OBDII365.com here shows 3 ways to fix connector firmware for Launch Smartlink C V2 VCI.
This step-by-step guide helps technicians update or repair the connector
firmware to ensure stable communication and optimal diagnostic
performance.
Way 1: via WLAN
Connect the Smartlink C V2.0 to the OBD diagnostic port and power it on.

Waiting the Smartlink VCI for to boot up.
Check the settings icon in the upper right corner.
Select Firmware Repair.

Wait for the upgrade to complete.

Way 2: via Network Cable
Update can also be made by connecting a network cable.
Connect the Smartlink C V2 via network cable.
VCI will check latest updates.
Check the settings icon in the upper right corner.
Select Firmware Repair.
Hit Start Repair.
Wait for the upgrade to complete.
Way 3: via Launch X431 Tablet
In Launch X431 diagnostic system, go to Diagnostic Kit- Fix Connector Firmware.
Select Firmware Fix.
The main unit will connect to Smartlink C V2.0 via Bluetooth.
Wait until firmware fix completed.









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