Check For Movement Of Sun Shade

Place a cloth on sunshade, and attach a spring scale to sunshade edge using a cloth.

Fig 1: Checking Movement Of Sun Shade
Courtesy of SUBARU OF AMERICA, INC.
Pull spring scale to measure force required to move the sunshade.
1. Force required to move rear sunshade: Less than 24.5+/-4.9 N (2.5+/-0.5 kgf, 5.5+/-1.1 lb)
NOTE: Considerable force is required to start sunshade moving, so take a scale reading when it begins to move smoothly.
If the force required exceeds specifications, check the following points:
Sunroof lid, sunshade and guide rail assembly for improper installation