Then, the real help arrives. Veteran members who understand the deep architecture of the device reply. They explain that the issue isn't just the driver file ( .sys or .inf ), it's the Bootloader . The clone devices often used a generic microcontroller to emulate the genuine Autocom hardware. To make the driver work, the user didn't just need a driver; they needed to force the firmware onto the device.
This level of repair is not for the faint of heart, but for those with advanced electronics skills, these guides can resurrect a device that would otherwise be considered e-waste.
"Hi friends. I bought a CDP+ interface. I installed the 2013.3 software, but the USB is not working. The device manager shows a yellow exclamation mark. Can anyone help?"
Ensure you have the driver package that matches your Autocom software version (e.g., 2020.23, 2021.11, or newer). Most software installations include a folder named Drivers or USB_Drivers within the main installation directory. If missing, look for standard FTDI or specialized CDP+ driver packages from verified automotive software archives. Step 2: Disable Windows Driver Signature Enforcement autocom cdp- usb driver software - MHH AUTO - Page 1
The "Page 1" thread you speak of usually centers around a specific, critical moment of failure for a user.
The solution lies in manually directing Windows to the driver files that are installed with the Autocom or Delphi software itself. Here is the step-by-step method:
If you are trying to revive your CDP today, here’s the distilled wisdom from Page 1: Then, the real help arrives
Open Device Manager (right‑click “This PC” → “Properties” → “Device Manager”). Look for a line containing “Autocom CDP + USB” with a yellow exclamation mark inside a yellow triangle. There may also be a line labelled “USB Serial Port” with the same warning icon.
For example, a user upgraded to a new laptop with UEFI BIOS and Windows 8.1 only to encounter the error “unknown USB device (Device descriptor request failed)”. The solution provided by another member was to manually point the driver update to C:\Program Files (x86)\Delphi Diagnostics\DS150E (New VCI)\Driver (on 64‑bit systems) or C:\Program Files\Delphi Diagnostics\DS150E (New VCI)\Driver (on 32‑bit systems).
The Autocom CDP+ diagnostic tool requires proper FTDI-based USB drivers, often located in the software installation directory (e.g., C:\Program Files (x86)\Autocom\Cars CDP+\Drivers The clone devices often used a generic microcontroller
: Windows blocks the driver installation, citing unsigned driver digital signatures (common on Windows 10 and Windows 11). Step-by-Step Guide to Installing Autocom CDP+ USB Drivers
The Autocom CDP+ USB driver facilitates essential communication between diagnostic hardware and a computer, often requiring manual installation through Windows Device Manager, say user forums. Users frequently report needing to disable driver signature enforcement for successful installation on newer Windows operating systems. Reviews on forums like MHH AUTO describe the software as reliable once properly installed, with troubleshooting often necessary for the USB-to-serial connection. For more on installing USB serial converter drivers, see Microsoft Q&A . Autocom Cdp Usb Driver - Google Groups
Click , navigate to your Autocom installation folder, select the Drivers directory, and click Next .
: Windows Update frequently overrides custom diagnostic drivers with generic Microsoft equivalents. To stop this, roll back the driver or reinstall the dedicated FTDI driver files manually using the step-by-step method outlined above. Firmware Update Failures