1999 DODGE NEON Service Repair Manual

SYMPTOM POSSIBLE CAUSE
Wind noise from sunroof.²Front of glass panel too high or rear too low.
²Glass panel not centered in opening.
²Faulty glass panel seal.
Glass panel hangs up or snaps between
vent and open.²Glass panel improperly adjusted.
²Glass panel seal has inconsistent compression.
Rattles from open sunroof while driving²Loose attaching hardware.
²Weak springs on wind deflector.
²Sunshade out of the track.
Rattles from closed sunroof while driving²Loose attaching hardware.
²Wind deflector contacting glass panel or drain trough.
²Sunshade out of the track.
REMOVAL AND INSTALLATION
SUNROOF PROCEDURE INFORMATION
The numbered call-outs in the following ser-
vice procedures refer the numbered parts
found in the figure at the end of this section.
SUNROOF CABLES
REMOVAL
(1) Remove sunroof glass panel (4). Refer to proce-
dure found in this section.
(2) Cycle the sunroof mechanism to the full for-
ward position.
CAUTION: Do not remove sunroof drive motor
unless sunroof mechanism is in the full forward
position.
(3) Remove sunroof drive motor (10). Refer to pro-
cedure found in this section.
(4) Remove front locator (7 or 8) for appropriate
sunroof cable.
(5) Disengage sunroof cable from sunroof mecha-
nism (9).
(6) Pull sunroof cable from drive tube (2 or 3).
INSTALLATION
(1) Push sunroof cable through drive tube (2 or 3).(2) Engage sunroof cable into sunroof mechanism
(9) making sure cable connecting rod is rotated at a
45 degree angle towards inside of vehicle (Fig. 1).
(3) Install front locator (7 or 8) over sunroof cable.
Moving the sunroof mechanism rearward slightly will
ease locator installation.
(4) Move sunroof to full forward position.
(5) Install sunroof drive motor (10).
(6) Install sunroof glass panel (5). Refer to proce-
dure found in this section.Fig. 1 Front View of Guide
23 - 48 BODYPL
DIAGNOSIS AND TESTING (Continued)

SUNROOF COMPONENTS
SUNROOF DRIVE MOTOR
CAUTION: Do not cycle the sunroof drive motor
prior to installation. The drive motor is shipped in
the closed position. The sunroof vent position is
programmed into the drive motor and is dependent
upon the drive motor closed position. If the drive
motor and the sunroof mechanism are not both in
the closed position, the sunroof vent height will not
be correct.
REMOVAL
(1) Remove headlining until the sunroof drive
motor (10) can be accessed.
(2) If the drive motor is to be reused, cycle the
sunroof to the full forward position.
(3) Disconnect wire harness connector from motor.
(4) Remove the three screws attaching drive motor
to sunroof module bracket.
(5) Separate drive motor (10) from bracket.
Fig. 2 Sunroof Components
Item Number Component Name Item Number Component Name
1 Drive Tube Locator 8 Locator R.H.
2 Drive Tube L.H. 9 Mechanism
3 Drive Tube R.H. 10 Drive Motor
4 Glass Reinforcment
Panel11 Sunshade
5 Guide 12 Tray Assembly
6 Sunshade Guide 13 Wind Deflector
7 Locator L.H.
PLBODY 23 - 49
REMOVAL AND INSTALLATION (Continued)

INSTALLATION
(1) With the aid of a helper, hold the sunroof glass
panel in the closed position and engage the drive
motor (10) into the sunroof drive cables.
(2) Install screws holding drive motor to bracket.
(3) Connect wire harness to drive motor.
(4) Install headlining.
SUNROOF GLASS PANEL
REMOVAL
(1) Position sunroof sunshade (4) in full rearward
position.
(2) Remove six glass attachment screws.
(3) Push glass panel upward from underside until
glass panel clears the roof panel.
(4) Lift glass panel from vehicle.
INSTALLATION
(1) Position glass panel (4) in opening in vehicle
roof.
(2) Install, but do not tighten, glass attachment
screws.
(3) With the aid of a helper, hold the glass panel in
position and tighten glass attachment screws.
(4) Verify the correct glass height. Refer to Glass
Height Adjustment procedure in this section.
SUNROOF GUIDE AND MECHANISM ASSEMBLY
REMOVAL
(1) Remove sunroof glass panel (4). Refer to proce-
dure in this section.
(2) Remove front locator (7 or 8).
(3) Disengage cable from mechanism (9).
(4) Remove screws holding sunroof guide (5) and
mechanism (9) assembly to sunroof module.
(5) Lift assembly from module.
(6) Rotate assembly to disengage wind deflector
(13) from assembly.
INSTALLATION
(1) Engage wind deflector (13) into guide (5) and
mechanism (9) assembly.
(2) Position assembly onto module and install
screws holding assembly to sunroof module.
(3) Engage drive cable to mechanism.
(4) Install front locator (7 or 8 ). It may ease
installation to move sunroof mechanism slightly rear-
ward.
(5) Install sunroof glass panel. Refer to procedure
found in this section.
SUNROOF MODULE
REMOVAL
(1) Remove headlining.
(2) Remove fasteners attaching sunroof module to
vehicle roof and support braces.
(3) With the aid of a helper, separate sunroof mod-
ule from roof.
(4) Remove sunroof module from vehicle.
INSTALLATION
(1) With the aid of a helper, position sunroof mod-
ule in vehicle.
(2) Install fasteners holding sunroof module to
vehicle roof.
(3) Tighten all fasteners, starting from the front
and working rearward and then the motor bracket.
(4) Adjust glass panel for flushness to roof. Refer
to glass adjustment procedure in this section.
(5) Install headlining.
(6) Verify correct operation.
SUNROOF SUNSHADE
REMOVAL
(1) Remove sunroof glass panel (4). Refer to proce-
dure found in this section.
(2) Slide sunshade (11) to full forward position.
(3) Disengage slide blocks on one side of sunshade
from sunshade guide (6).
(4) Lift and pull sunshade out of opposite sun-
shade guide.
INSTALLATION
(1) Place sunshade with cloth side down and
install one side's slide blocks into the track on the
sunshade guide (6).
(2) Slide the other side's slide blocks to fully
inward position and insert them into the sunshade
guide (6).
(3) Verify that all four slide blocks are fully
engaged in the sunshade guide (6).
(4) Slide sunshade (11) fully rearward.
(5) Install sunroof glass panel (4). Refer to proce-
dure found in this section.
SUNROOF WIND DEFLECTOR
REMOVAL
(1) Open sunroof to full open position.
(2) Pull one end of wind deflector flap out of the
wind deflector beam (13).
(3) Release corner piece locking tab and separate
corner piece from wind deflector beam.
(4) Rotate corner piece outboard to release tab
from roof flange.
23 - 50 BODYPL
REMOVAL AND INSTALLATION (Continued)

(5) Rotate corner piece to a vertical position and
pull it up through hole in guide (5).
(6) Repeat for other corner piece.
INSTALLATION
(1) Hold corner piece vertically and push tab down
through hole in guide (5).
(2) Rotate corner piece inward and place tab under
roof flange.
(3) Connect corner piece to wind deflector beam
(13).
(4) Install wind deflector flap into wind deflector
beam.
(5) Repeat for other corner piece.
ADJUSTMENTS
SUNROOF GLASS HEIGHT ADJUSTMENT
FLUSHNESS
(1) Position sunshade in full rearward position.
(2) To adjust front of glass;
(a) Loosen front and middle glass attachment
screws
(b) Adjust front of sunroof glass panel so that
the corners are flush to 1.0 mm below the top sur-
face of the roof panel.(c) Tighten all glass attachment screws.
(3) To adjust rear of glass;
(a) Loosen rear and middle glass attachment
screws
(b) Adjust rear of sunroof glass panel so that the
corners are flush to61.0 mm off the top surface of
the roof panel.
(c) Tighten all glass attachment screws.
VENT HEIGHT
(1) Cycle the sunroof module to vent position using
the drive motor.
(2) Check glass height in tilt using the appropriate
measuring tool.
(3) If the vent height is greater than 35 mm, using
switch slowly set to correct height.
(4) After setting correct height, remove drive
motor.
(5) With the motor removed, use the switch to set
tilt by operating the gear to the full closed position.
(6) Using tilt switch only, operate the motor until
it comes to a full stop at tilt position.
(7) Install drive motor and verify correct operation.
PLBODY 23 - 51
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

GENERAL INFORMATION
INTRODUCTION
Both the heater and the heater/air conditioning
systems share many of the same functioning compo-
nents. This group will deal with both systems
together when component function is common, and
separately when they are not.
For proper operation of the instrument panel con-
trols, refer to the Owner's Manual provided with the
vehicle.
The unit housing is divided into two sides. The left
side is called the air distribution module. The air dis-
tribution module is the same on vehicles with or
without air conditioning. On the right side there is
either a blower module (non-A/C vehicles) or an evap-
orator/blower module (vehicles with A/C). The blower
module is unique to heater only systems (Fig. 1).
The air distribution module contains the heater
core and doors used to control air flow. The vehicle
uses the same air distribution module on all models
(with or without air conditioning).
The air conditioning evaporator is located in the
evaporator/blower module (Fig. 2).
To service the heater core, evaporator and/or any of
the air doors the unit housing must be removed from
the vehicle.
SAFETY PRECAUTIONS AND WARNINGS
WARNING: WEAR EYE PROTECTION WHEN SER-
VICING THE AIR CONDITIONING REFRIGERANT
SYSTEM. SERIOUS EYE INJURY CAN RESULT
FROM EYE CONTACT WITH REFRIGERANT. IF EYE
CONTACT IS MADE, SEEK MEDICAL ATTENTION
IMMEDIATELY.
DO NOT EXPOSE REFRIGERANT TO OPEN
FLAME. POISONOUS GAS IS CREATED WHENREFRIGERANT IS BURNED. AN ELECTRONIC TYPE
LEAK DETECTOR IS RECOMMENDED.
LARGE AMOUNTS OF REFRIGERANT RELEASED
IN A CLOSED WORK AREA WILL DISPLACE THE
OXYGEN AND CAUSE SUFFOCATION.
THE EVAPORATION RATE OF REFRIGERANT AT
AVERAGE TEMPERATURE AND ALTITUDE IS
EXTREMELY HIGH. AS A RESULT, ANYTHING THAT
COMES IN CONTACT WITH THE REFRIGERANT
WILL FREEZE. ALWAYS PROTECT SKIN OR DELI-
CATE OBJECTS FROM DIRECT CONTACT WITH
REFRIGERANT. R-134a SERVICE EQUIPMENT OR
VEHICLE A/C SYSTEM SHOULD NOT BE PRES-
SURE TESTED OR LEAK TESTED WITH COM-
PRESSED AIR.
SOME MIXTURES OF AIR and R-134a HAVE BEEN
SHOWN TO BE COMBUSTIBLE AT ELEVATED
PRESSURES. THESE MIXTURES ARE POTENTIALLY
DANGEROUS AND MAY RESULT IN FIRE OR
EXPLOSION CAUSING INJURY OR PROPERTY
DAMAGE.
ANTIFREEZE IS AN ETHYLENE GLYCOL BASE
COOLANT AND IS HARMFUL IF SWALLOWED OR
INHALED. SEEK MEDICAL ATTENTION IMMEDI-
ATELY IF SWALLOWED OR INHALED. DO NOT
STORE IN OPEN OR UNMARKED CONTAINERS.
WASH SKIN AND CLOTHING THOROUGHLY AFTER
COMING IN CONTACT WITH ETHYLENE GLYCOL.
KEEP OUT OF REACH OF CHILDREN AND PETS.
DO NOT OPEN A COOLING SYSTEM WHEN THE
ENGINE IS AT RUNNING TEMPERATURE. PER-
SONAL INJURY CAN RESULT.
CAUTION: The engine cooling system is designed
to develop internal pressure of 97 to 123 kPa (14 to
18 psi). Allow the vehicle to cool a minimum of 15
minutes before opening the cooling system. Refer
to Group 7, Cooling System.
Fig. 2 A/C Heater Unit Housing
Fig. 1 Heater Only Unit Housing
24 - 2 HEATING AND AIR CONDITIONINGPL

DESCRIPTION AND OPERATION
A/C REFRIGERANT LINES
DISCHARGE LINE
The discharge line is the line that goes from the
compressor to the condenser (Fig. 3). It has no ser-
viceable parts except the rubber O- rings. If the line
is found to be leaking or is damaged it must be
replaced as an assembly.
LIQUID LINE
The liquid line is the line that goes from the con-
denser to drier (Fig. 4). It has no serviceable parts
except the rubber O-rings. If the line is found to be
leaking or is damaged it must be replaced as an
assembly.
SUCTION LINE
The suction line is the large line that connects to
the expansion valve and goes to the compressor (Fig.
4). It also has a small line that goes to the filter/
drier. The suction line uses a gasket on the expan-
sion valve side and rubber O-rings on all other
connections.There are no serviceable parts on the suction line
other than the rubber O-rings and expansion valve
gasket. If the line is found to be leaking or is dam-
aged it must be replaced as an assembly.
A/C SERVICE PORT VALVE CORES
The A/C service port valve cores are serviceable
(Fig. 5) and (Fig. 6).
BLOWER MOTOR RESISTOR
The blower motor resistor is located in the cowl, at
the base of the windshield. There are two different
resistor blocks depending on whether the vehicle is
equipped with A/C or not. The blower motor resistors
will get hot when in use. Do not touch resistor block
if the blower motor has been running (Fig. 7).
Fig. 3 Discharge Line
Fig. 4 Liquid/Suction Line
Fig. 5 High Side Service Port Valve
Fig. 6 Low Side Service Port Valve
PLHEATING AND AIR CONDITIONING 24 - 3