2002 JEEP GRAND CHEROKEE Hose

POSITION SENSOR
DESCRIPTION
The transfer case position sensor (Fig. 95) is an
electronic device whose output can be interpreted to
indicate the transfer case's current operating mode.
The sensor consists of a five position, resistive multi-
plexed circuit which returns a specific resistance
value to the Powertrain Control Module (PCM) for
each transfer case operating mode. The sensor is
located on the top of the transfer case, just left of the
transfer case centerline and rides against the sector
plate roostercomb. The PCM supplies 5VDC (+/-
0.5V) to the sensor and monitors the return voltage
to determine the sector plate, and therefore the
transfer case, position.
OPERATION
During normal vehicle operation, the Powertrain
Control Module (PCM) monitors the transfer case
position sensor return voltage to determine the oper-
ating mode of the transfer case. Refer to the Operat-
ing Mode Versus Resistance table for the correct
resistance for each position (Fig. 96).
OPERATING MODE VERSUS RESISTANCE
SENSOR POSITION OPERATING MODE SENSOR RESISTANCE (ohms)
1 2WD 1124-1243
2 4WD PART TIME 650-719
3 4WD FULL TIME 389-431
4 NEUTRAL 199-221
5 4WD LOW 57-64
Fig. 96 Position Sensor Linear Movement
1 - POSITION 1 - 10mm  0.5mm
2 - POSITION 2 - 12mm  0.5mm
3 - POSITION 3 - 14mm  0.5mm
4 - POSITION 4 - 16mm  0.5mm
5 - POSITION 5 - 18mm  0.5mm
6 - POSITION 6 - 20mm 0.5mm - FULL EXTENSION
Fig. 95 Transfer Case Position Sensor and
Connector
1 - TRANSFER CASE POSITION SENSOR CONNECTOR
2 - TRANSFER CASE POSITION SENSOR
3 - TRANSFER CASE
4 - OUTPUT SPEED SENSOR CONNECTOR
WJTRANSFER CASE - NV242 21 - 311

CONDITION POSSIBLE CAUSE CORRECTION
NOISY INÐOR JUMPS OUT OF
4WD LOW RANGE1. Transfer case not completely
engaged in 4WD LOW (possibly
from shift to 4L while rolling)1. Stop vehicle, shift transfer case
to neutral, then shift back to 4WD
LOW
2. Shift linkage loose, binding, or is
misadjusted2. Tighten, lubricate, or repair
linkage as necessary. Adjust linkage
if necessary
3. Range fork cracked, inserts
worn, or fork is binding on shift rail3. Disassemble unit and repair as
necessary
4. Annulus gear or lockplate worn
or damaged4. Disassemble unit and repair as
necessary
LUBRICANT LEAKING FROM
OUTPUT SHAFT SEALS OR FROM
VENT1. Transfer case over filled 1. Drain to correct level
2. Vent closed or restricted 2. Clear or replace vent if necessary
3. Output shaft seals damaged or
installed correctly3. Replace seals. Be sure seal lip
faces interior of case when installed.
Also be sure yoke seal surfaces are
not scored or nicked. Remove
scores and nicks with fine
sandpaper or replace yoke(s) if
necessary.
REMOVAL
(1) Shift transfer case into NEUTRAL.
(2) Raise vehicle.
(3) Remove transfer case drain plug and drain
transfer case lubricant.
(4) Mark front and rear propeller shaft yokes for
alignment reference.
(5) Support transmission with jack stand.
(6) Remove rear crossmember and skid plate, if
equipped (Fig. 4).
(7) Disconnect front propeller shaft from transfer
case at companion flange. Remove rear propeller
shaft from vehicle. (Refer to 3 - DIFFERENTIAL &
DRIVELINE/PROPELLER SHAFT/PROPELLER
SHAFT - REMOVAL)
CAUTION: Do not allow propshafts to hang at
attached end. Damage to joint can result.
(8) Disconnect transfer case cable from range
lever.
(9) Disconnect transfer case vent hose (Fig. 5).
(10) Support transfer case with transmission jack.
(11) Secure transfer case to jack with chains.
(12) Remove nuts attaching transfer case to trans-
mission.
(13) Pull transfer case and jack rearward to disen-
gage transfer case (Fig. 5).
(14) Remove transfer case from under vehicle.
DISASSEMBLY
Position transfer case on shallow drain pan.
Remove drain plug and drain lubricant remaining in
case.
Fig. 4 Crossmember Removal
1 - CROSSMEMBER
2 - REAR TRANSMISSION MOUNT
WJTRANSFER CASE - NV247 21 - 317
TRANSFER CASE - NV247 (Continued)

²Unsatisfactory ride
²Vehicle drift
For proper tire pressure specification refer to the
Tire Inflation Pressure Chart provided with the vehi-
cles Owners Manual. A Certification Label on the
drivers side door pillar provides the minimum tire
and rim size for the vehicle. The label also list the
cold inflation pressure for these tires at full load
operation
Tire pressures have been chosen to provide safe
operation, vehicle stability, and a smooth ride. Tire
pressure should be checked cold once a month. Tire
pressure decreases as the ambient temperature
drops. Check tire pressure frequently when ambient
temperature varies widely.
Tire inflation pressures are cold inflation pressure.
The vehicle must sit for at least 3 hours to obtain the
correct cold inflation pressure reading. Or be drivenless than one mile after sitting for 3 hours. Tire
inflation pressures may increase from 2 to 6 pounds
per square inch (psi) during operation. Do not reduce
this normal pressure build-up.
WARNING: OVER OR UNDER INFLATED TIRES CAN
AFFECT VEHICLE HANDLING AND TREAD WEAR.
THIS MAY CAUSE THE TIRE TO FAIL SUDDENLY,
RESULTING IN LOSS OF VEHICLE CONTROL.
DESCRIPTION - TIRE PRESSURE FOR HIGH
SPEED
Where speed limits allow the vehicle to be driven
at high speeds, correct tire inflation pressure is very
important. For speeds up to and including 120 km/h
(75 mph), tires must be inflated to the pressures
shown on the tire placard. For continuous speeds in
excess of 120 km/h (75 mph), tires must be inflated
to the maximum pressure specified on the tire side-
wall.
Vehicles loaded to the maximum capacity should
not be driven at continuous speeds above 75 mph
(120 km/h).
For emergency vehicles that are driven at speeds
over 90 mph (144 km/h), special high speed tires
must be used. Consult tire manufacturer for correct
inflation pressure recommendations.
DESCRIPTION - REPLACEMENT TIRES
The original equipment tires provide a proper bal-
ance of many characteristics such as:
²Ride
²Noise
²Handling
²Durability
²Tread life
²Traction
²Rolling resistance
²Speed capability
It is recommended that tires equivalent to the orig-
inal equipment tires be used when replacement is
needed.
Failure to use equivalent replacement tires may
adversely affect the safety and handling of the vehi-
cle.
The use of oversize tires may cause interference
with vehicle components. Under extremes of suspen-
sion and steering travel, interference with vehicle
components may cause tire damage.
WARNING: FAILURE TO EQUIP THE VEHICLE WITH
TIRES HAVING ADEQUATE SPEED CAPABILITY
CAN RESULT IN SUDDEN TIRE FAILURE.
Fig. 13 Under Inflation Wear
1 - THIN TIRE THREAD AREAS
Fig. 14 Over Inflation Wear
1 - THIN TIRE THREAD AREA
WJTIRES/WHEELS 22 - 7
TIRES (Continued)

BODY
TABLE OF CONTENTS
page page
BODY
DIAGNOSIS AND TESTING
WATER LEAKS........................1
WIND NOISE..........................2
STANDARD PROCEDURE
STANDARD PROCEDURE - BODY
LUBRICATION.........................2
STANDARD PROCEDURE - DRILLING AND
WELDING............................3
SPECIFICATIONS
BODY LUBRICANTS....................3
SPECIFICATIONS - TORQUE.............4
SPECIAL TOOLS
BODY...............................4DECKLID/HATCH/LIFTGATE/TAILGATE........5
DOOR - FRONT.........................11
DOORS - REAR.........................19
EXTERIOR.............................25
HOOD.................................33
INSTRUMENT PANEL SYSTEM.............36
INTERIOR..............................69
PAINT.................................81
SEATS................................83
STATIONARY GLASS.....................93
SUNROOF.............................96
WEATHERSTRIP/SEALS..................105
BODY STRUCTURE.....................112
BODY
DIAGNOSIS AND TESTING
WATER LEAKS
Water leaks can be caused by poor sealing,
improper body component alignment, body seam
porosity, missing plugs, or blocked drain holes. Cen-
trifugal and gravitational force can cause water to
drip from a location away from the actual leak point,
making leak detection difficult. All body sealing
points should be water tight in normal wet-driving
conditions. Water flowing downward from the front of
the vehicle should not enter the passenger or luggage
compartment. Moving sealing surfaces will not
always seal water tight under all conditions. At
times, side glass or door seals will allow water to
enter the passenger compartment during high pres-
sure washing or hard driving rain (severe) condi-
tions. Overcompensating on door or glass
adjustments to stop a water leak that occurs under
severe conditions can cause premature seal wear and
excessive closing or latching effort. After completing
a repair, water test vehicle to verify leak has stopped
before returning vehicle to use.
VISUAL INSPECTION BEFORE WATER LEAK TESTS
Verify that floor and body plugs are in place, body
drains are clear, and body components are properly
aligned and sealed. If component alignment or seal-
ing is necessary, refer to the appropriate section of
this group for proper procedures.
WATER LEAK TESTS
WARNING: DO NOT USE ELECTRIC SHOP LIGHTS
OR TOOLS IN WATER TEST AREA. PERSONAL
INJURY CAN RESULT.
When the conditions causing a water leak have
been determined, simulate the conditions as closely
as possible.
²If a leak occurs with the vehicle parked in a
steady light rain, flood the leak area with an open-
ended garden hose.
²If a leak occurs while driving at highway speeds
in a steady rain, test the leak area with a reasonable
velocity stream or fan spray of water. Direct the
spray in a direction comparable to actual conditions.
²If a leak occurs when the vehicle is parked on an
incline, hoist the end or side of the vehicle to simu-
late this condition. This method can be used when
the leak occurs when the vehicle accelerates, stops or
turns. If the leak occurs on acceleration, hoist the
front of the vehicle. If the leak occurs when braking,
hoist the back of the vehicle. If the leak occurs on left
turns, hoist the left side of the vehicle. If the leak
occurs on right turns, hoist the right side of the vehi-
cle. For hoisting recommendations refer to Group 0,
Lubrication and Maintenance, General Information
section.
WATER LEAK DETECTION
To detect a water leak point-of-entry, do a water
test and watch for water tracks or droplets forming
on the inside of the vehicle. If necessary, remove inte-
rior trim covers or panels to gain visual access to the
WJBODY 23 - 1

leak area. If the hose cannot be positioned without
being held, have someone help do the water test.
Some water leaks must be tested for a considerable
length of time to become apparent. When a leak
appears, find the highest point of the water track or
drop. The highest point usually will show the point of
entry. After leak point has been found, repair the
leak and water test to verify that the leak has
stopped.
Locating the entry point of water that is leaking
into a cavity between panels can be difficult. The
trapped water may splash or run from the cavity,
often at a distance from the entry point. Most water
leaks of this type become apparent after accelerating,
stopping, turning, or when on an incline.
MIRROR INSPECTION METHOD
When a leak point area is visually obstructed, use
a suitable mirror to gain visual access. A mirror can
also be used to deflect light to a limited-access area
to assist in locating a leak point.
BRIGHT LIGHT LEAK TEST METHOD
Some water leaks in the luggage compartment can
be detected without water testing. Position the vehi-
cle in a brightly lit area. From inside the darkened
luggage compartment inspect around seals and body
seams. If necessary, have a helper direct a drop light
over the suspected leak areas around the luggage
compartment. If light is visible through a normally
sealed location, water could enter through the open-
ing.
PRESSURIZED LEAK TEST METHOD
When a water leak into the passenger compart-
ment cannot be detected by water testing, pressurize
the passenger compartment and soap test exterior of
the vehicle. To pressurize the passenger compart-
ment, close all doors and windows, start engine, and
set heater control to high blower in HEAT position. If
engine can not be started, connect a charger to the
battery to ensure adequate voltage to the blower.
With interior pressurized, apply dish detergent solu-
tion to suspected leak area on the exterior of the
vehicle. Apply detergent solution with spray device or
soft bristle brush. If soap bubbles occur at a body
seam, joint, seal or gasket, the leak entry point could
be at that location.
WIND NOISE
Wind noise is the result of most air leaks. Air leaks
can be caused by poor sealing, improper body compo-
nent alignment, body seam porosity, or missing plugs
in the engine compartment or door hinge pillar areas.
All body sealing points should be airtight in normal
driving conditions. Moving sealing surfaces will notalways seal airtight under all conditions. At times,
side glass or door seals will allow wind noise to be
noticed in the passenger compartment during high
cross winds. Over compensating on door or glass
adjustments to stop wind noise that occurs under
severe conditions can cause premature seal wear and
excessive closing or latching effort. After a repair pro-
cedure has been performed, test vehicle to verify
noise has stopped before returning vehicle to use.
Wind noise can also be caused by improperly fitted
exterior moldings or body ornamentation. Loose
moldings can flutter, creating a buzzing or chattering
noise. An open cavity or protruding edge can create a
whistling or howling noise. Inspect the exterior of the
vehicle to verify that these conditions do not exist.
VISUAL INSPECTION BEFORE TESTS
Verify that floor and body plugs are in place and
body components are aligned and sealed. If compo-
nent alignment or sealing is necessary, refer to the
appropriate section of this group for proper proce-
dures.
ROAD TESTING WIND NOISE
(1) Drive the vehicle to verify the general location
of the wind noise.
(2) Apply 50 mm (2 in.) masking tape in 150 mm
(6 in.) lengths along weatherstrips, weld seams or
moldings. After each length is applied, drive the vehi-
cle. If noise goes away after a piece of tape is applied,
remove tape, locate, and repair defect.
POSSIBLE CAUSE OF WIND NOISE
²Moldings standing away from body surface can
catch wind and whistle.
²Gaps in sealed areas behind overhanging body
flanges can cause wind-rushing sounds.
²Misaligned movable components.
²Missing or improperly installed plugs in pillars.
²Weld burn through holes.
STANDARD PROCEDURE
STANDARD PROCEDURE - BODY LUBRICATION
All mechanisms and linkages should be lubricated
when necessary. This will maintain ease of operation
and provide protection against rust and excessive
wear. The weatherstrip seals should be lubricated to
prolong their life as well as to improve door sealing.
All applicable exterior and interior vehicle operat-
ing mechanisms should be inspected and cleaned.
Pivot/sliding contact areas on the mechanisms should
then be lubricated.
(1) When necessary, lubricate the operating mech-
anisms with the specified lubricants.
23 - 2 BODYWJ
BODY (Continued)

LIFTGATE
REMOVAL
CAUTION: DO NOT DISCONNECT THE SUPPORT ROD
CYLINDERS WITH THE LIFTGATE CLOSED. THE SUP-
PORT ROD PISTONS ARE OPERATED BY HIGH PRES-
SURE GAS. THIS PRESSURE COULD CAUSE DAMAGE
AND /OR PERSONAL INJURY IF THEY ARE REMOVED
WHILE THE PISTONS ARE COMPRESSED.
(1) Open the liftgate. Support the liftgate for ease
of repair.
(2) Remove the liftgate trim panel.
(3) Remove the prop rods from the liftgate.
(4) Unplug the wire harnesses and disconnect the
washer hose.
(5) Mark the hinge location with a wax pencil or
other suitable device (Fig. 5).
(6) Remove the hinge screws and remove liftgate
from vehicle.
INSTALLATION
(1) Position the liftgate on the vehicle and align
the witness marks.
(2) Install the hinge screws at liftgate. Tighten
hinge screws to 28N´m (21ft. lbs.).
(3) Connect the wire harnesses and the washer
hose.
(4) Install the trim panel.
(5) Install the prop rods.
(6) Close the liftgate and check for proper latching
and alignment.
ADJUSTMENTS
LIFTGATE ADJUSTMENT
The position of the liftgate can be adjusted upward
or downward by the use of slots in the hinge. An
inward or outward adjustment is achieved by use of
slots in the body. If an inward or outward adjustment
is needed, use 3MŸ Fast and Firm or equivalent on
the hinge to body mating surface as a sealant.
TRIM PANEL
REMOVAL
REMOVAL - LIFTGATE TRIM PANEL
NOTE: The liftgate trim panel is attached with
screws and spring clips.
(1) Raise the liftgate.
(2) Remove the screws securing the liftgate trim
panel to the liftgate (Fig. 6).
(3) Disconnect the rear window defroster wires.
(4) Using a trim stick, or other suitable tool, pry
the liftgate trim panel off the liftgate.
Fig. 5 Liftgate
1 - HINGE
2 - LIFTGATE
Fig. 6 Liftgate Trim Panel
1 - LIFTGATE
2 - LIFTGATE TRIM PANEL
WJDECKLID/HATCH/LIFTGATE/TAILGATE 23 - 9

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

(6) Install the sun visors (Refer to 23 - BODY/IN-
TERIOR/SUN VISOR - INSTALLATION).
(7) Install the overhead console, if equipped.
(8) Install the rear cargo/dome lamp.
(9) Install the D pillar trim (Refer to 23 - BODY/
INTERIOR/D-PILLAR TRIM - INSTALLATION).(10) Install the C pillar trim (Refer to 23 - BODY/
INTERIOR/C-PILLAR TRIM - INSTALLATION).
(11) Install the upper B pillar trim (Refer to 23 -
BODY/INTERIOR/B-PILLAR UPPER TRIM -
INSTALLATION).
(12) Install the A pillar trim (Refer to 23 - BODY/
INTERIOR/A-PILLAR TRIM - INSTALLATION).
(13) Connect the negative battery cable.
Fig. 11 Headliner
1 - SUNROOF PINCH WELT
2 - ROOF
3 - REAR WASHER HOSE4 - HEADLINER
5 - SUNROOF
23 - 78 INTERIORWJ
HEADLINER (Continued)