JEEP CHEROKEE 1994 Service Repair Manual

Mark the tire to indicate the high spot. Place a mark
on the tire at the valve stem location (Fig. 5).
(2) Break down the tire and remount it 180 de-
grees on the rim (Fig. 6).
(3) Measure the total indicator runout again. Mark
the tire to indicate the high spot.
(4) If runout is still excessive, the following proce-
dures must be done.
²If the high spot is within 101.6 mm (4.0 in.) of the
first spot and is still excessive, replace the tire.²If the high spot is within 101.6 mm (4.0 in.) of the
first spot on the wheel, the wheel may be out of spec-
ifications. Refer to Wheel and Tire Runout.
²If the high spot is NOT within 101.6 mm (4.0 in.)
of either high spot, draw an arrow on the tread from
second high spot to first. Break down the tire and re-
mount it 90 degrees on the rim in that direction (Fig.
7). This procedure will normally reduce the runout to
an acceptable amount.
TIRE AND WHEEL RUNOUT
Radial runout is the difference between the high
and low points on the tire or wheel (Fig. 8).
Lateral runout is thewobbleof the tire or wheel.
Fig. 5 First Measurement On Tire
Fig. 6 Remount Tire 180 Degrees
Fig. 7 Remount Tire 90 Degrees In Direction of
Arrow
Fig. 8 Checking Tire Runout
22 - 8 WHEELS AND TIRESJ

Radial runout of more than 1.5 mm (.060 inch)
measured at the center line of the tread may cause
the vehicle to shake.
Lateral runout of more than 2.0 mm (.080 inch)
measured near the shoulder of the tire may cause the
vehicle to shake.
Sometimes radial runout can be reduced. Relocate
the wheel and tire assembly on the mounting studs
(See Method 1). If this does not reduce runout to an
acceptable level, the tire can be rotated on the wheel.
(See Method 2).
METHOD 1 (RELOCATE WHEEL ON HUB)
Check accuracy of the wheel mounting surface; ad-
just wheel bearings.
Drive vehicle a short distance to eliminate tire flat
spotting from a parked position.
Make sure all wheel nuts are properly torqued.
Relocate wheel on the mounting, two studs over
from the original position.
Re-tighten wheel nuts until all are properly
torqued, to eliminate brake distortion.
Check radial runout. If still excessive, mark tire
sidewall, wheel, and stud at point of maximum
runout and proceed to Method 2.
METHOD 2 (RELOCATE TIRE ON WHEEL)
Rotating tire on wheel is particularly effective
when there is runout in both tire and wheel.Remove tire from wheel and re-mount wheel on
hub in former position.
Check wheel radial runout (Fig. 9).
²STEEL WHEELS: Radial runout 0.040 in., Lateral
runout 0.045 in.
²ALUMINUM WHEELS: Radial runout 0.030 in.,
Lateral runout 0.035 in.
If point of greatest runout is near original chalk
mark, remount tire 180 degrees. Recheck runout.
VEHICLE VIBRATION
Vehicle vibration can be caused by:
²Tire/wheel unbalance or excessive runout
²Defective tires with extreme tread wear
²Nylon overlay flat spots (performance tires only)
²Incorrect wheel bearing adjustment (if applicable)
²Loose or worn suspension/steering components
²Certain tire tread patterns
²Incorrect drive shaft angles or excessive drive
shaft/yoke runout
²Defective or worn U-joints
²Excessive brake rotor or drum runout
²Loose engine or transmission supports/mounts
²And by engine operated accessories
Refer to the appropriate Groups in this man-
ual for additional information.
VIBRATION TYPES
There are two types of vehicle vibration:
²Mechanical
²Audible.
Mechanical vehicle vibration can be felt through
the seats, floor pan and/or steering wheel.
Audible vehicle vibration is heard above normal
background noise. The sound can be a droning or
drumming noise.Vibrations are sensitive to change in engine
torque, vehicle speed or engine speed.
ENGINE TORQUE SENSITIVE VIBRATION
This vibration can be increased or decreased by:
²Accelerating
²Decelerating
²Coasting
²Maintaining a constant vehicle speed
VEHICLE SPEED SENSITIVE VIBRATION
This vibration condition always occurs at the same
vehicle speed regardless of the engine torque or en-
gine speed.
ENGINE SPEED (RPM) SENSITIVE VIBRATION
This vibration occurs at varying engine speeds. It
can be isolated by increasing or decreasing the en-
gine speed with the transmission in NEUTRAL posi-
tion.
VIBRATION DIAGNOSIS
A vibration diagnosis should always begin with a
10 mile (16 km) trip (to warm the vehicle and tires).
Then a road test to identify the vibration. Corrective
Fig. 9 Checking Wheel Runout
JWHEELS AND TIRES 22 - 9

action should not be attempted until the vibration
type has been identified via a road test.
During the road test, drive the vehicle on a smooth
surface. If vibration exists, note and record the fol-
lowing information:
²Identify the vehicle speed range when the vibra-
tion occurs
²Identify the type of vibration
²Identify the vibration sensitivity
²Determine if the vibration is affected by changes
in vehicle speed, engine speed and engine torque.
When the vibration has been identified, refer to the
Vibration Diagnosis chart for causes. Consider cor-
recting only those causes coded in the chart that are
related to the vibration condition.
Refer to the following cause codes and descriptions
for explanations when referring to the chart.
TRRÐTire and Wheel Radial Runout:Vehicle
speed sensitive, mechanical vibration. The runout
will not cause vibration below 20 mph (32 km/h).
WHÐWheel Hop:Vehicle speed sensitive, me-
chanical vibration. The wheel hop generates rapid
up-down movement in the steering wheel. The vibra-
tion is most noticeable in the 20 - 40 mph (32 - 64
km/h) range. The wheel hop will not cause vibration
below 20 mph (32 km/h). Wheel hop is caused by a
tire/wheel that has a radial runout of more than
0.045 of-an-inch (1.14 mm). If wheel runout is accept-able and combined runout cannot be reduced by re-
positioning the tire on wheel, replace tire.
TBÐTire/Wheel Balance:Vehicle speed sensitive,
mechanical vibration. Static tire/wheel unbalance
will not cause vibration below 30 mph (46 km/h). Dy-
namic tire/wheel unbalance will not cause vibration
below 40 mph (64 km/h).
TLRÐTire/Wheel Lateral runout:Vehicle speed
sensitive, mechanical vibration. The runout will not
cause vibration below 50 - 55 mph (80 - 88 km/h).
Excessive lateral runout will also cause front-end
shimmy.
TWÐTire Wear:Vehicle speed sensitive, audible
vibration. Abnormal tire wear causes small vibration
in the 30 - 55 mph (88 km/h) range. This will pro-
duce a whine noise at high speed. The whine will
change to a growl noise when the speed is reduced.
WÐTire Waddle:Vehicle speed sensitive, mechan-
ical vibration. Irregular tire uniformity can cause
side-to-side motion during speeds up to 15 mph (24
km/h). If the motion is excessive, identify the defec-
tive tire and replace it.
UAJÐUniversal Joint (Drive Shaft) Angles:
Torque/vehicle speed sensitive, mechanical/audible
vibration. Incorrect drive shaft angles cause mechan-
ical vibration below 20 mph (32 km/h) and in the 70
VIBRATION DIAGNOSIS
22 - 10 WHEELS AND TIRESJ

mph (112 km/h) range. The incorrect angles can also
produce an audible vibration in the 20 - 50 mph (32 -
80 km/h) range. Caster adjustment could be required
to correct the angles.
UJÐUniversal Joints:Engine torque/vehicle
speed sensitive, mechanical/audible vibration. If the
U-joint is worn it will cause vibration with almost
any vehicle speed/engine torque condition.
DSYÐDrive Shaft and Yokes:Vehicle speed sen-
sitive, mechanical/audible vibration. The condition
will not cause vibration below 35 mph (56 km/h). Ex-
cessive runout, unbalance or dents and bends in the
shaft will cause the vibration. Identify the actual
cause and repair/replace as necessary.
WBÐWheel Bearings:Vehicle speed sensitive,
mechanical/audible vibration. Loose wheel bearings
cause shimmy-like vibration at 35 mph (56 km/h)
and above. Worn bearings will also produce a growl
noise at low vehicle speed and a whine noise at high
vehicle speed. The wheel bearings must be adjusted
or replaced, as applicable.
ANÐAxle Noise:Engine torque/vehicle speed sen-
sitive, mechanical/audible vibration. The axle will not
cause mechanical vibration unless the axle shaft is
bent. Worn or damaged axle pinion shaft or differen-
tial gears and bearings will cause noise. Replace the
defective component(s) as necessary.
SSCÐSuspension and Steering Components:
Vehicle speed sensitive, mechanical vibration. Wornsuspension/steering components can cause mechani-
cal vibration at speeds above 20 mph (32 km/h).
Identify and repair or replace the defective compo-
nent(s).
EAÐEngine Driven Accessories:Engine speed
sensitive, mechanical/audible vibration. Vibration can
be caused by loose or broken A/C compressor, PS
pump, water pump, generator or brackets, etc. Usu-
ally more noticeable when the transmission is shifted
into the NEUTRAL position and the engine speed
(rpm) increased. Inspect the engine driven accesso-
ries in the engine compartment. Repair/replace as
necessary.
ADBÐAccessory Drive Belts:Engine speed sen-
sitive, audible vibration. Worn drive belts can cause a
vibration that produces either a droning, fluttering or
rumbling noise. Inspect the drive belt(s) and tighten/
replace as necessary.
DEMÐDamaged Engine or Transmission Sup-
port Mounts:Engine speed sensitive, mechanical/
audible vibration. If a support mount is worn, noise
or vibration will occur. Inspect the support mounts
and repair/replace as necessary.
ESÐExhaust System:Engine speed sensitive,
mechanical/audible vibration. If loose exhaust compo-
nents contact the vehicle body they will cause noise
and vibration. Inspect the exhaust system for loose,
broken and mis-aligned components and repair/re-
place as necessary.
SPECIFICATIONS
WHEEL LUG NUT
JWHEELS AND TIRES 22 - 11

BODY COMPONENTSÐXJ VEHICLES
CONTENTS
page page
DOORS............................... 34
EXTERIOR COMPONENTS................. 3
FIXED WINDOW GLASS................. 73GENERAL BODY SERVICE INFORMATION.... 1
INTERIOR COMPONENTS................ 91
UNDERBODY COMPONENTS.............. 84
GENERAL BODY SERVICE INFORMATION
RIGHT HAND DRIVE VEHICLES
The XJ Body Components procedures in this sec-
tion were developed on a left hand drive (LHD) vehi-
cle. Unless a component is unique to a right hand
drive vehicle, it will not be specifically covered in
this section, i.e. cargo barrier. In general, compo-
nents on left hand drive vehicles will be located on
the opposite side in right hand drive vehicles.
LABELS/DECALS/PLATES
Most of the labels that are affixed to the vehicles
(Figs. 1 through 5) contain safety or maintenance in-
formation. If a body component or window glass are
replaced, a replacement label should be installed. In
most cases, label location on right hand drive (RHD)
vehicles will be on the opposite side of the vehicle.
Refer to the Introduction of this manual for more
information involving labels and plates.
INSTALLATION
Follow the instructions included with each replace-
ment label.
Fig. 1 XJ Underhood & Window Glass Labels/Decals
Fig. 2 XJ Exterior Labels/Decals
Fig. 3 XJ Interior Labels/Decals
JBODY COMPONENTSÐXJ VEHICLES 23 - 1

KEY LOCK CYLINDERS
The ignition switch, glove box door, front doors and
liftgate all have key lock cylinders (Fig. 6). When
lock cylinder access or replacement is necessary, re-
fer to the applicable service information source:
²Ignition SwitchÐGroup 8D,
²Instrument Panel,
²Front Doors, and
²Liftgate.
Fig. 4 XJ VIN PlateFig. 5 XJ Jack Usage & Storage Instruction Labels
Fig. 6 Ignition Switch & Glove Box Door Key Lock
Cylinders
23 - 2 BODY COMPONENTSÐXJ VEHICLESJ

EXTERIOR COMPONENTS
BRUSH GUARD
REMOVAL
(1) Remove the bolts and washers that attach the
brush guard (Fig. 1) to the side sills.
(32 Remove the nuts and washers that the attach
brush guard to the bumper. Remove the brush guard
from the bumper.
INSTALLATION
(1) Position and support the brush guard on the
bumper. Install the attaching washers and nuts.
Do not tighten the nuts until the brush guard is
properly positioned on the vehicle and aligned.
(2) Install the bolts and washers to attach the
brush guard to side sills.
(3) Align the brush guard and tighten the bolts.
GRILLE AND GRILLE OPENING PANEL (GOP)
REMOVAL
(1) Remove the screws and grille (Fig. 2) from the
grille opening panel (GOP).
(2) Remove the screws, side marker lenses and the
headlamp bezels from the grille opening panel (GOP)
(Fig. 3).
(3) Remove the headlamps and park/turn signal
lamps from the GOP (Fig. 4).
(4) Open the hood.
(5) Remove the nuts that attach the grille opening
panel (GOP) to the bracket on radiator support cross-
member.
(6) Remove the nuts that attach the grille opening
panel (GOP) to the front fenders (Fig.5).
Fig. 2 Grille & GOP
Fig. 1 Brush Guard Removal/Installation
JBODY COMPONENTSÐXJ VEHICLES 23 - 3

(7) Remove the screws that attach the grille open-
ing panel (GOP) support bracket to the front sill
crossmember (Fig. 6).
(8) Pull the grille opening panel (GOP) forward
and disconnect the clips and all the front lamp har-
ness connectors (Fig. 7).(9) Remove the grille opening panel (GOP) from
the vehicle.
(10) If necessary, remove the air inlet baffles from
GOP (Fig. 8).
Fig. 3 Side Marker Lamp Removal/Installation
Fig. 4 Headlamp & Park/Turn Signal Lamp Removal/
Installation
Fig. 5 GOP Attaching Nuts At Front Fender
Fig. 6 Crossmember-to-GOP Support Bracket
Fig. 7 Front Lamp Wire Harness Connectors
Fig. 8 GOP Air Inlet Baffles
23 - 4 BODY COMPONENTSÐXJ VEHICLESJ

INSTALLATION
(1) Place the grille opening panel (GOP) on bumper
and connect all front lamp wire harness connectors.
(2) Position the grille opening panel (GOP) on the
vehicle and install the side and upper nuts. Tighten
nuts to 7 Nzm (58 in-lbs) torque.
(3) Install the screw to attach grille opening panel
(GOP) to the crossmember support bracket. Tighten
the screw to 1 Nzm (11 in-lbs) torque.
(4) Install headlamps and park/turn signal lamps
in GOP.(5) Install the headlamp bezels on the GOP.
Tighten the screws to 1 Nzm (13 in-lbs) torque.
(6) Install the side marker lenses and screws on
the grille opening panel (GOP). Tighten the screws to
1Nzm (13 in-lbs) torque.
(7) Install the grille on the GOP. Tighten screws to
1Nzm (13 in-lbs) torque.
(8) Adjust the headlamp aim, if necessary. Refer to
the headlamp beam adjustment procedure within
Group 8L.
RADIATOR SUPPORT CROSSMEMBER
REMOVAL
(1) Remove the grille opening panel (GOP) (Fig. 2).
(2) For 2.5L engines, remove the power steering
pump reservoir from the left filler panel (Fig. 9).
(3) Remove the radiator support crossmember and
radiator from the front of vehicle (Fig. 10).
(4) If additional disassembly is required, remove
the horns, baffle braces and the wire harnesses from
the baffles (Fig. 11).
INSTALLATION
(1) If removed, install the horns, baffle braces and
the wire harnesses on the baffles (Fig. 11).
(2) Position the radiator and the radiator support
Fig. 9 P/S Pump Reservoir Removal/Installation
Fig. 10 Radiator Support Crossmember & Modular Radiator
JBODY COMPONENTSÐXJ VEHICLES 23 - 5