Subaru 2009 IMPREZA Service Manual page 261

12) While checking the following, slowly turn the
crank pulley approximately 90° clockwise so that
the belt guide comes to the position shown in the
figure.
(1)
(5)
(3)
(1) The rear side belt is not twisted.
(2) The rib of the rear side belt is securely
placed on the groove of the A/C compressor
pulley.
NG
(2)
(4)
90
ME-03509
ME-03512
O O O O OK OK K K K K
ME-03516
ME(H4SO)-43
V-belt
(3) The rib of the rear side belt is securely
placed on the groove of the crank pulley.
NG
(4) The surface of the rear side belt is held by
the belt stopper.
(5) The rear side belt is securely placed on the
belt guide.
MECHANICAL
OK
ME-03518
ME-03513
ME-03530