Do not connect the cable to the car yet; just connect it to the PC. Step 3: Open Device Manager Right-click the Start button and select .
After installing the driver, many users launch the software only to face a frustrating prompt: . This issue occurs because the software is looking for the cable on an unassigned or incompatible virtual communication port (COM Port). To fix this connection barrier, follow these steps: Open Device Manager again with the scanner plugged in.
Choose "USB Serial Converter A" and click Next. Click "Yes" if Windows warns you about driver compatibility 1.2.1. Step 4: Install Serial Port Drivers bmw scanner 140 drivers
. Look for "BMW Scanner" or "Unknown Device" with a yellow exclamation mark. Right-click it and select Update Driver Browse my computer for drivers
The scanner displayed a wealth of information, including engine speed, coolant temperature, and air/fuel mixture. John watched as the oxygen sensor readings fluctuated wildly, confirming that there was indeed a problem with the sensor. Do not connect the cable to the car
The underlying hardware for this diagnostic tool utilizes an FTDI USB-to-serial converter. Because the original software was written for Windows XP, modern editions of Windows 10 and Windows 11 will automatically reject the old, unsigned drivers for security reasons.
At its heart, the BMW Scanner 1.4.0 uses a common technology: an to communicate with your car's modules. This means the drivers you need aren't proprietary BMW software; they are generic drivers from FTDI (Future Technology Devices International) , the company that manufactured the communication chip. This issue occurs because the software is looking
Remove the four small screws holding the plastic casing of your BMW Scanner 1.4.0 cable together. Locate the circuit board where the OBD2 pins are soldered. Find the pins clearly labeled and 8 .
Look for an item with a yellow exclamation mark. It usually appears under Other devices as or FT232R USB UART . Step 4: Manually Install the Driver
These newer drivers do not recognize or support the older, often cloned FTDI chips used in aftermarket BMW Scanner cables.