Upgrade your SGII to the latest firmware AU version. When you purchase this service, please only send the Scangauge-II main unit back to us with a copy of your order number. We will upgrade the SGII and send it back to you. Current turnaround time is 1 week excluding shipping time.
The latest firmware is 4.52AU (Australian Version)
To know your current firmware:
From the Home Screen, push the lower right function button twice next to MORE. Next, use the upper left and right function buttons to cycle through the available options until you reach the screen titled Version.