2002 JEEP GRAND CHEROKEE Car seat

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

COWL WEATHERSTRIP
REMOVAL
(1) Raise hood.
(2) Pull cowl plenum seal from cowl.
(3) Separate cowl plenum seal from cowl (Fig. 2).
INSTALLATION
(1) Position cowl plenum seal on cowl.
(2) Press cowl plenum seal to seat.
FRONT DOOR GLASS RUN
WEATHERSTRIP
REMOVAL
(1) Remove inner belt weatherstrip (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FDR INNER BELT
WEATHERSTRIP - REMOVAL).
(2) Remove outer belt weatherstrip (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FDR OUTER BELT
WEATHERSTRIP - REMOVAL).
(3) Grasp seal from upper run channel corner and
firmly pull weatherstrip from flange and run channel
(Fig. 3).
INSTALLATION
NOTE: Soapy water may be used to aid in installation.
(1) Remove front door speaker.
(2) Position weatherstrip on flange aligning each
corner.
(3) Press weatherstrip into position.
(4) Carefully move door glass for and aft and press
weatherstrip into glass run channels.
(5) Install front door speaker.(6) Install outer belt weatherstrip (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FDR OUTER BELT
WEATHERSTRIP - INSTALLATION).
(7) Install inner belt weatherstrip (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FDR INNER BELT
WEATHERSTRIP - INSTALLATION).
FRONT DOOR INNER BELT
WEATHERSTRIP
REMOVAL
(1) Remove door trim panel (Refer to 23 - BODY/
DOOR - FRONT/TRIM PANEL - REMOVAL).
(2) Using a trim stick or other suitable device,
carefully pry up inner edge of seal (Fig. 4).
(3) Grasp the edge of the seal and pull upward to
remove seal from door flange.
Fig. 2 Cowl Plenum Seal
1 - PLENUM SEAL
Fig. 3 Front Door Glass Run Channel Weatherstrip
1 - GLASS RUN CHANNEL WEATHERSTRIP
2 - DOOR
Fig. 4 Inner/Outer Belt Weather Strip
1 - INNER BELT WEATHERSTRIP
2 - OUTER BELT WEATHERSTRIP
23 - 106 WEATHERSTRIP/SEALSWJ

INSTALLATION
(1) Position the seal on the door flange.
(2) Firmly press downward to seat seal on the door
flange.
(3)
Install the door trim panel (Refer to 23 - BODY/
DOOR - FRONT/TRIM PANEL - INSTALLATION).
FDR OUTER BELT
WEATHERSTRIP
REMOVAL
(1) Lower the door glass.
(2) Remove the screw from the inner door panel
attaching the seal to outer door panel (Fig. 4).
(3) Pull the seal rearward to release from the side
view mirror bezel.
(4) Lift seal and separate from door panel.
INSTALLATION
(1) Position seal on the door panel.
(2) Push the seal forward to install under the side
view mirror bezel.
(3) Install the screw from the inner door panel
attaching the seal to outer door panel.
(4) Raise the door glass.
FLIP-UP GLASS
WEATHERSTRIP
REMOVAL
(1) Raise flip up glass.
(2) Carefully pull the seal away from the flange
around the edge of the glass opening (Fig. 5).
(3) Remove it from the vehicle.
INSTALLATION
(1) Thoroughly clean the surface of the flange as
necessary.
(2) Align the weather strip seal with the window
opening corners.
(3) Firmly seat the seal around the entire flange.
But the seal ends together and smooth out any
remaining length.
(4)
Weatherstrip break should be 120mm left of latch
opening. Cut any surplus from non-plug end only.
FRONT DOOR 2ND
WEATHERSTRIP
REMOVAL
The front door secondary weatherstrip is attached
to the door shutface with push-in fasteners.(1) Open door.
(2) Using a trim panel removal tool, remove
push-in fasteners attaching secondary weatherstrip
to door shutface (Fig. 6).
(3) Separate secondary weatherstrip from door.
INSTALLATION
(1) Clean contact area as necessary.
(2) Position secondary weatherstrip on door shut-
face.
(3) Install push-in fasteners attaching secondary
weatherstrip to door shutface.
Fig. 5 Flip-up Glass Weatherstrip
1 - WEATHERSTRIP
2 - LIFTGATE W/FLIP-UP GLASS
Fig. 6 Front Door Secondary Weatherstrip
1 - SECONDARY WEATHERSTRIP
WJWEATHERSTRIP/SEALS 23 - 107
FRONT DOOR INNER BELT WEATHERSTRIP (Continued)

LIFTGATE OPENING
WEATHERSTRIP
REMOVAL
(1) Pull seal away from flange around edge of lift-
gate opening.
(2) Separate weatherstrip from opening (Fig. 9).
(3) Clean weatherstrip flange as necessary.
INSTALLATION
(1) Position weatherstrip in opening with left end
of seal at opening centerline.
(2) Press weatherstrip onto flange in a clockwise
direction.
(3) Center and butt weatherstrip ends together at
centerline.
(4) If necessary, cut surplus from weatherstrip
(non-plug end only).
RDR INNER BELT
WEATHERSTRIP
REMOVAL
(1) Remove door trim panel (Refer to 23 - BODY/
DOORS - REAR/TRIM PANEL - REMOVAL).
(2) Using a trim stick, carefully pry rear inner
edge of inner belt weatherstrip upward.
(3) Grasp weatherstrip and pull upward to sepa-
rate from door flange (Fig. 10).
INSTALLATION
(1) Position weatherstrip on door flange.
(2) Firmly press downward to seat weatherstrip on
flange.
(3) Install trim panel (Refer to 23 - BODY/DOORS
- REAR/TRIM PANEL - INSTALLATION).
RDR OUTER BELT
WEATHERSTRIP
REMOVAL
(1) Remove trim panel (Refer to 23 - BODY/
DOORS - REAR/TRIM PANEL - REMOVAL).
(2) Using a small flat blade, disengage tangs
attaching outer belt weatherstrip to inner door panel.
(3) Lift weatherstrip upward and separate from
door (Fig. 10).
INSTALLATION
(1) Position the weatherstrip onto the door flange.
(2) Force the weatherstrip onto door flange and
engage tangs. Continue rearward until it is seated on
flange.
(3) Instal trim panel (Refer to 23 - BODY/DOORS
- REAR/TRIM PANEL - INSTALLATION).
Fig. 9 Liftgate Opening Weatherstrip
1 - LIFTGATE
2 - WEATHERSTRIP
Fig. 10 Rear Door Inner/Outer Belt Weatherstrip
1 - INNER BELT WEATHERSTRIP
2 - OUTER BELT WEATHERSTRIP
WJWEATHERSTRIP/SEALS 23 - 109

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) Check for battery voltage at the fuse in the
Power Distribution Center (PDC). If OK, go to Step
2. If not OK, repair the shorted circuit or component
as required and replace the faulty fuse.
(2) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Remove the a/c heater control from the instrument
panel. (Refer to 24 - HEATING & AIR CONDITION-
ING/CONTROLS/A/C HEATER CONTROL -
REMOVAL) Check for continuity between the ground
circuit cavity of the a/c heater control wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 3. If not OK, repair the open
circuit to ground as required.
(3) With the a/c heater control wire harness con-
nector unplugged, place the a/c heater mode control
switch knob in any position except the Off position.
Check for continuity between the ground circuit ter-
minal and each of the blower motor driver circuit ter-
minals of the a/c heater control as you move the
blower motor switch knob to each of the four speed
positions. There should be continuity at each driver
circuit terminal in only one blower motor switch
speed position. If OK, test and repair the blower
driver circuits between the a/c heater control connec-
tor and the blower motor resistor as required. If not
OK, replace the faulty a/c heater control unit.
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 ACCIDENTALAIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
The blower motor switch cannot be adjusted or
repaired, and if faulty or damaged, the a/c heater
control must be replaced. (Refer to 24 - HEATING &
AIR CONDITIONING/CONTROLS/A/C HEATER
CONTROL - REMOVAL)
IN-CAR TEMPERATURE
SENSOR
DESCRIPTION
Models equipped with the optional Automatic Zone
Control (AZC) system use automatic dual zone tem-
perature control with infrared sensing technology.
The temperature sensor is located in the center
instrument panel, between the dual temperature
knobs of the AZC.
OPERATION
The Automatic Zone Control uses infrared sensing
technology to control occupant comfort levels, not the
actual passenger compartment air temperature. Dual
infrared sensors mounted in the face of the control
unit independently measure the surface temperature
to maintain customer-perceived comfort temperature
under changing conditions. Dual Zone temperature
control provides wide side-to-side variation in comfort
temperature to exceed the needs of either front seat
occupant. This sensing system replaces interior air
temperature and solar sensors used to approximate
direct sensing control through complex control pro-
grams.
The infrared temperature sensor cannot be
adjusted or repaired and, if faulty or damaged, the
AZC head must be replaced.
NOTE: The infrared sensor window may be perma-
nently damaged if any type of cosmetic vinyl dress-
ings are allowed to contact the lens. Avoid spraying
or wiping this area with any cleaner or conditioner.
This may result in impaired temperature sensing
and control.
REMOVAL
The infrared temperature sensor cannot be
adjusted or repaired and, if faulty or damaged, the
AZC head must be replaced. (Refer to 24 - HEATING
& AIR CONDITIONING/CONTROLS/A/C HEATER
CONTROL - REMOVAL)
WJCONTROLS 24 - 29
BLOWER MOTOR SWITCH (Continued)

(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
P1291 (M) No Temperature Rise Seen From
Intake Air HeatersProblem detected in intake manifold air heating system.
P1292 CNG Pressure Sensor Voltage Too
HighCompressed natural gas pressure sensor reading above
acceptable voltage.
P1293 CNG Pressure Sensor Voltage Too
LowCompressed natural gas pressure sensor reading below
acceptable voltage.
P1294 (M) Target Idle Not Reached Target RPM not achieved during drive idle condition.
Possible vacuum leak or IAC (AIS) lost steps.
P1295 (M) No 5 Volts to TP Sensor Loss of a 5 volt feed to the Throttle Position Sensor has
been detected.
P1295 (M) Accelerator Position Sensor (APPS)
Supply Voltage Too LowAPPS supply voltage input below the minimum
acceptable voltage.
P1296 No 5 Volts to MAP Sensor Loss of a 5 volt feed to the MAP Sensor has been
detected.
P1297 (M) No Change in MAP From Start To
RunNo difference is recognized between the MAP reading at
engine idle and the stored barometric pressure reading.
P1298 Lean Operation at Wide Open
ThrottleA prolonged lean condition is detected during Wide Open
Throttle
P1299 Vacuum Leak Found (IAC Fully
Seated)MAP Sensor signal does not correlate to Throttle Position
Sensor signal. Possible vacuum leak.
P1388 Auto Shutdown Relay Control Circuit An open or shorted condition detected in the ASD or CNG
shutoff relay control ckt.
P1388 Auto Shutdown Relay Control Circuit An open or shorted condition detected in the auto
shutdown relay circuit.
P1389 No ASD Relay Output Voltage At
PCMNo Z1 or Z2 voltage sensed when the auto shutdown
relay is energized.
P1389 (M) No ASD Relay Output Voltage at
PCMAn open condition detected In the ASD relay output
circuit.
P1390 Timing Belt Skipped 1 Tooth or More Relationship between Cam and Crank signals not correct
P1391 (M) Intermittent Loss of CMP or CKP Loss of the Cam Position Sensor or Crank Position
sensor has occurred. For PL 2.0L
P1398 (M) Mis-Fire Adaptive Numerator at Limit PCM is unable to learn the Crank Sensor's signal in
preparation for Misfire Diagnostics. Probable defective
Crank Sensor
P1399 Wait To Start Lamp Cicuit An open or shorted condition detected in the Wait to Start
Lamp circuit.
P1403 No 5V to EGR Sensor Loss of 5v feed to the EGR position sensor.
P01475 Aux 5 Volt Supply Voltage High Sensor supply voltage for ECM sensors is too high.
P1476 Too Little Secondary Air Insufficient flow of secondary air injection detected during
aspirator test (was P0411)
P1477 Too Much Secondary Air Excessive flow of secondary air injection detected during
aspirator test (was P0411).
25 - 12 EMISSIONS CONTROLWJ
EMISSIONS CONTROL (Continued)

set a temporary fault without turning on the MIL
and continue the leak portion of the test. However,
the PCM will assume that the system is already
pressurized and skip the rapid pump cycles.
Always diagnose leaks, if possible, before discon-
necting connections. Disconnecting connections may
mask a leak condition.
Keep in mind that if the purge solenoid seat is
leaking, it could go undetected since the leak would
end up in the intake manifold. Disconnect the purge
solenoid at the manifold when leak checking. In addi-
tion, a pinched hose fault (P1486) could set if the
purge solenoid does not purge the fuel system prop-
erly (blocked seat). The purge solenoid must vent the
fuel system prior to the LDP system test. If the
purge solenoid cannot properly vent the system the
LDP cannot properly complete the test for P1486 and
this fault can set due to pressure being in the EVAP
system during the test sequence.
Multiple actuation's of the DRB IIItLeak Detec-
tion Pump (LDP) Monitor Test can hide a 0.020 leak
because of excess vapor generation. Additionally, any
source for additional vapor generation can hide a
small leak in the EVAP system. Excess vapor gener-
ation can delay the fall of the LDP diaphragm thus
hiding the small leak. An example of this condition
could be bringing a cold vehicle into a warm shop for
testing or high ambient temperatures.
Fully plugged and partially plugged underhood
vacuum lines have been known to set MIL condi-
tions. P1494 and P0456 can be set for this reason.
Always, thoroughly, check plumbing for pinches or
blockage before condemning components.
TEST EQUIPMENT The Evaporative Emission
Leak Detector (EELD) Miller Special Tool 8404 is
capable of visually detecting leaks in the evaporative
system and will take the place of the ultrasonic leak
detector 6917A. The EELD utilizes shop air and a
smoke generator to visually detect leaks down to
0.020 or smaller. The food grade oil used to make the
smoke includes an UV trace dye that will leave tell-
tale signs of the leak under a black light. This is
helpful when components have to be removed to
determine the exact leak location. For detailed test
instructions, follow the operators manual packaged
with the EELD.
NOTE: Be sure that the PCM has the latest software
update. Reprogram as indicated by any applicable
Technical Service Bulletin. After LDP repairs are
completed, verify the repair by running the DRB IIIT
Leak Detection Pump (LDP) Monitor Test as
described in Technical Service Bulletin 18-12-99.REMOVAL
The Leak Detection Pump (LDP) is located under
the left quarter panel behind the left/rear wheel (Fig.
16). It is attached to a two-piece support bracket
(Fig. 17). The LDP and LDP filter are replaced (ser-
viced) as one unit.
(1) Remove stone shield behind left/rear wheel
(Fig. 18). Drill out plastic rivets for removal.
(2) Remove 3 LDP mounting bolts (Fig. 19).
(3) Remove support bracket brace bolt (Fig. 17).
(4) Loosen, but do not remove 2 support bracket
nuts at frame rail (Fig. 19).
(5) To separate and lower front section of two-piece
support bracket, remove 3 attaching bolts on bottom
of support bracket (Fig. 17). While lowering support
bracket, disconnect LDP wiring clip (Fig. 20).
(6) Disconnect electrical connector at LDP (Fig.
20).
(7) Carefully remove vapor/vacuum lines at LDP
(Fig. 20).
(8) Remove LDP.
INSTALLATION
The LDP is located in the left quarter panel behind
the left/rear wheel. It is attached to a two-piece sup-
port bracket (Fig. 17). The LDP and LDP filter are
replaced (serviced) as one unit.
(1) Position LDP and carefully install vapor/vac-
uum lines to LDP and LDP filter.The vapor/vac-
uum lines and hoses must be firmly connected.
Fig. 16 LOCATION, LDP / EVAP CANISTER
1 - LEAK DETECTION PUMP
2 - EVAP CANISTER
WJEVAPORATIVE EMISSIONS 25 - 35
LEAK DETECTION PUMP (Continued)