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Experts in car diagnostics since 2001
  Home Product FAQs Cannot locate an interface...: Windows 98SE/ME

EngineCheck & VauxCheck - "Cannot locate an interface..."

(Windows 98SE / Windows ME)

EngineCheck and VauxCheck version 2.0 and above include an autodetect sequence, which attempts to locate your ELM chipset interface without the need to manually specify any settings.
However in some circumstances you may occasionally see the error message "Cannot locate an interface...":

interface not found

If this happens, it is usually caused by one of three things:

(1) The USB drivers for the interface are not installed or have become corrupted
(2) The interface is not currently connected to the PC and a car
(3) The interface does not respond quickly enough for the autodetect routine to locate it.

There are a few simple steps to diagnose and resolve the issue:
  • Firstly, ensure that the interface cable is connected to both the PC and the car, and that the car's ignition is turned on (so dashboard lights come on) before attempting to connect to it.
    This is the most common cause, and the easiest to fix!
If that doesn't resolve the issue, the next step is to check that the USB device drivers for the interface are correctly installed:
  • Open the Windows System Properties (located in Control Panel > System)

  • Select the "Device Manager" tab

  • This should show you if the drivers are correctly installed.

    Under the "Ports (COM & LPT)" section you should see a device labelled "USB Serial Port". If so, the drivers are correctly installed.

    However, if you see a device in the "Other devices" section, labelled "USB Device" or "USB <-> Serial Cable" with a question mark against it, this signifies the drivers failed to install correctly:

    Device Manager

  • If the drivers are NOT installed correctly, try reinstalling them first:

    - To do this, double-click on the "USB Device" - this will bring up the properties of the device:

    Properties of the unknown device

    - Click the "Reinstall Driver" button.

    This will start the Found New Hardware wizard and allow you to install the drivers.

    If you puchased your interface from us, then EngineCheck / VauxCheck will already have installed the driver files onto your system. For details on setting up those drivers, please click here.

    If you purchased your interface from another retailer, our USB drivers may not work for you, in which case you need to contact the retailer or manufacturer to obtain updated drivers.

  • If the drivers ARE installed correctly, but EngineCheck / VauxCheck still cannot locate the interface, it usually means that the interface is not responding quickly enough for the autodetect to notice it. To get around this issue, you may need to specify the port on which it is located.

    - Check in Device Manager which COM port your interface is using (in the screenshot above it is COM6), and select it when connecting.
    - Depending on your specific interface, you may also need to select the correct interface speed:

    Select the COM port and Interface Speed

    If none of these steps help resolve your issue, please contact us while you are plugged into a car, and we will do our best to resolve the issue
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