Hi, Follow this easy steps to update Sri Lanka Map in Civic 2017 (It may work with 2018 model)
1.
On the Navigation System go to Settings > Device > Update Map. Follow the on-screen prompts until instructions to “continue the update process” on this website appear.
Please note that after pressing “Update Map”, you must wait at least 1 minute before unplugging the USB drive from the USB port.
2.
Plug the USB drive into your computer and follow prompts on Garmin Express. Garmin Express will verify if there is a new map update available. Download https://www.garmin.com/en-US/software/express
Note: The map download time varies based on Internet connection speed and map region.
3. Download Sri Lanka Map here https://drive.google.com/file/d/0B0hRt-DMQ5KpN0pITlFWelNvbjg/view?usp=sharing
4. Once Garmin Express has finished copy and replace downloaded "gmapsupp" file to the USB.
5.
Plug the USB drive back into the vehicle USB port.
On the Navigation System go to Settings > Device > Update Map. Follow the on-screen prompts to complete the update.
Notes:
You cannot use the same map download for multiple Honda navigation systems. Doing this will result in a locked navigation device.
The map update will take up to one hour but may vary based on the map region. During this update your Honda navigation system must not be turned off. Therefore, the engine must be running while the vehicle is parked outside or in a well-ventilated area. Before getting started, familiarise yourself with and follow all applicable laws in your area. Please contact your dealer with any questions or concerns.
6. You arer Done. Enjoy....!!!