8 - electrical JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual

STEERING COLUMN OPENING
COVER
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 fuse cover from the Junction Block
(JB) and Body Control Module (BCM) unit under the
driver side outboard end of the instrument panel.
(Refer to 8 - ELECTRICAL/POWER DISTRIBU-
TION/FUSE COVER - REMOVAL).
(3) Remove the cluster bezel from the instrument
panel. (Refer to 23 - BODY/INSTRUMENT PANEL/
CLUSTER BEZEL - REMOVAL).
(4) Remove the one screw that secures the out-
board end of the steering column opening cover to
the U-nut on the outboard end of the instrument
panel top pad (Fig. 39).
(5) Remove the two screws that secure the lower
edge of the steering column opening cover to the
U-nuts on the instrument panel steering column sup-
port bracket.
(6) Pull the steering column opening cover rear-
ward to disengage the three snap clips (one outboard
and two inboard) that secure it to the receptacles in
the instrument panel.
(7) Remove the steering column opening cover
from the instrument panel.
INSTALLATION
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. THISIS 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) Position the steering column opening cover
onto the instrument panel (Fig. 39).
(2) Align the three snap clips on the steering col-
umn opening cover with their receptacles in the
instrument panel.
(3) Using hand pressure, press firmly and evenly
on the steering column opening cover over the snap
clip locations until each of the snap clips is fully
engaged in its receptacle.
(4) Install and tighten the two screws that secure
the lower edge of the steering column opening cover
to the instrument panel steering column support
bracket. Tighten the screws to 2.2 N´m (20 in. lbs.).
(5) Install and tighten the one screw that secures
the outboard end of the steering column opening
cover to the U-nut on the outboard end of the instru-
ment panel top pad. Tighten the screw to 2.2 N´m (20
in. lbs.).
(6) Reinstall the cluster bezel onto the instrument
panel. (Refer to 23 - BODY/INSTRUMENT PANEL/
CLUSTER BEZEL - INSTALLATION).
(7) Reinstall the fuse cover onto the Junction
Block (JB) and Body Control Module (BCM) unit
under the driver side outboard end of the instrument
panel. (Refer to 8 - ELECTRICAL/POWER DISTRI-
BUTION/FUSE COVER - INSTALLATION).
(8) Reconnect the battery negative cable.
Fig. 39 Steering Column Opening Cover Remove/
Install
1 - INSTRUMENT PANEL TOP PAD
2 - STEERING COLUMN OPENING COVER
3 - SCREW (3)
23 - 68 INSTRUMENT PANEL SYSTEMWJ

(4) Install screw attaching B-pillar lower trim to
B-pillar.
(5) Install screw attaching front of B-pillar lower
trim to floor.
(6) Install screw attaching front of quarter panel
trim to floor.
(7) Install front seat shoulder belt anchor bolt.
(8) Install front seat shoulder belt height adjust-
ment knob and turning loop.
(9) Install front door sill trim (Refer to 23 - BODY/
INTERIOR/DOOR SILL TRIM - INSTALLATION).
B-PILLAR UPPER TRIM
REMOVAL
(1) Remove shoulder belt height adjustment knob.
(2) Remove front seat belt turning loop.
(3) Remove the screw attaching lower B pillar
trim.
(4) Pull lower B pillar trim out far enough to
remove upper trim panel.
(5) Grasp upper B-pillar trim and pull outward to
detach from B-pillar (Fig. 2).
INSTALLATION
(1) Position trim panel on B-pillar (Fig. 2).
(2) Ensure trim panel covers inner edge of door
opening weatherstrip and press inward to seat.
(3) Install screw attaching lower B pillar trim
panel.
(4) Install front seat belt turning loop.
(5) Install shoulder belt height adjustment knob.
CARPETS AND FLOOR MATS
REMOVAL
REMOVAL - FRONT CARPET
(1) Remove door sill trim (Refer to 23 - BODY/IN-
TERIOR/DOOR SILL TRIM - REMOVAL).
(2) Remove the B-pillar lower trim, refer to (Refer
to 23 - BODY/INTERIOR/B-PILLAR LOWER TRIM -
REMOVAL).
(3) Remove front seats (Refer to 23 - BODY/
SEATS/SEAT - REMOVAL).
(4) Remove the rear seats lower cushions (Refer to
23 - BODY/SEATS/SEAT CUSHION - REMOVAL).
(5) Remove center floor console (Refer to 23 -
BODY/INTERIOR/FLOOR CONSOLE - REMOVAL).
(6) Remove any other interfering trim or molding.
(7) Lift carpet and mat from floor panel.
REMOVAL - CARGO AREA CARPET
(1) Lift tailgate.
(2) Fold rear seat cushions forward.
(3) Remove rear seat backs (Refer to 23 - BODY/
SEATS/REAR SEAT BACK - REMOVAL).
(4) Remove the rear shoulder belts (Refer to 8 -
ELECTRICAL/RESTRAINTS/REAR SEAT BELT &
RETRACTOR - REMOVAL).
(5) Remove the retractable security cargo cover
assembly.
(6) Remove the spare tire cover.
(7) Remove the rear cargo tie down footman loops.
The side mounted footman loops are retained by
screws. The floor footman loops are riveted (Fig. 3).
(8) Remove the C pillar trim (Refer to 23 - BODY/
INTERIOR/C-PILLAR TRIM - REMOVAL).
(9) Remove the CD changer, if equipped (Refer to 8
- ELECTRICAL/AUDIO/CD CHANGER - REMOV-
AL).
(10) Remove the Infinity amp, if equipped (Refer to
8 - ELECTRICAL/AUDIO/AMPLIFIER - REMOVAL).
(11) Lift the carpet.
INSTALLATION
INSTALLATION - FRONT CARPET
(1) Carefully lay the carpet and mat on the floor
panel. Align the carpet to allow installation of the
components fastened to the floor panel.
(2) Install the center console (Refer to 23 - BODY/
INTERIOR/FLOOR CONSOLE - INSTALLATION).
(3) Install the front seats (Refer to 23 - BODY/
SEATS/SEAT - INSTALLATION).
(4) Install the rear seat cushions (Refer to 23 -
BODY/SEATS/SEAT CUSHION - INSTALLATION).
Fig. 3 Cargo Area Carpet
1 - CARGO AREA CARPET
2 - RIVET
3 - CARGO TIE-DOWN LOOP
WJINTERIOR 23 - 71
B-PILLAR LOWER TRIM (Continued)

(5) Install the lower B pillar trim (Refer to 23 -
BODY/INTERIOR/B-PILLAR LOWER TRIM -
INSTALLATION).
(6) Install the door sill trim (Refer to 23 - BODY/
INTERIOR/DOOR SILL TRIM - INSTALLATION).
(7) Install any other moldings or trim panels
removed.
INSTALLATION - CARGO AREA CARPET
(1) Thoroughly clean the area with Mopar Super
Kleent, or equivalent.
(2) Lay the new carpet in.
(3) Install the ªCº pillar trim (Refer to 23 - BODY/
INTERIOR/C-PILLAR TRIM - INSTALLATION).
(4) Install the CD changer, if equipped (Refer to 8 -
ELECTRICAL/AUDIO/CD CHANGER - INSTALLA-
TION).
(5) Install the footman loops (Fig. 3).
(6) Install the rear shoulder belts (Refer to 8 -
ELECTRICAL/RESTRAINTS/REAR SEAT BELT &
RETRACTOR - INSTALLATION).
(7) Install the rear seat backs (Refer to 23 -
BODY/SEATS/REAR SEAT BACK - INSTALLA-
TION).
(8) Install the Infinity amp, if equipped (Refer to 8
- ELECTRICAL/AUDIO/AMPLIFIER - INSTALLA-
TION).
(9) Install the spare tire cover.
(10) Install the retractable security cover.
COWL TRIM
REMOVAL
(1) Remove front door sill trim (Refer to 23 -
BODY/INTERIOR/DOOR SILL TRIM - REMOVAL).
(2) Remove screws attaching cowl trim to floor.
(3) Remove plastic nut.
(4) Grasp cowl trim and pull outward to separate
from clip.
(5) Separate cowl trim from vehicle.
INSTALLATION
(1) Position cowl trim and press into place.
(2) Install screws attaching cowl trim to floor.
(3) Install plastic nut.
(4) Install front door sill trim (Refer to 23 - BODY/
INTERIOR/DOOR SILL TRIM - INSTALLATION).
C-PILLAR TRIM
REMOVAL
(1) Remove rear shoulder belt turning loop.
(2) Remove rear shoulder belt height adjustment
knob.
(3) Remove screws attaching quarter panel trim.
(4) Pull quarter panel trim outward as necessary.
(5) Grasp C-pillar upper trim and pull outward to
disengage from C-pillar (Fig. 4).
(6) Route rear shoulder belt through access hole.
(7) Separate C-pillar upper trim from vehicle.
INSTALLATION
(1) Position C-pillar upper trim at C-pillar (Fig. 4).
(2) Route rear shoulder belt through access hole.
(3) Press C-pillar upper trim onto C-pillar.
(4) Press quarter panel trim into place as neces-
sary.
(5) Ensure front edge of trim is covered by weath-
erstrip.
(6) Install screws attaching quarter panel trim.
(7) Install rear shoulder belt height adjustment
knob.
(8) Install rear shoulder belt turning loop.
23 - 72 INTERIORWJ
CARPETS AND FLOOR MATS (Continued)

HEADLINER
REMOVAL
CAUTION: The headliner is a one-piece, molded
component. It has limited flexibility and must not be
bent. Damage may possibly result.
(1) Record radio presets and disconnect negative
battery cable.
(2) Remove A pillar trim moldings (Refer to 23 -
BODY/INTERIOR/A-PILLAR TRIM - REMOVAL).
(3) Remove B pillar upper trim moldings (Refer to
23 - BODY/INTERIOR/B-PILLAR UPPER TRIM -
REMOVAL).
(4) Remove C pillar trim moldings (Refer to 23 -
BODY/INTERIOR/C-PILLAR TRIM - REMOVAL).
(5) Remove D pillar trim molding (Refer to 23 -
BODY/INTERIOR/D-PILLAR TRIM - REMOVAL).
(6) Remove the sun visors (Refer to 23 - BODY/IN-
TERIOR/SUN VISOR - REMOVAL).
(7) Disconnect the vanity lamp electrical connector.
(8) Remove assist handles from roof rails (Refer to
23 - BODY/INTERIOR/ASSIST HANDLE - REMOV-
AL).
(9) Remove dome lamp and overhead console, if
equipped.
(10) Remove rear cargo/dome lamp.
(11) Remove sun roof pinch welt, if equipped.
(12) Disengage rear washer hose from liftgate (Fig.
9).
(13) Disengage the wire harness connectors at rear
of headliner.
(14) Disconnect the rear washer hose at the left
ªAº pillar (Fig. 10).
(15) Disengage the wire harness for the sunroof, if
equipped.
(16) Fold down the rear seats, move the front seats
full forward, and lower the front seat backs.
(17) Partially lower the headliner and disengage
the sunroof drain hoses, if equipped (Fig. 11).
(18) With the aid of an assistant, remove the head-
liner through the liftgate opening.
INSTALLATION
(1) With the aid of an assistant, position the head-
liner in the vehicle.
(2) Connect the sunroof drain hoses, if equipped.
(3) Connect the sunroof harness, the rear wire har-
nesses, and the washer hose at the ªAº pillar and at
the liftgate.
(4) Install the sunroof pinch welt, if equipped.
(5) Install the roof rail assist handles (Refer to 23 -
BODY/INTERIOR/ASSIST HANDLE - INSTALLA-
TION).
Fig. 9 Liftgate Washer Hose Routing at Rear of
Headliner
1 - ROOF
2 - REAR WASHER HOSE ROUTING
3 - REAR WASHER HOSE
4 - HEADLINER
Fig. 10 Rear Liftgate Washer Hose Routing at A
Pillar
1 - OVERHEAD CONSOLE WIRE HARNESS
2 - ROOF
3 - REAR WASHER HOSE
4 - REAR WASHER HOSE ROUTING
5 - HEADLINER
WJINTERIOR 23 - 77

INSTALLATION
(1) Position the bin hooks high in the slots on the
quarter trim panel.
(2) Push downward until the bin snaps into place.
(3) Install the hinge screws.
REAR VIEW MIRROR
REMOVAL
(1)If equipped, disconnect mirror harness connector.
(2) Loosen the mirror base setscrew (Fig. 14).
(3) Slide the mirror base upward and off the
bracket.
INSTALLATION
INSTALLATION
(1) Position the mirror base at the bracket and
slide it downward onto the support bracket (Fig. 14).
(2) Tighten the setscrew 1 N´m (15 in. lbs.) torque.
(3) If equipped, connect mirror harness connector.
INSTALLATION - REARVIEW MIRROR
SUPPORT BRACKET
(1) Mark the position for the mirror bracket on the
outside of the windshield glass with a wax pencil.
(2) Clean the bracket contact area on the glass.
Use a mild powdered cleanser on a cloth saturated
with isopropyl (rubbing) alcohol. Finally, clean the
glass with a paper towel dampened with alcohol.
(3) Sand the surface on the support bracket with
fine grit-sandpaper. Wipe the bracket surface clean
with a paper towel.(4) Apply accelerator to the surface on the bracket
according to the following instructions:
(a) Crush the vial to saturate the felt applicator.
(b) Remove the paper sleeve.
(c) Apply accelerator to the contact surface on
the bracket.
(d) Allow the accelerator to dry for five minutes.
(e) Do not touch the bracket contact surface
after the accelerator has been applied.
(5)
Apply adhesive accelerator to the bracket contact
surface on the windshield glass. Allow the accelerator to
dry for one minute. Do not touch the glass contact sur-
face after the accelerator has been applied.
(6) Install the bracket according to the following
instructions:
(a)
Apply one drop of adhesive at the center of the
bracket contact-surface on the windshield glass.
(b) Apply an even coat of adhesive to the contact
surface on the bracket.
(c) Align the bracket with the marked position
on the windshield glass.
(d) Press and hold the bracket in place for at
least one minute.
NOTE: Verify that the mirror support bracket is cor-
rectly aligned, because the adhesive will cure rap-
idly.
(7) Allow the adhesive to cure for 8-10 minutes.
Remove any excess adhesive with an alcohol-damp-
ened cloth.
(8) Allow the adhesive to cure for an additional
8-10 minutes before installing the mirror.
SUN VISOR
REMOVAL
(1) Remove screws attaching sunvisor arm support
bracket to headliner and roof panel.
(2) Disengage electrical connections for vanity mir-
ror, if equipped.
(3) Detach sunvisor from support bracket.
(4) Remove sunvisor from vehicle.
(5) Remove retaining screw and support bracket.
INSTALLATION
(1) Install the retaining screw and support
bracket.
(2) Position the sunvisor in the vehicle.
(3) Connect the electrical harness for the lighted
vanity mirror, if equipped.
(4) Attach the sunvisor to the support bracket.
(5) Install the support bracket w/sunvisor onto the
headliner and roof panel.
Fig. 14 Rear View Mirror
1 - CONNECTOR
2 - SCREW
3 - REAR VIEW MIRROR
4 - SUPPORT BUTTON
5 - WINDSHIELD
23 - 80 INTERIORWJ
REAR STORAGE BOX (Continued)

SUNROOF
TABLE OF CONTENTS
page page
SUNROOF
DESCRIPTION.........................96
DIAGNOSIS AND TESTING - SUNROOF......96
DRAIN TUBE
REMOVAL............................100
INSTALLATION........................100
CONTROL MODULE
REMOVAL............................101
INSTALLATION........................101
DRIVE MOTOR
REMOVAL............................101
INSTALLATION........................101
WIND DEFLECTOR
REMOVAL............................102INSTALLATION........................102
GLASS PANEL
REMOVAL............................102
INSTALLATION........................103
ADJUSTMENTS
ADJUSTMENTS - FIT.................103
ADJUSTMENT - TIMING...............103
SUNSHADE
REMOVAL............................103
INSTALLATION........................103
HOUSING ASSEMBLY
REMOVAL............................104
INSTALLATION........................104
SUNROOF
DESCRIPTION
WARNING: Keep fingers and other body parts out
of sunroof opening at all times.
The sunroof features a power sliding glass panel
and a sunshade which can be manually positioned
anywhere along its travel, rearward of glass panel
front edge.
The sunroof is electrically operated from a switch
located on the mini overhead console. To operate the
sunroof the ignition switch must be in the On/Run
position. The sunroof has both manual and Express
Open modes of operation when opening. To open the
sunroof in the Express Open mode, the switch is
pressed rearward for less than1 second.This causes
the sunroof glass to automatically retract and stop at
a position slightly forward of full open that reduces
low speed wind buffeting. The sunroof can also be
opened manually by pressing and holding the switch
rearward. Once the switch is held reward for more
than1 second,the glass will retract in the manual
mode. Releasing the switch at any time during travel
will cause the sunroof to stop at the current position.
To close the sunroof from an open position, the
switch must be pushed forward and held until the
sunroof glass comes to a complete stop. Releasing the
switch at any time in this mode will cause the sun-
roof to stop at the current position.
To vent the sunroof from the closed position, the
switch is pushed forward and held. Releasing theswitch at any time during travel will cause the sun-
roof to stop at the current vent position. To reach the
fully vented position, continue to hold the switch for-
ward until vent motion stops. To close the sunroof
from the vent position, push and hold the switch
rearward until the glass comes to a complete stop.
DIAGNOSIS AND TESTING - SUNROOF
CAUTION: The sunroof motor is only to be powered
through the vehicle battery and vehicle wire har-
ness. Applying power to the sunroof motor leads
will cause failure of the sunroof control unit.
Before beginning sunroof diagnostics verify that all
other power accessories are in proper operating con-
dition. Refer to Sunroof Diagnostic Chart for possible
causes. If not, a common electrical problem may
exist. Refer to Group 8W, Wiring Diagrams, of this
publication for circuit, splice and component descrip-
tions. Check the condition of the circuit protection
(20 amp high current fuse (battery feed) located in
the Power Distribution Center (PDC). Check the
cover of the PDC for location of the fuse. Check for
correct operation of the sunroof delay relay. Inspect
all wiring connector pins for proper engagement and
continuity. Check for battery voltage at battery and
ignition pins of the power sunroof express module
wiring connector. Refer to Group 8W, Wiring Dia-
grams, for circuit information. The controller will not
operate at less than 10 volts. Check the ground at
the sunroof express module.
Before beginning diagnosis for wind noise or water
leaks, verify that the problem was not caused by
23 - 96 SUNROOFWJ

CONTROL MODULE
REMOVAL
(1) Move the glass panel to the fully closed posi-
tion.
(2) Remove the A-pillar trim. (Refer to 23 - BODY/
INTERIOR/A-PILLAR TRIM - REMOVAL)
(3) Remove the sun visors. (Refer to 23 - BODY/
INTERIOR/SUN VISOR - REMOVAL)
(4) Remove the overhead console. (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - REMOVAL)
(5) Lower headliner as necessary to gain access to
the sunroof express module.
(6) Disconnect the express module wire harness
connectors.
(7) Remove express module screw.
(8) Remove express module from the keyway by
sliding module towards the center of the vehicle.
INSTALLATION
(1) Insert sunroof express module in the keyway
located in the sunroof module and slide the module
outward to lock it into position.
(2) Install the sunroof express module screw.
(3) Connect the wire connectors to the sunroof
express module.
(4) Install the headliner into position.
(5) Install the overhead console. (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - INSTALLA-
TION)
(6) Install the sun visors. (Refer to 23 - BODY/IN-
TERIOR/SUN VISOR - INSTALLATION)
(7) Install the A-pillar trim. (Refer to 23 - BODY/
INTERIOR/A-PILLAR TRIM - INSTALLATION)
(8) Test sunroof operation, adjust if necessary.
(Refer to 23 - BODY/SUNROOF/GLASS PANEL -
ADJUSTMENTS)
DRIVE MOTOR
REMOVAL
CAUTION: The sunroof system is timed from the
factory so that the motor shuts off automatically
when the sunroof window reaches a certain posi-
tion. Extreme care must be taken when removing
the motor, timing may be thrown off causing possi-
ble damage to the sunroof system. Anytime the
motor is removed from the sunroof assembly the
sunroof glass panel must be in the FULLY CLOSED
POSITION or the unit will be out of timing. The drive
motor cannot be reset to the park position after
being removed.CAUTION: The sunroof motor should only be pow-
ered through the vehicle battery and sunroof wire
harness. Applying power to the sunroof motor leads
will cause failure of the control module.
(1) Move glass panel to the fully closed position.
(2) Remove the A-pillar trim. (Refer to 23 - BODY/
INTERIOR/A-PILLAR TRIM - REMOVAL)
(3) Remove the B-pillar upper trim. (Refer to 23 -
BODY/INTERIOR/B-PILLAR UPPER TRIM -
REMOVAL)
(4) Remove the C-pillar trim. (Refer to 23 - BODY/
INTERIOR/C-PILLAR TRIM - REMOVAL)
(5) Remove the D-pillar trim. (Refer to 23 - BODY/
INTERIOR/D-PILLAR TRIM - REMOVAL)
(6) Remove the sunvisors. (Refer to 23 - BODY/IN-
TERIOR/SUN VISOR - REMOVAL)
(7) Remove the overhead console. (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - REMOVAL)
(8) Disconnect the control switch wire connector.
(9) Remove headliner as necessary to gain access
to sunroof drive motor. Refer to Headliner Removal
and Installation for proper procedures.
(10) Disconnect the drive motor wire harness con-
nectors (Fig. 3).
(11) Remove drive motor fasteners and remove
motor from the sunroof housing.
INSTALLATION
(1) Ensure that the window is in the fully closed
position before mounting the motor. If motor fails
with the window in the open position the sunroof
glass panel timing will have to be timed. The new
motor comes in the fully closed position and with a
gage for setting cable timing. (Refer to 23 - BODY/
SUNROOF/GLASS PANEL - ADJUSTMENTS - TIM-
ING)
(2) Place drive motor into position on the sunroof
housing and install fasteners.
Fig. 3 Sunroof Drive Motor and Express Module
1 - EXPRESS MODULE
2 - SCREW
WJSUNROOF 23 - 101

(3) Connect express module, drive motor, and con-
trol switch wire connectors.
(4) Set headliner into position.
(5) Test sunroof operation, adjust as necessary.
(Refer to 23 - BODY/SUNROOF/GLASS PANEL -
ADJUSTMENTS)
(6) Finish installing the headliner.
(7) Connect the control switch wire connector.
(8) Install the overhead console. (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - INSTALLA-
TION)
(9) Install the sunvisors. (Refer to 23 - BODY/IN-
TERIOR/SUN VISOR - INSTALLATION)
(10) Install the D-pillar trim. (Refer to 23 - BODY/
INTERIOR/D-PILLAR TRIM - INSTALLATION)
(11) Install the C-pillar trim. (Refer to 23 - BODY/
INTERIOR/C-PILLAR TRIM - INSTALLATION)
(12) Install the B-pillar upper trim. (Refer to 23 -
BODY/INTERIOR/B-PILLAR UPPER TRIM -
INSTALLATION)
(13) Install the A-pillar trim. (Refer to 23 - BODY/
INTERIOR/A-PILLAR TRIM - INSTALLATION)
WIND DEFLECTOR
REMOVAL
(1) Open sunroof glass panel.
(2) Push down one corner of the wind deflector and
let the other corner rise up (Fig. 4).
(3) Push the low corner towards the opposite side
of the vehicle until tab on sunshade clears the body.
Then raise the corner up.
(4) Repeat the procedure to the other corner.
(5) Lift wind deflector to 90% of the way.
(6) Push the attaching ends of the deflector to the
rear of the vehicle to disengage the deflector.
INSTALLATION
(1) Place wind deflector at 90% in the vertical posi-
tion to the sunroof. With the sunroof open.
(2) Push ends of the deflector towards the front of
the vehicle to engage ends.
(3) Lower wind deflector to normal position.
(4) Push one corner to the opposite side of the
vehicle until tab clears vehicle body and lower deflec-
tor for that corner.
(5) Push the side that was just installed com-
pletely down.
(6) Push the opposite corner cross vehicle until tab
clears the body. Then lower deflector to position.
(7) Test sunroof operation.
GLASS PANEL
REMOVAL
(1) Slide sunshade rearward to the open position.
(2) Move the glass panel to the fully closed posi-
tion.
(3) Remove the four attaching screws (Fig. 5).
(4) Lift off glass panel and remove from vehicle.
Fig. 4 Wind Deflector
1 - WIND DEFLECTOR
2-TAB
Fig. 5 Sunroof Glass Panel Removal
1 - ATTACHING SCREW
23 - 102 SUNROOFWJ
DRIVE MOTOR (Continued)

OPERATION
OPERATION - HEATER AND AIR CONDITIONER
Outside fresh air enters the vehicle through the
cowl top opening at the base of the windshield, and
passes through a plenum chamber to the HVAC sys-
tem blower housing. Air flow velocity can then be
adjusted with the blower motor speed selector switch
on the a/c heater control panel. The air intake open-
ings must be kept free of snow, ice, leaves, and other
obstructions for the HVAC system to receive a suffi-
cient volume of outside air.
It is also important to keep the air intake openings
clear of debris because leaf particles and other debris
that is small enough to pass through the cowl ple-
num screen can accumulate within the HVAC hous-
ing. The closed, warm, damp and dark environment
created within the HVAC housing is ideal for the
growth of certain molds, mildews and other fungi.
Any accumulation of decaying plant matter provides
an additional food source for fungal spores, which
enter the housing with the fresh air. Excess debris,
as well as objectionable odors created by decaying
plant matter and growing fungi can be discharged
into the passenger compartment during HVAC sys-
tem operation.
Both the manual and AZC heater and air condi-
tioner are blend-air type systems. In a blend-air sys-
tem, a blend door controls the amount of
unconditioned air (or cooled air from the evaporator)
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 tempera-
ture by energizing the blend door actuator, which
operates the blend door. This allows an almost imme-
diate control of the output air temperature of the sys-
tem. The AZC system will have separate blend doors
and temperature controls for each front seat occu-
pant.
The mode control knob on the a/c heater control
panel is used to direct the conditioned air to the
selected system outlets. On manual temperature con-
trol systems, the mode control knob switches engine
vacuum to control the mode doors, which are oper-
ated by vacuum actuators. On AZC systems, the
mode control knob switches electrical current to con-
trol the mode doors, which are operated by electronic
actuators.
The outside air intake can be shut off on manual
temperature control systems by selecting the Recircu-
lation Mode with the mode control knob. The outside
air intake can be shut off on Automatic Zone Control
(AZC) type system by pushing the Recirculation
Mode button. This will operate the recirculation door
that closes off the outside fresh air intake and recir-
culates the air that is already inside the vehicle.The air conditioner for all models is designed for
the use of non-CFC, R-134a refrigerant. The air con-
ditioning system has an evaporator to cool and dehu-
midify the incoming air prior to blending it with the
heated air. This air conditioning system uses a ther-
mal expansion valve to meter refrigerant flow to the
evaporator coil. To maintain minimum evaporator
temperature and prevent evaporator freezing, the
system utilizes an evaporator thermister probe with
the appropriate operating logic located in the body
control module (BCM).
OPERATION - REFRIGERANT SYSTEM SERVICE
PORT
The high pressure service port is located on the liq-
uid line near the receiver/drier. The low pressure ser-
vice port is located on the suction line near the
evaporator at the rear of the engine compartment.
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 specific humidity air. The evaporator, located
in the HVAC housing on the dash panel below the
instrument panel, is cooled to temperatures near the
freezing 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 tempera-
ture of the air delivered to the interior of the vehicle. It
is important to understand the effect that humidity has
on the performance of the air conditioning 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 evaporator fins. Condensing the
moisture in the air transfers heat energy into the evap-
orator 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.
24 - 2 HEATING & AIR CONDITIONINGWJ
HEATING & AIR CONDITIONING (Continued)

(5) Install the new diode in the harness, making
sure current flow is correct. If necessary refer to the
appropriate wiring diagram for current flow.
(6) Solder the connection together using rosin core
type solder only.Do not use acid core solder.
(7) Tape the diode to the harness using electrical
tape making, sure the diode is completely sealed
from the elements.
(8) Re-connect the battery, and test affected sys-
tems.SPECIFICATIONS
A/C APPLICATION TABLE
Item Description Notes
VEHICLE WJ - Grand
Cherokee
SYSTEM R134a w/
expansion valve
COMPRESSOR Nippondenso
10PA17ND-8 PAG oil
Freeze±up
ControlEvaporator Probe Evaporator
mounted
Low psi Control opens < 22 psi -
resets > 34-38 psi
High psi Control opens > 450-490
psi - resets <
270-330 psiline mounted
CONTROL
HEADManual type manual
controls
Automatic Zone
Control (AZC)Automatic
Zone Control
(AZC) with
dual infrared
sensing
Mode Doors Vacuum actuators
(manual)electric
actuator
(AZC)
Blend Door Electric actuator (manual and
AZC)
Blend Door
(passenger)Electric actuator (AZC only)
Recirculation
DoorVacuum actuator
(manual)electric
actuator
(AZC)
Blower Motor Hardwired to
control head
resistor block
(manual),
blower
controller (AZC)
COOLING FAN Hybrid - viscous
clutch/electricPCM output
CLUTCH
Control Relay PCM
controlled
Draw
2.0-3.9 amps @ 12 V  0.5V@ 70É F
Gap 0.0169-0.0319
DRB IIIT
Reads TPS, RPM, A/C
switch
Actuators Clutch relay
WJHEATING & AIR CONDITIONING 24 - 7
HEATING & AIR CONDITIONING (Continued)