Because there is no downloadable software for the ScanGauge II, you must follow the manufacturer's factory upgrade procedure:
Before starting the update process, verify if your unit actually needs one: how to update scangauge 2 firmware
The upgrade service is typically a paid request unless specified otherwise by recent promotions or purchase dates. Visit the Official Upgrade Page: Navigate to the ScanGauge Upgrade Request Complete the Form: Because there is no downloadable software for the
The final phase is the update itself, which is an automated but fragile process. In the updater software, click the button and navigate to the .hex firmware file you extracted from the ZIP download. Select the file and confirm. The software will then begin transmitting data to the ScanGauge II. You will see a progress bar and a series of flashing lights or messages on the ScanGauge display. Under no circumstances should you interrupt this process. Do not disconnect the cable, close the software, or turn off the vehicle’s ignition. A failed update due to power loss or cable disconnection can “brick” the device, rendering it inoperable and requiring a return to the manufacturer. The entire process typically takes 60 to 90 seconds. Upon completion, the software will display “Update Successful,” and the ScanGauge will reboot automatically. Select the file and confirm
. Unlike the newer ScanGauge III, which supports Wi-Fi updates, the ScanGauge II does not have a user-accessible interface for online or DIY firmware downloads. 1. Verify Your Current Firmware