How to test USB socket data lines?

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  1. Posts : 7,828
    Windows 11 Pro 64 bit
       #1

    How to test USB socket data lines?


    I've having problems with the USB A plug in connector in my car. I have a USB tester which shows that +5V is available at the socket output but how do I test if there is a problem with the data lines due a poor connection or other problems?
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  2. Posts : 2,264
    Windows 10 Pro/Windows 7 Ultimate
       #2

    I wasn't aware cars sent data to the USB connector. Just power.

    If you Google USB Sniffer there are several. On the free side Wireshark can do it.

    USBPcap

    USB

    USBPCAP and Wireshark. How to capture USB data and filter - How to capture USB traffic - YouTube
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  3. Posts : 7,828
    Windows 11 Pro 64 bit
    Thread Starter
       #3

    F22 Simpilot said:
    I wasn't aware cars sent data to the USB connector. Just power.

    If you Google USB Sniffer there are several. On the free side Wireshark can do it.

    USBPcap

    USB

    USBPCAP and Wireshark. How to capture USB data and filter - How to capture USB traffic - YouTube
    Many cars including mine use the USB socket for playback of music files from a USB stick. My car also needs the USB connection to update the infotainment software from a USB stick.
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  4. Posts : 22,654
    Win 10 Home ♦♦♦19045.4046 (x64) [22H2]
       #4

    Steve C said:
    Many cars including mine use the USB socket for playback of music files from a USB stick. My car also needs the USB connection to update the infotainment software from a USB stick.


    Maybe test with some songs. ^^
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  5. Posts : 7,828
    Windows 11 Pro 64 bit
    Thread Starter
       #5

    Ghot said:
    Maybe test with some songs. ^^
    That's the problem since playback of songs keeps dropping out at random for several seconds
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  6. Posts : 22,654
    Win 10 Home ♦♦♦19045.4046 (x64) [22H2]
       #6

    Steve C said:
    That's the problem since playback of songs keeps dropping out at random for several seconds


    I know this will sound weird.... try cleaning the USB stick's connector with Isopropyl Alcohol.
    I had a problem where my USB Joystick had connection problems, and I solved it by cleaning it.

    It didn't even look dirty, but I guess it was.
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  7. Posts : 15,351
    Windows10
       #7

    Apart from @Ghot's suggestion, probably not a lot else you can do.

    I used to get issues with a usb cable in from a TV socket to charge a device, and when I investigated further, the tv socket was only intended for diagnostics and could not guarantee a constant voltage. In fact as I searched around web, it seemed this was more common than I would have expected.

    I could easily see voltage fluctuations in a car being worse than one would get say on a pc. You might want to check the voltage under different situations e.g. engine on, off etc over a period of time to eliminate voltage fluctuation as an issue.
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  8. Posts : 712
    Windows 10 Pro
       #8

    What car are we talking about? It may be an issue with the vehicles infotainment system software /hardware.
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  9. Posts : 7,828
    Windows 11 Pro 64 bit
    Thread Starter
       #9

    It's a new Kia Niro. I've now booked it in for a warranty job to check the USB connector and cabling since I've done all I can to clean the connectors.
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  10. Posts : 2,264
    Windows 10 Pro/Windows 7 Ultimate
       #10

    So you're referring to the radio? Not just some USB plug found in the car? That would be the difference in what the issue could be.

    Try another USB stick is another option. SanDisk, Kingston or something that's really brand name.
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