wiring CHRYSLER CARAVAN 2003 Service Manual

of the latch mounting bracket and then unhook
swedged cable end from the latch link.
(7) Remove the hold open latch from the side door.
(Refer to 23 - BODY/DOORS - SLIDING/HOLD
OPEN LATCH - REMOVAL)
(8) Disconnect the hold open latch cable from the
hold open latch. Gently pry cable sleeve retainer out
of the handle bracket and then unhook swedged
cable end from the latch link.
(9) Remove the hold open latch cable from the side
door.
INSTALLATION
NOTE: For power sliding door procedures refer to
POWER SLIDING DOOR SYSTEM in the ELECTRI-
CAL section.
(1) Match the replacement cable up against the old
cable to verify the correct part.
(2) Position the hold open latch cable on the side
door.
NOTE: The hold open latch cable is marked with
white tape. It must be attached to the upper most
cable attachment at the latch. This position is
marked with a ªWº on the latch.
(3) Connect the hold open latch cable on the hold
open latch assembly. Hook the swedged cable end onthe latch link and gently push the cable sleeve
retainer in the latch bracket.
(4) Install the hold open latch on the side door.(Re-
fer to 23 - BODY/DOORS - SLIDING/HOLD OPEN
LATCH - INSTALLATION)
(5) Connect the hold open latch cable on the latch
assembly. Hook the swedged cable end on the latch
link and gently push the cable sleeve retainer in the
latch bracket.
(6) Trace the outside handle cable along its routing
path and install on its retaining clips and position
foam insulators. Use previously made schematic as a
guide or remove the opposite side door trim panel
and use that door as a guide.
CAUTION: Be certain replacement cable is routed
and retained correctly and foam insulators are
properly positioned.
(7) Install the latch assembly. (Refer to 8 - ELEC-
TRICAL/POWER DOORS/LATCH - INSTALLATION)
(8) Place the watershield into position and press
securely to adhesive making sure to properly route
wiring and linkages.
(9) Install the appropriate side door trim panel on
the vehicle. (Refer to 23 - BODY/DOORS - SLIDING/
TRIM PANEL - INSTALLATION)
(10) Connect the negative battery cable.
23 - 38 DOORS - SLIDINGRS
HOLD OPEN LATCH CABLE (Continued)
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GLOVE BOX LATCH STRIKER
REMOVAL
(1) Open glove box door.
(2) Remove screws holding lock striker to instru-
ment panel.
(3) Remove glove box latch striker.
INSTALLATION
(1) Install the glove box latch striker.
(2) Install the screws holding latch striker to
instrument panel.
(3) Close glove box door.
INSTRUMENT PANEL
ASSEMBLY
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the lower console:
(a) Remove six retaining screws.
(b) Pull rearward and disconnect the auxiliary
power outlet.
(c) Remove lower console from vehicle.
(3) Remove the bolts attaching the lower supports
to the instrument panel frame (Fig. 3).
(4) Remove the bolts attaching the lower supports
to the floor pan.
(5) Disconnect the wire connectors from the Pas-
senger Airbag.
(6) Remove the two screws to each right and left
cowl trim covers.
(7) Remove the both left and right side A-pillar
trim covers using a trim stick (special tool #C-4755)
or equivalent gently pry out on the trim covers and
remove.
(8) Remove the glove box:
(a) Push in on sides of glove box bin and lower
door.
(b) Pivot glove box downward and disengage
hinge hooks from instrument panel.
(c) Remove glove box from vehicle.
(9) Disconnect the antenna lead connector from
behind the glove box.
(10) Remove the four screws to the lower steering
column cover.
(11) Remove the eight screws to the steering col-
umn backing plate.
(12) Unclip the Data Link Connector (DLC) from
the steering column backing plate.
(13) Disconnect the left side wiring:
(a) Brake switch.
(b) Main bulkhead connector.(c) Five harness connectors.
(d) Driver airbag connector.
(14) Remove the two screws to the hood release
handle.
(15) Remove five screws to steering column back-
ing plate and remove (Refer to 23 - BODY/INSTRU-
MENT PANEL/KNEE BLOCKER - REMOVAL).
(16) Remove the two steering column shroud
retaining screws. Separate the shrouds and remove
from vehicle.
(17) Remove the screws attaching the instrument
panel reinforcement and remove (Fig. 4).
(18) Disconnect the steering column wiring. There
are seven connectors and then unclip the harness
from the column.
(19) Disconnect the Occupant Restraint Controller
(ORC) harness connector.
(20) Remove the four nuts retaining the steering
column to the dash panel steering column mounting
bracket and lower column to the floor (Fig. 5).
(21) Remove the four nuts attaching the instru-
ment panel to the brake pedal support bracket.
(22) Loosen the left side roll down bolt (Fig. 6).
(23) Remove the left side A-pillar retaining bolts.
There are two 13 mm bolts and one 10 mm bolt.
(24) If equipped with a mechanical transmission
range indicator:
(a) Remove the indicator cable loop.
(b) Remove the clip holding gear shift cable end
to the gear selector adapter.
(c) Pull the cable end from gear selector.
(d) Disconnect the clip for the indicator cable
and guide tube from the shift cable bracket and
move out of the way.
(25) Remove the instrument panel top cover. Using
a trim stick or equivalent, gently pry up on the front
edge of the top cover, pull rearward and remove from
vehicle.
(26) Disconnect the right side wire connectors from
the HVAC behind the glove box area and the two
antenna connectors behind the glove box hinge.
(27) Remove the right end cover by pulling out-
board.
(28) Remove the right side A-pillar retaining bolts.
There are two 13 mm bolts and one 10 mm bolt.
(29) Loosen the right side roll down bolt.
(30) Disconnect the two front window defroster
grid wire connectors. One on each side of vehicle.
(31) Remove both the left and right power mirrors:
(a) Using a trim stick or equivalent, gently pry
out on mirror trim cover.
(b) Open door and remove the three torx retain-
ing screws.
(c) Disconnect the wire connector and remove
mirror from the vehicle.
23 - 64 INSTRUMENT PANELRS
ProCarManuals.com

(11) If equipped with a mechanical transmission
range indicator:
(a) Connect the clip for the indicator cable and
guide tube to the shift cable bracket.
(b) Install the cable end to the gear selector.
(c) Install the clip holding the gear shift cable
end to the gear selector adapter.
(d) Install the indicator cable loop.
(12) Tighten the left side roll down bolt.
(13) Install the four nuts attaching the instrument
panel to the brake pedal support bracket.
(14) Install the four nuts retaining the steering
column and lower to the floor (Fig. 5).
(15) Connect the Occupant Restraint Controller
(ORC) harness connector.
(16) Connect the steering column wiring. There
are seven connectors and then clip the harness to the
column.
(17) Install the screws attaching the instrument
panel reinforcement (Fig. 4).
(18) Connect the shrouds and install the two steer-
ing column shroud retaining screws.
(19) Install five screws to the left under column
instrument panel reinforcement brace.
(20) Install the two screws to the hood release
handle.
(21) Connect the left side wiring:
(a) Brake switch.
(b) Main bulkhead connector.(c) Five harness connectors.
(d) Driver airbag connector.
(22) Clip the Data Link Connector (DLC) to the
steering column backing plate.
(23) Install the eight screws to the steering column
backing plate.
(24) Install the four screws to the lower steering
column cover.
(25) Install the glove box:
(a) Install glove box into the vehicle. Line up the
hinges and firmly snap together.
(b) Push in on sides of glove box bin and raise
door.
(26) Install the both left and right side A-pillar
trim covers. Position trim cover over slots and firmly
snap into place.
(27) Install the two screws to each right and left
cowl trim covers.
(28) Connect the wire connectors to the Passenger
Airbag.
(29) Install the bolts attaching the lower supports
to the floor pan.
(30) Install the bolts attaching the lower supports
to the instrument panel frame (Fig. 3).
(31) Install the lower console:
(a) Install lower console to vehicle.
(b) Connect the auxiliary power outlet.
(c) Install the six retaining screws.
(32) Connect the battery negative cable.
Fig. 6 INSTRUMENT PANEL REMOVAL
1 - INSTRUMENT PANEL
2 - FIVE ATTACHING SCREWS
3 - 13 mm BOLT - TWO ON EACH SIDE4 - ROLL DOWN BRACKET
5 - 10 mm BOLT - STARTING BOLT ONE EACH SIDE
23 - 66 INSTRUMENT PANELRS
INSTRUMENT PANEL ASSEMBLY (Continued)
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INSTALLATION
(1) Place upper C-pillar trim in position on vehicle
(Fig. 6).
(2) Engage hidden clips attaching trim to upper
C-pillar.
(3) Install screw attaching C-pillar trim panel to
C-pillar.
(4) Install seat belt turning loop onto height
adjuster. Tighten all seat belt bolts to 39 N´m (29 ft.
lbs.) torque.
(5) Install quarter trim panel.
DOOR SILL TRIM PLATE
REMOVAL
(1) Using trim stick (C-4755), disengage hidden
clips holding door sill plate from door sill.
(2) Remove sill plate from vehicle (Fig. 7).
INSTALLATION
(1) Place sill plate in position on vehicle (Fig. 7).
(2) Align interlock tabs at front and rear to mating
trim.
(3) Engage hidden clips to hold door sill plate to
door sill.
HEADLINER
REMOVAL
(1) Remove sun visors and vanity mirrors.
(2) Remove sun visor center supports.
(3) If equipped, remove coat hooks.
(4) If equipped, remove roof rail modules.
(5) Remove A-pillar trim covers.
(6) Remove B-pillar upper trim covers.
(7) Remove C-pillar upper trim covers.
(8) Remove D-pillar trim covers.
(9) Remove liftgate opening header trim.
(10) If equipped, remove overhead console screw.
(11) If equipped, remove reading lamp.
(12) Remove dome lamp.
(13) Remove push in locking fasteners attaching
headlining to rear roof header and roof bows (Fig. 8).
(14) Remove wiring connections.
(15) Remove headlining from roof.
(16) Extract headlining through liftgate opening.
INSTALLATION
(1) Insert headlining through liftgate opening.
(2) Place headlining in position on roof.
(3) Connect wire connectors.
(4) Install left sun visor support.
(5) Install push in locking fasteners attaching
headlining to rear roof header and bows (Fig. 8).
(6) Install right sun visor support.
(7) Install sun visors and vanity mirrors.
(8) If equipped, install roof rail modules.
(9) If equipped, install coat hooks.
(10) Install dome lamp.
(11) If equipped, install reading lamp.
(12) If equipped, install overhead console.
Fig. 6 C-PILLAR
1 - C-PILLAR TRIM PANEL
2 - C-PILLAR
Fig. 7 DOOR SILL PLATE
1 - CLIPS
2 - SLIDING DOOR SILL TRIM PLATE
3 - FRONT DOOR SILL TRIM PLATE
23 - 76 INTERIORRS
C-PILLAR TRIM (Continued)
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SUNROOF
TABLE OF CONTENTS
page page
SUNROOF
DESCRIPTION........................113
DIAGNOSIS AND TESTING - SUNROOF.....113
DRAIN TUBE
REMOVAL............................116
INSTALLATION........................117
GLASS PANEL
REMOVAL............................117
INSTALLATION........................117
ADJUSTMENTS
SUNROOF GLASS PANEL ADJUSTMENT . . 117
SUNROOF ASSEMBLY
REMOVAL............................117
INSTALLATION........................117
SUNSHADE
REMOVAL............................117INSTALLATION........................118
WIND DEFLECTOR
REMOVAL............................118
INSTALLATION........................118
WATER CHANNEL
REMOVAL............................118
INSTALLATION........................118
SUNROOF MOTOR
REMOVAL............................118
INSTALLATION........................118
ADJUSTMENTS
ADJUSTMENT.......................119
SUNROOF SWITCH
REMOVAL............................120
INSTALLATION........................120
SUNROOF
DESCRIPTION
WARNING: Keep fingers and other body parts out
of sunroof opening at all times.
The sun roof features consists of: (Fig. 1)
²Sun roof glass
²Sun roof sun shade
The sunroof power sliding glass panel and sun-
shade can be positioned anywhere along its travel,
rearward of glass panel front edge.
The sunroof is electrically operated from a switch
located in the overhead console. To operate the sun-
roof the ignition switch must be in the Accessory or
On/Run position. Both switchs are a rocker style
design that open or close the sunroof. When pressing
and releasing the open button once, the sunroof will
express open to the comfort stop and the wind deflec-
tor will raise. If the button is pressed a second time,
the sunroof will continue to open to full travel unless
the button is released, at which time it will stop in
that position. Pressing and holding the close button
will close the sunroof. If the close button is released
before the glass fully closes, the sunroof will stop in
that position. The vent switch operates in a similar
manor. The sunroof will also operate for up to fifteen
minutes after the ignition key is turned off for cus-
tomer comfort and convenance while parking.
DIAGNOSIS AND TESTING - SUNROOF
Refer to Sunroof Diagnostic Chart for possible
causes. Before beginning sunroof diagnostics verify
that all other power accessories are in proper operat-
ing condition. If not, a common electrical problem
may exist. Refer to Wiring Diagrams, in this publica-
tion for circuit, splice and component descriptions.
Check the condition of the circuit protection (20 amp
circuit breaker in the Junction Block). Inspect all
wiring connector pins for proper engagement and
continuity. Check for battery voltage at the power
sunroof controller, refer to Wiring Diagrams, for cir-
cuit information. If battery voltage of more than 10
volts is detected at the controller, proceed with the
following tests (the controller will not operate at less
than 10 volts).
Before beginning diagnosis for wind noise or water
leaks, verify that the problem was not caused by
releasing the control switch before the sunroof was
fully closed. The sunroof module has a water-man-
agement system. If however, the sunroof glass is in a
partial closed position, high pressure water may be
forced beyond the water management system bound-
aries and onto the headlining.
RSSUNROOF23 - 113
ProCarManuals.com

conditioner housing. Tighten the screws to 2 N´m (17
in. lbs.).
(6) Reinstall the silencer under the driver side end
of the instrument panel. (Refer to 23 - BODY/IN-
STRUMENT PANEL/INSTRUMENT PANEL
SILENCER - INSTALLATION).
(7) Reconnect the battery negative cable.
(8) Perform the heater-A/C control calibration pro-
cedure. (Refer to 24 - HEATING & AIR CONDITION-
ING/CONTROLS - FRONT/A/C-HEATER CONTROL
- STANDARD PROCEDURE - HEATER-A/C CON-
TROL CALIBRATION).
BLOWER MOTOR RELAY
DESCRIPTION
The blower motor relay (Fig. 6) is a International
Standards Organization (ISO) mini-relay. Relays con-
forming to the ISO specifications have common phys-
ical dimensions, current capacities, terminal
patterns, and terminal functions. The ISO mini-relay
terminal functions are the same as a conventional
ISO relay. However, the ISO mini-relay terminal pat-
tern (or footprint) is different, the current capacity is
lower, and the physical dimensions are smaller than
those of the conventional ISO relay. The blower
motor relay is located in the Intelligent Power Mod-
ule (IPM), which is in the engine compartment near
the battery. See the fuse and relay layout map
molded into the inner surface of the IPM cover for
blower motor relay identification and location.The black, molded plastic case is the most visible
component of the blower motor relay. Five male
spade-type terminals extend from the bottom of the
base to connect the relay to the vehicle electrical sys-
tem, and the ISO designation for each terminal is
molded into the base adjacent to each terminal.
OPERATION
The blower motor relay is an electromechanical
switch that uses a low current input from the Front
Control Module (FCM) to control the high current
output to the blower motor resistor (manual heater-
A/C control) or blower power module (ATC control).
The movable common feed contact point is held
against the fixed normally closed contact point by
spring pressure. When the relay coil is energized, an
electromagnetic field is produced by the coil wind-
ings. This electromagnetic field draws the movable
relay contact point away from the fixed normally
closed contact point, and holds it against the fixed
normally open contact point. When the relay coil is
de-energized, spring pressure returns the movable
contact point back against the fixed normally closed
contact point. The resistor or diode is connected in
parallel with the relay coil in the relay, and helps to
dissipate voltage spikes and electromagnetic interfer-
ence that can be generated as the electromagnetic
field of the relay coil collapses.
The blower motor relay terminals are connected to
the vehicle electrical system through a receptacle in
the Intelligent Power Module (IPM). The inputs and
outputs of the blower motor relay include:
²The common feed terminal (30) receives a bat-
tery current input from the battery through a B(+)
circuit at all times.
²The coil ground terminal (85) receives a ground
input through the front/rear blower motor relay con-
trol circuit only when the FCM electronically pulls
the control circuit to ground.
²The coil battery terminal (86) receives a battery
current input from the battery through a B(+) circuit
at all times.
²The normally open terminal (87) provides a bat-
tery current output to the blower motor resistor
(manual heater-A/C control) or blower power module
(automatic heater-A/C control) through a fuse in the
IPM on the fused front blower motor relay output cir-
cuit only when the blower motor 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 blower motor
relay coil is de-energized.
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details
Fig. 6 Blower Motor Relay
NUMBER IDENTIFICATION
30 COMMON FEED
85 COIL GROUND
86 COIL BATTERY
87 NORMALLY OPEN
87A NORMALLY CLOSED
RSCONTROLS - FRONT24-13
BLEND DOOR ACTUATOR (Continued)
ProCarManuals.com

module, instead of the blower motor resistor. The
blower motor resistor is installed in a mounting hole
in the heater/AC housing, directly behind the glove
box opening of the instrument panel. The resistor
consists of a molded plastic mounting plate with two
integral connector receptacles. Concealed behind the
mounting plate within the heater/AC housing are
four coiled resistor wires contained within a protec-
tive stamped steel cage. The resistor mounting plate
is secured with two screws to the heater/AC housing
and is accessed for service by rolling down the glove
box from the instrument panel.
The blower motor resistor wires will get hot when
in use. Do not touch the resistor wires or the protec-
tive cage if the blower motor has been running. The
blower motor resistor cannot be adjusted or repaired
and, if faulty or damaged, it must be replaced.
OPERATION
The blower motor resistor is connected to the vehi-
cle electrical system through a dedicated take out
and connector of the instrument panel wire harness.
A second connector receptacle receives the pigtail
wire connector from the blower motor. The blower
motor resistor has multiple resistor wires, each of
which will reduce the current flow through the
blower motor to change the blower motor speed. The
blower motor switch in the manual heater-A/C con-
trol directs the ground path for the blower motor
through the correct resistor wire to obtain theselected speed. With the blower motor switch in the
lowest speed position, the ground path for the motor
is applied through all of the resistor wires. Each
higher speed selected with the blower motor switch
applies the blower motor ground path through fewer
of the resistor wires, increasing the blower motor
speed. When the blower motor switch is in the high-
est speed position, the blower motor resistor wires
are bypassed and the blower motor receives a direct
path to ground through the blower motor switch. The
blower motor resistor may be diagnosed using con-
ventional diagnostic tools and methods.
DIAGNOSIS AND TESTING - BLOWER MOTOR
RESISTOR
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
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) Disconnect the instrument panel wire harness
connector for the blower motor resistor and the
blower motor pigtail wire connector from the resistor
connector receptacles.
(3) Check for continuity between each of the
blower motor switch input terminals of the blower
motor resistor and the resistor output terminal. In
each case there should be continuity. If OK, repair
the instrument panel wire harness circuits between
the blower motor switch and the blower motor resis-
tor or the blower motor pigtail wires as required. If
not OK, replace the faulty blower motor resistor.Fig. 9 Blower Motor Resistor
1 - BLOWER MOTOR RESISTOR
2 - INSTRUMENT PANEL WIRE HARNESS
3 - SCREW (2)
4 - GLOVE BOX OPENING LOWER REINFORCEMENT
5 - BLOWER MOTOR PIGTAIL WIRE
6 - EVAPORATOR HOUSING
RSCONTROLS - FRONT24-15
BLOWER MOTOR RESISTOR (Continued)
ProCarManuals.com

DRBIIItscan tool to perform further diagnosis. Refer
to the appropriate diagnostic information.
TESTS
(1) Verify the battery state of charge. (Refer to 8 -
ELECTRICAL/BATTERY SYSTEM/BATTERY -
DIAGNOSIS AND TESTING).
(2) Connect an ammeter (0 to 10 ampere scale
selected) in series with the clutch coil feed terminal.
Connect a voltmeter (0 to 20 volt scale selected) to
measure voltage across the battery and the clutch
coil.
(3) With the heater-A/C control in the A/C mode
and the blower at low speed, start the engine and
allow it to run at a normal idle speed.
(4) The compressor clutch should engage immedi-
ately, and the clutch coil voltage should be within
two volts of the battery voltage. If the coil voltage is
not within two volts of battery voltage, test the
clutch coil feed circuit for excessive voltage drop. If
the compressor clutch does not engage, use a
DRBIIItscan tool to perform further diagnosis. Refer
to the appropriate diagnostic information.
(5) With the ambient temperature at 21É C (70É F),
the compressor clutch coil is acceptable if the current
draw is 2.0 to 3.7 amperes at 11.5 to 12.5 volts at the
clutch coil. If the voltage is more than 12.5 volts, add
electrical loads by turning on electrical accessories
until the voltage reads below 12.5 volts.
(a) If the compressor clutch coil current reading
is zero, the coil is open and must be replaced.
(b) If the compressor clutch coil current reading
is four amperes or more, the coil is shorted and
must be replaced.
COMPRESSOR CLUTCH RELAY
DESCRIPTION
The compressor clutch relay (Fig. 17) is a Interna-
tional Standards Organization (ISO) micro-relay.
Relays conforming to the ISO specifications have
common physical dimensions, current capacities, ter-
minal patterns, and terminal functions. The ISO
micro-relay terminal functions are the same as a con-
ventional ISO relay. However, the ISO micro-relay
terminal pattern (or footprint) is different, the cur-
rent capacity is lower, and the physical dimensions
are smaller than those of the conventional ISO relay.
The compressor clutch relay is located in the Intelli-
gent Power Module (IPM), which is in the engine
compartment near the battery. See the fuse and relay
layout map molded into the inner surface of the IPM
cover for compressor clutch relay identification and
location.The black, molded plastic case is the most visible
component of the compressor clutch relay. Five male
spade-type terminals extend from the bottom of the
base to connect the relay to the vehicle electrical sys-
tem, and the ISO designation for each terminal is
molded into the base adjacent to each terminal.
OPERATION
The compressor clutch relay is an electromechani-
cal switch that uses a low current input from the
Powertrain Control Module (PCM) to control the high
current output to the compressor clutch electromag-
netic coil. The movable common feed contact point is
held against the fixed normally closed contact point
by spring pressure. When the relay coil is energized,
an electromagnetic field is produced by the coil wind-
ings. This electromagnetic field draws the movable
relay contact point away from the fixed normally
closed contact point, and holds it against the fixed
normally open contact point. When the relay coil is
de-energized, spring pressure returns the movable
contact point back against the fixed normally closed
contact point. The resistor or diode is connected in
parallel with the relay coil in the relay, and helps to
dissipate voltage spikes and electromagnetic interfer-
ence that can be generated as the electromagnetic
field of the relay coil collapses.
The compressor clutch relay terminals are con-
nected to the vehicle electrical system through a
receptacle in the Intelligent Power Module (IPM).
The inputs and outputs of the 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.
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
RSCONTROLS - FRONT24-21
COMPRESSOR CLUTCH COIL (Continued)
ProCarManuals.com

The evaporator temperature sensor is a switch that
is installed on the top of the expansion valve in the
right rear corner of the engine compartment (Fig.
18). The sensor has a small probe that is inserted in
a small well in the body of the expansion valve that
is filled with a special silicone-based thermal grease.
A small molded plastic push-in retainer secures the
sensor to a threaded hole in the top surface of the
expansion valve. Two terminals within a molded
plastic connector receptacle on the sensor connect it
to the vehicle electrical system through a take out
and connector of the HVAC wire harness.
The evaporator temperature sensor cannot be
adjusted or repaired and, if faulty or damaged, it
must be replaced.
OPERATION
The evaporator temperature sensor monitors the
temperature of the evaporator through its connection
to the top of the expansion valve. The sensor will
change its internal resistance in response to the tem-
peratures it monitors. The heater-A/C control module
is connected to the sensor through a sensor ground
circuit and a sensor signal circuit. As the evaporator
temperature increases, the resistance of the sensor
decreases and the voltage monitored by the module
decreases. The module uses this monitored voltage
reading to an indication of the evaporator tempera-
ture. The heater-A/C control module is programmed
to respond to this input by sending electronic mes-
sages to the Powertrain Control Module (PCM) over
the Programmable Communications Interface (PCI)
data bus, and the PCM then cycles the air condition-
ing compressor clutch as necessary to optimize air
conditioning system performance and to protect the
system from evaporator freezing. The external loca-
tion of the sensor and the use of a screw allows the
sensor to be removed or installed from the expansion
valve without disturbing the refrigerant in the sys-
tem. The evaporator temperature sensor is diagnosed
using a DRBIIItscan tool. Refer to the appropriate
diagnostic information.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the air cleaner housing from the right
side of the engine compartment.
(3) Remove the windshield wiper assembly from
the vehicle(Refer to 8 - ELECTRICAL/WIPERS/
WASHERS/WIPER MODULE - REMOVAL).
(4) Remove the temperature sensor attaching
screw from the expansion valve.
(5) Pull the evaporator temperature sensor away
from the expansion valve far enough to access the
red release ring on the wiring connector. Push thered ring toward the connector to release lock and
remove the HVAC wire harness connector from the
temperature sensor.
(6) Remove the evaporator temperature sensor
from the engine compartment. Please note that any
grease removed with the old temperature sensor
must be replaced, failure to do so could result in poor
a/c performance.
INSTALLATION
(1) Position the evaporator temperature sensor
into the right rear corner of the engine compartment.
Please make sure any grease removed with the old
sensor has been replaced before the new sensor is
installed, failure to do so could lead to poor a/c per-
formance.
(2) Reconnect the HVAC wire harness connector
for the evaporator temperature sensor to the sensor
connector receptacle.
(3) Position the evaporator temperature sensor
onto the top of the expansion valve with the sensor
probe inserted into the well in the expansion valve.
(4) Install the temperature sensor retaining screw
and tighten.
(5) Install the window wiper assembly to the vehi-
cle(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER MODULE - INSTALLATION).
(6) Reinstall the air cleaner housing into the right
side of the engine compartment.
(7) Reconnect the battery negative cable.
(8) Run the HVAC Cool Down test to verify system
is operating properly(Refer to 24 - HEATING & AIR
CONDITIONING - DIAGNOSIS AND TESTING).
INFRARED TEMPERATURE
SENSOR
DESCRIPTION
The infrared temperature sensor consists of two
infrared transducers that are concealed behind a
clear lens located near the bottom of the center panel
outlet near the top of the instrument panel center
bezel (Fig. 19). These sensors are used only on mod-
els equipped with the optional Automatic Tempera-
ture Control (ATC) heating and air conditioning
system. A molded plastic connector receptacle on the
bottom of the panel outlet unit is concealed behind
the center bezel. A short, dedicated jumper wire har-
ness routed behind the center bezel connects the sen-
sors directly to the ATC heater-A/C control module
near the bottom of the center bezel. The infrared
temperature sensor is integral to the center bezel
panel outlet unit. The infrared sensors cannot be
adjusted or repaired and, if faulty or damaged, the
center bezel panel outlet unit must be replaced.
RSCONTROLS - FRONT24-23
EVAPORATOR TEMPERATURE SENSOR (Continued)
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trol circuit only when the FCM electronically pulls
the control circuit to ground.
²The coil battery terminal (86) receives a battery
current input from the battery through a B(+) circuit
at all times.
²The normally open terminal (87) provides a bat-
tery current output to the blower motor resistor
(manual heater-A/C control) or blower power module
(automatic heater-A/C control) through a fuse in the
IPM on the fused rear blower motor relay output cir-
cuit only when the blower motor 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 blower motor
relay coil is de-energized.
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
pin-out and location views for the various wire har-
ness connectors, splices, and grounds.
DIAGNOSIS AND TESTING - BLOWER MOTOR
RELAY
The rear blower motor relay (Fig. 6) is located in
the Intelligent Power Module (IPM), which is in the
engine compartment near the battery. See the fuse
and relay layout map molded into the inner surface
of the IPM cover for rear blower motor relay identi-
fication and location. Remove the relay from the IPM
to perform the following tests:(1) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 2. If not OK, replace the faulty relay.
(2) Resistance between terminals 85 and 86 (elec-
tromagnet) should be 75   5 ohms. If OK, go to Step
3. If not OK, replace the faulty relay.
(3) Connect a battery to terminals 85 and 86.
There should now be continuity between terminals
30 and 87, and no continuity between terminals 87A
and 30. If OK, use a DRBIIItscan tool to perform
further diagnosis of the relay circuits. Refer to the
appropriate diagnostic information. If not OK,
replace the faulty relay.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Unlatch and remove the cover from the Intelli-
gent Power Module (IPM) (Fig. 7).
(3) See the fuse and relay layout map molded into
the inner surface of the IPM cover for rear blower
motor relay identification and location.
(4) Remove the rear blower motor relay from the
IPM.
INSTALLATION
(1) See the fuse and relay layout map molded into
the inner surface of the Intelligent Power Module
Fig. 6 Blower Motor Relay
NUMBER IDENTIFICATION
30 COMMON FEED
85 COIL GROUND
86 COIL GROUND
87 NORMALLY OPEN
87A NORMALLY CLOSED
Fig. 7 Intelligent Power Module
1 - BATTERY THERMAL GUARD
2 - INTELLIGENT POWER MODULE
3 - FRONT CONTROL MODULE
RSCONTROLS - REAR24-33
BLOWER MOTOR RELAY (Continued)
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