Subaru 2002 Impreza Service Manual page 353

POWER STEERING SYSTEM
Power Assisted System (Power Steering)
Torsion bar
Sleeve
Rotor
Pinion
Pinion-to-rotor engagement (fail-safe feature)
Fluid passage VI
Fluid passage
V2
Fluid passage
V3
Fluid passage
V4
Groove C
Groove D
(1 2)
Torsion bar
(13) Rotor
(14)
Sleeve
(1 5 ) Fluid return line (to reservoir tank)
(16) Pinion
(1 7) Torsion bar
(18) Rotor
(A) Cross-sectional view A (fluid passage switching circuit)
(B) Cross-sectional view B (pinion-to-rotor engagement)
PS-9