Before establishing a connection between the laptop and the VVTuner CCM, the user must ensure proper communications settings. Furthermore, the serial port must not be in use by another program or application. You’ll need a 2.5 mm serial cable such as the Innovate / Microsquirt tuning cable.
The default VVTuner comm port setting is “COM1”. This can be changed by navigating to the “Communication” menu item and selecting “Settings…”. From here, the desired comm port can be selected. Upon choosing a valid port, pressing the “OK” button will enable VVTuner to use the selected comm port. Pressing the “Cancel” button will discard your change.