search, I came across the following link: http://hal9000...vc-graz.ac.at/3rdfloor/projects/diagnose/Diagnose-Interface.htm As far as I can see, it can only read the "K" and "L" channels. That means, on the one hand, that it will also work with my C4 (if I use that adapter to convert to a 2x2 configuration), but on the other hand, it also means that I can't access the CAN bus at all, and therefore I won't be able to read any of the new features like the gateway or engine control unit network, right? As far as I understand from Audi, in addition to the CAN bus drive, there is also a CAN-Comfort feature in the diagnostic connector – is this what you're referring to (pin 2 - J1850 Bus+)? Does anyone have a guide that covers CAN, J1850/Comfort CAN, as well as K and L lines? Habe ich mich richtig ausgedrückt? Sincerely,

Hi,

Unfortunately, the adapter you want to build uses optocouplers. This type of adapter is no longer supported by newer and future versions of VAG-COM.
You can find a kit with a professional OBD2 connector here:
http://shop.dieselschrauber.de/

A suitable adapter to convert it to a 2x2 configuration is also available.
http://shop.dieselschrauber.de/product_info.php/products_id/34

I am not aware of any construction instructions for CAN systems, and it is likely that such instructions will be scarce in the foreseeable future due to the significantly higher effort involved.
CAN support for VAG-COM and a corresponding adapter are currently under development at Uwe Ross GmbH. When available, it will also be integrated into the online shop here.

Best regards, Rainer.