stick closely. If there is any doubt about its condition,
drain out a sample for a double check.
MopartATF+4 (Automatic Transmission Fluid)
when new is red in color. The ATF is dyed red so it
can be identified from other fluids used in the vehicle
such as engine oil or antifreeze. The red color is not
permanent and is not an indicator of fluid condition.
As the vehicle is driven, the ATF will begin to look
darker in color and may eventually become brown.
This is normal.ATF+4 also has a unique odor that
may change with age. Consequently,odor and color
cannot be used to indicate the fluid condition
or the need for a fluid change.
After the fluid has been checked, seat the dipstick
fully to seal out water and dirt.STANDARD PROCEDURE - FLUID AND FILTER
SERVICE
NOTE: Refer to the maintenance schedules in
LUBRICATION and MAINTENANCE, or the vehicle
owner's manual, for the recommended maintenance
(fluid/filter change) intervals for this transaxle.
NOTE: Only fluids of the type labeled MoparTATF+4
(Automatic Transmission Fluid) should be used. A
filter change should be made at the time of the
transmission oil change. The magnet (on the inside
of the oil pan) should also be cleaned with a clean,
dry cloth.
NOTE: If the transaxle is disassembled for any rea-
son, the fluid and filter should be changed.
Fig. 206 Transmission Fluid Temperature Chart
1 - MAX. LEVEL2 - MIN. LEVEL
RS41TE AUTOMATIC TRANSAXLE21 - 231
FLUID (Continued)
RIGID, SEMI-RIGID, AND FLEXIBLE PLASTIC PARTS TYPES
CODE FAMILY NAME COMMON TRADE NAME TYPICAL APPLICATION
ASA ACRYLONITRILE STYRENE
ACRYLITELURAN S CONSOLES, GRILLES
ABS ACRYLONITRILE
BUTADIENE STYRENETERLURAN9A9PILLARS, CONSOLES,
GRILLES
ABS/PC ABS/PC ALLOY PULSE, PROLOY, BAYBLEND DOORS, INSTRUMENT
PANELS
ABS/PVC ABS/PV ALLOY PROLOY, PULSE, LUSTRAN,
CYCLOVINDOOR PANELS, GRILLES,
TRIM
BMC BULK MOLDING
COMPOUNDBMC FENDER EXTENSIONS
EMA EHTYLENE METHYL
ACRYLATE/IONOMERSURLYN, EMA, IONOMER BUMPER GUARDS, PADS
METTON METTON METTON GRILLES, KICK PANELS,
RUNNING BOARDS
MPPO MODIFIED
POLYPHENYLENE OXIDEMPPO SPOILER ASSEMBLY
PA POLYAMID ZYTEL, VYDYNE, PA,
MINLONFENDERS, QUARTER
PANELS
PET THERMOPLASTIC
POLYESTERRYNITE TRIM
PBT/PPO PBT/PPO ALLOY GERMAX CLADDINGS
PBTP POLYBUTYLENE
THEREPTHALATEPBT, PBTP, POCAN, VALOX WHEEL COVERS, FENDERS,
GRILLES
PBTP/EEBC POLYBUTYLENE
THEREPTHALATE/EEBC
ALLOYBEXLOY,9M9, PBTP/EEBC FASCIAS, ROCKER PANEL,
MOLDINGS
PC POLYCARBONATE LEXAN, MERLON, CALIBRE,
MAKROLON PCTAIL LIGHT LENSES, IP TRIM,
VALANCE PANELS
PC/ABS PC/ABS ALLOY GERMAX, BAY BLENDS,
PULSEDOORS, INSTRUMENT
PANELS
PPO POLYPHENYLENE OXIDE AZDEL, HOSTALEN,
MARLEX, PRFAX, NORYL,
GTX, PPOINTERIOR TRIM, DOOR
PANELS, SPLASH SHIELDS,
STEERING COLUMN
SHROUD
PPO/PA POLYPHENYLENE/
POLYAMIDPPO/PA, GTX 910 FENDERS, QUARTER
PANELS
PR/FV FIBERGLASS REINFORCED
PLASTICFIBERGLASS, FV, PR/FV BODY PANELS
PS POLYSTYRENE LUSTREX, STYRON, PS DOOR PANELS, DASH
PANELS
RTM RESIN TRANSFER
MOLDING COMPOUNDRTM BODY PANELS
SMC SHEET MOLDED
COMPOUNDSMC BODY PANELS
TMC TRANSFER MOLDING
COMPOUNDTMC GRILLES
23 - 4 BODYRS
BODY (Continued)
²Panel repair for both flexible and rigid panels
are basically the same. The primary difference
between flexible panel repair and rigid panel repair
is in the adhesive materials used (Fig. 5).
²The technician should first decide what needs to
be done when working on any type of body panel.
One should determine if it is possible to return the
damage part to its original strength and appearance
without exceeding the value of the replacement part.
²When plastic repairs are required, it is recom-
mended that the part be left on the vehicle when
every possible. That will save time, and the panel
will remain stationary during the repair. Misalign-
ment can cause stress in the repair areas and can
result in future failure.
VISUAL INSPECTION
Composite materials can mask the severity of an
accident. Adhesive bond lines, interior structure of
the doors, and steel structures need to be inspected
carefully to get a true damage assessment. Close
inspection may require partial removal of interior
trim or inner panels.
Identify the type of repair: Puncture or Crack -
Damage that has penetrated completely through the
panel. Damage is confined to one general area; a
panel section is not required. However, a backer
panel, open fiberglass tape, or matted material must
be bonded from behind (Fig. 7) (Fig. 6).
PANEL SURFACE PREPARATION
If a body panel has been punctured, cracked, or
crushed, the damaged area must be removed from
the panel to achieve a successful repair. All spider
web cracks leading away from a damaged area must
be stopped or removed. To stop a running crack in a
panel, drilla6mm(0.250 in.) hole at the end of the
crack farthest away from the damage. If spider web
cracks can not be stopped, the panel would require
replacement. The surfaces around the damaged area
should be stripped of paint and freed from wax and
oil. Scuff surfaces around repair area with 360 grit
wet/dry sandpaper, or equivalent, to assure adhesion
of repair materials.
PATCHING PANELS
An panel that has extensive puncture type damage
can be repaired by cutting out the damaged material
(Fig. 7). Use a suitable reciprocating saw or cut off
wheel to remove the section of the panel that is dam-
aged. The piece cut out can be used as a template to
shape the new patch. It is not necessary to have
access to the back of the panel to install a patch.
Bevel edges of cutout at 20 degrees to expose a larger
bonding area on the outer side. This will allow for an
increased reinforcement areas.
PANEL PATCH FABRICATIONS
A patch can be fabricated from any rigid fiberglass
panel that has comparable contour with the repair
area. Lift gates and fenders can be used to supply
patch material. If existing material is not available
or compatible, a patch can be constructed with adhe-
sive and reinforcement mesh (dry wall tape). Perform
the following operation if required:
Fig. 4 BEVELING ANGLE - 20 DEGREE
Fig. 5 FIBERGLASS TAPE
Fig. 6 DAMAGE COMPONENT
1 - PUNCTURE
RSBODY23-7
BODY (Continued)
HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page page
HEATING & AIR CONDITIONING
DESCRIPTION
ENGINE COOLING SYSTEM
REQUIREMENTS.......................1
HEATER AND AIR CONDITIONER..........1
MANUAL SINGLE ZONE.................2
MANUAL DUAL ZONE...................2
MANUAL THREE ZONE..................2
AUTOMATIC TEMPERATURE CONTROL....3
OPERATION
HEATER AND AIR CONDITIONER..........4
MANUAL SINGLE ZONE.................4
MANUAL DUAL ZONE...................5
MANUAL THREE ZONE..................5AUTOMATIC TEMPERATURE CONTROL....5
DIAGNOSIS AND TESTING
A/C COOL DOWN TEST.................6
A/C PERFORMANCE TEST...............7
HEATER PERFORMANCE TEST..........10
SPECIFICATIONS
A/C SYSTEM.........................11
CONTROLS - FRONT.....................13
CONTROLS - REAR......................33
DISTRIBUTION - FRONT...................42
DISTRIBUTION - REAR....................56
PLUMBING - FRONT.....................64
PLUMBING - REAR......................98
CABIN HEATER........................113
HEATING & AIR
CONDITIONING
DESCRIPTION
ENGINE COOLING SYSTEM REQUIREMENTS
To maintain the performance level of the heating,
ventilation and air conditioning (HVAC) system, the
engine cooling system must be properly maintained.
The use of a bug screen is not recommended. Any
obstructions in front of the radiator or condenser will
reduce the performance of the air conditioning and
engine cooling systems.
The engine cooling system includes the radiator,
thermostat, radiator hoses and the engine coolant
pump. Refer to Cooling for more information before
opening or attempting any service to the engine cool-
ing system.
HEATER AND AIR CONDITIONER
A manually controlled single zone type heating-air
conditioning system, manually controlled dual zone
type heating-air conditioning system, manually con-
trolled three zone type heating-air conditioning sys-
tem or an automatic controlled three zone type
heating-air conditioning system is available on this
model.
All vehicles are equipped with a common heater,
ventilation and air conditioning (HVAC) housing (Fig.
1). The system combines air conditioning, heating,
and ventilating capabilities in a single unit housingmounted within the passenger compartment under
the instrument panel. The HVAC housing includes:
²Blower motor
²Blower motor resistor block or power module
(depending on application)
²Heater core
²Evaporator coil
²Blend door and actuator
²Mode door and actuator
²Recirculation door and actuator
Based upon the system and mode selected, condi-
tioned air can exit the HVAC housing through one or
Fig. 1 HVAC Housing - LHD Shown, RHD Typical
1 - HVAC HOUSING
2 - BOLT
3 - BRACKET
4 - DASH PANEL
RSHEATING & AIR CONDITIONING24-1
²a rotary knob for front fan speed selection can
override the automatic controls. LEDs surrounding
the knob show the current setting.
²a rotary knob for control of the rear system
(Three-Zone ATC system only).
²a rotary knob for mode control can override the
automatic controls. LEDs surrounding the knob show
the current setting.
²computer logic which remembers the settings of
the controls when the ignition is turned off and
retains those settings after a restart. If the system is
off when the ignition is turned off it will be off when
the engine is restarted, etc.
²computer logic which provides variable air recir-
culation under high temperature and humidity condi-
tions. Because recirculation is generally accompanied
by increased fan noise, the proportion of recirculated
to outside air gradually approaches full recirculation
over a broad temperature range.
²computer logic which enables additional heat for
diesel equipped vehicles by using a supplemental
engine coolant heater.
REAR CONTROL PANEL
The Three-Zone ATC sytem utilizes a rear control
panel centrally mounted on the headliner which
includes a VF digital display, a rocker control for
temperature and rotary controls for adjustment of
mode and fan speed of the rear heating-A/C system
by intermediate seat passengers.
OPERATION
HEATER AND AIR CONDITIONER
The heating and air conditioning systems pulls
outside (ambient) air through the cowl opening at the
base of the windshield and into the plenum chamber
above the heating, ventilation and air conditioning
(HVAC) housing, then through the evaporator coil.
Air flow can be directed either through or around the
heater core by adjusting the blend door with the tem-
perature control knob on the A/C-heater control
located on instrument panel. The air flow can then
be directed out from the panel, floor and defrost out-
lets in various combinations using the mode control
knob located on the A/C-heater control. Air flow
velocity can be adjusted with the blower speed selec-
tor located on the A/C-heater control.
NOTE: It is important to keep the air intake opening
clear of debris. Leaf particles and other debris that
is small enough to pass through the cowl opening
screen can accumulate within the HVAC housing.
The closed, warm, damp and dark environment cre-
ated within the housing is ideal for the growth of
certain molds, mildews and other fungi. Any accu-mulation of decaying plant matter provides an addi-
tional food source for fungal spores, which enter
the housing with the fresh intake-air. Excess debris,
as well as objectionable odors created by decaying
plant matter and growing fungi can be discharged
into the passenger compartment during heater-A/C
operation if the air intake opening is not kept clear
of debris.
The heater and air conditioning system is a blend-
air type system. In a blend-air system, a blend door
controls the amount of conditioned air that is allowed
to flow through, or around, the heater core. The tem-
perature control knob determines the discharge air
temperature by actuating an electric motor, which
operates the blend door. This allows an almost imme-
diate control of the output air temperature of the sys-
tem.
On all models, the outside air intake can be shut
off by pressing the Recirculation button on the A/C-
heater control. This will operate a electric actuated
recirculation air door that closes off the outside fresh
air intake and recirculates the air that is already
inside the vehicle.
The air conditioning compressor can be engaged in
any mode by pressing the snowflake, A/C on/off but-
ton. It can also be engaged by placing the mode con-
trol in the mix to defrost positions. This will remove
heat and humidity from the air before it is directed
through or around the heater core. The mode control
knob on the A/C-heater control is used to also direct
the conditioned air to the selected system outlets.
The mode control switch uses an electric motor to
control the mode doors.MANUAL SINGLE ZONE
²The temperature control knob enables continu-
ously variable proportioning of the conditioned air.
²The mode control knob enables continuously
variable proportioning of air flow between modes and
has detents adjacent to each icon.
²The blower control provides four separate speeds
and an Off position.
²When the heater-A/C system is off, the HVAC
computer closes the recirculation door to prevent out-
side air from entering the passenger compartment.
²Interior air may be recirculated to speed up
heating or cooling in all modes except defrost and
mix by pressing the Recirculate button on the A/C-
heater control.
²To reduce humidity for rapid defogging, the A/C
compressor runs automatically in modes from ªmixº
to full defrost when outside temperatures are above
freezing.
²Air conditioning is available in any mode by
pressing the snowflake, A/C on/off button.
24 - 4 HEATING & AIR CONDITIONINGRS
HEATING & AIR CONDITIONING (Continued)
(b) If the compressor clutch coil current reading
is four amperes or more, the coil is shorted and
must be replaced.
STANDARD PROCEDURE
CLUTCH INSPECTION
NOTE: The compressor clutch can be serviced in
the vehicle. The refrigerant system can remain fully-
charged during compressor clutch, pulley, or coil
replacement.
Examine the friction surfaces of the clutch pulley
and the clutch plate for wear. The pulley and plate
should be replaced if there is excessive wear or scor-
ing.
If the friction surfaces are oily, inspect the shaft
and nose area of the A/C compressor for refrigerant
oil. If refrigerant oil is found, the compressor shaft
seal is leaking and the A/C compressor must be
replaced.
Check the clutch pulley bearing for roughness or
excessive leakage of grease. Replace the pulley and
bearing assembly, if required.
A/C CLUTCH BREAK-IN
After a new A/C compressor clutch has been
installed, cycle the compressor clutch approximately
twenty times (five seconds on, then five seconds off).
During this procedure, set the A/C-heater controls to
the A/C Recirculation Mode, the blower motor in the
highest speed position, and the engine speed at 1500
to 2000 rpm. This procedure (burnishing) will seat
the opposing friction surfaces of the compressor
clutch, which provides optimum compressor clutch
torque capability.
REMOVAL
NOTE: The compressor clutch can be serviced in
the vehicle. The refrigerant system can remain fully-
charged during compressor clutch, pulley, or coil
replacement.
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(3) Raise and support the vehicle.
(4) Disconnect the engine wire harness connector
for the compressor clutch coil from the clutch coil pig-
tail wire connector on the top of the A/C compressor.
(5) On models with the 3.3L and 3.8L engines, dis-
engage the retainer on the engine wire harness com-pressor clutch coil take out from the bracket on the
top of the A/C compressor.
(6) On models with the 2.4L, 2.5L and 2.8L
engines, remove all of the compressor mounting bolts
except the upper left (rear of the A/C compressor),
which should only be loosened. Allow the front (pul-
ley end) of the A/C compressor to tilt downward far
enough to access the clutch for removal, then tighten
the loosened upper left compressor mounting bolt.
(7) On models with the 3.3L and 3.8L engines,
remove the two bolts and two nuts that secure the
A/C compressor to the engine. Disengage the mount-
ing ear at the front of the A/C compressor from the
stud on the engine, allow the front (pulley end) of the
A/C compressor to tilt downward far enough to access
the clutch for removal, then reinstall and tighten the
upper left compressor mounting bolt.
(8) Remove the compressor shaft bolt (Fig. 2). A
band-type oil filter wrench or a strap wrench may be
used to secure the clutch during bolt removal.
(9) Tap the clutch plate lightly with a plastic mal-
let to release it from the splines on the compressor
shaft. Remove the clutch plate and shim(s) from the
compressor shaft (Fig. 3).
NOTE: Use care not to lose any of the shim(s).
Fig. 2 A/C Compressor Shaft Bolt
1 - BOLT
2 - COMPRESSOR CLUTCH PLATE
RSCONTROLS - FRONT24-15
A/C COMPRESSOR CLUTCH/COIL (Continued)
A/C COMPRESSOR CLUTCH
RELAY
DESCRIPTION
The compressor clutch relay (Fig. 7) is a Interna-
tional Standards Organization (ISO) mini-relay.
Relays conforming to the ISO specifications have
common physical dimensions, current capacities, ter-
minal patterns, and terminal functions. The ISO
mini-relay terminal functions are the same as a con-
ventional ISO relay. However, the ISO mini-relay ter-
minal pattern (or footprint) is different, the current
capacity is lower, and the physical dimensions are
smaller than those of the conventional ISO relay. The
A/C compressor clutch relay is located in the inte-
grated power module (IPM) in the engine compart-
ment. See the fuse and relay map molded into the
inner surface of the cover of the IPM for A/C com-
pressor clutch relay identification and location.
The black, molded plastic case is the most visible
component of the A/C compressor clutch relay. Five
male spade-type terminals extend from the bottom of
the base to connect the relay to the vehicle electrical
system, and the ISO designation for each terminal is
molded into the base adjacent to each terminal. The
ISO terminal designations are as follows:
²30 (Common Feed)- This terminal is con-
nected to the movable contact point of the relay.
²85 (Coil Ground)- This terminal is connected
to the ground feed side of the relay control coil.
²86 (Coil Battery)- This terminal is connected
to the battery feed side of the relay control coil.
²87 (Normally Open)- This terminal is con-
nected to the normally open fixed contact point of the
relay.²87A (Normally Closed)- This terminal is con-
nected to the normally closed fixed contact point of
the relay.
OPERATION
The A/C compressor clutch relay is an electrome-
chanical switch that uses a low current input from
the powertrain control module (PCM) to control the
high current output to the compressor clutch electro-
magnetic coil. The movable common feed contact
point is held against the fixed normally closed con-
tact point by spring pressure. When the relay coil is
energized, an electromagnetic field is produced by the
coil windings. This electromagnetic field draws the
movable relay contact point away from the fixed nor-
mally closed contact point, and holds it against the
fixed normally open contact point. When the relay
coil is de-energized, spring pressure returns the mov-
able contact point back against the fixed normally
closed contact point. The resistor or diode is con-
nected in parallel with the relay coil in the relay, and
helps to dissipate voltage spikes and electromagnetic
interference that can be generated as the electromag-
netic field of the relay coil collapses.
The compressor clutch relay terminals are con-
nected to the vehicle electrical system through a
receptacle in the integrated power module (IPM). The
inputs and outputs of the A/C compressor clutch
relay include:
²The common feed terminal (30) receives a bat-
tery current input from a fuse in the IPM through a
fused B(+) circuit at all times.
²The coil ground terminal (85) receives a ground
input from the PCM through the compressor clutch
relay control circuit only when the PCM electroni-
cally pulls the control circuit to ground.
²The coil battery terminal (86) receives a battery
current input from the PCM through a fused ignition
switch output (run-start) circuit only when the igni-
tion switch is in the On or Start positions.
²The normally open terminal (87) provides a bat-
tery current output to the compressor clutch coil
through the compressor clutch relay output circuit
only when the compressor clutch relay coil is ener-
gized.
²The normally closed terminal (87A) is not con-
nected to any circuit in this application, but provides
a battery current output only when the compressor
clutch relay coil is de-energized.
The A/C compressor clutch relay cannot be
repaired and, if faulty or damaged, it must be
replaced. Refer to the appropriate wiring information
for diagnosis and testing of the micro-relay and for
complete HVAC wiring diagrams.
Fig. 7 A/C Compressor Clutch Relay
24 - 18 CONTROLS - FRONTRS
mance and to protect the system components from
damage. The A/C pressure transducer input to the
PCM will also prevent the A/C compressor clutch
from engaging when ambient temperatures are below
about 4.5É C (40É F) due to the pressure/temperature
relationship of the refrigerant. The Schrader-type
valve in the liquid line fitting permits the A/C pres-
sure transducer to be removed or installed without
disturbing the refrigerant in the system. The A/C
pressure transducer is diagnosed using a DRBIIIt
scan tool. Refer to Body Diagnostic Procedures.
DIAGNOSIS AND TESTING
A/C PRESSURE TRANSDUCER
The A/C pressure transducer is tested using a
DRBIIItscan tool. Refer to the appropriate diagnos-
tic information. Before testing the A/C pressure
transducer, be certain that the transducer wire har-
ness connection is clean of corrosion and properly
connected. For the A/C to operate, an A/C pressure
transducer voltage reading between 0.451 and 4.519
volts is required. Voltages outside this range indicate
a low or high refrigerant system pressure condition
to the powertrain control module (PCM). The PCM is
programmed to respond to a low or high refrigerant
system pressure by suppressing operation of the A/C
compressor. Refer to the A/C Pressure Transducer
Voltage chart for the possible conditions indicated by
the transducer voltage reading.
A/C PRESSURE TRANSDUCER VOLTAGE
Voltage Possible Indication
0.0 1. No sensor supply voltage from
PCM.
2. Shorted sensor circuit.
3. Faulty transducer.
0.150 TO 0.450 1. Ambient temperature below
10É C (50É F).
2. Low refrigerant system
pressure.
0.451 TO 4.519 1. Normal refrigerant system
pressure.
4.520 TO 4.850 1. High refrigerant system
pressure.
5.0 1. Open sensor circuit.
2. Faulty transducer.
REMOVAL
NOTE: Note: It is not necessary to discharge the
refrigerant system to replace the A/C pressure
transducer.
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the wire harness connector from the
A/C pressure transducer (Fig. 10).
(3) Remove the A/C pressure transducer from the
fitting on the liquid line.
(4) Remove the O-ring seal from the A/C pressure
transducer fitting and discard.
INSTALLATION
NOTE: Replace the O-ring seal before installing the
A/C pressure transducer.
(1) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the A/C pressure
transducer fitting. Use only the specified O-rings as
they are made of a special material for the R-134a
system. Use only refrigerant oil of the type recom-
mended for the A/C compressor in the vehicle.
(2) Install and tighten the A/C pressure transducer
onto the fitting onto the liquid line fitting.
(3) Connect the wire harness connector to the A/C
pressure transducer.
(4) Reconnect the battery negative cable.
Fig. 10 A/C Pressure Transducer - Typical
1 - RIGHT FRONT STRUT TOWER
2 - WIRE HARNESS CONNECTOR
3 - A/C PRESSURE TRANSDUCER
4 - WIPER MODULE DRAIN TUBE
5 - HIGH SIDE SERVICE PORT
6 - LIQUID LINE
RSCONTROLS - FRONT24-21
A/C PRESSURE TRANSDUCER (Continued)