Subaru 2009 IMPREZA Service Manual page 2665

POWER ASSISTED SYSTEM (POWER STEERING)
Fluid leaking area
Leakage from the connections of pipes
and hoses, numbered (1) through (8) in
the figure
Leakage from hose (9) through (13) in the
figure
Leakage from surrounding of cast iron
portion of oil pump, (14) and (15) in the
figure
Leakage from oil tank, (16) and (17) in the
figure
Leakage from filler neck of (18)
Leakage from power cylinder of gearbox
area (19) in the figure
Leakage from (20), (21) in the figure and
control valve of gearbox
Pipe Assembly
(15)
(3)
(19) (2)
(4)
(21)
(1)
(20)
Possible cause
Insufficient tightening of flare nut, adhesion
of dirt, damage to flare or flare nut or eye bolt
Improper installation of hose or clamp
Damaged O-ring or gasket
Crack or damage in hose
Crack or damage in hose hardware
Damaged O-ring
Damaged gasket
Crack in oil tank
Damaged cap gasket
Crack in root of filler neck
Fluid level too high
Damaged oil seal
Damaged gasket or oil seal
Damage in control valve
PS-42
(7)
(14)
(8)
(12)
(5)
(6)
(10)
(13)
Loosen and retighten. Replace if
ineffective.
Retighten or replace the clamp.
Replace the O-ring, gasket pipe or
hose with new part, if still no
improvement, replace the gearbox as
well.
Replace with a new part.
Replace with a new part.
Replace the oil pump.
Replace the oil pump.
Replace the oil tank.
Replace the cap.
Replace the oil tank.
Adjust the fluid level.
Replace the oil seal.
Replace the problem parts.
Replace the control valve.
(11)
(16)
(18)
(17)
(9)
PS-00805
Corrective action