frame JEEP GRAND CHEROKEE 2003 WJ / 2.G Repair Manual

(8) Position head restraint release button caps on
head restraint sleeves and press to secure.
(9) Install head restraint (Refer to 23 - BODY/
SEATS/FRONT HEADREST - INSTALLATION).
FRONT SEAT CUSHION/COVER
REMOVAL
(1) Remove seat from vehicle (Refer to 23 - BODY/
SEATS/FRONT SEAT - REMOVAL).
(2) Remove seat back (Refer to 23 - BODY/SEATS/
FRONT SEAT BACK - REMOVAL).
(3) Disengage J-straps attaching cushion cover to
seat cushion frame.
(4) Disengage hog rings attaching cushion cover to
cushion frame at rear of seat along bottom of cushion
cover (Fig. 6).
(5) Roll up edges of cover and route seat function
switches through access hole on outboard side of seat
cushion, if equipped.
(6) Disengage seat cushion heater element connec-
tor, if equipped.
(7) Disengage hog rings attaching cover to cushion
along cover insert.
(8) Separate seat cushion cover from seat cushion.
INSTALLATION
(1) Position seat cover on cushion.
(2) Engage hog rings attaching cushion cover to
cushion along insert.
(3) Engage seat cushion heater element connector,
if equipped.
(4) Route seat function switches through access
hole on outboard side of seat cushion, if equipped.(5) Engage J-straps attaching cushion cover to seat
cushion frame.
(6) Engage hog rings attaching cushion cover to
cushion frame.
(7) Install seat back (Refer to 23 - BODY/SEATS/
FRONT SEAT BACK - INSTALLATION).
(8) Install seat (Refer to 23 - BODY/SEATS/
FRONT SEAT - INSTALLATION).
FRONT SEAT SIDE SHIELD
REMOVAL
(1) Remove screws attaching side shield to seat
frame.
(2) Disconnect wire harness connectors from power
seat and power lumbar switches, if equipped.
(3) Separate side shield from seat.
INSTALLATION
(1) Position side shield on seat.
(2) Connect wire harness connectors to power seat
and power lumbar switches, if equipped.
(3) Install screws attaching side shield to seat
frame.
SEAT TRACK & RECLINER
ASSEMBLY
REMOVAL
(1) Remove seat back (Refer to 23 - BODY/SEATS/
FRONT SEAT BACK - REMOVAL).
(2) Disengage J-strap at base of seat back.
(3) Roll seat back cover upward to access bolts
attaching recliner to seat back frame.
(4) Remove bolts attaching recliner to seat back
frame.
(5) Separate recliner from seat back.
INSTALLATION
(1) Position recliner on seat back.
(2) Install bolts attaching recliner to seat back
frame. Tighten bolts to 28 N´m (20 ft. lbs.) torque.
(3) Roll seat back cover downward.
(4) Engage J-strap at base of seat back.
(5) Install seat back (Refer to 23 - BODY/SEATS/
FRONT SEAT BACK - INSTALLATION).Fig. 6 Seat Cushion Cover
1 - HOG RING
2 - CUSHION COVER
23 - 86 SEATSWJ
FRONT SEAT BACK COVER (Continued)

SEAT TRACK ADJUSTER
REMOVAL
(1) Remove seat (Refer to 23 - BODY/SEATS/
FRONT SEAT - REMOVAL).
(2) Remove side shield (Refer to 23 - BODY/
SEATS/FRONT SEAT SIDE SHIELD - REMOVAL).
(3) Remove nuts attaching seat track adjuster to
seat cushion frame (Fig. 7) and (Fig. 8). Roll cushion
trim cover up to access the two front nuts.
(4) Disengage clips attaching wire harness to
adjuster.
(5) Disengage seat memory module connector, if
equipped.
(6) Separate seat track from seat cushion frame.
INSTALLATION
(1) Transfer seat memory module, if equipped.
(2) Position seat track on seat cushion frame.
(3) Route harness through frame and engage clips
attaching wire harness to adjuster.
(4) Engage seat memory module connector, if
equipped.
(5) Install nuts attaching seat track adjuster to
seat cushion frame. Tighten nuts to 28 N´m (20 ft.
lbs.) torque.
(6) Install the side shield (Refer to 23 - BODY/
SEATS/FRONT SEAT SIDE SHIELD - INSTALLA-
TION).
(7) Install seat (Refer to 23 - BODY/SEATS/
FRONT SEAT - INSTALLATION).
Fig. 7 Seat Track AdjusterÐPower
1 - BACK PANEL
2 - LUMBAR ASSEMBLY
3 - SEAT CUSHION FRAME
4 - POWER SEAT TRACK ADJUSTER
5 - POWER RECLINER
6 - SEAT CUSHION PAD
7 - SEAT BACK FRAME
Fig. 8 Seat Track Adjuster Ð Manual
1 - MANUAL RECLINER
2 - SEAT CUSHION PAD
3 - SEAT BACK FRAME
4 - SEAT CUSHION FRAME
5 - MANUAL SEAT TRACK ADJUSTER
WJSEATS 23 - 87

REAR HEADREST SLEEVE
REMOVAL
(1) Remove seat back (Refer to 23 - BODY/SEATS/
REAR SEAT BACK - REMOVAL).
(2) Remove head rest (Refer to 23 - BODY/SEATS/
REAR HEADREST - REMOVAL).
(3) Remove head rest caps.
(4) Remove seat back cover (Refer to 23 - BODY/
SEATS/REAR SEAT BACK COVER - REMOVAL).
(5) Rotate head rest sleeve 1/4 turn counter-clock-
wise to release retaining tab.
(6) Pull sleeve from seat back frame.
INSTALLATION
(1) Position sleeve in seat back frame.
(2) Rotate head rest sleeve 1/4 turn clockwise to
engage retaining tab.
(3) Install seat back cover (Refer to 23 - BODY/
SEATS/REAR SEAT BACK COVER - INSTALLA-
TION).
(4) Install head rest caps.
NOTE: The head rest cap with the taller button is
always on the inboard side of the seat back.
(5) Install the head rest (Refer to 23 - BODY/
SEATS/REAR HEADREST - INSTALLATION).
NOTE: The folding head rest release knob is always
on the outboard side.
(6) Install the seat back (Refer to 23 - BODY/
SEATS/REAR SEAT BACK - INSTALLATION).
REAR SEAT BACK
REMOVAL
(1) Move rear seat cushions to forward cargo posi-
tion.
(2) Remove bolts attaching seatback side support
bracket to floor pan (right side) (Fig. 11).
(3) Tilt seatback forward, and slide it outboard to
detach it from pin on center pivot bracket.
(4) Remove right side (60%) seatback from vehicle.
(5) Remove bolts attaching seatback side support
bracket and center pivot bracket to floor pan (left
side).
(6) Remove left side (40%) seatback from vehicle.
INSTALLATION
(1) Position left side (40%) seatback in vehicle.
(2) Position left side support bracket and center
pivot bracket with bolt holes aligned and install
bolts. Tighten bolts to 28 N´m (20 ft. lbs.) torque.
(3) Position right side (60%) seatback in vehicle.
(4) Install seatback onto center pivot bracket pin.
Ensure seat back is properly engaged on the center
pivot pin.
(5) Position right side support bracket with bolt
holes aligned and install bolts. Tighten bolts to 28
N´m (20 ft. lbs.) torque.
(6) Return seat cushions to seating position.
Fig. 11 Rear Seat Back
1 - SEAT BACK
2 - FLOOR PAN
3 - CENTER PIVOT BRACKET
4 - SIDE SUPPORT BRACKET
WJSEATS 23 - 89

REAR SEAT BACK COVER
REMOVAL
(1) Remove seat back (Refer to 23 - BODY/SEATS/
REAR SEAT BACK - REMOVAL).
(2) Remove head restraint (Refer to 23 - BODY/
SEATS/REAR HEADREST - REMOVAL).
(3) Remove head restraint caps.
(4) Disengage J-straps on outboard side of seat
back.
(5) Disengage J-straps at base of seat back.
(6) Remove screws attaching latch release handle
to seat back frame.
(7) Roll seat back cover upward.
(8) Disengage hook and loop fasteners attaching
seat back cover to seat back pad (Fig. 12).
(9) Roll seat back cover upward and route latch
release handle through seat back cover.
(10) Separate seat back cover from seat back.
(11) Separate seat back pad from seat back frame.
INSTALLATION
(1) Position seat back cover and pad on seat back
frame.
(2) Route latch release handle through seat back
cover.(3) Roll seat back cover partially downward align-
ing holes in seat back cover for head restraint and
latch release handle.
(4) Roll seat back cover downward align and
engage hook and loop fasteners to seat back pad.
(5) Engage J-straps at base of seat back.
(6) Engage J-straps on outboard side of seat back.
(7) Install screws attaching latch release handle to
seat back frame.
(8) Install head restraint (Refer to 23 - BODY/
SEATS/REAR HEADREST - INSTALLATION).
(9) Install seat back (Refer to 23 - BODY/SEATS/
REAR SEAT BACK - INSTALLATION).
REAR SEAT CUSHION
REMOVAL
(1) Disengage seat cushion at rear by pulling
upward on release strap.
(2) Remove bolts attaching seat cushion to floor
pan (Fig. 13).
(3) Remove seat cushion from vehicle.
INSTALLATION
(1) Position seat cushion in vehicle.
(2) Install bolts attaching seat cushion to floor
pan. Tighten bolts to 11 N´m (8 ft. lbs.) torque.
(3) Lock seat cushion down by pressing firmly on
center of cushion until latch engages.
Fig. 12 Rear Seat Back Cover
1 - SEAT BACK COVER
2 - SEAT BACK PAD
3 - HOOK AND LOOP FASTENERFig. 13 Rear Seat Cushion
1 - SEAT CUSHION
2 - FLOOR PAN
23 - 90 SEATSWJ

REAR SEAT CUSHION COVER
REMOVAL
(1) Remove rear seat cushion (Refer to 23 - BODY/
SEATS/REAR SEAT CUSHION - REMOVAL).
(2) From the underside of the seat, disengage
J-straps attaching cover to seat cushion base panel.
(3) Remove push-in fasteners attaching cushion
cover to seat cushion base panel (Fig. 14).
(4) Roll back cover.
(5) Disengage hog rings attaching cushion cover to
seat cushion foam pad.
(6) Separate cushion cover from seat cushion foam
pad.
INSTALLATION
(1) Position cushion cover on seat cushion foam
pad.
(2) Engage hog rings attaching cushion cover to
seat cushion foam pad.
(3) Align cushion cover and engage J-straps
attaching cushion cover to seat cushion base panel.
(4) Install push-in fasteners attaching cushion
cover to seat cushion base panel.
(5) Install rear seat cushion (Refer to 23 - BODY/
SEATS/REAR SEAT CUSHION - INSTALLATION).
REAR SEAT CUSHION
RELEASE LATCH
REMOVAL
(1) Unlatch seat and pivot seat upward.
(2) Disengage J-strap at seat cushion base panel.
(3) Roll back cushion cover.(4) Remove screws attaching latch to base panel.
(5) Separate latch from base panel.
INSTALLATION
(1) Position latch on base panel.
(2) Install screws attaching latch to base panel.
Tighten screws to 8 N´m (75 in. lbs.) torque.
(3) Route the cushion release strap from the loop
on the latch through the slot in the trim cover.
(4) Engage J-strap at seat cushion base panel.
(5) latch seat.
FOLDING REAR SEAT BACK
LATCH HANDLE
REMOVAL
(1) Pull handle to release latch.
(2) Remove screws attaching release handle to seat
back frame.
(3) Using a small flat blade, disengage retainers
securing latch release cable housing to latch release
handle.
(4) Rotate cable end until barrel end aligns with
key hole slot in latch release handle.
(5) Disengage cable barrel end from release han-
dle.
(6) Separate latch release handle from seat back
(Fig. 15).
Fig. 14 Push-in Fasteners
1 - CUSHION COVER
2 - SEAT CUSHION BASE PANEL
3 - PUSH-IN FASTENER
Fig. 15 Rear Seat Release Handle
1 - REAR SEAT FOLDING RELEASE HANDLE
WJSEATS 23 - 91

INSTALLATION
(1) Route cable end into latch release handle.
(2) Rotate cable end until barrel end aligns with
key hole slot in latch release handle and insert into
handle.
(3) Engage retainers securing latch release cable
housing to latch release handle.
(4) Position latch release handle in seat back.
Ensure seat back cover is properly aligned.
(5) Install screws attaching release handle to seat
back frame.
FOLDING REAR SEAT BACK
LATCH/HINGE
REMOVAL
(1) Remove seat back (Refer to 23 - BODY/SEATS/
REAR SEAT BACK - REMOVAL).
(2) Disengage J-straps on outboard side of seat
back.
(3) Disengage release cable from latch.
(4) Remove bolts attaching latch/hinge to seat back
frame.
(5) Separate latch/hinge from seat back frame.
INSTALLATION
(1) Position latch/hinge on seat back frame.
(2) Install bolts attaching latch/hinge to seat back
frame. Tighten bolts to 28 N´m (20 ft. lbs.) torque.
(3) Engage latch release cable.
(4) Engage J-straps on outboard side of seat back.
(5) Install seat back (Refer to 23 - BODY/SEATS/
REAR SEAT BACK - INSTALLATION).
23 - 92 SEATSWJ
FOLDING REAR SEAT BACK LATCH HANDLE (Continued)

STATIONARY GLASS
TABLE OF CONTENTS
page page
DOOR GLASS
REMOVAL.............................93
INSTALLATION.........................93
QUARTER WINDOW
REMOVAL.............................93INSTALLATION.........................93
WINDSHIELD
REMOVAL.............................94
INSTALLATION.........................95
DOOR GLASS
REMOVAL
(1) Remove door trim panel.
(2) Remove waterdam.
(3) Remove inner belt weatherstrip.
(4) Remove bolt attaching bottom of rear glass run
channel to door.
(5) Pull run channel downward and separate from
door.
(6) Remove screws attaching stationary door glass
frame to door (Fig. 1) and (Fig. 2).
(7) Separate stationary door glass from door.
INSTALLATION
(1) Position stationary door glass in door.
(2) Install screws attaching stationary door glass
frame to door.
(3) Install glass run channel.
(4) Install inner belt weatherstrip.
(5) Install waterdam.
(6) Install door trim panel.
QUARTER WINDOW
REMOVAL
(1) Cut urethane bonding from around quarter
window glass using a suitable sharp cold knife. A
pneumatic cutting device can be used if available.
(2) Separate glass from vehicle.
INSTALLATION
CAUTION: Open a window before installing glass.
This will avoid pressurizing the passenger compart-
ment. If a door or liftgate is slammed before ure-
thane is cured, water leaks can result.
The window opening fence should be cleaned of old
urethane bonding material.
(1) Clean inside of glass with Mopar Glass Cleaner
and lint-free cloth.
(2) Apply PVC (vinyl) primer 25 mm (1 in.) wide
around edge of glass. Wipe with clean/dry lint-free
cloth.
Fig. 1 Stationary Door Glass
1 - DOOR
2 - STATIONARY DOOR GLASS
Fig. 2 Stationary Door Glass
1 - STATIONARY DOOR GLASS
2 - DOOR
WJSTATIONARY GLASS 23 - 93

Fig. 1 Sunroof Assembly
1 - SUNSHADE
2 - EXPRESS MODULE
3 - DRIVE MOTOR
4 - FRAME ASSEMBLY5 - WIND DEFLECTOR
6 - GLASS PANEL
7 - DRAIN CHANNEL
WJSUNROOF 23 - 99
SUNROOF (Continued)

DESCRIPTION - STATE DISPLAY TEST MODE
The switch inputs to the Powertrain Control Mod-
ule (PCM) have two recognized states; HIGH and
LOW. For this reason, the PCM cannot recognize the
difference between a selected switch position versus
an open circuit, a short circuit, or a defective switch.
If the State Display screen shows the change from
HIGH to LOW or LOW to HIGH, assume the entire
switch circuit to the PCM functions properly. Connect
the DRB scan tool to the data link connector and
access the state display screen. Then access either
State Display Inputs and Outputs or State Display
Sensors.
DESCRIPTION - CIRCUIT ACTUATION TEST
MODE
The Circuit Actuation Test Mode checks for proper
operation of output circuits or devices the Powertrain
Control Module (PCM) may not internally recognize.
The PCM attempts to activate these outputs and
allow an observer to verify proper operation. Most of
the tests provide an audible or visual indication of
device operation (click of relay contacts, fuel spray,
etc.). Except for intermittent conditions, if a device
functions properly during testing, assume the device,
its associated wiring, and driver circuit work cor-
rectly. Connect the DRB scan tool to the data link
connector and access the Actuators screen.
DESCRIPTION - DIAGNOSTIC TROUBLE CODES
A Diagnostic Trouble Code (DTC) indicates the
PCM has recognized an abnormal condition in the
system.Remember that DTC's are the results of a sys-
tem or circuit failure, but do not directly iden-
tify the failed component or components.
NOTE: For a list of DTC's, refer to the charts in this
section.
BULB CHECK
Each time the ignition key is turned to the ON
position, the malfunction indicator (check engine)
lamp on the instrument panel should illuminate for
approximately 2 seconds then go out. This is done for
a bulb check.
OBTAINING DTC'S USING DRB SCAN TOOL
(1) Connect the DRB scan tool to the data link
(diagnostic) connector. This connector is located in
the passenger compartment; at the lower edge of
instrument panel; near the steering column.
(2) Turn the ignition switch on and access the
ªRead Faultº screen.
(3) Record all the DTC's and ªfreeze frameº infor-
mation shown on the DRB scan tool.
(4) To erase DTC's, use the ªErase Trouble Codeº
data screen on the DRB scan tool.Do not erase any
DTC's until problems have been investigated
and repairs have been performed.
(M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)Generator lamp illuminated
Generic Scan
Tool P-CodeDRB Scan Tool Display Brief Description of DTC
P0030 (M) 1/1 O2 Sensor Heater Circuit
MalfunctionProblem detected in oxygen sensor heater relay circuit.
P0031 (M) 1/1 O2 Sensor Heater Circuit Low Problem detected in oxygen sensor heater relay circuit.
P0032 (M) 1/1 O2 Sensor Heater Circuit High Problem detected in oxygen sensor heater relay circuit.
P0036 (M) 1/2 O2 Sensor Heater Circuit
MalfunctionProblem detected in oxygen sensor heater relay circuit.
P0037 (M) 1/2 O2 Sensor Heater Circuit Low Problem detected in oxygen sensor heater relay circuit.
P0038 (M) 1/2 O2 Sensor Heater Circuit High Problem detected in oxygen sensor heater relay circuit.
P0043 (M) 1/3 O2 Sensor Heater Circuit Low Problem detected in oxygen sensor heater relay circuit.
P0044 (M) 1/3 O2 Sensor Heater Circuit High Problem detected in oxygen sensor heater relay circuit.
P0051 (M) 2/1 O2 Sensor Heater Circuit Low Problem detected in oxygen sensor heater relay circuit.
P0052 (M) 2/1 O2 Sensor Heater Circuit High Problem detected in oxygen sensor heater relay circuit.
25 - 2 EMISSIONS CONTROLWJ
EMISSIONS CONTROL (Continued)

OPERATION - TASK MANAGER
The Task Manager determines which tests happen
when and which functions occur when. Many of the
diagnostic steps required by OBD II must be per-
formed under specific operating conditions. The Task
Manager software organizes and prioritizes the diag-
nostic procedures. The job of the Task Manager is to
determine if conditions are appropriate for tests to be
run, monitor the parameters for a trip for each test,
and record the results of the test. Following are the
responsibilities of the Task Manager software:
²Test Sequence
²MIL Illumination
²Diagnostic Trouble Codes (DTCs)
²Trip Indicator
²Freeze Frame Data Storage
²Similar Conditions Window
Test Sequence
In many instances, emissions systems must fail
diagnostic tests more than once before the PCM illu-
minates the MIL. These tests are know as 'two trip
monitors.' Other tests that turn the MIL lamp on
after a single failure are known as 'one trip moni-
tors.' A trip is defined as 'start the vehicle and oper-
ate it to meet the criteria necessary to run the given
monitor.'
Many of the diagnostic tests must be performed
under certain operating conditions. However, there
are times when tests cannot be run because another
test is in progress (conflict), another test has failed
(pending) or the Task Manager has set a fault that
may cause a failure of the test (suspend).
²Pending
Under some situations the Task Manager will not
run a monitor if the MIL is illuminated and a fault is
stored from another monitor. In these situations, the
Task Manager postpones monitorspendingresolu-
tion of the original fault. The Task Manager does not
run the test until the problem is remedied.
For example, when the MIL is illuminated for an
Oxygen Sensor fault, the Task Manager does not run
the Catalyst Monitor until the Oxygen Sensor fault is
remedied. Since the Catalyst Monitor is based on sig-
nals from the Oxygen Sensor, running the test would
produce inaccurate results.
²Conflict
There are situations when the Task Manager does
not run a test if another monitor is in progress. In
these situations, the effects of another monitor run-
ning could result in an erroneous failure. If thiscon-
flictis present, the monitor is not run until the
conflicting condition passes. Most likely the monitor
will run later after the conflicting monitor has
passed.
For example, if the Fuel System Monitor is inprogress, the Task Manager does not run the EGR
Monitor. Since both tests monitor changes in air/fuel
ratio and adaptive fuel compensation, the monitors
will conflict with each other.
²Suspend
Occasionally the Task Manager may not allow a two
trip fault to mature. The Task Manager willsus-
pendthe maturing of a fault if a condition exists
that may induce an erroneous failure. This prevents
illuminating the MIL for the wrong fault and allows
more precis diagnosis.
For example, if the PCM is storing a one trip fault
for the Oxygen Sensor and the EGR monitor, the
Task Manager may still run the EGR Monitor but
will suspend the results until the Oxygen Sensor
Monitor either passes or fails. At that point the Task
Manager can determine if the EGR system is actu-
ally failing or if an Oxygen Sensor is failing.MIL Illumination
The PCM Task Manager carries out the illumina-
tion of the MIL. The Task Manager triggers MIL illu-
mination upon test failure, depending on monitor
failure criteria.
The Task Manager Screen shows both a Requested
MIL state and an Actual MIL state. When the MIL is
illuminated upon completion of a test for a third trip,
the Requested MIL state changes to OFF. However,
the MIL remains illuminated until the next key
cycle. (On some vehicles, the MIL will actually turn
OFF during the third key cycle) During the key cycle
for the third good trip, the Requested MIL state is
OFF, while the Actual MIL state is ON. After the
next key cycle, the MIL is not illuminated and both
MIL states read OFF.
Diagnostic Trouble Codes (DTCs)
With OBD II, different DTC faults have different
priorities according to regulations. As a result, the
priorities determine MIL illumination and DTC era-
sure. DTCs are entered according to individual prior-
ity. DTCs with a higher priority overwrite lower
priority DTCs.
Priorities
²Priority 0 ÐNon-emissions related trouble codes
²Priority 1 Ð One trip failure of a two trip fault
for non-fuel system and non-misfire.
²Priority 2 Ð One trip failure of a two trip fault
for fuel system (rich/lean) or misfire.
²Priority3ÐTwotrip failure for a non-fuel sys-
tem and non-misfire or matured one trip comprehen-
sive component fault.
²Priority4ÐTwotrip failure or matured fault
for fuel system (rich/lean) and misfire or one trip cat-
alyst damaging misfire.
WJEMISSIONS CONTROL 25 - 21
EMISSIONS CONTROL (Continued)