ECU CHRYSLER CARAVAN 2005 Service Manual

COWL GRILLE
REMOVAL
(1) Remove wiper arms. (Refer to 8 - ELECTRI-
CAL/WIPERS/WASHERS/WIPER ARMS -
REMOVAL)
(2) Remove four (4) screws securing cowl cover to
wiper module (Fig. 6).
(3) Disengage quarter turn fasteners at outboard
ends of cowl grill from body.
(4) Release hood latch and open hood.
CAUTION: To prevent hood scratching of cowl grille
before removal, cover outboard exterior ends of
cowl grille with masking tape or equivalent method.
NOTE: Do not over bend cowl grille during removal.
Bend cowl grille just enough to clear top of wiper
pivot shaft and bottom rear corner of hood.
(5) Remove cowl grill by raising above driver side
wiper pivot shaft and swinging away towards engine
compartment. The cowl grille will need to be bent onoutboard end to clear simultaneously top of wiper
pivot shaft and bottom corner of hood.
(6) Close hood. Do not latch. Remove outboard
screws. (Fig. 7).
(7) Disconnect washer hose in line connector.
(8) Disconnect washer hose and grommet from
hole in wiper module and pull out.
(9) Remove cowl grille by raising over opposite
wiper pivot shaft and removing away from vehicle.
(10) Remove cowl cover from vehicle.
INSTALLATION
(1) Reverse removal procedure.
(2) When installing cowl cover over wiper module,
make sure fore aft locator on the underside of cowl
grill seat into the locator grooves on top of wiper
module.
(3) Start all cowl grille mounting screws by hand
before torquing to specifications.
(4) Assure washer hose is properly routed and not
pinched.
(5) Center cowl grille to body and windshield.
(6) Assure ªarrowº indicator head of quarter turn
fasteners is pointing toward windshield.
Fig. 5 BODY SIDE MOLDINGS WITH APPLIQUE - TYPICAL
1 - FRONT ROCKER PANEL APPLIQUE
2 - FRONT DOOR MOLDING
3 - SLIDING DOOR MOLDING4 - REAR ROCKER PANEL APPLIQUE
5 - LIFTGATE MOLDING
6 - POP-RIVET
23 - 50 EXTERIORRS
BODY SIDE MOLDINGS (Continued)

(7) Tighten screw to 1.2 N´m (11 in. lbs.) torque.
(8) Install the wiper arms. (Refer to 8 - ELECTRI-
CAL/WIPERS/WASHERS/WIPER ARMS - INSTAL-
LATION)
(9) Check for proper spray pattern from washer
nozzles.
EXTERIOR NAME PLATES -
TAPE ATTACHED
REMOVAL
(1) Mark reference points before removing.
(2) Using a heat gun gently apply heat in a circu-
lar motion to loosen the adhesive bond.
(3) Using a nonmetallic prying device, such as a
plastic or wood trim stick gently pry up at corners
and remove.
(4) Clean off all traces of adhesive or double sided
tape from the panel with a general purpose adhesive
remover.
INSTALLATION
(1) Clean panel surface with isopropy alcohol.
(2) Align badgeing to reference points.
(3) Install and press securely to full adhesive con-
tact
(4) Clean away any reference points.
EXTERIOR NAME PLATES -
ADHESIVE ATTACHED
REMOVAL
(1) Mark reference points before removing.
(2) Using a heat gun gently apply heat in a circu-
lar motion to loosen the adhesive bond.
(3) With your fingernail lift up and peel away
badgeing/tape from panel, using a heat gun as you
go.
(4) Clean off all traces of adhesive from the pan-
el(s) with a general purpose adhesive remover.
INSTALLATION
(1) Clean panel surface with isopropy alcohol.
(2) Remove paper carrier and align badgeing/tape
to reference points or adjacent panel.
(3) Install and press securely, using a plastic
spreader to eliminate all air bubbles.
(4) Remove top protective carrier.
(5) Clean away any reference points.
FRONT FENDER
REMOVAL
(1) Remove headlamp housing. (Refer to 8 - ELEC-
TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD-
LAMP UNIT - REMOVAL)
(2) Remove mirror bezel
(3) Remove mud guard.
(4) Remove inner splash shield.
(5) Remove fender to fascia nuts.
Fig. 6 COWL COVER
1 - COWL COVER
2 - WIPER PIVOT
3 - WASHER HOSES
4 - HOOD
Fig. 7 COWL COVER RETAINERS
1 - SCREW
2 - WINDSHIELD
3 - COWL COVER
4 - FRONT FENDER
RSEXTERIOR23-51
COWL GRILLE (Continued)

HOOD
TABLE OF CONTENTS
page page
HINGE
REMOVAL.............................62
INSTALLATION.........................62
HOOD
REMOVAL.............................62
INSTALLATION.........................63
LATCH
REMOVAL.............................63INSTALLATION.........................63
LATCH RELEASE CABLE
REMOVAL.............................63
INSTALLATION.........................64
LATCH STRIKER
REMOVAL.............................64
INSTALLATION.........................64
HINGE
REMOVAL
(1) Remove Front Wiper Unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL) for procedure.
(2) Raise hood.
(3) Mark all bolt and hinge attachment locations
with a grease pencil or other suitable device to pro-
vide reference marks for installation.
(4) Remove pivot bolt from the body half of hood
hinge and use suitable device to support the hood.
(5) Remove bolts attaching body half of hood hinge
to front fender flange and remove hinge from vehicle
(Fig. 1).
INSTALLATION
(1) If necessary, paint new hinge before installa-
tion.
(2) Place body half of hood hinge in position on
vehicle.
(3) Install bolts attaching hood hinge to front
fender flange. Tighten bolts to 8 N´m (70 in. lbs.)
torque.
(4) Install pivot bolt to the body half of hood hinge.
Tighten bolts to 28 N´m (21 ft. lbs.) torque.
(5) Install Front Wiper Unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
INSTALLATION) for proper procedures.
(6) Align all marks and secure bolts. The hood
should be aligned to 4 mm (0.160 in.) gap to the front
fenders and flush across the top surfaces along fend-
ers. Shims can be added or removed under hood
hinge to achieve proper hood height. Tighten bolts to
13.5 N´m (10 ft. lbs.) torque.Close hood.
HOOD
REMOVAL
(1) Raise hood to full up position.
(2) Mark all bolt and hinge attachment locations
with a grease pencil or other suitable device to pro-
vide reference marks for installation.
(3) Remove the top bolts attaching hood to hinge
and loosen the bottom bolts until they can be
removed by hand (Fig. 2).
(4) With assistance from a helper at the opposite
side of the vehicle to support the hood, remove bot-
tom bolts attaching hood to hinge.
(5) Remove the hood from the vehicle.
Fig. 1 HOOD HINGE
1 - HOOD
2 - HOOD HALF OF HOOD HINGE
3 - HOOD HINGE PIVOT BUSHING
4 - BODY HALF OF HOOD HINGE
5 - FENDER
23 - 62 HOODRS

(1) Slide lower seat belt cover rearward to expose
anchor fastener.
(2) Remove bolt/nut attaching lower seat belt
anchor to floor.
(3) Remove upper B-pillar trim cover.
(4) Remove access panel from B-pillar trim (Fig.
3).
(5) Disengage hidden clips attaching lower trim
cover to B-pillar.
(6) Remove lower B-pillar trim cover from vehicle.
INSTALLATION
NOTE: The driver's side a double ended stud is
used. A nut has to be removed for the seat belt
anchor removal and the stud for the retractor
removal.
NOTE: On the passenger side there is a belt tension
sensor.
(1) On the passenger side secure grommet to seat
belt sensor connector into bottom of B-pillar lower
trim prior to install B-pillar lower trim cover.(2) Place lower B-pillar trim cover in position on
vehicle (Fig. 3).
(3) Insert seat belt through hole in lower B-pillar
trim.
(4) Engage hidden clips attaching lower trim cover
to B-pillar.
(5) Install access cover.
(6) Install upper B-pillar trim cover.
(7) Place seat belt anchor in position on floor so
webbing is pointed rearward and slightly outboard.
(8) Install bolt/nut attaching lower seat belt
anchor to floor. Tighten seat belt anchor bolt/nut to
39 N´m (29 ft. lbs.) torque.
(9) Verify that seat belt anchor does not interfere
with seat track travel.
B-PILLAR UPPER TRIM
REMOVAL
(1) Remove bolt attaching lower seat belt anchor to
floor.
(2) Lower shoulder belt height adjuster to the bot-
tom of travel.
(3) Remove shoulder belt turning loop from height
adjuster.
(4) Use a Snap-ontTrim Pad Remover tool
(A179A), or equivalent, and remove shoulder belt
height adjuster knob.
(5) Remove shoulder belt bezel from trim cover
(Fig. 3).
(6) Remove screw attaching trim cover to B-pillar
from inside bezel cavity.
(7) Disengage hidden clips attaching trim cover to
B-pillar.
(8) Remove B-pillar trim cover from vehicle.
INSTALLATION
(1) Insert seat belt through B-pillar trim and web
guide (Fig. 3).
(2) Place B-pillar trim cover in position on vehicle.
(3) Engage hidden clips attaching trim cover to
B-pillar.
(4) Install shoulder belt bezel into trim cover.
(5) Install height adjuster knob.
(6) Install shoulder belt turning loop onto height
adjuster. Tighten bolt to 39 N´m (29 ft. lbs.) torque.
(7) Place seat anchor in position on floor so web-
bing is pointed rearward and slightly outboard or self
aligning tab on passenger side.
(8) Install bolt attaching lower seat belt anchor to
floor. Tighten seat belt bolt to 39 N´m (29 ft. lbs.)
torque.
Fig. 3 LOWER B-PILLAR TRIM COVER
1 - B-PILLAR UPPER TRIM
2 - B-PILLAR UPPER PLUG
3 - POWER SLIDING DOOR SWITCH AND BEZEL
4 - BELT ASSEMBLY
5 - B-PILLAR LOWER TRIM
23 - 80 INTERIORRS
B-PILLAR LOWER TRIM (Continued)

STATIONARY GLASS
TABLE OF CONTENTS
page page
WINDSHIELD
DESCRIPTION........................161
WARNING
WINDSHIELD SAFETY PRECAUTIONS....161
REMOVAL............................161
INSTALLATION........................162
SLIDING DOOR GLASS
REMOVAL............................163INSTALLATION........................163
QUARTER WINDOW
REMOVAL............................164
INSTALLATION........................164
LIFTGATE GLASS
REMOVAL............................164
INSTALLATION........................164
WINDSHIELD
DESCRIPTION
The windshield is attached to the window frame
with urethane adhesive. The urethane adhesive is
applied cold and seals the surface area between the
window opening and the glass. The primer adheres
the urethane adhesive to the 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.
WARNING
WINDSHIELD 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
PINCH WELD (FENCE) PRIMER PROVIDED BY THE
ADHESIVE MANUFACTURER. IF NOT, STRUCTURAL
INTEGRITY COULD BE COMPROMISED.
DAIMLERCHRYSLER DOES NOT RECOMMEND
GLASS ADHESIVE BY BRAND. TECHNICIANS
SHOULD REVIEW PRODUCT LABELS AND TECHNI-
CAL DATA SHEETS, AND USE ONLY ADHESIVESTHAT THEIR MANUFACTURES WARRANT WILL
RESTORE A VEHICLE TO THE REQUIREMENTS OF
FMVSS 212. TECHNICIANS SHOULD ALSO INSURE
THAT PRIMERS 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.
REMOVAL
WINDSHIELD REMOVAL ± EXTERIOR METHOD
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.
(1) Remove inside rear view mirror.
(2) Remove windshield wiper arms.
(3) Remove cowl cover.
RSSTATIONARY GLASS23 - 161

CONTROLS - FRONT
TABLE OF CONTENTS
page page
A/C COMPRESSOR CLUTCH/COIL
DESCRIPTION.........................13
OPERATION...........................13
DIAGNOSIS AND TESTING
A/C COMPRESSOR CLUTCH COIL........14
STANDARD PROCEDURE
CLUTCH INSPECTION.................15
A/C CLUTCH BREAK-IN................15
REMOVAL.............................15
INSTALLATION.........................16
A/C COMPRESSOR CLUTCH RELAY
DESCRIPTION.........................18
OPERATION...........................18
REMOVAL.............................19
INSTALLATION.........................19
A/C HEATER CONTROL
DESCRIPTION.........................19
STANDARD PROCEDURE
A/C-HEATER CONTROL CALIBRATION.....19
REMOVAL.............................20
INSTALLATION.........................20
A/C PRESSURE TRANSDUCER
DESCRIPTION.........................20
OPERATION...........................20
DIAGNOSIS AND TESTING
A/C PRESSURE TRANSDUCER..........21
REMOVAL.............................21
INSTALLATION.........................21
BLEND DOOR ACTUATOR
DESCRIPTION.........................22
OPERATION...........................22
REMOVAL.............................22
INSTALLATION.........................22
BLOWER MOTOR RELAY
DESCRIPTION.........................23
OPERATION...........................23
REMOVAL.............................24INSTALLATION.........................24
BLOWER MOTOR RESISTOR BLOCK
DESCRIPTION.........................24
OPERATION...........................24
DIAGNOSIS AND TESTING
FRONT BLOWER MOTOR RESISTOR
BLOCK.............................25
REMOVAL.............................25
INSTALLATION.........................25
EVAPORATOR TEMPERATURE SENSOR
DESCRIPTION.........................26
OPERATION...........................27
REMOVAL
RG MODELS.........................27
RS MODELS.........................27
INSTALLATION
RG MODELS.........................27
RS MODELS.........................28
INFRARED TEMPERATURE SENSOR
DESCRIPTION.........................28
OPERATION...........................28
MODE DOOR ACTUATOR
DESCRIPTION.........................29
OPERATION...........................29
REMOVAL.............................29
INSTALLATION.........................30
POWER MODULE - BLOWER MOTOR
DESCRIPTION.........................30
OPERATION...........................30
REMOVAL.............................30
INSTALLATION.........................31
RECIRCULATION DOOR ACTUATOR
DESCRIPTION.........................31
OPERATION...........................31
REMOVAL.............................32
INSTALLATION.........................32
A/C COMPRESSOR CLUTCH/
COIL
DESCRIPTION
The A/C compressor clutch assembly consists of a
stationary electromagnetic A/C clutch field coil with a
zener diode, a pulley bearing and pulley assembly,
and a clutch plate (Fig. 1). These components provide
the means to engage and disengage the A/C compres-
sor from the engine accessory drive belt.The A/C clutch field coil and the pulley bearing
and pulley assembly are both retained on the nose of
the A/C compressor with snap rings. The clutch plate
is splined to the compressor shaft and secured with a
bolt.
OPERATION
The compressor clutch components provide the
means to engage and disengage the compressor from
the engine serpentine accessory drive belt. When the
clutch coil is energized, it magnetically draws the
RSCONTROLS - FRONT24-13

(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)

CAUTION: Do not pry between the clutch plate unit
and the pulley to remove the clutch plate from the
compressor shaft as this may damage the clutch
plate.
(10) Using snap ring pliers (Special Tool C-4574 or
equivalent), remove the external snap ring that
secures the pulley to the front cover of the A/C com-
pressor, then slide the pulley off of the compressor
(Fig. 4).
(11) Remove the screw that secures the clutch coil
pigtail wire connector bracket and ground clip to the
top of the compressor housing.
(12) Using snap ring pliers (Special Tool C-4574 or
equivalent), remove the external snap ring that
secures the clutch coil to the front cover of the com-
pressor housing, then slide the clutch coil off of the
A/C compressor (Fig. 5).
INSTALLATION
(1) Align the dowel pin on the back of the clutch
coil with the hole in the compressor front cover and
position the clutch coil onto the A/C compressor. Be
certain that the clutch coil pigtail wires are properly
oriented and routed so that they are not pinched
between the compressor front cover and the clutch
coil.
NOTE: A new snap ring must be used to secure the
clutch coil to the A/C compressor. The bevel side of
the snap ring must face outward.(2) Using snap ring pliers (Special Tool C-4574 or
equivalent), install the external snap ring that
secures the clutch coil to the front cover of the A/C
Fig. 3 Clutch Plate and Shim(s)
1 - COMPRESSOR SHAFT
2 - CLUCH PLATE
3 - SHIM
Fig. 4 Clutch Pulley Snap Ring
1 - SNAP RING
2 - SNAP RING PLIERS
3 - CLUTCH PULLEY AND BEARING
Fig. 5 Remove Clutch Coil Snap Ring
1 - SNAP RING PLIERS
2 - CLUTCH COIL
3 - COMPRESSOR
4 - SNAP RING
24 - 16 CONTROLS - FRONTRS
A/C COMPRESSOR CLUTCH/COIL (Continued)

compressor. The bevel side of the snap ring must face
outward and both snap ring eyelets must be oriented
to the right or the left of the clutch coil dowel pin
location on the A/C compressor. Be certain that the
snap ring is fully and properly seated in the groove.
CAUTION: If the snap ring is not fully seated in the
groove it will vibrate out, resulting in a clutch fail-
ure and severe damage to the compressor front
cover.
(3) Install and securely tighten the screw that
secures the clutch coil pigtail wire connector bracket
and ground clip to the top of the compressor housing.
(4) Install the pulley onto the front cover of the
A/C compressor. If necessary, tap the pulley gently
with a block of wood placed on the pulley friction sur-
face (Fig. 6).
CAUTION: Do not mar the friction surfaces of the
pulley.
NOTE: A new snap ring must be used to secure the
clutch pulley to the A/C compressor. The bevel side
of the snap ring must face outward.
(5) Using snap ring pliers (Special Tool C-4574 or
equivalent), install the external snap ring (bevel side
facing outward) that secures the clutch pulley to the
front cover of the A/C compressor. Be certain that the
snap ring is fully and properly seated in the groove.(6) If the original clutch plate and clutch pulley
are to be reused, reinstall the original shim(s) on the
compressor shaft against the shoulder. If a new
clutch plate and/or clutch pulley are being used,
install a trial stack of shims 2.54 mm (0.010 in.)
thick on the compressor shaft against the shoulder.
(7) Install the clutch plate onto the compressor
shaft.
NOTE: The shims may compress after tightening
the shaft bolt. Check the air gap in four or more
places to verify the air gap is still correct. Spin the
pulley before performing a final check of the air
gap.
(8) With the clutch plate assembly tight against
the shim(s), measure the air gap between the clutch
plate and the pulley face with feeler gauges. The air
gap should be between 0.35 - 0.60 mm (0.014 - 0.024
in.). If the proper air gap is not obtained, add or sub-
tract shims as needed until the desired air gap is
obtained.
(9) Install the compressor shaft bolt. Tighten the
bolt to 17.5 N´m (155 in. lbs.).
(10) On models with the 2.4L, 2.5L and 2.8L
engines, loosely install the four bolts that secure the
A/C compressor to the mounting bracket on the
engine (2.4L), or the cylinder block (2.5L/2.8L).
Tighten the bolts to 28 N´m (21 ft. lbs.).
(11) On models with the 3.3L and 3.8L engines,
loosely install the two bolts and two nuts that secure
the A/C compressor to the engine. Tighten each of the
fasteners to 54 N´m (40 ft. lbs.) using the following
sequence:
²The upper nut at the front of the compressor.
²The lower nut at the front of the compressor.
²The upper bolt at the rear of the compressor.
²The lower bolt at the rear of the compressor.
(12) On models with the 3.3L and 3.8L engines,
engage the retainer on the engine wire harness com-
pressor clutch coil take out with the bracket on the
top of the A/C compressor.
(13) Connect the engine wire harness connector to
the A/C compressor clutch coil.
(14) Install the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(15) Lower the vehicle.
(16) Reconnect the negative battery cable.
Fig. 6 Clutch Pulley - Installation
1 - PULLEY AND BEARING
2 - WOOD BLOCK
RSCONTROLS - FRONT24-17
A/C COMPRESSOR CLUTCH/COIL (Continued)

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 center bezel from the instrument
panel (Refer to 23 - BODY/INSTRUMENT PANEL/
INSTRUMENT PANEL CENTER BEZEL -
REMOVAL).
(3) Place the instrument panel center bezel unit
face down on a suitable work surface. Take the
proper precautions to protect the center bezel from
cosmetic damage.
(4) If the vehicle is equipped with the optional
Automatic Temperature Control (ATC) system, dis-
connect the infrared sensor jumper harness connector
from the receptacle on the back of the A/C-heater
control (Fig. 9).
(5) Remove the six screws that secure the A/C-
heater control to the back of the instrument panel
center bezel.
(6) Remove the A/C-heater control from the instru-
ment panel center bezel.
INSTALLATION
(1) Position the A/C-heater control onto the back of
instrument panel center bezel.
(2) Install the six screws that secure the A/C-
heater control to the back of the instrument panel
center bezel. Tighten the screws to 2 N´m (17 in.
lbs.).
(3) If the vehicle is equipped with the optional
ATC system, reconnect the infrared sensor jumper
harness connector to A/C-heater control.
(4) Install the center bezel onto the instrument
panel (Refer to 23 - BODY/INSTRUMENT PANEL/
INSTRUMENT PANEL CENTER BEZEL - INSTAL-
LATION).
(5) Reconnect the battery negative cable.
A/C PRESSURE TRANSDUCER
DESCRIPTION
The A/C pressure transducer is a switch that is
installed on a fitting located on the refrigerant liquid
line between the receiver/drier and the expansion
valve in the right rear corner of the engine compart-
ment. An internally threaded hex fitting on the
transducer connects it to the externally threaded
Schrader-type fitting on the liquid line. A rubber
O-ring seals the connection between the transducer
and the liquid line fitting. Three terminals within a
molded plastic connector receptacle on the top of the
transducer connect it to the vehicle electrical system
through a wire lead and connector of the headlamp
and dash wire harness.
The A/C pressure transducer cannot be adjusted or
repaired and, if faulty or damaged, it must be
replaced.
OPERATION
The A/C pressure transducer monitors the pres-
sures in the high side of the refrigerant system
through its connection to a fitting on the liquid line.
The transducer will change its internal resistance in
response to the pressures it monitors. The power-
train control module (PCM) provides a five volt ref-
erence signal and a sensor ground to the transducer,
then monitors the output voltage of the transducer
on a sensor return circuit to determine refrigerant
pressure. The PCM is programmed to respond to this
and other sensor inputs by controlling the operation
of the A/C compressor clutch and the radiator cooling
fan to help optimize air conditioning system perfor-
Fig. 9 A/C-Heater Control ± ATC shown, MTC typical
1 - INFRARED SENSOR CONNECTOR (ATC ONLY)
2 - INFRARED SENSOR HARNESS (ATC ONLY)
3 - A/C-HEATER CONTROL
4 - SCREW (6)
5- INSTRUMENT PANEL CENTER BEZEL
24 - 20 CONTROLS - FRONTRS
A/C HEATER CONTROL (Continued)