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Of course, it could be a dodgy chip in my cable, but I was trying to make it at least 1 week into ownership before I start replacing things without understanding why they're not working.Ģ of the computers we have are convinced they have the latest driver for this chipset/cable, and refuse to do any updates - even when I point the "update driver" option at a downloaded ftdi file I have. So my question is really: has anyone had any experience of this problem? or can suggest a place to ask? (I've not yet sussed out which of the various BMW forums I should join) Some articles suggest disabling USB3.0, but my bios has no such option, and others say everything is backwardly compatible anyway. There seems to be something about this DCAN cable that the computer doesn't like. So I don't think it's the slot itself or the computer as such. I have a VAGCOM cable and another OBD2 cable for my Triumph bike, both of which get recognised straight away by the PC when I plug them in.
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When I try to update the driver, the computer says I'm already using the best driver. I also used the DCAN driver from the CD that came with the cable, and still no change.
#USING INPA K DCAN DRIVERS#
I've reinstalled the FTDI drivers a few times - no change.
![using inpa k dcan using inpa k dcan](https://www.obd2tool.com/blog/wp-content/uploads/2020/05/BMW-INPA-K-DCAN-3.png)
In my case, my windows 8 laptop refuses to do this, instead saying "unknown USB device (device descriptor request failed) - error code 43. Until, I got to the part where you plug in the USB cable in and the computer recognises it as a "serial ports" I bought a white K+ DCAN cable (no switch, as I don't ever expect to have an older BMW) which came with a CD, and I gamely plodded my way through the instructions. However, I'm after a bit of help, and this forum seems like a good starting point. There are a couple of niggles I want to sort, and reading up suggests INPA is the tool to do it.