1999 DODGE NEON window

STATIONARY GLASS
INDEX
page page
DESCRIPTION AND OPERATION
SAFETY PRECAUTIONS.................. 43
REMOVAL AND INSTALLATION
QUARTER GLASS....................... 45REAR WINDOW......................... 46
WINDSHIELD........................... 43
DESCRIPTION AND OPERATION
SAFETY PRECAUTIONS
WARNING: DO NOT OPERATE THE VEHICLE
WITHIN 24 HOURS OF WINDSHIELD INSTALLATION.
IT TAKES AT LEAST 24 HOURS FOR URETHANE
ADHESIVE TO CURE. IF IT IS NOT CURED, THE
WINDSHIELD MAY NOT PERFORM PROPERLY IN
AN ACCIDENT.
URETHANE ADHESIVES ARE APPLIED AS A SYS-
TEM. USE GLASS CLEANER, GLASS PREP SOL-
VENT, GLASS PRIMER, PVC (VINYL) PRIMER AND
PINCHWELD (FENCE) PRIMER PROVIDED BY THE
ADHESIVE MANUFACTURER. IF NOT, STRUCTURAL
INTEGRITY COULD BE COMPROMISED.
CHRYSLER DOES NOT RECOMMEND GLASS
ADHESIVE BY BRAND. TECHNICIANS SHOULD
REVIEW PRODUCT LABELS AND TECHNICAL DATA
SHEETS, AND USE ONLY ADHESIVES THAT THEIR
MANUFACTURES WARRANT WILL RESTORE A
VEHICLE TO THE REQUIREMENTS OF FMVSS 212.
TECHNICIANS SHOULD ALSO INSURE THAT PRIM-
ERS AND CLEANERS ARE COMPATIBLE WITH THE
PARTICULAR ADHESIVE USED.
BE SURE TO REFER TO THE URETHANE MANU-
FACTURER'S DIRECTIONS FOR CURING TIME
SPECIFICATIONS, AND DO NOT USE ADHESIVE
AFTER ITS EXPIRATION DATE.
VAPORS THAT ARE EMITTED FROM THE URE-
THANE ADHESIVE OR PRIMER COULD CAUSE
PERSONAL INJURY. USE THEM IN A WELL-VENTI-
LATED AREA.
SKIN CONTACT WITH URETHANE ADHESIVE
SHOULD BE AVOIDED. PERSONAL INJURY MAY
RESULT.
ALWAYS WEAR EYE AND HAND PROTECTION
WHEN WORKING WITH GLASS.CAUTION: Protect all painted and trimmed surfaces
from coming in contact with urethane or primers.
Be careful not to damage painted surfaces when
removing moldings or cutting urethane around
windshield.
It is difficult to salvage a windshield during the
removal operation. The windshield is part of the
structural support for the roof. The urethane bonding
used to secure the windshield to the fence is difficult
to cut or clean from any surface. If the moldings are
set in urethane, it would also be unlikely they could
be salvaged. Before removing the windshield, check
the availability of the windshield and moldings from
the parts supplier.
REMOVAL AND INSTALLATION
WINDSHIELD
The urethane adhesive holding the windshield to
the opening pinch weld (fence) can be cut using a
sharp cold knife from the exterior of the vehicle.
Using the cold knife method is effective if the wind-
shield is already broken. If the glass must be sal-
vaged, cutting the urethane adhesive from the
interior of the vehicle using a reciprocating or oscil-
lating power knife is recommended.
WINDSHIELD REMOVAL ± EXTERIOR METHOD
(1) Remove inside rear view mirror.
(2) Remove windshield wiper arms.
(3) Remove cowl cover.
(4) Place protective covers over instrument panel
and hood.
PLBODY 23 - 43

(3) Prime perimeter of quarter glass fence in quar-
ter panel opening with black-out primer.
(4) Prime perimeter of quarter glass with black-out
primer.
(5) Install a 5/16 bead of round butyl tape around
perimeter of quarter glass.
(6) Place quarter glass into opening in quarter
panel.
(7) Install nuts to hold quarter glass to quarter
panel opening.
(8) Install B-pillar applique.
(9) Install quarter trim panel.
REAR WINDOW
Refer to the windshield paragraph of this section
for a description of tools and adhesive systems that
are recommended for use in this procedure.
WARNING: DO NOT OPERATE THE VEHICLE
WITHIN 24 HOURS OF WINDSHIELD INSTALLATION.
IT TAKES AT LEAST 24 HOURS FOR URETHANE
ADHESIVE TO CURE. IF IT IS NOT CURED, THE
WINDSHIELD MAY NOT PERFORM PROPERLY IN
AN ACCIDENT. BE SURE TO REFER TO THE URE-
THANE MANUFACTURER'S DIRECTIONS FOR CUR-
ING TIME SPECIFICATIONS, AND DO NOT USE
ADHESIVE AFTER ITS EXPIRATION DATE.
CAUTION: Open the left front door glass before
installing the rear window to avoid pressurizing the
passenger compartment if a door is slammed
before the urethane bonding is fully cured. Water
leaks can result
REAR WINDOW REMOVAL
(1) Remove rear window moldings.
(2) Remove upper quarter trim panel.
(3) Disengage wire connectors from rear window
defogger.
WARNING: WEAR EYE AND HAND PROTECTION
WHEN HANDLING SAFETY GLASS. PERSONAL
INJURY CAN RESULT.CAUTION: Do not damage body or trim finish
when cutting out glass or applying fence primer.
(4) Cut the urethane around the perimeter of the
rear window glass. Refer to Windshield section of
this group for proper procedures.
(5) Separate the rear window from the vehicle.
REAR WINDOW INSTALLATION
(1) Prepare the work area, window fence, and
glass the same way as described in the Windshield
section of this group.
(2) Place fence spacers at the locations shown (Fig.
8).
(3) Install the rear window molding on glass.
(4) Apply a 10 mm (0.4 in.) bead of urethane
around the perimeter of the glass.
(5) Install the glass in the same manner described
in the Windshield section of this group (Fig. 8).
(6) Connect rear window defogger wiring and inte-
rior trim.
(7) After urethane has cured, water test rear win-
dow to verify repair. Verify rear window defogger
operation, see Group 8N, Rear Window Defogger.
Fig. 8 Rear Window Glass
23 - 46 BODYPL
REMOVAL AND INSTALLATION (Continued)

HEATING AND AIR CONDITIONING
CONTENTS
page page
GENERAL INFORMATION
INTRODUCTION......................... 2
SAFETY PRECAUTIONS AND WARNINGS..... 2
DESCRIPTION AND OPERATION
A/C REFRIGERANT LINES................. 3
BLOWER MOTOR RESISTOR............... 3
COMPRESSOR FRONT SHAFT SEAL......... 4
COMPRESSOR.......................... 4
CONDENSATION DRAIN TUBE.............. 4
ENGINE COOLING SSTEM
REQUIREMENTS....................... 4
EVAPORATOR PROBE..................... 4
HANDLING TUBING AND FITTINGS.......... 4
HIGH PRESSURE CUT OUT SWITCH......... 5
LOW PRESSURE CUT OFF SWITCH......... 5
SIDE WINDOW DEMISTERS............... 5
SYSTEM AIRFLOW....................... 5
SYSTEM OIL LEVEL...................... 6
VACUUM CONTROL SYSTEM............... 6
DIAGNOSIS AND TESTING
A/C PERFORMANCE TEST................. 6
BLOWER MOTOR ELECTRICAL DIAGNOSIS . . . 8
BLOWER MOTOR VIBRATION
AND/OR NOISE DIAGNOSIS.............. 8
COMPRESSOR NOISE DIAGNOSIS.......... 7
EVAPORATOR PROBE TEST................ 8
EXPANSION VALVE....................... 7
HEATER PERFORMANCE TEST............. 8
LOW PRESSURE CUT-OFF SWITCH......... 11
SYSTEM CHARGE LEVEL TEST............ 11
VACUUM CONTROL SYSTEM.............. 12
SERVICE PROCEDURES
CHARGING A/C SYSTEM................. 14
EVACUATING REFRIGERANT SYSTEM....... 15R-134a REFRIGERANT................... 16
SERVICING REFRIGERANT OIL LEVEL...... 17
SYSTEM LEAK CHECKING................ 17
REMOVAL AND INSTALLATION
A/C FILTER/DRIER...................... 23
A/C SERVICE PORT VALVE CORES......... 18
BLOWER MOTOR AND WHEEL ASSEMBLY . . . 18
BLOWER MOTOR RESISTOR.............. 18
BLOWER MOTOR WHEEL................ 19
COMPRESSOR CLUTCH/COIL ASSEMBLY.... 19
COMPRESSOR......................... 19
CONDENSATION DRAIN TUBE............ 21
CONDENSER........................... 21
DISCHARGE LINE....................... 21
EVAPORATOR PROBE.................... 22
EVAPORATOR.......................... 21
EXPANSION VALVE...................... 23
HEATER CORE......................... 24
HEATER HOSES........................ 24
HIGH PRESSURE CUT OUT SWITCH........ 23
HIGH PRESSURE RELIEF VALVE........... 24
LIQUID LINE........................... 25
LOW PRESSURE CUT OFF SWITCH........ 25
MODE CONTROL CABLE................. 25
RECIRCULATION DOOR ACTUATOR........ 26
SUCTION LINE......................... 27
TEMPERATURE CONTROL CABLE.......... 27
UNIT HOUSING......................... 27
DISASSEMBLY AND ASSEMBLY
AIR DISTRIBUTION MODULE ±
RECONDITION........................ 28
ADJUSTMENTS
MODE CONTROL CABLE................. 30
TEMPERATURE CONTROL CABLE.......... 30
PLHEATING AND AIR CONDITIONING 24 - 1

CAUTION: The system must be completely empty
before opening any fitting or connection in the
refrigeration system. Open fittings with caution
even after the system has been emptied. If any
pressure is noticed as a fitting is loosened,
retighten fitting and evacuate the system again.
A good rule for the flexible hose lines is to keep
the radius of all bends at least 10 times the diame-
ter of the hose. Sharper bends will reduce the flow
of refrigerant. The flexible hose lines should be
routed so they are at least 3 inches (80 mm) from
the exhaust manifold. Inspect all flexible hose lines
to make sure they are in good condition and prop-
erly routed.
The use of correct wrenches when making con-
nections is very important. Improper wrenches or
improper use of wrenches can damage the fittings.
The internal parts of the A/C system will remain
stable as long as moisture-free refrigerant and
refrigerant oil is used. Abnormal amounts of dirt,
moisture or air can upset the chemical stability.
This may cause operational troubles or even seri-
ous damage if present in more than very small
quantities.
When opening a refrigeration system, have every-
thing you will need to repair the system ready. This
will minimize the amount of time the system must
be opened. Cap or plug all lines and fittings as
soon as they are opened. This will help prevent the
entrance of dirt and moisture. All new lines and
components should be capped or sealed until they
are ready to be used.
All tools, including the refrigerant dispensing
manifold, the manifold gauge set, and test hoses
should be kept clean and dry.
HIGH PRESSURE CUT OUT SWITCH
The high pressure cut out switch is located in the
compressor manifold (Fig. 8). It turns off the com-
pressor if the system pressure exceeds 3240 kPa (470
psi)
LOW PRESSURE CUT OFF SWITCH
The Low Pressure Cut Off Switch (Fig. 9) monitors
the refrigerant gas pressure on the suction side of
the system. The low pressure cut off switch is located
on the expansion valve. The low pressure cut off
switch turns off voltage to the compressor clutch coil
when refrigerant gas pressure drops to levels that
could damage the compressor. The low pressure cut
out switch is a sealed factory calibrated unit. It must
be replaced if defective.
SIDE WINDOW DEMISTERS
The demisters direct air from the unit housing
through the outlets located on the top corners of theinstrument panel. The demisters operate when the
mode selector is anywhere between floor and defrost
settings. Some air may be noticeable from the demis-
ter outlets when the mode selector is in the bilevel to
floor positions.
SYSTEM AIRFLOW
The system pulls outside (ambient) air through the
cowl opening at the base of the windshield. Then it
goes into the plenum chamber above the unit hous-
ing. On air conditioned vehicles, the air passes
through the evaporator. Air flow can be directed
either through or around the heater core. This is
done by adjusting the blend-air door with the TEMP
control on the instrument panel. The air flow can
then be directed from the panel, floor and defrost
Fig. 8 High Pressure Cut Out Switch Location
Fig. 9 Low Pressure Cut Off Switch
PLHEATING AND AIR CONDITIONING 24 - 5
DESCRIPTION AND OPERATION (Continued)

perature in test room and on vehicle must be 21É C
(70ÉF) minimum for this test.
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) Connect a tachometer and manifold gauge set.
(2) Set control to A/C, RECIRC, and PANEL, tem-
perature lever on full cool and blower on high.
(3) Start engine and hold at 1000 rpm with A/C
clutch engaged.
(4) Engine should be warmed up with doors and
windows closed.
(5) Insert a thermometer in the left center A/C
outlet and operate the engine for five minutes. The
A/C clutch may cycle depending on ambient condi-
tions.
(6) With the A/C clutch engaged, compare the dis-
charge air temperature to the A/C Performance Tem-
peratures Table.
(7) If the discharge air temperature fails to meet
the specifications in the performance temperature
chart. Refer to the Refrigerant Service Procedures for
further diagnosis.
COMPRESSOR NOISE DIAGNOSIS
Excessive noise while the A/C is being used, can be
caused by loose mounts, loose clutch, or high operat-
ing pressure. Verify compressor drive belt condition,
proper refrigerant charge and head pressure before
compressor repair is performed.
If the A/C drive belt slips at initial start-up, it does
not necessarily mean the compressor has failed.
With the close tolerances of a compressor it is pos-
sible to experience a temporary lockup. The longer
the A/C system is inactive, the more likely the condi-
tion to occur.
This condition is the result of normal refrigerant
movement within the A/C system caused by temper-
ature changes. The refrigerant movement may wash
the oil out of the compressor.
EXPANSION VALVE
NOTE: Expansion valve tests should be performed
after compressor tests.
Liquid CO2 is required to test the expansion
valve. It is available from most welding supply facil-
ities. CO2 is also available from companies which
service and sell fire extinguishers.
Review Safety Precautions and Warnings in the
General Information section of this Group. The work
area and vehicle must be 21É to 27ÉC (70É to 85ÉF)
when testing expansion valve. To test the expansion
valve:
(1) Connect a charging station or manifold gauge
set to the refrigerant system service ports.
(2) Disconnect wire connector at low pressure cut-
off switch (Fig. 10). Using a jumper wire, jump ter-
minals inside wire connector boot.
A/C PERFORMANCE TEMPERATURES
Ambient Temperature 21ÉC
(70ÉF)26.5ÉC
(80ÉF)32ÉC
(90ÉF)37ÉC
(100ÉF)43ÉC
(110ÉF)
Air Temperature at Left
Center Panel Outlet1-8ÉC
(34-46ÉF)3-9ÉC
(37-49ÉF)4-10ÉC
(39-50ÉF)6-11ÉC
(43-52ÉF)7-18ÉC
(45-65ÉF)
Compressor Discharge
Pressure After the Filter
Drier1034-1724 kPa
(150-250 PSI)1517-2275 kPa
(220-330 PSI)1999-2620 kPa
(290-380 PSI)2068-2965 kPa
(300-430 PSI)2275-3421 kPa
(330-496 PSI)
Evaporator Suction
Pressure103-207 kPa
(15-30 PSI)117-221 kPa
(17-32 psi)138-241 kPa
(20-35 PSI)172-269 kPa
(25-39 PSI)207-345 kPa
(30-50 PSI)
Fig. 10 Low Pressure Cut-Off Switch
PLHEATING AND AIR CONDITIONING 24 - 7
DIAGNOSIS AND TESTING (Continued)

(3) Close all doors, windows and vents to the pas-
senger compartment.
(4) Set Heater-A/C control to A/C, full heat, floor,
RECIRC. and high blower.
(5) Start the engine and hold the idle speed (1000
rpm). After the engine has reached running temper-
ature, allow the passenger compartment to heat up.
This will create the need for maximum refrigerant
flow into the evaporator.
(6) If the refrigerant charge is sufficient, discharge
(high pressure) gauge should read 965 to 2620 kPa
(140 to 380 psi). Suction (low pressure) gauge should
read 103 to 2417 kPa (15 to 35 psi). If system cannot
achieve proper pressure readings, replace the expan-
sion valve. If pressure is correct, proceed with test.
WARNING: PROTECT SKIN AND EYES FROM CON-
TACTING CO2 PERSONAL INJURY CAN RESULT.
(7) If suction side low pressure is within specified
range, freeze the expansion valve control head (Fig.
10) for 30 seconds. Use a super cold substance (liquid
CO2).Do not spray refrigerant on the expansion
valve for this test.Suction side low pressure should
drop to 34.5 kPa (5 psi) If not, replace expansion
valve.
(8) Allow expansion valve to thaw. The low pres-
sure gauge reading should stabilize at 103 to 241
kPa (15 to 35 psi). If not, replace expansion valve.
(9) When expansion valve test is complete, test
A/C overall performance. Refer to the Heater and A/C
Performance Test in this section. Remove all test
equipment before returning vehicle to use.
BLOWER MOTOR ELECTRICAL DIAGNOSIS
Refer to the Blower Motor Electrical System Diag-
nosis chart in this section. Also refer to Group 8W,
Wiring Diagrams for more information.
BLOWER MOTOR VIBRATION AND/OR NOISE
DIAGNOSIS
The resistor block supplies the blower motor with
varied voltage (low and middle speeds) or battery
voltage (high speed).
CAUTION: Stay clear of the blower motor and resis-
tor block (Hot). Do not operate the blower motor
with the resistor block removed from the heater-A/C
housing.
Refer to the Blower Motor Vibration/Noise chart
for diagnosis.
EVAPORATOR PROBE TEST
The work area and vehicle must be between 16É C
(60É F) and 32É C (90É F) when testing the switch.(1) Disconnect the three wire connector from the
evaporator probe lead located behind the glove box.
(2) Start engine and set A/C to low blower motor
speed, panel, full cool, and RECIRC.
(3) Using a voltmeter, check for battery voltage
between Pin 1 and 2. If no voltage is detected, there
is no power to the switch. Check wiring and fuses.
Refer to Group 8W, Wiring Diagrams for circuit diag-
nosis.
(4) Using a voltmeter, check for battery voltage
between Pin 1 and Pin 3. If no voltage is detected,
there is no voltage from the Powertrain Control Mod-
ule. Refer to Group 8W, Wiring Diagrams. If voltage
is OK, connect a jumper wire between Pin 1 and Pin
3. The compressor clutch should engage. If the clutch
engages, remove the jumper wire immediately and go
to Step 5. If the compressor clutch does not engage,
check the operation of the clutch and repair as nec-
essary.
(5) If compressor clutch engages, connect the evap-
orator probe 3-way connector. The compressor clutch
should engage or cycle depending on evaporator tem-
perature. If OK, go to Step 6. If not OK, replace the
clutch cycling switch.
(6) The engine running and the A/C set to:
²Blower motor on low speed
²Panel position
²Full cool
²RECIRC.
Close all doors and windows. Place a thermometer
in the center discharge vent.
(7) If the clutch does not begin to cycle off between
2É C to 7É C (35É F to 45É F), verify that the evapo-
rator probe is fully installed and not loose in evapo-
rator. If it is not properly installed, install probe and
retest outlet temperature. If the evaporator probe is
properly installed, replace the clutch cycling switch.
HEATER PERFORMANCE TEST
PRE-DIAGNOSTIC PREPARATIONS
Review Safety Precautions and Warnings in this
group before performing the following procedures.
Check the coolant level, drive belt tension, vacuum
line connections, radiator air flow and fan operation.
Start engine and allow to warm up to normal tem-
perature.
WARNING: DO NOT REMOVE RADIATOR CAP
WHEN ENGINE IS HOT, PERSONAL INJURY CAN
RESULT.
If vehicle has been run recently, wait 15 minutes
before removing cap. Place a rag over the cap and
turn it to the first safety stop. Allow pressure to
escape through the overflow tube. When the system
stabilizes, remove the cap completely.
24 - 8 HEATING AND AIR CONDITIONINGPL
DIAGNOSIS AND TESTING (Continued)

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 784 grams
(28 oz. or 1.57 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. 12) 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
.
VACUUM CONTROL SYSTEM
Use an adjustable vacuum test set (Special Tool
C-3707) 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. 13), 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 theexact 27 kPa (8 in. Hg.) setting. Otherwise, a false
reading will be obtained during testing.
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 Ouside-air
position.
(3) Move the Circulation control to the Recircula-
tion position (the Circulation door should move into
the 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 (8in. Hg.) after each selection is made.
If the gauge cannot achieve the calibrated setting,
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 instrument panel top cover.
(4) Remove the right side upper instrument panel
bezel.
24 - 12 HEATING AND AIR CONDITIONINGPL
DIAGNOSIS AND TESTING (Continued)

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.
CAUTION: Do not overcharge refrigerant system,
as excessive compressor head pressure can cause
noise and system failure.
After the system has been tested for leaks and
evacuated, a refrigerant (R-134a) charge can be
injected into the system.
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) If using a separate vacuum pump close all
valves before disconnecting pump. Connect manifold
gauge set to the A/C service ports (Fig. 14).
NOTE: The air conditioning system in this vehicle
holds 784 grams (28 oz. or 1.57 lbs.) of R-134a
refrigerant.
(2) Measure refrigerant (refer to capacities). Refer
to the instructions provided with the equipment
being used.
(3) Verify engine is shut off. Open the suction and
discharge valves. Open the charge valve to allow the
refrigerant to flow into the system. When the trans-
fer of refrigerant has stopped, close the suction and
discharge valve.
(4) If all of the charge did not transfer from the
dispensing device, put vehicle controls into the fol-
lowing mode:
²Automatic transaxle in park or manual tran-
saxle in neutral²Engine idling at 700 rpm
²A/C control set in 100 percent outside air
²Panel mode
²Blower motor ON high speed
²Vehicle windows closed
If the A/C compressor does not engage, test the
compressor clutch control circuit and correct any fail-
ure. Refer to Group 8W, Wiring Diagrams.
(5) Open the suction valve to allow the remaining
refrigerant to transfer to the system.
WARNING: TAKE CARE NOT TO OPEN THE DIS-
CHARGE (HIGH-PRESSURE) VALVE AT THIS TIME.
(6) Close all valves and test the A/C system perfor-
mance.
(7) Disconnect the charging station or manifold
gauge set. Install the service port caps.
EVACUATING REFRIGERANT SYSTEM
NOTE: Special effort must be used to prevent mois-
ture from entering the A/C system oil. Moisture in
the oil is very difficult to remove and will cause a
reliability problem with the compressor.
If a compressor designed to use R-134a refrigerant
is left open to the atmosphere for an extended period
of time. It is recommended that the refrigerant oil be
drained and replaced with new oil or a new compres-
sor be used. This will eliminate the possibility of con-
taminating the refrigerant system.
If the refrigerant system has been open to the
atmosphere, it must be evacuated before the system
can be filled. Moisture and air mixed with the refrig-
erant will raise the compressor head pressure above
acceptable operating levels. This will reduce the per-
formance of the air conditioner and damage the com-
pressor. Moisture will boil at near room temperature
when exposed to vacuum. To evacuate the refrigerant
system:
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) Connect a suitable charging station, refrigerant
recovery machine, and a manifold gauge set with
vacuum pump (Fig. 15).
(2) Open the suction and discharge valves and
start the vacuum pump. The vacuum pump should
run a minimum of 45 minutes prior to charge to
eliminate all moisture in system. When the suction
gauge reads -88 kPa (- 26 in. Hg) vacuum or greater
for 45 minutes, close all valves and turn off vacuum
pump. If the system fails to reach specified vacuum,
PLHEATING AND AIR CONDITIONING 24 - 15
SERVICE PROCEDURES (Continued)