Chrysler DODGE D150 1993 Service Manual page 1448

HEATING AND AIR CONDITIONING 24 -
TEMPERATURE IN TEST AREA 21-29° C (70-85° F)
VERIFY R-12 CHARGE-CONNECT MANIFOLD GAUGES
SEE MAINTENANCE AND ADJUSTMENTS SECTION
IF R-12 CHARGE IS LOW, CORRECT LEAK, EVACUATE,
AND CHARGE SYSTEM
BYPASS CYCLING CLUTCH SWITCH
USING JUMPER WIRE REFER TO
GROUP 8W, WIRING DIAGRAMS
START ENGINE ADJUST IDLE TO
1000 rpm IN PARK OR NEUTRAL
WITH PARK BRAKE SET
LOCATE AND REMOVE BOTH
VACUUM LINES AT RECIRC
DOOR ACTUATOR INSTALL
LT-GN LINE WHERE DK-GN
LINE HAD BEEN
CLOSE PASSENGER COMPARTMENT
SET CONTROL TO A/C, PANEL, HIGH
BLOWER, FULL HEAT
ENGINE
RPM
BLOWER
MOTOR
SPEED
I EVAPORATOR
I SUCTION GAUGE
I PSIG (kPag) 1
COMPRESSOR
DISCHARGE GAUGE
PSIG (kPag) 2
— m
POSSIBLE I
CAUSE I
20-35 PSIG
140-240 PSIG
1000 —
HI
(140 TO 240 kPag) (966 TO 1656 kPag) i —
NORMAL
C r
a
FREEZE
H-VALVE
15 INCHES
OF VACUUM
THAW
H-VALVE
38 PSIG (262 kPag)
OR MORE THEN
DROPS TO 25 TO 35
PSIG (172
TO 240 kPag)
RETURN RECIRC DOOR VACUUM LINES TO NORMAL
a
1000
HI
20 30 PSIG
(140 TO 207 kPag)
H240 PSIG OR HIGHER
(1656 kPag)
20-30 PSIG
(140-207 kPag)
140 PSIG (966 kPag)
OR LESS
H-VALVE
STUCK OPEN IF
CONDITIONS
CANNOT BE MET
H-VALVE
STUCK CLOSED IF
CONDITIONS
CANNOT BE MET
RESTRICTED
CONDENSER-
RESTRICTED
DISCHARGE LINE
-RADIATOR
OVERHEATING-
AIR IN SYSTEM-
OVERCHARGED
SYSTEM-COOLING
FAN INOP.
RECONNECT LOW PRESSURE/CYCLING SWITCH
AND RECONNECT THE VACUUM
LINES TO THE RECIRC/ACUATOR
DEFECTIVE
COMPRESSOR HEAD
GASKET OR
DISCHARGE REEDS
J 9 1 2 4 - 1 0 4
AIR CONDITIONING REFRIGERANT SYSTEM DIAGNOSIS