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Thread: Copying the Code from an ELM Chip

  1. #1
    Constant Bitrate csnowman00's Avatar
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    Copying the Code from an ELM Chip

    Okay heres my question:

    I recently ordered an ELM323 Chip for communication between by computer and the OBDII port on my Jeep Grand Cherokee...The part socked me $23 after shipping and it got me thinking...this IS a microchip brand microprocessor...so, is there anyway of extracting the code from it so it can be duplicated dirt cheap....

    i know it may not be the right thing to do, but as long as im not selling it - i dont see a problem

    whatcha think, is it possible?
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  2. #2
    See me in my wet t-shirt. stevieg's Avatar
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    It's not really expensive enough to worry about the cost, surely?

    $23 / 10 is dirt cheap in my book!
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  3. #3
    Variable Bitrate Saab9-5's Avatar
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    Also, Microchip processors have a read inhibit bit that can be set for copy protection. This will prevent a PIC programmer from reading in the firmware to do what you want to do.

  4. #4
    Constant Bitrate csnowman00's Avatar
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    aww, rats - it was worth asking....and hey im a cheap college student. i cant afford the $23 in the beginning!
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  5. #5
    Low Bitrate F4kk3r0's Avatar
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    It's possible

  6. #6
    Low Bitrate F4kk3r0's Avatar
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    The chip used in ISO is PIC16C505 I think. Do you have the PWM??

  7. #7
    Constant Bitrate csnowman00's Avatar
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    yes
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  8. #8
    Low Bitrate
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    I have a great familiarity with PIC chips and have researched their code security pretty throroughly. I have come to the conclusion that they are for all practical pruposes secure as long as the code protection bit is enabled upon programming. This is enabled on the ELM chips. There have been various hoaxes claiming to be able to read a locked down PIC but i havn't seen any valid ones.

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