Mitsubishi 3000GT 1994 Workshop Manual page 1013

HEATER, AIR CONDITIONER AND VENTILATION -
Compressor
55-49
REVOLUTION PICK UP SENSOR
CHECK
Measure
the
resistance between terminals
@
and
@ of
the
connector.
Normal resistance: 405
+
35 O
when ambient temperature
is
20'C
(68.F)
lf
the measurement deviates greatly from the
above
resis-
tance, replace
the
revolution
pick up
sensor assembly.
CONTROT VALVE
CHECK
The control valve detects
a
low pressure level during the
operation
of the
air conditioner, and adjusts
the
amount of
refrigerant
to
be
bypassed.
(1)
Operate
the air conditioner under a high temperature load
condition (when vehicle interior temperature is
high).
(2) Connect a
low pressure gauge
to the
air
compressor.
(3)
Operate the air conditioner
with the engine
running at idle.
(4)
Gradually increase
the
engine speed
while
observing the
low
pressure gauge.
lf the valve is normal,
the low
pressure drops slowly as the
enqine speed increases until a pressure
of
180^kPa
{1
.8 kg/
cm2, 25
ös
i
)
:
R-1
2:
1
50-200
kPa
( 1
.*2.0
kg/cm2,
2f30
psi)
:
R-134a
is reached, at which point the pressure temporarily
ceases to drop. Then, the pressure again starts dropping as
the engine speed further increases.
lf
the valve
is
abnormal, the low pressure drops
in
direct pro-
portion to the increase
in
engine speed without
a
temporarily
leveling
off at the
180 kPq (1.8 kg/cmz,25 psi):
R-12;
150-200
kPa (1
.V2.0
kg/cm2,20-30-psi):
R-134a pressure
level. lf
the low pressure drops like this, replace the control
valve.
SERVICE POINTS OF
REASSEMBLY
t'.'
l
8.
INSTALLATION OF CTUTCH COIL
Align the pin of the clutch coilwith the pin hole
in
the front
housing, and
then
fit it
into the
hole.
7.
INSTALLANON OF SNAP
RING
Install
the
snap ring so that the tapered surface is at the
outer
side.
Clutch coil
Snqp-ring
Crankshaft
@
Mtbublshl Motoru
Corporatlon
July
1993
Abnormal \
\
\
:
o
c'
pA
(!
I
-v
o
J
o
o
o
3
J
\
\
\
-a\
-rt
\
<Vehicles using R-12
refrigerant>
180
(1.8, 25)
<Vehicles using
R-1
34a
refrigerant>
1
50-200 (1.5-2.0, 20-30)
Engine speed r/min
PWUE91tg-B
mntED