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Thread: VW OBD-II / CAN Bus interface questions

  1. #11
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    I don't mean to hijack the thread. But has anyone used the VAG-COM SDK? Any opinions?

  2. #12
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    VAG-COM SDK? Where would I be able to download it?

  3. #13
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    Quote Originally Posted by jonee
    VAG-COM SDK? Where would I be able to download it?
    http://www.ross-tech.com/vag-scope/downloads.html

    It only seems to uncompress correctly with WinRAR

  4. #14
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    That's not an SDK, it's the VAG SCOPE program that draws the graphs and exports to .csv files.
    What does that program have to do with an SDK?

  5. #15
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    Quote Originally Posted by archimense
    I don't mean to hijack the thread. But has anyone used the VAG-COM SDK? Any opinions?
    there is no VAGCOM SDK
    MediaCar
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  6. #16
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    CAN Bus

    Hi,

    A CAN bus PCMCIA interface card can be found at National Instruments. This inculdes an API interface suitable for VC++/VB etc.
    Software is also included to view bus data, but you will need relevant info about your car to make sense out of this data.

    Or you could try Harrison

    OBD2 is dead.....

  7. #17
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    Quote Originally Posted by UKLooney
    OBD2 is dead.....
    Ummm, CAN is OBDII compliant.

  8. #18
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    I've recently gotten this USB to CAN adapter working with my 2003 A4

    http://www.phytec.com/can/hardware/p...ace/sysusb.htm

    The adapter is expensive (about $300 for the optically isolated model that i got) but i figure it saved me like 16 hours of time vs building one myself using the microchip can enabled microcontroller and it has pretty good software out of the box that lets you watch all of the can messages and send can messages too.

    So far, i've plugged it into the the comfort system bus on the yellow connector behind the AC controller (can high-pin 11, can low- pin 12) and the infotainment bus on the connector behind the Radio (the pins are listed on a label on the radio).

    I connected the high, low, and a ground signal. Not sure if the ground was needed, but connected it anyways just in case.

    So far, after a couple of hours playing with the thing, the results are promising.

    From the confort system bus, i was able to unlock/lock doors, roll up/down the power windows, read the location of the window position, flash the turing blinkers, read the position of the power window switches and blink the anti theft light in the drivers door.

    From the infotainment bus, i was able to read the position of the audio controls on the steering wheel, get the time and date from the instrument panel, get the illumination level of the instrument lights, and read the value of the light sensor on the rear view mirror.

    So far, i havent done any tests with the engine on nor the radio and the AC head plugged in (havent spliced any wires yet). After doig that, i see being able to read the speed of the car, and display custom messages on that LCD in the middle of the instrument panel.

    For most things, figuring out what the messages mean is easy. Like the steering wheel radio controls, you push a button and see a particular message being sent. Then you can send your own message with the same message ID and value and see what happens.

  9. #19
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    oh yeah, the audi infortainemnt and confort system can buses run at 100k baud. Havent plugged into the powertrain bus yet. I think that one runs at a faster rate.

  10. #20
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    Quote Originally Posted by waynel
    I've recently gotten this USB to CAN adapter working with my 2003 A4

    http://www.phytec.com/can/hardware/p...ace/sysusb.htm

    The adapter is expensive (about $300 for the optically isolated model that i got) but i figure it saved me like 16 hours of time vs building one myself using the microchip can enabled microcontroller and it has pretty good software out of the box that lets you watch all of the can messages and send can messages too.
    For those of us who cannot afford 300 but have 16 hours , how would one go about building one of these? I can't seem to find any info on the subject.

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