2002 CHRYSLER CARAVAN battery

HVAC HOUSING
REMOVAL
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING),
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING),
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - HEATER PLUMB-
ING).
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Recover the refrigerant from the refrigerant
system. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/REFRIGERANT -
STANDARD PROCEDURE - REFRIGERANT
RECOVERY).
(2) Drain the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOLING
SYSTEM DRAIN).
(3) Disconnect and isolate the battery negative
cable.
(4) Disconnect the liquid line and suction line from
the expansion valve. (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - FRONT/LIQUID
LINE - REMOVAL) and (Refer to 24 - HEATING &
AIR CONDITIONING/PLUMBING - FRONT/SUC-
TION LINE - REMOVAL).
(5) Disconnect the heater hoses from the heater
core tubes. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/HEATER HOSE -
REMOVAL).
(6) Remove the four nuts that secure the heater-
A/C unit housing studs to the engine compartment
side of the dash panel (Fig. 13).
(7) Remove the instrument panel from the passen-
ger compartment. (Refer to 23 - BODY/INSTRU-MENT PANEL/INSTRUMENT PANEL ASSEMBLY -
REMOVAL).
(8) Remove the floor distribution duct from the
heater-A/C unit housing. (Refer to 24 - HEATING &
AIR CONDITIONING/DISTRIBUTION - FRONT/
FLOOR DISTRIBUTION DUCTS - REMOVAL).
(9) Remove the one screw that secures the heater-
A/C unit housing bracket to the passenger compart-
ment side of the dash panel (Fig. 14).
Fig. 13 Heater-A/C Unit Housing Studs
1 - HEATER-A/C UNIT HOUSING
2 - DASH PANEL
3 - NUT (4)
4 - STUD (4)
Fig. 14 Heater-A/C Unit Housing
1 - HEATER-A/C UNIT HOUSING
2 - SCREW
3 - BRACKET
4 - DASH PANEL
RSDISTRIBUTION - FRONT24-49
ProCarManuals.com

(10) Pull the heater-A/C unit housing rearward far
enough for the mounting studs to clear the dash
panel and remove the unit from the passenger com-
partment.
INSTALLATION
(1) Position the heater-A/C unit housing against
the dash panel in the passenger compartment with
the four mounting studs located in their proper
mounting holes in the dash panel.
(2) Install and tighten the one screw that secures
the heater-A/C unit housing bracket to the passenger
compartment side of the dash panel. Tighten the
screw to 3 N´m (26 in. lbs.).
(3) Install and tighten the four nuts that secure
the heater-A/C unit housing studs to the engine com-
partment side of the dash panel. Tighten the nuts to
7 N´m (62 in. lbs.).
(4) Reinstall the floor distribution duct onto the
heater-A/C unit housing. (Refer to 24 - HEATING &
AIR CONDITIONING/DISTRIBUTION - FRONT/
FLOOR DISTRIBUTION DUCTS - INSTALLATION).
(5) Reinstall the instrument panel into the passen-
ger compartment. (Refer to 23 - BODY/INSTRU-
MENT PANEL/INSTRUMENT PANEL ASSEMBLY -
INSTALLATION).
(6) Reconnect the heater hoses to the heater core
tubes. (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING - FRONT/HEATER HOSE -
INSTALLATION).
(7) Reconnect the suction line and liquid line to
the expansion valve. (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - FRONT/SUCTION
LINE - INSTALLATION) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - FRONT/
LIQUID LINE - INSTALLATION).
(8) Reconnect the battery negative cable.
(9) Refill the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOLING
SYSTEM REFILL).
(10) Evacuate the refrigerant system. (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM EVACUATE).
(11) Charge the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM CHARGE).
PANEL DUCTS
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument panel from the vehicle.
(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL ASSEMBLY - REMOVAL).
(3) Place the instrument panel face down on a
suitable work surface. Be certain to take the proper
precautions to protect the face of the instrument
panel from cosmetic damage.
(4) Remove the fasteners that secure the panel
ducts to the instrument panel armature.
(5) Disengage the panel ducts from the panel out-
lets.
(6) Remove the panel ducts from the instrument
panel.
INSTALLATION
(1) Position the panel ducts to the instrument
panel.
(2) Engage the panel ducts to the panel outlets.
(3) Install the fasteners that secure the panel
ducts to the instrument panel armature.
(4) Reinstall the instrument panel into the vehicle.
(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL ASSEMBLY - INSTALLA-
TION).
(5) Reconnect the battery negative cable.
24 - 50 DISTRIBUTION - FRONTRS
HVAC HOUSING (Continued)
ProCarManuals.com

system control switch on the front heater-A/C control
is not in the Off position. The blower motor can only
be turned off by turning off the rear system at the
front heater-A/C control. The blower motor receives
battery current whenever the rear blower motor
relay is energized. The rear blower motor relay out-
put circuit is protected by a fuse in the Intelligent
Power Module (IPM) located in the engine compart-
ment near the battery. In the MTC system, the
blower motor speed is controlled by regulating the
path to ground through the blower control switch and
the blower motor resistor. In the ATC system, the
blower motor speed is controlled by an electronic
blower power module, which uses a pulse width mod-
ulated input from the ATC module and feedback from
the blower motor to regulate the blower motor
ground path it provides. The blower motor and wheel
are used to control the velocity of air moving through
the rear heater-A/C unit housing. The blower motor
controls the velocity of the air flowing through the
rear heater-A/C housing by spinning the blower
wheel within the housing at the selected speed or, in
the ATC system, at the selected or programmed
speed.
DIAGNOSIS AND TESTING - BLOWER MOTOR
BLOWER MOTOR INOPERATIVE
(1) Check the fuse (Fuse 12 - 25 ampere) in the
Intelligent Power Module (IPM). If OK, go to Step 2.
If not OK, repair the shorted circuit or component as
required and replace the faulty fuse.
(2) Turn the ignition switch to the On position. Be
certain that the rear heater-A/C control power is
turned on. Check for battery voltage at the fuse
(Fuse 12 - 25 ampere) in the IPM. If OK, go to Step
3. If not OK, proceed to diagnosis of the rear blower
motor relay. (Refer to 24 - HEATING & AIR CONDI-
TIONING/CONTROLS - REAR/BLOWER MOTOR
RELAY - DIAGNOSIS AND TESTING).
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the rear HVAC wire harness connector for
the rear blower motor resistor (Manual Temperature
Control) or the rear blower power module (Automatic
Temperature Control) from the resistor or module
connector receptacle. Reconnect the battery negative
cable. Turn the ignition switch to the On position. Be
certain that the rear heater-A/C control power is
turned on. Check for battery voltage at the fused
rear blower motor relay output circuit cavity of the
rear HVAC wire harness connector for the rear
blower motor resistor (MTC) or the rear blower
power module (ATC). If OK, go to Step 4. If not OK,
repair the open fused front blower motor relay output
circuit to the IPM as required.(4) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the rear blower motor pigtail wire connec-
tor from the take out and connector of the rear
HVAC wire harness (MTC) or the connector recepta-
cle of the rear blower power module (ATC). Use
jumper wires to connect a battery and ground feeds
to the blower motor pigtail wire connector. The
blower motor should operate. If OK with MTC, pro-
ceed to diagnosis of the rear blower motor resistor.
(Refer to 24 - HEATING & AIR CONDITIONING/
CONTROLS - REAR/BLOWER MOTOR RESISTOR -
DIAGNOSIS AND TESTING). If OK with ATC, use a
DRBIII scan tool to diagnose the rear blower power
module. Refer to the appropriate diagnostic informa-
tion. If not OK with MTC or ATC, replace the faulty
rear blower motor.
BLOWER MOTOR NOISE OR VIBRATION
Refer to the Blower Motor Noise/Vibration Diagno-
sis chart (Fig. 4).
REMOVAL
The rear blower motor and blower wheel are ser-
viced only as a balanced unit. If either component is
faulty or damaged, the entire unit must be replaced.
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING),
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING),
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - HEATER PLUMB-
ING).
(1) Remove the rear heater-A/C unit housing from
the vehicle. (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/REAR HEATER-
A/C HOUSING - REMOVAL).
(2) Disconnect the rear blower motor pigtail wire
connector. With manual temperature control, the
blower pigtail wire is connected to a take out and
connector of the rear HVAC wire harness. With auto-
matic temperature control, the blower pigtail wire is
connected to a receptacle on the blower power mod-
ule.
(3) Remove the three screws that secure the
blower motor to the outboard side of the rear heater-
A/C unit housing (Fig. 5).
(4) Remove the blower motor and blower wheel
from the rear heater-A/C unit housing.
RSDISTRIBUTION - REAR24-53
BLOWER MOTOR (Continued)
ProCarManuals.com

INSTALLATION
(1) Position the blower motor and blower wheel
onto the outboard side of the rear heater-A/C unit
housing.
(2) Install and tighten the three screws that secure
the blower motor to the rear heater-A/C unit housing.
Tighten the screws to 2 N´m (18 in. lbs.).
(3) Reconnect the rear blower motor pigtail wire
connector. With manual temperature control, the
blower pigtail wire is connected to a take out and
connector of the rear HVAC wire harness. With auto-
matic temperature control, the blower pigtail wire is
connected to a receptacle on the blower power mod-
ule.
(4) Reinstall the rear heater-A/C unit housing into
the vehicle. (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/REAR HEATER-
A/C HOUSING - INSTALLATION).
REAR HEATER-A/C HOUSING
REMOVAL
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING),
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING),
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - HEATER PLUMB-
ING).
(1) Recover the refrigerant from the refrigerant
system. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/REFRIGERANT -
STANDARD PROCEDURE - REFRIGERANT
RECOVERY).
(2) Drain the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOLING
SYSTEM DRAIN).
(3) Disconnect and isolate the battery negative
cable.
(4) Raise and support the vehicle.
(5) Disconnect the underbody refrigerant line seal-
ing plate from the rear heater-A/C unit evaporator
extension line sealing plate that extends through the
rear floor panel behind the right rear wheel housing
(Fig. 6).
(6) Remove the seals from the liquid line and suc-
tion line fittings and discard.
(7) Install plugs in, or tape over the opened liquid
line and suction line fittings and both ports in the
evaporator extension line sealing plate.
Fig. 5 Blower Motor
1 - REAR HEATER-A/C UNIT HOUSING
2 - BLOWER MOTOR
3 - SCREW (3)
4 - BLOWER PIGTAIL WIRE
Fig. 6 Refrigerant Lines
1 - UNDERBODY REFRIGERANT LINE SEALING PLATE
RSDISTRIBUTION - REAR24-55
BLOWER MOTOR (Continued)
ProCarManuals.com

(8) Install and tighten the two screws that secure
the bottom of the quarter trim panel attaching
bracket to the rear heater-A/C unit housing. Tighten
the screws to 1.7 N´m (15 in. lbs.).
(9) Install and tighten the two screws that secure
the top of the quarter trim panel attaching bracket to
the quarter inner panel.
(10) Reconnect the body wire harness connector for
the rear heater-A/C unit housing to the rear HVAC
wire harness connector located near the expansion
valve at the back of the unit.
(11) Reinstall the auxiliary A/C distribution duct
onto the rear heater-A/C unit and the rear roof duct.
(Refer to 24 - HEATING & AIR CONDITIONING/
DISTRIBUTION - REAR/AUXILIARY A/C DISTRI-
BUTION DUCT - INSTALLATION).
(12) Reinstall the right quarter trim panel and
right D-pillar trim panel onto the quarter inner
panel. (Refer to 23 - BODY/INTERIOR/QUARTER
TRIM PANEL - INSTALLATION).
(13) Raise and support the vehicle.(14) Install and tighten the three nuts that secure
the rear heater-A/C unit mounting studs to the rear
floor panel behind the right rear wheel housing.
Tighten the nuts to 9 N´m (80 in. lbs.).
(15) Remove the tape or plugs from the underbody
liquid line and suction line fittings and both ports in
the rear heater-A/C unit evaporator extension line
sealing plate that extends through the rear floor
panel behind the right rear wheel housing.
(16) Lubricate new rubber O-ring seals with clean
refrigerant oil and install them on the liquid line and
suction line fittings.
(17) Reconnect the underbody refrigerant line seal-
ing plate to the evaporator extension line sealing
plate.
(18) Install and tighten the screw that secures the
underbody refrigerant line sealing plate to the evap-
orator extension line sealing plate. Tighten the screw
to 23 N´m (17 ft. lbs.).
(19) Lower the vehicle.
(20) Reconnect the battery negative cable.
Fig. 8 Rear Heater-A/C Housing
1 - U-NUT (3)
2 - REAR HEATER-A/C HOUSING
3 - SCREW (3)
4 - EXPANSION VALVE5 - STUD (3)
6 - HEATER LINES
7 - NUT (5)
8 - STUD (2)
RSDISTRIBUTION - REAR24-57
REAR HEATER-A/C HOUSING (Continued)
ProCarManuals.com

(5) Inspect the drive belt for wear, damage, and
proper tension. (Refer to 7 - COOLING/ACCESSORY
DRIVE/DRIVE BELTS - DIAGNOSIS AND TEST-
ING).
REMOVAL
REMOVAL - COMPRESSOR
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING)
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING).
(1) Recover the refrigerant from the refrigerant
system. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/REFRIGERANT -
STANDARD PROCEDURE - REFRIGERANT
RECOVERY).
(2) Disconnect and isolate the battery negative
cable.
(3) Remove the nut that secures the suction line
fitting to the top of the compressor.
(4) Disconnect the suction line fitting from the
compressor suction port.
(5) Remove the seal from the suction line fitting
and discard.
(6) Install plugs in, or tape over the opened suc-
tion line fitting and the compressor suction port.
(7) Remove the nut that secures the discharge line
fitting to the top of the compressor.
(8) Disconnect the discharge line fitting from the
compressor discharge port.
(9) Remove the seal from the discharge line fitting
and discard.
(10) Install plugs in, or tape over the opened dis-
charge line fitting and the compressor discharge port.
(11) Raise and support the vehicle.
(12) Remove the serpentine accessory drive belt
from the front of the engine. (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - 2.4L -
REMOVAL) or (Refer to 7 - COOLING/ACCESSORY
DRIVE/DRIVE BELTS - 3.3L/3.8L - REMOVAL).
(13) Disconnect the engine wire harness connector
for the compressor clutch coil from the coil pigtail
wire connector on the top of the compressor (Fig. 1)
or (Fig. 2).
(14) On models with the 3.3L and 3.8L engines,
disengage the retainer on the engine wire harness
compressor clutch coil take out from the bracket on
the top of the compressor.(15) On models with the 2.4L engine, remove the
four screws that secure the compressor to the mount-
ing bracket on the engine.
(16) On models with the 3.3L and 3.8L engines,
remove the three screws and one nut that secure the
compressor to the engine.
Fig. 1 Compressor - 2.4L Engine
1 - CLUTCH COIL CONNECTOR
2 - DISCHARGE PORT
3 - COMPRESSOR
4 - SUCTION PORT
5 - SCREW (4)
6 - COMPRESSOR MOUNTING BRACKET
Fig. 2 Compressor - 3.3L/3.8L Engine
1 - STUD
2 - CLUTCH COIL CONNECTOR
3 - DISCHARGE PORT
4 - SCREW (2)
5 - SUCTION PORT
6 - COMPRESSOR
7 - SCREW
8 - NUT
RSPLUMBING - FRONT24-63
COMPRESSOR (Continued)
ProCarManuals.com

(17) Remove the compressor from the engine com-
partment.
NOTE: If a replacement compressor is being
installed, be certain to drain and measure the refrig-
erant oil contained in the removed compressor.
This will determine how much oil the replacement
compressor must contain before it is installed.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT/REFRIGERANT OIL - STAN-
DARD PROCEDURE - REFRIGERANT OIL LEVEL).
REMOVAL - COMPRESSOR MOUNTING
BRACKET - 2.4L ENGINE
(1) Remove the compressor from the mounting
bracket. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING/COMPRESSOR - REMOVAL).
(2) Remove the four screws that secure the com-
pressor mounting bracket to the engine (Fig. 3).
(3) Remove the compressor mounting bracket from
the engine.
INSTALLATION
INSTALLATION - COMPRESSOR
NOTE: If a replacement compressor is being
installed, be certain to check the refrigerant oil
level. (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT/REFRIGERANT OIL - STAN-
DARD PROCEDURE - REFRIGERANT OIL LEVEL).
Use only refrigerant oil of the type recommended
for the compressor in the vehicle.(1) Position the compressor into the engine com-
partment.
(2) On models with the 2.4L engine, loosely install
the four screws that secure the compressor to the
mounting bracket on the engine. Tighten the screws
to 28 N´m (21 ft. lbs.).
(3) On models with the 3.3L and 3.8L engines,
loosely install the three screws and one nut that
secure the compressor to the engine. Tighten each of
the fasteners using the following sequence to 54 N´m
(40 ft. lbs.).
²The upper screw at the rear of the compressor.
²The lower screw at the rear of the compressor.
²The lower screw at the front of the compressor.
²The upper nut at the front of the compressor.
(4) On models with the 3.3L and 3.8L engines only,
engage the retainer on the engine wire harness com-
pressor clutch coil take out with the bracket on the
top of the compressor.
(5) Reconnect the engine wire harness connector
for the compressor clutch coil to the coil pigtail wire
connector on the top of the compressor.
(6) Reinstall the serpentine accessory drive belt
onto the front of the engine. (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - 2.4L -
INSTALLATION) or (Refer to 7 - COOLING/ACCES-
SORY DRIVE/DRIVE BELTS - 3.3L/3.8L - INSTAL-
LATION).
(7) Lower the vehicle.
(8) Remove the tape or plugs from the compressor
discharge port and the discharge line fitting.
(9) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the discharge line fit-
ting.
(10) Reconnect the discharge line fitting to the
compressor discharge port.
(11) Install and tighten the nut that secures the
discharge line fitting to the compressor. Tighten the
nut to 23 N´m (17 ft. lbs.).
(12) Remove the tape or plugs from the compressor
suction port and the suction line fitting.
(13) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the suction line fit-
ting.
(14) Reconnect the suction line fitting to the com-
pressor suction port.
(15) Install and tighten the nut that secures the
suction line fitting to the compressor. Tighten the nut
to 23 N´m (17 ft. lbs.).
(16) Reconnect the battery negative cable.
(17) Evacuate the refrigerant system. (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM EVACUATE).
(18) Charge the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
Fig. 3 Compressor Mounting Bracket - 2.4L Engine
1 - MOUNTING BRACKET
2 - SCREWS (4)
3 - ENGINE
24 - 64 PLUMBING - FRONTRS
COMPRESSOR (Continued)
ProCarManuals.com

(2) Close all doors, windows and vents to the pas-
senger compartment.
(3) Set the heater-air conditioner controls so that
the compressor is operating, the temperature control
is in the highest temperature position, the mode door
is directing the output to the floor outlets, and the
blower is operating at the highest speed setting.
(4) Start the engine and allow it to idle at 1000
rpm. After the engine has reached normal operating
temperature, allow the passenger compartment to
heat up. This will create the need for maximum
refrigerant flow into the evaporator.
(5) If the refrigerant charge is sufficient, the dis-
charge (high pressure) gauge should read 965 to 1655
kPa (140 to 240 psi). The suction (low pressure)
gauge should read 140 kPa to 207 kPa (20 psi to 30
psi). If OK, go to Step 6. If not OK, replace the faulty
expansion valve.
WARNING:
PROTECT THE SKIN AND EYES FROM EXPOSURE
TO LIQUID CO. PERSONAL INJURY CAN RESULT.
(6) If the suction (low pressure) gauge reads
within the specified range, freeze the expansion valve
control head for 30 seconds using liquid CO or
another suitable super-cold material.Do not spray
R-134a or R-12 refrigerant on the expansion
valve control head for this test.The suction (low
pressure) gauge reading should drop by 10 psi. If OK,
go to Step 7 If not OK, replace the faulty expansion
valve.
(7) Allow the expansion valve control head to thaw.
The suction (low pressure) gauge reading should sta-
bilize at 140 kPa to 240 kPa (20 psi to 30 psi). If not
OK, replace the faulty expansion valve.
(8) When expansion valve testing is complete, test
the overall air conditioner performance. (Refer to 24 -
HEATING & AIR CONDITIONING - DIAGNOSIS
AND TESTING - A/C PERFORMANCE TEST).
Remove all test equipment before returning the vehi-
cle to service.
REMOVAL
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNING - A/C PLUMBING)
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTION - A/C PLUMBING).
(1) Recover the refrigerant from the refrigerant
system. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/REFRIGERANT -STANDARD PROCEDURE - REFRIGERANT
RECOVERY).
(2) Disconnect and isolate the battery negative
cable.
(3) Remove the air cleaner housing from the right
side of the engine compartment.
(4) Disconnect the drain tube from the wiper mod-
ule drain on the right side of the engine compart-
ment.
(5) Disconnect the headlamp and dash wire har-
ness connector for the A/C pressure transducer from
the transducer on the front liquid line rear section
(Fig. 14).
(6) Remove the screw that secures the front liquid
line rear section fitting to the top of the filter-drier.
(7) Disconnect the liquid line fitting from the fil-
ter-drier outlet port.
(8) Remove the seal from the liquid line fitting and
discard.
(9) Install plugs in, or tape over the opened liquid
line fitting and the filter-drier outlet port.
(10) Remove the nut that secures the suction line
and liquid line fittings to the stud on the expansion
valve.
(11) Disconnect the suction line and liquid line fit-
tings from the expansion valve and move the lines
out of the way.
(12) Remove the seals from the suction line and
liquid line fittings and discard.
(13) Install plugs in, or tape over the opened suc-
tion line and liquid line fittings and both expansion
valve ports.
Fig. 14 Expansion Valve
1 - A/C PRESSURE TRANSDUCER
2 - EVAPORATOR TEMPERATURE SENSOR
3 - EXPANSION VALVE
4 - SUCTION LINE
5 - HIGH SIDE SERVICE PORT
6 - FRONT LIQUID LINE REAR SECTION
24 - 72 PLUMBING - FRONTRS
EXPANSION VALVE (Continued)
ProCarManuals.com