When it comes to my 2006 Mitsubishi Outlander, when I pull back on the wiper control arm, the wiper juice pump(s) kick in, juice sprays on the windshield and the wipers move.
Not so with the Subaru! When I pulled back on the wiper arm, the wiper blades started moving...but there was no way I could get it to spray any juice, even though the control arm is clearly marked "Pull Mist" - whatever that means!
So I went about isolating the problem - which ended up being between my ears!
This video details my deductive process to finally figure out how to get juice on the front windshield - a solution I finally reached - but one that was (clearly) non-intuitive!
I can only conclude that it must be extremely foggy in Japan. That's the only reason I can determine to have a wiper mode in a car that actuates the wiper blades to cycle once...and emit no juice!
N.B.: If you want juice, just push the button on the end of the wiper stem. :)