Getting Started
2. Installing Brother Scanner Driver
How to Install Brother Printers and Scanner Drivers for Manjaro
3. Brother Scanning Get Started
Then to Get Started Brother Scanning
First, Check if Simple Scan is Installed with:which simple-scan
Possibly to Install it, play:
sudo pacman -Sy simple-scan
Turn On & Connect Printer/Scanner.
Finally, Launch Simple Scan to Start Scanning: