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Topic: Hacking the Volkswagen CAN-Comfort Bus (Read 12247 times) previous topic - next topic

Igor R

Apr 24, 2011, 06:24 pm Last Edit: Apr 26, 2011, 11:42 pm by Igor R Reason: 1

I´ve hacked some messages from the confort can bus (Volkswagen):


Window Control:

The example is a time control, but I´ve the position feedback message. And another more like clock, central locking, ....

(at the moment, it´s in spanish. The google translator works quite well).


Igor R.


What are your eventual plans for this newly gathered data?
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Igor R

Apr 24, 2011, 06:34 pm Last Edit: Apr 24, 2011, 06:43 pm by Igor R Reason: 1
The next step is connecting to the Traction Can Bus, which you can get 4 wheel speed, yaw, gLat, throttle position, etc....
The confort one, it´s interesting because you can control windows, locking, etc. You can implement the typical security feature that some cars have like when you are more than a certain among of speed, all the doors are locked (it´s just an example).

My main objetive is data acquisition with a good display and some math channels, but one time you are connected, who could resist don´t try to control some stuff??? hehehe


Igor R

Apr 26, 2011, 04:25 pm Last Edit: Apr 26, 2011, 04:28 pm by Igor R Reason: 1
Today, I´ve achieved to add the typical feature than in some cars are implemented (not in my golf iv).
Roll up/down the windows using remote key!! At the moment, 3 of them as I can't find how to do this with the front left window (driver).





I have an arduino UNO r3 and the 10039 can bus shield with an obd2 to db9 cable. I have mounted the shield onto the arduino. At first I wasn't getting anything from the system but then I disconnected the reset pin header and things are transmitting better now.

I still can't get any info from the car though. I haven't found a good program that would allow me to interpret can signals. Please help. How are you able to see the RPM's? Do I have my setup wrong? I have a 2006 passat btw. I have found a lot of info about the CAN network in the car I just can't access it!

Thanks, rob


I believe you will have to access the canbus from somewhere other than the obd connector.  I access my comfort bus from behind the radio in my VW.  In my car I also have a infotainment bus although most of the information I want resides on the comfort bus. 


Jul 31, 2015, 06:15 pm Last Edit: Jul 31, 2015, 06:16 pm by KenshinPT

This amazing!

I know some aftermarket products that can add other functions to the display.

But anyone knows how to build our own module to add even more information into the original MDF?

Do you believe that this involves changing the code (firmware) of the MFD?

Or adding more information is transparent to the MFD which accepts any information sent to it?

Any ideas or information?



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