Back up reports, logs, and any SOPS/vehicle files from your current 2.66.3.3 setup.
Perform a clean install of SDP3 v2.67.1.2 (recommended to avoid legacy leftovers).
Reboot, connect VCI2/VCI3 and run a communication test before connecting to a vehicle.
Whitelist the installation folder in security software if the installer or services are blocked.
Good practice
Use a regulated power supply during any programming or parameter write.
Save vehicle readouts before changes for rollback/reference.
Follow OEM licensing/authorization requirements for online and protected functions.
Disclaimer: This update note summarizes publicly available information and is provided for educational/informational purposes only. Any files referenced are user-submitted and may be hosted by third parties, forum staff does not verify ownership or licensing. Use Scania software strictly within applicable laws and the rights holder’s terms.