abs JEEP LIBERTY 2002 KJ / 1.G Workshop Manual

REMOVAL
IGNITION SWITCH REMOVAL
The ignition key must be in the key cylinder for
cylinder removal. The key cylinder must be removed
first before removing ignition switch.
(1) Remove lower steering column cover screws
and remove cover.
(2) Remove lock cylinder.(Refer to 19 - STEERING/
COLUMN/KEY/LOCK CYLINDER - REMOVAL).
(3) Remove the multi-function switch.
(4) Disconnect the electrical connector at the rear
of the ignition switch.
(5) Remove the ignition switch mounting screw
(Fig. 7). Use tamper proof torx bit to remove the
screw.
(6) Pull the ignition switch straight out to remove
from the locking tabs (Fig. 8)
INSTALLATION
IGNITION SWITCH INSTALLATION
The ignition key must be in the key cylinder for
cylinder installation. The key cylinder must be
aligned with the ignition switch for installation.
(1) Before installing ignition switch, rotate the slot
in the switch to the ON position (Fig. 9).
(2) Connect the electrical connector to rear of igni-
tion switch. Make sure that locking tab is fully
seated into wiring connector.
(3) Position the switch to the column and install
tamper proof screw. Tighten screw to 2 N´m (17 in.
lbs.).(4) Install the lock cylinder (Refer to 19 - STEER-
ING/COLUMN/KEY/LOCK CYLINDER - INSTALLA-
TION).
(5) Test the operation of the lock cylinder for
smooth rotating.
(6) Install the multi-function switch.
(7) Install steering column lower cover.
Fig. 7 IGNITION SWITCH MOUNTING SCREW
1 - Tamper Proof Torx Screw
2 - Ignition Switch
Fig. 8 IGNITION SWITCH TABS
1 - Ignition Switch
2 - Locking Tabs
Fig. 9 IGNITION SWITCH ON POSITION
1 - Ignition Switch
2 - Rotate to On Position
KJCOLUMN 19 - 9
IGNITION SWITCH (Continued)

SPECIAL TOOLS
POWER STEERING PUMP
FLUID COOLER
DESCRIPTION
The power steering fluid cooler is located at the
front of the vehicle. It is mounted to the radiator
lower support just forward of the air-conditioning
condenser and just rearward of the front fascia. The
cooler is positioned so it is in the air flow through the
front fascia of the vehicle (Fig. 5)
OPERATION
The purpose of the power steering fluid cooler is to
keep the temperature of the power steering system
fluid from rising to a level that would affect the per-
formance of the power steering system.
The cooler used on this vehicle is referred to as a
fluid-to-air type cooler. This means that the air flow
across the fin/tubes of the cooler is used to extract
the heat from the cooler which it has absorbed from
the power steering fluid flowing through it. The
cooler is placed in series with the power steering
fluid return line, between the steering gear and the
power steering fluid reservoir. This lowers the tem-
perature of the power steering fluid prior to it enter-
ing the power steering fluid reservoir where it is
resupplied to the power steering pump.
REMOVAL
(1) Remove the return line at the gear.
(2) Remove the return line at the reservoir.
(3) Remove the grille (Refer to 23 - BODY/EXTE-
RIOR/GRILLE - REMOVAL).
(4) Remove the two cooler mounting bolts. (Fig. 5)
(5) Remove the cooler from the vehicle.
INSTALLATION
(1) Install the cooler to the vehicle.
(2) Install the two cooler mounting bolts. (Fig. 5).
(3) Install the grille (Refer to 23 - BODY/EXTERI-
OR/GRILLE - INSTALLATION).
(4) Install the return line at the reservoir.
(5) Install the return line at the gear.
(6) Refill the power steering fluid and check for
leaks (Refer to 19 - STEERING/PUMP - STANDARD
PROCEDURE).
Analyzer Set, Power Steering Flow/Pressure 6815
Adapters, Power Steering Flow/Pressure Tester
6893
Puller C-4333
Installer, Power Steering Pulley C-4063B
Fig. 5 FLUID COOLER
1 - FLUID COOLER
2 - MOUNTING BOLTS
19 - 20 PUMPKJ
PUMP (Continued)

(4) Clean adhesive residue from body with MOPAR
Super Clean solvent or equivalent.
INSTALLATION
(1) Remove protective cover from adhesive tape on
back of emblem.
(2) Position emblem properly on body.
(3) Press emblem firmly to body with palm of
hand.
(4) If temperature is below 21ÉC (70ÉF) warm
emblem with a heat lamp or gun to assure adhesion.
Do not exceed 52ÉC (120ÉF) when heating emblem.
FRONT FENDER
REMOVAL
(1) Remove the wheel opening splash shield. (Refer
to 23 - BODY/EXTERIOR/FRONT WHEELHOUSE
SPLASH SHIELD - REMOVAL)
(2) Remove the fascia assembly. (Refer to 13 -
FRAME & BUMPERS/BUMPERS/FRONT FASCIA -
REMOVAL)
(3) Remove the fender support bracket bolts. (Fig.
1)
(4) Remove the bolts and remove the fender. (Fig.
2)
INSTALLATION
(1) Install the fender assembly and install the
bolts
(2) Install the fender support bracket and install
the bolts.(3) Align the fender with adjacent body parts and
tighten the bolts to 12 N´m (9 ft. lbs.). (Refer to 23 -
BODY/BODY STRUCTURE/GAP AND FLUSH -
SPECIFICATIONS)
(4) Install the fascia assembly. (Refer to 13 -
FRAME & BUMPERS/BUMPERS/FRONT FASCIA -
INSTALLATION)
(5) Install the wheelhouse splash shield. (Refer to
23 - BODY/EXTERIOR/FRONT WHEELHOUSE
SPLASH SHIELD - INSTALLATION)
FUEL FILL DOOR/HOUSING
REMOVAL
(1) Remove the fuel cap.
(2) Remove the three screws connecting the fuel
door/housing to the filler neck.
(3) Reach in through the opening and depress the
tabs at the upper and bottom right of the door/hous-
ing. (Fig. 3)
(4) Remove the fuel door/housing from the vehicle.
INSTALLATION
(1) Position the fuel filler door/housing into the
vehicle and fully seat the tabs.
Fig. 1 FENDER SUPPORT BRACKET
1 - FENDER BOLTS (2)
2 - FENDER
3 - FENDER SUPPORT BRACKET
4 - SUPPORT BRACKET BOLTS (2)
5 - U-NUTS (2)
Fig. 2 FRONT FENDER
1 - HYDRAFORM
2 - U-NUTS
3 - BOLTS (3)
4 - FENDER
5 - BOLTS (2)
6 - BOLTS (2)
KJEXTERIOR 23 - 141
EXTERIOR NAME PLATES (Continued)

(2) Install the three screws.
(3) Install the fuel cap.
GRILLE
REMOVAL
(1) Remove the upper screws. (Fig. 4)
(2) Roll the grille forward and disengage the two
grille hooks under the headlamp units.
(3) Lift the grille forward and up off of the location
tabs at the bottom and remove.
INSTALLATION
(1) Install the grille onto the locating tabs at the
bottom.
(2) Push the grille back and snap into the hooks in
the grille opening reinforcement.
(3) Check that the black welts at the outboard
ends of the grille have a uniform appearance relative
to the fender and install the screws.
GRILLE OPENING
REINFORCEMENT
REMOVAL
(1) Remove the grille. (Refer to 23 - BODY/EXTE-
RIOR/GRILLE - REMOVAL)
(2) Remove the front fascia. (Refer to 13 - FRAME
& BUMPERS/BUMPERS/FRONT FASCIA -
REMOVAL)
(3) Disconnect the electrical connectors. (Fig. 5)
(4) Disconnect the rubber side flap push pin con-
nectors.
(5) Remove the seven bolts and remove the grille
opening reinforcement.
(6) Disconnect the headlamp units electrical con-
nectors.
(7) Remove the headlamp units. (Refer to 8 -
ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/
HEADLAMP UNIT - REMOVAL)
INSTALLATION
(1) Install the headlamp units. (Refer to 8 - ELEC-
TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD-
LAMP UNIT - INSTALLATION)
(2) Connect the headlamp unit electrical connec-
tors.
(3) Install the grille opening reinforcement and
install the seven bolts.
(4) Connect the rubber side flap and install the
push pin connectors.
(5) Connect the electrical connectors. (Fig. 5)
(6) Install the front fascia. (Refer to 13 - FRAME
& BUMPERS/BUMPERS/FRONT FASCIA - INSTAL-
LATION)
(7) Install the grille. (Refer to 23 - BODY/EXTERI-
OR/GRILLE - INSTALLATION)
Fig. 3 FUEL FILL DOOR/HOUSING
1 - FUEL FILL DOOR
2 - HOUSING TABS
Fig. 4 GRILLE
1 - GRILLE OPENING REINFORCEMENT
2 - SCREWS (4)
3 - GRILLE CLIPS
23 - 142 EXTERIORKJ
FUEL FILL DOOR/HOUSING (Continued)

GLOVE BOX
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Open the glove box.
(2) Squeeze the stop tabs located on the sides of
the box and allow the box to open fully.
(3) With box in the full down position slide the box
to the right off of the hinges and remove.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Position the box on and slide the box to the left
to engage the hinges.
(2) Close the glove box.
GLOVE BOX LATCH
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERYNEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Remove the glove box. (Refer to 23 - BODY/IN-
STRUMENT PANEL/GLOVE BOX - REMOVAL)
(2) Remove the nine screws and remove the glove
box skin.
(3) Remove the latch from the locators.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Position the latch onto the locators.
(2) Install the glove box skin onto the glove box
and install the nine screws.
(3) Install the glove box. (Refer to 23 - BODY/IN-
STRUMENT PANEL/GLOVE BOX - INSTALLA-
TION)
GLOVE BOX LATCH STRIKER
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
23 - 148 INSTRUMENT PANELKJ

GLASS PANEL
REMOVAL
(1) Slide sunshade rearward to the open position.
(2) Move the glass panel to the closed position.
(3) Remove the four glass panel screws (Fig. 1).
(4) Lift off glass panel and remove from vehicle.
INSTALLATION
(1) Position glass panel on to mechanism lift arm.
(2) Start the four attaching screws.
(3) Center glass in opening by running a business
card around the glass.
(4) Adjust glass panel. (Refer to 23 - BODY/SUN-
ROOF/GLASS PANEL - ADJUSTMENTS)
ADJUSTMENTS
SUNROOF GLASS PANEL ADJUSTMENT
(1) Move the sunshade rearward to the open posi-
tion.
(2) Move the sunroof glass panel to the fully closed
position.
(3) Adjust the glass one corner at a time.
(a) Loosen four glass screws (Fig. 2).
(b) Lift glass assembly and align the top of the
glass panel to the top of the roof panel.
(c) Tighten screw to 3.5 N´m (31 in. lbs.).
(d) Repeat steps a. and b. for each corner of the
glass panel.
(e) When properly adjusted, the front of the
glass panel is 1.75 mm (0.07 in.) to 2.75 mm (0.11
in.) lower than the roof surface and the rear edgeof the glass panel is 1.75mm (0.07 in.) to .75 mm
(0.03 in.) lower than the roof surface.
NOTE: Glass assembly seal is 2.5mm (0.1 in) higher
than the glass panel. Measure at 300mm (11.8 in)
outboard of the centerline of the vehicle.
(4) Verify sunroof operation and alignment. Check
fit and re-adjust as necessary.
GLASS PANEL SEAL
REMOVAL
(1) Remove sunroof glass panel. (Refer to 23 -
BODY/SUNROOF/GLASS PANEL - REMOVAL)
(2) Place glass panel on clean work area with the
top side up. Support the glass assembly from under-
side to avoid bending or otherwise damaging the
mounting tabs.
(3) Grasp the seal and pull seal away from the
glass panel. The seal is a one piece seal.
INSTALLATION
NOTE: Always position seal seam on center of the
passenger side of glass panel.
(1) Place seal into position.
(2) Install seal on glass. Using care working the
seal around the glass, being careful not to over
stretch the seal while installing.
(3) Install the glass panel. (Refer to 23 - BODY/
SUNROOF/GLASS PANEL - INSTALLATION)
Fig. 1 GLASS PANEL
1 - SCREWS
2 - GLASS PANEL
3 - MODULE ASSEMBLYFig. 2 GLASS PANEL
1 - SCREWS
2 - GLASS PANEL
3 - MODULE ASSEMBLY
23 - 178 SUNROOFKJ

CONTROL SWITCH
DESCRIPTION
Vehicles equipped with a power sunroof utilize an
sunroof control switch. On this model, the sunroof
control switch is located in the overhead console, in
between the two reading lamps. The switch is
mounted in the overhead console with four plastic
retaining tabs, molded into the switch housing.
This switch incorporates four selections of opera-
tion open, auto open, close and vent. The individual
switches in the sunroof control switch unit cannot be
repaired. If one switch is damaged or faulty, the
entire sunroof control switch unit must be replaced.
OPERATION
With the operation of the sunroof control switch,
voltage is directed to the sunroof motor, through the
switch contacts or control module. If the control
switch is depressed and held depressed the voltage
signal is controlled manually through the switch con-
tacts, so when the switch is released the sunroof
stops.
Refer to the owners manual for more information
on the operation of the sunroof switch and system.
DIAGNOSIS AND TESTING
The following test will determine if the sunroof
control switch is operating properly.
(1) Remove the overhead console from the head-
liner (Refer to 8 - ELECTRICAL/OVERHEAD CON-
SOLE - REMOVAL).
(2) Remove the sunroof control switch from the
overhead console (Refer to 23 - BODY/SUNROOF/
CONTROL SWITCH - REMOVAL).
(3) Using an ohmmeter, test the switch terminals
for proper continuity using the table below. If any ofthe terminals do not show proper continuity, replace
the sunroof control switch.
SWITCH POSITION
(DEPRESSED)CONTINUITY BETWEEN
TERMINALS
VENT (V) 3, 4
OPEN (AUTO) 1, 4
CLOSE 2, 4
REMOVAL
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the overhead console from the head-
liner (Refer to 8 - ELECTRICAL/OVERHEAD CON-
SOLE - REMOVAL).
(3) Disconnect the sunroof control switch electrical
connector. Depress the connector retaining tab and
pull the connector straight out.
(4) To remove the switch from the overhead con-
sole, push on the back of the switch until it comes
free from the overhead console.
INSTALLATION
(1) Install the switch in the overhead console
assembly. Be certain the switch is securely snapped
in place.
(2) Connect the sunroof control switch electrical
connector. Be certain the switch connector is securely
snapped in place.
(3) Install the overhead console (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - INSTALLA-
TION).
(4) Connect the negative battery cable.
23 - 184 SUNROOFKJ

(4) When installing a new weatherstrip on the rear
door opening, remove the tear strip starting at the
splice and moving around the back of the door to the
front of the opening.
DOOR LOWER WEATHERSTRIP
REMOVAL
(1) Carefully disengage the push pin fasteners and
remove the seal.
INSTALLATION
(1) Position the seal and seat the push pin fasten-
ers.
FRONT DOOR OUTER BELT
MOLDING
REMOVAL
(1) Lower the window.
(2) Pull the outer belt molding off of the door
flange starting at the rear and moving forward.
INSTALLATION
(1) Press the belt molding onto the outer door win-
dow flange starting at the rear and working forward.
SWING GATE BELTLINE
WEATHERSTRIP
REMOVAL
(1) Remove the swing gate trim panel. (Refer to 23
- BODY/SWING GATE/TRIM PANEL - REMOVAL)
(2) Pull seal away from the corner tabs and
remove from the swing gate flange.
INSTALLATION
(1) Install the seal over the swing gate flange and
seat the corner tabs.
(2) Install the swing gate trim panel. (Refer to 23 -
BODY/SWING GATE/TRIM PANEL - INSTALLA-
TION)
SWING GATE OPENING
WEATHERSTRIP
REMOVAL
(1) Open the swing gate and peal seal off of the
gate opening flange.
INSTALLATION
(1) Position the seal to the bottom of the gate
opening starting the installation at the center of the
flange. Press the seal onto the sill flange and work
around the perimeter of the door opening until fully
seated. Work in one direction, smoothing the seal to
avoid puckers or wrinkles.
REAR DOOR OUTER BELT
MOLDING
REMOVAL
(1) Lower the window.
(2) Pull the outer belt molding off of the door
flange starting at the rear and moving forward.
INSTALLATION
(1) Press the belt molding onto the outer door win-
dow flange starting at the front and working back.
SIDE RAIL WEATHERSTRIP/
RETAINER
REMOVAL
(1) Remove the windshield weatherstrip retainer.
(Refer to 23 - BODY/WEATHERSTRIP/SEALS/
WINDSHIELD A-PILLAR WEATHERSTRIP/RE-
TAINER - REMOVAL)
(2) Remove the two screws.
(3) Using a trim stick C-4755 or equivalent,
release the push in fasteners and remove the weath-
erstrip.
INSTALLATION
(1) Position the weatherstrip and seat the push in
fasteners.
(2) Install the two screws.
(3) Install the windshield weatherstrip. (Refer to
23 - BODY/WEATHERSTRIP/SEALS/WINDSHIELD
A-PILLAR WEATHERSTRIP/RETAINER - INSTAL-
LATION)
WINDSHIELD A-PILLAR
WEATHERSTRIP/RETAINER
REMOVAL
(1) Open the doors and peal the a-pillar seal away
from the a-pillar/windshield and the side rail
weather strip flanges.
(2) Remove the seven screws and remove the
weatherstrip.
23 - 186 WEATHERSTRIP/SEALSKJ
DOOR PRIMARY WEATHERSTRIP (Continued)

DESCRIPTION - REFRIGERANT SYSTEM
SERVICE PORT
The two refrigerant system service ports are used
to charge, recover/recycle, evacuate, and test the air
conditioning refrigerant system. Unique service port
coupler sizes are used on the R-134a system, to
ensure that the refrigerant system is not accidentally
contaminated by the use of the wrong refrigerant
(R-12), or refrigerant system service equipment.
OPERATION
OPERATION - HEATER AND AIR CONDITIONER
The heater and optional air conditioner are blend-
air type systems. In a blend-air system, a blend door
controls the amount of unconditioned air (or cooled
air from the evaporator on models with air condition-
ing) that is allowed to flow through, or around, the
heater core. A temperature control knob on the A/C
Heater control panel determines the discharge air
temperature by controlling an electric actuator,
which moves the blend door. This allows an almost
immediate control of the output air temperature of
the system.
The mode control knob on the heater-only or A/C
Heater control panel is used to direct the conditioned
air to the selected system outlets. Both mode control
switches use engine vacuum to control the mode
doors, which are operated by vacuum actuators.
On all vehicles, the outside air intake can be shut
off by selecting the Recirculation Mode with the
mode control knob. This will operate a vacuum actu-
ated recirculation door that closes off the outside
fresh air intake and recirculates the air that is
already inside the vehicle.
The optional air conditioner for all models is
designed for the use of non-CFC, R-134a refrigerant.
The air conditioning system has an evaporator to cool
and dehumidify the incoming air prior to blending it
with the heated air. This air conditioning system
uses a fixed orifice tube in the liquid line near the
condenser outlet tube to meter refrigerant flow to the
evaporator coil. To maintain minimum evaporator
temperature and prevent evaporator freezing, the
A/C low pressure switch on the accumulator cycles
the compressor clutch.
OPERATION - REFRIGERANT SYSTEM SERVICE
PORT
The high pressure service port is located on the
refrigerant line, near the discharge port of the com-
pressor. The low pressure service port is located on
the liquid line at the side of the engine compartment,
near the condensor.Each of the service ports has a threaded plastic
protective cap installed over it from the factory. After
servicing the refrigerant system, always reinstall
both of the service port caps.
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - A/C
PERFORMANCE
The air conditioning system is designed to provide
the passenger compartment with low temperature
and low humidity air. The evaporator, located in the
HVAC housing on the dash panel below the instru-
ment panel, is cooled to temperatures near the freez-
ing point. As warm damp air passes through the
cooled evaporator, the air transfers its heat to the
refrigerant in the evaporator and the moisture in the
air condenses on the evaporator fins. During periods
of high heat and humidity, an air conditioning sys-
tem will be more effective in the Recirculation Mode.
With the system in the Recirculation Mode, only air
from the passenger compartment passes through the
evaporator. As the passenger compartment air dehu-
midifies, the air conditioning system performance
levels improve.
Humidity has an important bearing on the temper-
ature of the air delivered to the interior of the vehi-
cle. It is important to understand the effect that
humidity has on the performance of the air condition-
ing system. When humidity is high, the evaporator
has to perform a double duty. It must lower the air
temperature, and it must lower the temperature of
the moisture in the air that condenses on the evapo-
rator fins. Condensing the moisture in the air trans-
fers heat energy into the evaporator fins and tubing.
This reduces the amount of heat the evaporator can
absorb from the air. High humidity greatly reduces
the ability of the evaporator to lower the temperature
of the air.
However, evaporator capacity used to reduce the
amount of moisture in the air is not wasted. Remov-
ing some of the moisture out of the air entering the
vehicle adds to the comfort of the passengers.
Although, an owner may expect too much from the
air conditioning system on humid days. A perfor-
mance test is the best way to determine whether the
system is performing up to standard. This test also
provides valuable clues as to the possible cause of
trouble with the air conditioning system.
Before proceeding, (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNING) and
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - CAUTION). The air temperature in
the test room and in the vehicle must be a minimum
of 21É C (70É F) for this test.
24 - 2 HEATING & AIR CONDITIONINGKJ
HEATING & AIR CONDITIONING (Continued)

(2) Install and tighten the a/c low pressure switch
on the accumulator fitting. The switch should be
hand-tightened onto the accumulator fitting.
(3) Plug the wire harness connector into the a/c
low pressure switch.
(4) Connect the battery negative cable.
BLEND DOOR ACTUATOR
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 AN ACCIDENTAL
AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove A/C housing from vehicle(Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - REMOVAL).
(3) Remove the screws that secure the blend door
actuator to the top of the HVAC housing. (Fig. 14).
(4) Remove the blend door actuator.
INSTALLATION
(1) Install the blend door actuator in place.
(2) Install and tighten the screws that secure the
blend door actuator to the housing. Tighten the
mounting screws to 2.4 ( .34) N´m (21 ( 3) in. lbs.).
(3) Install the HVAC housing into the vehicle(Re-
fer to 24 - HEATING & AIR CONDITIONING/DIS-
TRIBUTION/HVAC HOUSING - INSTALLATION).
(4) Install the blend door actuator electrical con-
nector from the wiring harness through the glove
box.
(5) Connect the battery negative cable.
BLOWER MOTOR RELAY
DESCRIPTION
The blower motor relay is a International Stan-
dards Organization (ISO)-type relay. The relay is a
electromechanical device that switches battery cur-
rent from a fuse in the Power Distribution Center
(PDC) directly to the blower motor. The relay is ener-
gized when the relay coil is provided a voltage signal
by the ignition switch. (Refer to 24 - HEATING &
AIR CONDITIONING/CONTROLS/BLOWER
MOTOR RELAY - DIAGNOSIS AND TESTING)
OPERATION
The blower motor relay is installed in a wire har-
ness connector that is secured to the passenger side
outboard end of the HVAC housing in the passenger
compartment, next to the HVAC wire harness con-
nector.
The blower motor relay cannot be repaired and, if
faulty or damaged, it must be replaced.
Fig. 14 HEATER CORE REMOVAL/INSTALLATION
1 - HEATER CORE
2- MOUNTING SCREW HOLE
3- INLET AND OUTLET TUBES
4- VACUUM HARNESS
5- ACTUATOR SCREWS (3)
6- ELECTRIC BLEND DOOR ACTUATOR
7- MOUNTING SCREW HOLE
8- HEATER CORE RETAINER TABS (4)
24 - 20 CONTROLSKJ
A/C LOW PRESSURE SWITCH (Continued)