hose DODGE NEON 2000 Service Repair Manual

POSSIBLE LOCATIONS OR CAUSE OF
OBSTRUCTED COOLANT FLOW
(1) Pinched or kinked heater hoses.
(2) Improper heater hose routing.
(3) Plugged heater hoses or supply and return
ports at cooling system connections, refer to Group 7,
Cooling System.
(4) Plugged heater core.
(5) Air locked heater core.
(6) If coolant flow is verified and outlet tempera-
ture is insufficient, a mechanical problem may exist.
POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT
HEAT
(1) Obstructed cowl air intake.
(2) Obstructed heater system outlets.
(3) Blend-air door not functioning properly.
TEMPERATURE CONTROL
If temperature cannot be adjusted with the TEMP
lever on the control panel, the following could require
service:
(1) Blend-air door binding.
(2) Faulty blend-air door cable.
(3) Improper engine coolant temperature.
(4) Faulty Instrument Panel Control.
LOW PRESSURE CUT OFF SWITCH
The work area must not be below 21ÉC (70ÉF) to
test the compressor clutch circuit.
(1) With gear selector in park or neutral and park
brake set, start engine and allow to idle.
(2) Raise hood and disconnect low pressure cut off
switch connector boot.
(3) Using a suitable jumper wire, jump across the
terminals inside wire connector boot.
(4) If the compressor clutch does not engage, the
cycling clutch switch, wiring, relay, or fuse can be
defective. Refer to Group 8W, Wiring Diagrams.
(5) If clutch engages, connect manifold gauge set.
Read low pressure gauge. At pressure above 97 kPa
(14 psi) and above, low pressure out off switch will
complete the clutch circuit. If the low pressure gauge
reads below 140 kPa (20 psi), the system is low on
refrigerant charge or empty due to a leak. Refer to
Service Procedures, System Leak Checking in this
section.
(6) Install connector boot on switch and repeat
Step 3. If the clutch does not engage, replace the low
pressure cut off switch.
SYSTEM CHARGE LEVEL TEST
The procedure below should be used to check
and/or fill the refrigerant charge in the air condition-
ing system.
WARNING: AVOID BREATHING A/C REFRIGERANT
AND LUBRICANT VAPOR OR MIST. EXPOSURE MAY
IRRITATE EYES, NOSE AND THROAT. USE ONLY
APPROVED SERVICE EQUIPMENT MEETING SAE
REQUIREMENTS TO DISCHARGE R-134a SYSTEM.
IF ACCIDENTAL SYSTEM DISCHARGE OCCURS,
VENTILATE WORK AREA BEFORE RESUMING SER-
VICE.
R-134a SERVICE EQUIPMENT OR VEHICLE A/C
SYSTEM SHOULD NOT BE PRESSURE TESTED OR
LEAK TESTED WITH COMPRESSED AIR. MIXTURE
OF AIR and R-134a CAN BE COMBUSTIBLE AT ELE-
VATED PRESSURES. THESE MIXTURES ARE
POTENTIALLY DANGEROUS AND MAY RESULT IN
FIRE OR EXPLOSION CAUSING INJURY OR PROP-
ERTY DAMAGE.
NOTE: The maximum amount of R-134a refrigerant
that the air conditioning system holds is 765 grams
(27 oz. or 1.69 lbs.)
It is recommended to use the gauges or reclaim/re-
cycle equipment.
(1) Use a manifold gauge and check the liquid line
pressure.
(2) Attach a clamp-on thermocouple (P. S. E.
66-324-0014 or 80PK-1A) or equivalent to the liquid
line near the filter/drier.
(3) The vehicle must be in the following modes:
²Automatic transaxle in park or manual tran-
saxle in neutral.
²Engine at idle
²A/C controls set to outside air
²Panel mode
²A/C ON full cool
²Blower motor ON high speed
²Vehicle windows closed
(4) Operate system for a couple of minutes to allow
the system to stabilize.
(5) Observe filter/drier pressure and Liquid line
temperature. Using the Charge Determination Chart
(Fig. 14) determine where the system is currently
operating. If the system is not in the proper range,
reclaim all the refrigerant and recharge per A/C
label.
24 - 14 HEATING AND AIR CONDITIONINGPL
DIAGNOSIS AND TESTING (Continued)

VACUUM CONTROL SYSTEM
Use an adjustable vacuum test set (Special Tool
C-3707-B) and a suitable vacuum pump to test the
heater-A/C vacuum control system. With a finger
placed over the end of the vacuum test hose probe
(Fig. 15), adjust the bleed valve on the test set gauge
to obtain a vacuum of exactly 27 kPa (8 in. Hg.).
Release and block the end of the probe several times
to verify that the vacuum reading returns to the
exact 27 kPa (8 in. Hg.) setting. Otherwise, a false
reading will be obtained during testing.
Fig. 14 Charge Determination Chart
Fig. 15 Adjust Vacuum Test Bleed Valve - Typical
1 ± VACUUM PUMP TOOL C-4289
2 ± VACUUM TEST SET C-3707
3 ± BLEED VALVE
4 ± PROBE
PLHEATING AND AIR CONDITIONING 24 - 15
DIAGNOSIS AND TESTING (Continued)

HEATER-A/C VACUUM SYSTEM DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO FORCED AIR IN
HEAT POSITION1. Vacuum line pinched or
leaking.
2. Faulty heat defroster or
mode door.
3. Faulty selector switch.
4. Vacuum check valve.1. Locate and repair vacuum leak or pinched line.
2. Test actuators and door operation. Repair as
necassary.
3. Test selector switch and replace if necessary.
4. Test check valve and replace if necessary.
NO FORCED AIR IN
PANEL POSITION1. Vacuum line pinched or
leaking.
2. Faulty mode door.
3. Faulty selector switch.
4. Vacuum check valve.1. Locate and repair vacuum leak or pinched line.
2. Test actuator and door operation. Repair as
necessary.
3. Test selector switch and replace if necessary.
4. Test check valve and replace if necessary.
NO FORCED AIR IN
DEFROST POSITION1. Vacuum line pinched or
leaking.
2. Faulty heat, defroster, or
mode door.
3. Faulty selector switch.
4. Vacuum check valve.1. Locate and repair vacuum leak or pinched line.
2. Test actuators and door operation. Repair as
necessary.
3. Test selector switch and replace if necessary.
4. Test check valve and replace if necessary.
ONE-WAY CHECK VALVE
(1) Disconnect the heater-A/C vacuum supply
(Black) tube in the engine compartment. This tube
passes through an opening in the dash panel.
(2) Remove the one-way vacuum check valve. The
valve is located on the (Black) vacuum supply hose at
the brake power booster.
(3) Connect the test set vacuum supply hose to the
heater side of the valve. When connected to this side
of the check valve, no vacuum should pass and the
test set gauge should return to the 27 kPa (8 in. Hg.)
setting. If OK, go to step Step 4. If not OK, replace
the faulty valve.
(4) Connect the test set vacuum supply hose to the
engine vacuum side of the valve. When connected to
this side of the check valve, vacuum should flow
through the valve without restriction. If not OK,
replace the faulty valve.
HEATER-A/C CONTROLS
The operation of the Circulation door can be
viewed by removing the blower motor and looking up
into the unit inlet. See Blower Motor Wheel and
Assembly removal and installation in this section for
service procedures.
(1) Connect the test set vacuum probe to the heat-
er-A/C vacuum supply (Black) hose in the engine
compartment. Position the test set gauge so that it
can be viewed from the passenger compartment.
(2) Start with the Mode control in the Panel posi-
tion and the Circulation control in the Outside-air
position.
(3) Move the Circulation control to the Recircula-
tion position (the Circulation door should move intothe Recirculation position). After a short pause move
the Mode control to the Defrost position (the Circula-
tion door should move to the Outside-air position).
The test gauge should return to the calibrated set-
ting of 27 kPa (8 in. Hg.) after each selection is
made. If the gauge cannot achieve the calibrated set-
ting, the vacuum circuit or a component has a leak.
(4) If the gauge achieves the calibrated setting but
the door does not move, there is either a pinched vac-
uum line or a failed actuator.
LOCATING VACUUM LEAKS
(1) Connect the test vacuum probe to the vehicles
(Black) supply hose. Position the vacuum test gauge
so it can be viewed from the passenger compartment.
(2) Place the Mode in the Panel position and the
Circulation control in the Recirculation position.
(3) Remove the center instrument panel bezel.
(4) Remove the center vent duct.
(5) Remove and block the Supply (Black) vacuum
line at the control. The test gauge should return to
the calibrated setting of 27 kPa (8 in. Hg). If not,
there is a leak in the Supply line.
(6) If there is no leak in the Supply line, reconnect
it to the Control and remove the Actuator Feed (Red)
line from the Control. Block the vacuum connection
on the Control from where the line was removed. The
test gauge should return to the calibrated setting of
27 kPa (8 in. Hg.). If not, there is a leak in the Con-
trol.
(7) If there is no leak in the Supply line or the
Control, reconnect the Actuator Feed (Red) line to the
control. Remove and block the Actuator Feed (Red)
line at the Actuator. The actuator vacuum port is
accessible behind and above the Glove Box. The test
24 - 16 HEATING AND AIR CONDITIONINGPL
DIAGNOSIS AND TESTING (Continued)

gauge should return to the calibrated setting of 27
kPa (8 in. Hg.). If not there is a leak in the Actuator
Feed line.
(8) If there is no leak in the Supply line, Control,
or the Actuator Feed line, the leak must be in the
Actuator itself. Connect the Vacuum hose from the
Vacuum Test Gauge directly to the Actuator to verify
the leak.
LOCATING PINCHED VACUUM LINES
The operation of the Circulation door can be
viewed by removing the blower motor and looking up
into the unit inlet. See Blower Motor Wheel and
Assembly removal and installation in this section for
service procedures.
(1) Connect the test vacuum probe to the vehicles
(Black) supply hose. Position the vacuum test gauge
so it can be viewed from the passenger compartment.
(2) Place the Mode in the Panel position and the
Circulation control in the Recirculation position.
(3) Remove the center instrument panel bezel.
(4) Remove the center vent duct.
(5) Remove the Supply (Black) vacuum line at the
control. The test gauge should drop indicating free
flow through the Supply line. If not, there is a block-
age in the Supply line.
(6) If there is no blockage in the Supply line,
reconnect it to the Control. Remove the Actuator
Feed (Red) line from the Control. The test gauge
should drop indicating free flow through the Supply
line and Control. If not the vacuum switches on the
Control are not functioning.
(7) If there is no blockage in the Supply line or the
Control, reconnect the Actuator Feed (Red) line to the
control. Remove the Actuator Feed (Red) line at the
Actuator. The Actuator vacuum port is accessible
behind and above the Glove Box. The test gauge
should drop indicating free flow through the supply
line, Control, and the Actuator Feed line. If not,
there is a blockage in the Actuator Feed line.
(8) If there is no blockage in the Supply line, Con-
trol, or the Actuator Feed line, the Actuator must
have failed. Connect the Vacuum hose from the Vac-
uum Test Gauge directly to the Actuator to verify the
Actuator has failed.
SERVICE PROCEDURES
CHARGING A/C SYSTEM
PARTIAL CHARGE
This vehicle does not have a sight glass. It is not
possible to determine the amount of (R-134a) charge
in the system. Therefore it is necessary to completely
evacuate and recover the system, and then recharge
the system fully.
EVACUATION
Before adding refrigerant, all air must be evacu-
ated from the system.
²Connect a manifold gauge set to the A/C service
ports (Fig. 16).
²Use a vacuum pump or charging station and
evacuate system to 95 kPa (28 inches Hg) for 30 min-
utes.
²Go to Charging A/C System below.
CHARGING A/C SYSTEM
The procedure below should be used to fill the
refrigerant charge in the air conditioning system.
This A/C system does not have or use a sight glass to
check or charge the system.
WARNING: REVIEW SAFETY PRECAUTIONS AND
WARNINGS IN THIS GROUP BEFORE CHARGING
THE REFRIGERANT SYSTEM.
AVOID BREATHING A/C REFRIGERANT AND
LUBRICANT VAPOR OR MIST. EXPOSURE MAY
IRRITATE EYES, NOSE AND THROAT. USE ONLY
APPROVED SERVICE EQUIPMENT MEETING SAE
REQUIREMENTS TO DISCHARGE R-134a SYSTEM.
IF ACCIDENTAL SYSTEM DISCHARGE OCCURS,
VENTILATE WORK AREA BEFORE RESUMING SER-
VICE.
R-134a SERVICE EQUIPMENT OR VEHICLE A/C
SYSTEM SHOULD NOT BE PRESSURE TESTED OR
LEAK TESTED WITH COMPRESSED AIR. MIXTURE
OF AIR and R-134a CAN BE COMBUSTIBLE AT ELE-
VATED PRESSURES. THESE MIXTURES ARE
POTENTIALLY DANGEROUS AND MAY RESULT IN
FIRE OR EXPLOSION CAUSING INJURY OR PROP-
ERTY DAMAGE.
Fig. 16 A/C Service Ports
1 ± A/C SERVICE PORTS
2 ± FILTER/DRIER
PLHEATING AND AIR CONDITIONING 24 - 17
DIAGNOSIS AND TESTING (Continued)

Then allow the system to evacuate an additional 10
minutes.
(3) Close all valves. Turn off and disconnect the
vacuum pump.
(4) The refrigerant system is prepared to be
charged with refrigerant.
R-134a REFRIGERANT
This vehicle uses a refrigerant called R-134a. It is
a non-toxic, non-flammable, clear colorless liquefied
gas.
R-134a refrigerant is not compatible with R-12
refrigerant in an air conditioning system. Even a
small amount of R-12 in a R-134a system could cause
compressor failure, refrigerant oil to sludge and/or
poor performance.Never add any other type of
refrigerant to a system designed to use R-134a
refrigerant. System failure will occur.
The high pressure service port is located on the
ffilter/drier. The low pressure service port is located
on the suction line near the strut tower.
When servicing a system, it is required that an air
conditioning charging recovery/recycling machine be
used (Fig. 18). Contact an automotive service equip-
ment supplier for proper equipment. Refer to the
operating instructions provided with the equipment
for proper operation.
A manifold gauge set (Fig. 19) must also be used in
conjunction with the charging and/or recovery/recy-
cling device. Only use gauges that have not been
used for R-12. The service hoses on the gauge set
should have manual (turn wheel) or automatic back
flow valves at the service port connector ends. This
will prevent refrigerant R-134a from being released
into the atmosphere.R-134a refrigerant requires a special type of com-
pressor oil. When adding oil, make sure to use the oil
that is specified on the under hood label.
The use of R-134a will have a positive environmen-
tal impact due to it's zero ozone depletion and low
global warming impact.
SERVICING REFRIGERANT OIL LEVEL
CAUTION: The refrigerant oil used in a R-134a A/C
system is unique. Use only oils which were
designed to work with R-134a refrigerant. The oil
designated for this vehicle is ND8 PAG (polyalka-
lene glycol).
Recovery/recycling equipment will measure the
lubricant being removed. This is the amount of lubri-
cant to be added back to the system. If a new com-
pressor is being installed, drain lubricant from old
compressor, measure the amount drained and discard
old lubricant. Drain the lubricant from the new com-
pressor into a clean container. Return the amount of
lubricant measured from the old compressor, plus the
amount reclaimed from the system back into the new
compressor.
Fig. 18 Refrigerant Recovery/Recycling Station -
Typical
1 ± R-134 REFRIGERANT RECOVERY MACHINE
Fig. 19 Manifold Gauge Set - Typical
1 ± LOW PRESSURE GAUGE
2 ± HIGH PRESSURE GAUGE
3 ± VALVE
4 ± VACUUM/REFRIGERANT HOSE (YELLOW W/BLACK STRIP)
5 ± HIGH PRESSURE HOSE (RED W/BLACK STRIP)
6 ± LOW PRESSURE HOSE (BLUE W/BLACK STRIP)
7 ± VALVE
PLHEATING AND AIR CONDITIONING 24 - 19
SERVICE PROCEDURES (Continued)

REMOVAL
(1) Remove the wire connector from the low pres-
sure cut-off switch.
(2) Remove the center bolt of refrigerant line
plumbing sealing plate (Fig. 37).
(3) Carefully pull the refrigerant line-sealing plate
assembly from the expansion valve towards front of
vehicle. Do not scratch the expansion valve sealing
surfaces with pilot tubes.
(4) Cover the openings on A/C line-sealing plate
assembly to prevent contamination.
(5) Remove two screws securing the expansion
valve to the evaporator sealing plate.
(6) Carefully remove valve.
INSTALLATION
(1) Remove and replace the aluminum gasket on
the evaporator sealing plate.
(2) Carefully hold the expansion valve to the evap-
orator sealing plate so not to scratch the sealing sur-
face. Install two screws and tighten to 1163 N´m
(100630 in. lbs.).
(3) Remove and replace the aluminum gasket on
the refrigerant line- sealing plate assembly.
(4) Carefully hold the refrigerant line-sealing plate
assembly to the expansion valve. Install bolt and
tighten to 2363 N´m (200630 in. lbs.).
(5) Connect wires to low pressure cut-off switch.
(6) Evacuate and recharge system.
(7) After expansion valve is installed, system is
charged, and leaks have been checked, repeat A/C
performance check.
HEATER CORE
Refer to HVAC Housing Disassembly and Assembly
in this section for heater core removal procedure.
HEATER HOSES
CAUTION: When removing hoses from heater core
inlet or outlet nipples DO NOT exert excess pres-
sure. The heater core may become damaged and
leak engine coolant.
NOTE: Review Cooling System Precautions before
proceeding with this operation.
REMOVAL
(1) Drain engine cooling system. Refer to Group 7,
Cooling System.
(2) Using spring tension clamp pliers, remove
clamps at end of heater hose to be removed (Fig. 38).
(3) Carefully rotate hose back and forth while pull-
ing away from connector nipple.INSTALLATION
For installation, reverse the above procedures.
Fig. 37 Expansion Valve - Typical
1 ± ALUMINUM N-GASKET
2 ± PLUMBING SEALING PLATE
3 ± LOW/DIFFERENTIAL PRESSURE CUT-OFF SWITCH
4 ± DASH PANEL
5 ± H-VALVE
6 ± EVAPORATOR SEALING PLATE
7 ± H-VALVE
Fig. 38 Heater Hoses and Clamps
1 ± COWL PANEL
2 ± HEATER HOSE AND CLAMPS
3 ± HEATER CORE TUBES
4 ± HEATER HOSE SUPPLY AND RETURN TUBES
24 - 28 HEATING AND AIR CONDITIONINGPL
REMOVAL AND INSTALLATION (Continued)

(3) Remove line at expansion valve.
(4) Remove line at compressor (Fig. 46).
INSTALLATION
For installation, reverse the above procedures.
TEMPERATURE CONTROL CABLE
The Control Cable can be removed and installed
without having to remove the instrument panel from
the vehicle.
REMOVAL
(1) Remove instrument panel center stack bezel
(Fig. 41).
(2) Remove heater-A/C control head (Fig. 42).
(3) Remove center air duct.
(4) Disconnect cable at control panel. Remove con-
trol from instrument panel.
(5) Disconnect cable at heater unit (Fig. 47).
(6) Remove cable from vehicle.
INSTALLATION
For installation, reverse the above procedures,
adjust cable and test. See Temperature Control Cable
Adjustment in this section.
UNIT HOUSING
The instrument panel must be removed in order to
remove the Unit Housing. Refer to group 8E Instru-
ment Panel and Systems for detailed procedure.
WARNING: THE R-134a REFRIGERANT SYSTEM
MUST BE RECOVERED BEFORE SERVICING ANY
PART OF THE REFRIGERANT SYSTEM.
REMOVAL
(1) Using a refrigerant recovery machine, remove
the refrigerant from the A/C system, if equipped.
(2) Remove instrument panel from vehicle. Refer
to group 8E Instrument Panel and Systems for
detailed procedure.
(3) Drain cooling system and remove heater hoses
at the dash panel. Place plugs in the heater core out-
lets to prevent coolant spillage during unit housing
removal.
(4) Unfasten coolant recovery container and set
aside.
(5) Remove suction line at expansion valve. Cap
open refrigerant lines to prevent moisture and/or dirt
from entering.
Fig. 46 A/C Compressor Suction Line
1 ± FILTER DRIER
2 ± SERVICE PORTS
3 ± FILTER DRIER MOUNTING GROMMET
4 ± EVAPORATOR LINE BLOCK
5 ± EXPANSION VALVE
6 ± LOW PRESSURE CUT OUT SWITCH CONNECTOR
7 ± HVAC HOUSING DRAIN OUTLET
8 ± CONDENSATE DRAIN TUBE
9 ± EXPANSION VALVE SCREWS
10 ± CONDENSER LIQUID LINE
11 ± COMPRESSOR SUCTION LINE
Fig. 47 HVAC Housing Cables
1 ± VACUUM HARNESS
2 ± DOOR CAM
3 ± HVAC UPPER HOUSING
4 ± HVAC CONTROL HEADS CABLES
5 ± MODE DOOR LEVERS
6 ± DEFROSTER DUCT OUTLET
24 - 32 HEATING AND AIR CONDITIONINGPL
REMOVAL AND INSTALLATION (Continued)

(6) Remove expansion valve from evaporator, and
cap fittings.
(7) Remove rubber drain tube extension from con-
densation drain tube.
(8) Disconnect the vacuum harness at the power
brake booster (Fig. 48).
(9) Unsnap and remove the defroster duct (Fig.
49).(10) Remove three retaining nuts located in the
engine compartment, on the dash panel (Fig. 50).
(11) Remove the right side retaining screw (Fig.
51).
(12) Remove remaining nut located on dash panel
stud.
(13) Disconnect the wiring connectors.
(14) Remove assembly from the vehicle.
Fig. 48 HVAC Vacuum Harness
1 ± BRAKE POWER BOOSTER
2 ± A/C VACUUM CHECK VALVE
3 ± VACUUM HARNESS
Fig. 49 HVAC Housing Defroster Duct
1 ± DEFROSTER DUCT
2 ± BODY
3 ± ELECTRICAL CONNECTOR
4 ± HVAC HOUSING
Fig. 50 Dash Panel Retaining Studs
1 ± BLOWER RESISTOR
2 ± EXPANSION VALVE
3 ± DRAIN TUBE
4 ± DASH PANEL
5 ± HEATER HOSES
6 ± RETAINING STUDS
Fig. 51 Housing Screws
1 ± RIGHT SIDE RETAINING SCREW
2 ± EVAPORATOR PROBE GROMMET
3 ± SCREW BOSSES
4 ± DASH PANEL STUD AND NUT
PLHEATING AND AIR CONDITIONING 24 - 33
REMOVAL AND INSTALLATION (Continued)

HEATING AND AIR CONDITIONING
TABLE OF CONTENTS
page page
REMOVAL AND INSTALLATION
EVAPORATOR CORE ± R. H. D...............1
HEATER CORE ± R. H. D....................3SPECIFICATIONS
TORQUE SPECIFICATIONS..................6
REMOVAL AND INSTALLATION
EVAPORATOR CORE ± R. H. D.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M ± PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
WARNING: DO NOT OPEN THE RADIATOR DRAIN-
COCK OR DISCONNECT COOLANT HOSES WHEN
THE COOLING SYSTEM IS HOT AND UNDER PRES-
SURE. SERIOUS BURNS FROM COOLANT CAN
OCCUR.
WARNING: READ ALL SAFETY PRECAUTIONS AND
WARNINGS BEFORE PROCEEDING WITH THIS
OPERATION.
(1) Disconnect the negative battery cable.
(2) Drain the cooling system. Refer to Group 7,
Cooling System for the procedure.
(3) Evacuate the refrigerant system.
(4) Remove the instrument panel. Refer to Group
8E, Instrument Panel and Systems for the procedure.
(5) Remove the refrigerant line retaining bolt from
the expansion valve (Fig. 1). Remove the refrigerant
lines from the expansion valve.
(6) Disconnect the electrical connector from the
bottom of the expansion valve (Fig. 1).
(7) Remove the expansion valve retaining bolts
and remove the valve from the vehicle.
(8) Remove the heater core coolant supply hoses
from the heater core (Fig. 2).(9) Working from inside the engine compartment,
remove the A/C-Heater housing retaining fasteners
from the bulkhead.
(10) Remove the A/C-Heater housing drain tube.
Remove the spring clip and pull the hose from the
housing nipple.
(11) Working from inside the vehicle, remove the
defroster duct from the A/C-Heater housing and body
attachment point.
(12) Remove the A/C-Heater housing retaining
bolts.
(13) Disconnect the electrical connectors from the
A/C-Heater housing.
(14) Remove the A/C-Heater housing from the
vehicle and place the assembly on a bench.
Fig. 1 Refrigerant Lines at Bulkhead
1 ± EXPANSION VALVE
2 ± REFRIGERANT LINE MANIFOLD RETAINING BOLT
3 ± BATTERY
4 ± LOW PRESSURE CUTOUT SWITCH ELECTRICAL
CONNECTOR
PLHEATING AND AIR CONDITIONING 24 - 1

(7) Install the A/C-Heater housing retaining fas-
teners. Torque the fasteners to 20 N´m (177 in. lbs.).
(8) Install the heater core coolant supply hoses on
the heater core (Fig. 5).
(9) Install the expansion valve (Fig. 6), gasket and
retaining bolts. Torque the bolts to 11 N´m (97 in.
lbs.).
(10) Connect the electrical connector on the bottom
of the expansion valve (Fig. 6).
(11) Install the refrigerant lines and retaining bolt
(Fig. 6). Torque the bolt to 23 N´m (203 in. lbs.).
CAUTION: Be certain the refrigerant line sealing
O-rings are well lubricated and free of tears.
(12) Install the instrument panel. Refer to Group
8E, Instrument Panel and Systems for the procedure.
(13) Charge the refrigerant system.
(14) Fill the cooling system. Refer to Group 7,
Cooling System for the procedure.
(15) Connect the negative battery cable.
HEATER CORE ± R. H. D.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M ± PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, ORINSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
WARNING: DO NOT OPEN THE RADIATOR DRAIN-
COCK OR DISCONNECT COOLANT HOSES WHEN
THE SYSTEM IS HOT AND UNDER PRESSURE.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
(1) Disconnect the negative battery cable.
(2) Drain the cooling system. Refer to Group 7,
Cooling System for the procedure.
(3) Evacuate the refrigerant system.
(4) Remove the instrument panel. Refer to Group
8E, Instrument Panel and Systems for the procedure.
(5) Remove the refrigerant line retaining bolt from
the expansion valve (Fig. 7). Remove the refrigerant
lines from the expansion valve.
(6) Disconnect the electrical connector from the
bottom of the expansion valve (Fig. 7).
(7) Remove the expansion valve retaining bolts
and remove the valve from the vehicle.
Fig. 5 Heater Core Coolant Supply Lines
1 ± HEATER CORE COOLANT LINE SUPPORT BRACKETS
BOLTS
2 ± HEATER CORE COOLANT SUPPLY LINES
Fig. 6 Refrigerant Lines at Bulkhead
1 ± EXPANSION VALVE
2 ± REFRIGERANT LINE MANIFOLD RETAINING BOLT
3 ± BATTERY
4 ± LOW PRESSURE CUTOUT SWITCH ELECTRICAL
CONNECTOR
PLHEATING AND AIR CONDITIONING 24 - 3
REMOVAL AND INSTALLATION (Continued)