General Troubleshooting; Troubleshooting (Power Steering System) - Honda Prelude 1993 Service Manual

Troubleshooting (Power Steering System)
General Troubleshooting
Check the following betore you begin:
a Has the suspension been modified in a way that would affect steering?
a Are tire sizes and air Dressure correct?
a ls the steering wheel original equipment or equivalent?
a ls the power steering pump belt properly adjusted?
a ls steering fluid reservoir filled to proper level?
a ls the engine idle speed correct and steady?
Hard Steering
Assisl in one direction only, little or
no assist in the olher.
Little or no assist in both directions
with car parked.
R e m o v e t h e v a l v e b o d y u n r t a n d
c h e c k t h e p i n i o n p i n f o r f r e e m o v e -
m e n t . l f O K , c h e c k l h e 4 w a y v a l v e
f o r
f r e e m o v e m e n t
( s e e p a g e
1 / , 1 0 7 | .
R e p a i r a s n e c e s s a r y .
Check for bubbles in power steer-
ing fluid.
It there are bubbles, check the
reservoir inpul side hoses and
pump front seal lor air leaks.
Repair as necessary.
l{ there are no bubbles, check i{
assist improves when engine speed
is increased lC| 3,O00 rpm.
lI assist does nol improve, check
tluid pressure, using power steer-
ing pressure gauge with shut off
valve closed (see page 17-78).
lf assist improves, check the pump
flow control volve lor internal leak'
ing, and clean or replace as
necgssary (see page 17-98). lf the
valve is OK, replace the steering
Fluid pressure 7,00O 8.O00 kPa
l 7 o - 8 0 k s l c n ' . 9 9 5 - 1 . 1 3 8 p s i ) .
Fluid pressure below 7,000 kPa
(7O kglcm2, 995 psi).
T h e p u m p i s O K . M e a s u r e t h e f o r c e
r e q u i r e d t o t u r n t h e w h e e l w i t h t h e
s p e e d s e n s o r h o s e p l u g g e d a n d t h e
c a r p a r k e d ( s e e p a g e 1 7 7 9 ) .
Check the pump flow control valve
Ior internal leaking, and clean or
replace 6s necessary {see page
17-98). lf the valve is OK, replace
the pumP.
Steering effort above 30 N (3.0 kg,
6.6 lbs)- Check the pressure con'
trol valve for sticking or a clogged
orifice; clean or replace the valve
as necessary (see page 17'107). lf
the pressure control valve is OK,
check the pinion pin for free move_
ment. lf seized or binding overhaul
the steering gearbox,
Steering effon below 30 N (3.o kg,
6.6 lbs). The power steering speed
sensor is leaking internallyi replace
the power steering speed s€nsor
( s e e p a g e 1 7 B 0 ) .
( c o n t ' d
1 7 - 2 5