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Thread: OE message LCD CAN interface

  1. #11
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    It looks like justchat_1 was right, and my friend from IPD was wrong. This is out of the offical Volvo advanced diagnostics information system, specific info for my car:
    Quote Originally Posted by VADIS2004C
    The language in the combined instrument panel can be changed. This is done by ordering new software for the driver information module (DIM) from the replacement parts catalogue. In the replacement parts catalogue there is software for reloading the driver information module (DIM) (Reloading DIM) and software for changing to a number of different languages. Reloading reloads the same software that was installed before the control module was replaced.
    Since the language can be changed entirely via one module update, the text messages must be stored in that module.

    Oh well. Someday, when I have apsolutly nothing better to do, I may go to a junkyard and pick out a DIM to take apart and try to reverse-engineer the EEPROM. Till then

  2. #12
    Newbie DANNYDOTNET's Avatar
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    Quote Originally Posted by theshadow27 View Post
    Oh well. Someday, when I have apsolutly nothing better to do, I may go to a junkyard and pick out a DIM to take apart and try to reverse-engineer the EEPROM. Till then
    I saw a heads up display "projects onto the windshield" in the u-pull junk yard a month ago it was right there too for the taking. Then the next weekend it was gone. Oh well I still got a servo that day and the lady charged me five bucks thinking it was a relay. lol
    Good Luck
    Follow me on twitter @Danny117

  3. #13
    Variable Bitrate Saab9-5's Avatar
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    @theshadow27: I wouldn't dismiss it too quickly. The Saab has a similar LCD display and while some of the messages are reactions to specific CAN messages (and in specific languages), it can display two lines of user-generated text (with the right hardware/software of course).

    Look at Tomi Liljemark's website (http://pikkupossu.1g.fi/tomi/projects/i-bus/i-bus.html) on reverse enginerring the Saab's CAN bus protocol. It's because of his work that I've been able to send text messages to my SID using Microchip chips. A friend of mine and I are in the early stages of decoding the CAN messages for the message center in his Dodge Charger.

    Grabbing a DIM and listening to the bus will get you there. But as Dejan said, it is going to be manufacturer (and possibly even vehicle) specific.

  4. #14
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    volvo professional dignostic tool

    volvo vida dice can help you, it is a professional diagnostic tool for volvo cars, it can test the engine, fule injection, and so on , it will transfer the test data to the memory card. SO YOU WILL know what is wrong with the car,


    Quote Originally Posted by theshadow27 View Post
    My car (2005 Volvo S40) has an LCD in the gauge cluster (see top screen)which displays messages from the various computer modules in the car (like the door module, which sends a "passenger door open" message when you open the door) via a Controller Area Network (CAN) bus. I'd be willing to help develop a interface like connect but rather than outputting via RS232, outputs messages to the CAN bus.

    Many cars these days have similar screens, and they almost exclusively use CAN, however the protocols are probably different across makes, and even models. So the challenge is:

    1) Develop a CAN hardware platform that can automatically determine vehicle network speed and monitor messages.
    2) Create a USB interface that can log messages from the CAN bus.
    3) For each make/model, have the user log a bunch of messages while triggering things that show up on the LCD
    4) Start an online CAN message database/forum where CAN logs can be posted and us techies can figure out a "driver" for each vehicle
    5) Once there's a driver, allow it to be loaded in the device and connected to the V1

    I picked up two of these kits:
    http://www.microchip.com/stellent/id...t=MCP2515DM-BM
    And will play around when they show up. The order has been pushed back until 30-October though :/

  5. #15
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    @Saab9-5 - Thanks, I haven't completely given up. I found a DIM on eBay for $30, and while it won't work in my car, I'll try to get it running on the bench. Maybe suck out the flash on the controller... Lots of possibilities. I'll know more when it gets here.

    @andycjx - I have a copy of VADIS which is an older version of VIDA. The actual DiCE module is around $1500, and won't share any of the proprietary CAN information with it's user. It would help the process along much faster though, unfortunately it's out of the budget.

    @DANNYDOTNET - I was thinking about a HUD, and spent a few hours searching around. It doesn't look too hard to pull off. My fundamental problem with a HUD is that it projects an image on the windshield... Of all the things you don't want projected on your windshield in VA it's a radar detector's output!

  6. #16
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    FYI I got this somewhat working on my Mazda3. Displaying text of my Radio LCD is technically possible and actually quite easy to do. Problem is that there is no plug and play solution. You have to physically place some electronics in-between the wires going to the lcd. I tested this theory but with just tapping the wires and my text was displayed on the lcd, but soon enough the radio text overwrote my text. I had to keep sending my text every 100ms or so but eventually the car noticed it was receiving way to many text commands and decided to ignore them all. This is why you would have to sit in the middle of the commands.

    I may look into doing this correctly just for fun, but I personally have no practical use for it. Also the fact that it would be only for a Mazda3 and not easily upgradable to other cars (as the code would be on a microchip). If I made some PC software to do the work and not so much code with the microchip this would be doable and should be upgradable to all cars as the PC software would setup to know what commands are for the Mazda3 versus other cars.
    V1Connect - Valentine1 Serial Adapter http://www.v1connect.com

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