Jeep Cherokee 2000 Service Manual - page 1912
clutch relay, and the Powertrain Control Module
(PCM). The PCM may delay compressor clutch
engagement for up to thirty seconds. Refer to Group
14 - Fuel System for more information on the PCM
controls.
REMOVAL AND INSTALLATION
SUCTION AND DISCHARGE LINE
Any kinks or sharp bends in the refrigerant plumb-
ing will reduce the capacity of the entire air condi-
tioning system. Kinks and sharp bends reduce the
flow of refrigerant in the system. A good rule for the
flexible hose refrigerant lines is to keep the radius of
all bends at least ten times the diameter of the hose.
In addition, the flexible hose refrigerant lines should
be routed so they are at least 80 millimeters (3
inches) from the exhaust manifold.
High pressures are produced in the refrigerant sys-
tem when the air conditioning compressor is operat-
ing. Extreme care must be exercised to make sure
that each of the refrigerant system connections is
pressure-tight and leak free. It is a good practice to
inspect all flexible hose refrigerant lines at least once
a year to make sure they are in good condition and
properly routed.
WARNING: REVIEW THE WARNINGS AND CAU-
TIONS IN THE FRONT OF THIS GROUP BEFORE
PERFORMING THE FOLLOWING OPERATION.
LEFT-HAND DRIVE
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Recover the refrigerant from the refrigerant
system. See Refrigerant Recovery in this group for
the procedures.
(3) Unplug the wire harness connector from the
high pressure cut-off switch.
(4) Disconnect the discharge line refrigerant line
fitting from the condenser inlet tube (Fig. 2). See
Refrigerant Line Coupler in this group for the proce-
dures. Install plugs in, or tape over all of the opened
refrigerant line fittings.
(5) Remove the nut that secures the suction line
block fitting to the accumulator outlet. Install plugs
in, or tape over all of the opened refrigerant line fit-
tings.
(6) Remove the screw that secures the suction and
discharge line manifold to the compressor. Install
plugs in, or tape over all of the opened refrigerant
line fittings.
(7) Remove the suction and discharge line assem-
bly from the vehicle.
INSTALLATION
(1) Remove the tape or plugs from the suction and
discharge line manifold and the compressor. Install
the suction and discharge line manifold to the com-
pressor. Tighten the mounting screw to 28 N·m (250
in. lbs.).
(2) Remove the tape or plugs from the suction line
and the accumulator outlet block fittings. Install the
suction line to the accumulator outlet and tighten the
mounting nut to 9 N·m (80 in. lbs.).
(3) Remove the tape or plugs from the refrigerant
line fittings on the discharge line and the condenser
inlet tube. Connect the discharge line refrigerant line
coupler to the condenser inlet tube. See Refrigerant
Line Coupler in this group for the procedures.
(4) Plug in the wire harness connector to the high
pressure cut-off switch.
(5) Connect the battery negative cable.
Fig. 2 Suction and Discharge Line Remove/Install -
Left-Hand Drive
1 – SUCTION AND DISCHARGE LINE
2 – SCREW
3 – COMPRESSOR
4 – CONDENSER
5 – INLET
6 – CLIP
7 – HEX NUT
8 – ACCUMULATOR
24 - 4
HEATING AND AIR CONDITIONING
XJ
DESCRIPTION AND OPERATION (Continued)