To force the computer to use the same COM port number for the same device, perform the

following steps:

1. Connect USB cable to computer.

2. Connect the DIAGNOSTIC SYSTEM ADAPTER device with the USB interface to the

computer.

3. Let the computer install the device driver. Follow the on-screen instructions.

Once the device driver is installed, you can determine the COM port number that was assigned to

the device by using the Windows Device Manger. You can find the Device Manager utility

program on most computers by selecting Start > Control Panel > System from the System

window, select the Hardware table, and click on the Device Manger button. Expand the Ports

(COM and LPT) branch to see all of the COM ports on the computer.

The COM port for the USB serial bridge will show up in the list as USB Serial Port

(COMxx)where COMxx is the port number assigned to the USB serial device. You necessary

assigned to COM1 or COM2.

To force the FTDI driver software to always assign the same COM port number to the same

device, perform the following steps after the FTDI device driver is installed.

1. Double-click on the USB Serial Port (COMxx) in the Ports branch of the Device

Manger window.

2. This will open a new window showing the USB Serial Port (COMxx) Properties.

3. Select the Port Settings tab. Click on Advanced.

4. One the Advanced Setting for COMxx window, select the COM port Number that you

would like to assign to the USB serial bridge.

5. Set COM1 or COM2.

6. Click OK.

7. On the USB Serial Port (COM1) Properties, click OK.

8. One the Device Manager window, right click on the USB Serial Port item you just

configured, and select Disable.

9. Reconnect USB cable.