YH4
GRAND
VITARA
1. P/S fluid reservoir
2. Gauge valve (shut)
3. Oil pressure gauge
4. P/S pump
5. P/S gear box
1. P/S fluid reservoir
2. Gauge valve (open)
3. Oil pressure gauge
4. P/S pump
5. P/S gear box
POWER STEERING (P/S) SYSTEM 3B1-11
5) Check relief pressure
Increase engine speed to about 1,500 r/min (rpm). Close
gauge valve gradually while watching pressure increase indi-
cated by gauge and take reading of relief pressure (maximum
hydraulic pressure).
Relief pressure:
6200 – 7000 kPa
(62 – 70 kg/cm
2
, 882 – 995 psi) G16 Type engine. . . . . . .
6700 – 7500 kPa
(67 – 75 kg/cm
2
, 953 – 1067 psi) J20 Type engine. . . . . . .
7050 – 7850 kPa
(70.5 – 78.5 kg/cm
2
, 1003 – 1116 psi) H25 Type engine. .
When it is higher than specified values, possible cause is mal-
function of relief valve.
When it is lower than specified values, possible cause is either
failure of P/S pump or settling of relief valve spring.
CAUTION:
Be sure not to close gauge valve for longer than 10 se-
conds.
Next, open gauge valve fully and increase engine speed to
about 1,500 r/min (rpm). Then turn steering wheel to the left
or right fully and take reading of relief pressure.
Relief pressure:
6200 – 7000 kPa
(62 – 70 kg/cm
2
, 882 – 995 psi) G16 Type engine. . . . . . .
6700 – 7500 kPa
(67 – 75 kg/cm
2
, 953 – 1067 psi) J20 Type engine. . . . . . .
7050 – 7850 kPa
(70.5 – 78.5 kg/cm
2
, 1003 – 1116 psi) H25 Type engine. .
When it is higher than specified values, possible cause is mal-
function of relief valve.
When it is lower than specified values, possible cause is failure
in steering gear box. Replace gear box.
CAUTION:
Be sure not to hold steering wheel at fully turned posi-
tion for longer than 10 seconds.
BOOT
STEERING RACK BOOT CHECK
Check boot for crack and damage which, if any, means possibility
of rusty gear, entry of dust or lack of grease. Also, check if any of
such faulty conditions exists.
Check steering rack boot for dent or breakage.
If there is a dent, keep boot in most compressed state for some se-
conds to correct dent.
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