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Hydraulic Troubleshooting
YES
With engine at
slow idle, con-
nect a 24 VDC
power source
to solenoid
valve (5,
Figure 19-1).
Shutters should
NO 2. Install tee fit-
close.
tings (6, Figure 19-
4) in lines (8 & 9).
Connect pressure
gauges with a 0-
3500 kPa (0-500
psi) range to tee fit-
NO
tings. Disconnect
wire harness (5)
from solenoid
valve. There should
be 517 kPa (75 psi)
pressure in hose
(9), and NO pres-
sure in hose (8).
M19-8
YES
YES-3Connect 24
VDC power source
to solenoid valve.
YES
There should be
517 kPa (75 psi)
pressure in hose
(8), and NO pres-
sure in hose (9).
NO
YES
NO-4 Install hose
with tee fitting
between pressure
reducing valve (3)
and valve (4).
Connect pressure
NO
gauge with a 0-
3500 kPa (0-500
psi) range to tee fit-
ting. Pressure
should be 517 kPa
(75 psi).
NO
Radiator Shutters
NO CHANGES FROM
PREVIOUS STEP
YES
NO-5 Install hose with
tee fitting between pres-
sure reducing valve (2)
and pressure reducing
valve (3). Connect pres-
sure gauge with a 0-
35,000 kPa (0-5000 psi)
range to tee fitting. Pres-
sure should be 10,342
kPa (1,500 psi).
NO
Cause
Remedy
Go to
11 Electri-
electrical
cal prob-
trouble-
lem
shooting
11 Electri-
Go to
cal prob-
electrical
lem
trouble-
shooting
Solenoid
Replace
Valve (4)
solenoid
is defec-
valve (4)
tive
7 Solenoid
Replace
Valve (4)
solenoid
is defec-
valve (4)
tive
Pressure
Replace
reducing
pressure
valve (3)
reducing
is defec-
valve (3)
tive
Contin-
ued on
next page
M19003
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