1994 JEEP CHEROKEE spare tire

ABS BRAKE DIAGNOSIS
INDEX
page page
ABS Fault Diagnosis....................... 4
ABS System Wiring and Electrical Circuits...... 4
ABS Warning Light Display.................. 3
Brake Warning Light Display................. 4
Diagnosis Procedures...................... 3
ECU Diagnosis........................... 4
HCU Diagnosis........................... 4Loss of Sensor Input....................... 3
Operating Sound Levels.................... 3
Rear Speed Sensor Air Gap................. 3
Steering Response........................ 3
Vehicle Response in Antilock Mode............ 3
Wheel/Tire Size and Input Signals............. 3
DIAGNOSIS PROCEDURES
ABS diagnosis involves three basic steps. First is
observation of the warning light display. Second is a
visual examination for low fluid level, leaks, parking
brakes applied, or obvious damage to system compo-
nents or wires. The third step involves using the
DRB II scan tool to identify a faulty component.
The visual examination requires a check of reser-
voir fluid level and all system components. Things to
look for are leaks, loose connections, or obvious com-
ponent damage.
The final diagnosis step involves using the DRB II
scan tool to determine the specific circuit or compo-
nent at fault. The tester is connected to the ABS di-
agnostic connector in the passenger compartment.
The connector is at the driver side of the center con-
sole under the instrument panel. Refer to the DRB II
scan tool Manual for tester procedures. Also refer to
the ABS Fault Diagnosis charts at the end of this
section for additional diagnosis information.
Initial faults should be cleared and the vehicle road
tested to reset any faults that remain in the system.
Faults can be cleared with the DRB II scan tool.
REAR SPEED SENSOR AIR GAP
The front wheel sensors are fixed and cannot be ad-
justed. Only the rear sensor air gap is adjustable. Air
gap must be set with a brass feeler gauge.
Correct air gap is important to proper signal gen-
eration. An air gap that is too large may cause com-
plete loss of sensor input. Or, a gap that is too small
could produce a false input signal, or damaging con-
tact between the sensor and tone ring.
WHEEL/TIRE SIZE AND INPUT SIGNALS
Antilock system operation is dependant on accurate
signals from the wheel speed sensors. Ideally, the ve-
hicle wheels and tires should all be the same size
and type. However, the Jeep ABS system is designed
to function with a compact spare tire installed.
OPERATING SOUND LEVELS
The ABS pump and solenoid valves may produce
some sound as they cycle on and off. This is a normal
condition and should not be mistaken for faulty oper-
ation.
VEHICLE RESPONSE IN ANTILOCK MODE
During antilock braking, the HCU solenoid valves
cycle rapidly in response to ECU inputs.
The driver will experience a pulsing sensation
within the vehicle as the solenoids decrease, hold, or
increase pressure as needed. A pulsing brake pedal
will also be noted.
The pulsing sensation occurs as the solenoids cycle
during antilock mode braking. A slight pulse in the
brake pedal may also be noted during the dynamic
self check part of system initialization.
STEERING RESPONSE
A modest amount of steering input is required dur-
ing extremely high deceleration braking, or when
braking on differing traction surfaces. An example of
differing traction surfaces would be when the left
side wheels are on ice and the right side wheels are
on dry pavement.
LOSS OF SENSOR INPUT
Sensor malfunctions will most likely be due to
loose connections, damaged sensor wires, incorrect
rear sensor air gap, or a malfunctioning sensor. Ad-
ditional causes of sensor faults would be sensor and
tone ring misalignment or damage.
ABS WARNING LIGHT DISPLAY
ABS Light Illuminates At Startup
The amber ABS light illuminates at startup as
part of the system self check feature. The light illu-
minates for 2-3 seconds then goes off as part of the
normal self check routine.
ABS Light Remains On After Startup
An ABS system fault is indicated when the light
remains on after startup. Diagnosis with the DRB II
JBRAKES 5 - 3

CENTER HIGH MOUNTED STOP LAMP (CHMSL)ÐYJ
The CHMSL is mounted on top of a bracket that
attaches to the spare tire carrier (Fig. 30).
(1) Remove the CHMSL lens (Fig. 31).(2) Remove CHMSL lamp housing (Fig. 32)
(5) Replace bulbs if necessary.
To install, reverse removal procedure.
Fig. 30 Center High Mounted Stop Lamp (CHMSL) Bracket Assembly
Fig. 29 Replacing CHMSL Bulb
Fig. 31 Removing CHMSL Access Door
JLAMPS 8L - 11

(2) Install the screws that attach the bracket to
the frame rail. Tighten the screws to 42 Nzm (31 ft-
lbs) torque.
(3) Install the fuel filter in the bracket.
(4) Position the clamp on the bracket and install
bolt and nut. Tighten the nut to 8 Nzm (72 in-lbs)
torque.
(5) Position the fuel filter shield from the frame
rail.
(6) Install the screws that attach the fuel filter
shield to the frame rail. Tighten the screws to 42
Nzm (31 ft-lbs) torque.
REAR JOUNCE BUMPER
REMOVAL
(1) Remove the screws that attach the jounce
bumper to the frame rail (Fig. 12).
(2) Remove the jounce bumper from the frame rail.
INSTALLATION
(1) Position the jounce bumper on the frame rail.
(2) Install the screws that attach the jounce
bumper to the frame rail. Tighten the screws to 20
Nzm (15 ft-lbs) torque.
REAR BUMPER
When equipped with a spare tire carrier attached
to the tailgate, a rear bumperette is attached to the
frame (Figs. 13 and 14).
BUMPERETTE AND DRAW BAR REMOVAL
(1) Remove the bumperette and draw bar retaining
nuts, bolts and washers from the frame rear cross-
member (Figs. 14 and 15).
(2) Remove the bumperettes, spacers, brackets and
draw bar from the rear crossmember.INSTALLATION
(1) Position the spacers, brackets, draw bar and
bumperettes on the rear crossmember.
(2) Install the retaining nuts, bolts and washers in
the frame rear crossmember. Tighten the retaining
nuts and bolts securely.
BODY
REMOVAL
The body is attached to the vehicle frame with
bolts (Fig. 15). The body can be removed for repair,
service access, or replacement, if necessary.
Fig. 12 Rear Jounce Bumpers
Fig. 13 Rear Bumperette
Fig. 14 Rear Bumperette & Draw Bar
13 - 18 FRAME AND BUMPERSJ

WHEELS AND TIRES
CONTENTS
page page
SPECIFICATIONS....................... 11
TIRES................................. 1VEHICLE VIBRATION..................... 9
WHEELS............................... 6
TIRES
INDEX
page page
Cleaning of Tires.......................... 2
General Information........................ 1
Pressure Gauges......................... 2
Repairing Leaks.......................... 3
Replacement Tires........................ 2Rotation................................ 3
Tire Inflation Pressures..................... 2
Tire Noise or Vibration..................... 4
Tire Wear Patterns........................ 4
Tread Wear Indicators...................... 3
GENERAL INFORMATION
Tires are designed for each specific vehicle. They
provide the best overall performance for normal op-
eration. The ride and handling characteristics match
the vehicle's requirements. With proper care they
will give excellent reliability, traction, skid resis-
tance, and tread life. These tires have specific load
carrying capacities. When correctly inflated, they
will operate properly.
Tires used in cool climates, and with light loads
will have a longer life than tires used in hot climates
with heavy loads. Abrasive road surfaces will accel-
erate tire wear.
Driving habits have more effect on tire life than
any other factor. Careful drivers will obtain much
greater mileage than careless drivers.
Driving habits that shorten the life of any tire;
²Rapid acceleration and deceleration
²Severe application of brakes
²High-speed driving
²Taking turns at excessive speeds
²Striking curbs and other obstacles
It is very important to follow the tire rotation in-
terval
IDENTIFICATION
Tire type, size, aspect ratio and speed rating are
encoded in the letters and numbers imprinted on the
side wall of the tire. Refer to the chart to decipher
the tire identification code (Fig. 1).
Performance tires will have a speed rating letter
after the aspect ratio number. The speed rating isnot always printed on the tire sidewall. The letterS
indicates that the tire is speed rated up to 112 mph.
²Qup to 100 mph
²Tup to 118 mph
²Uup to 124 mph
²Hup to 130 mph
²Vup to 149 mph
²Zmore than 149 mph (consult the tire manufac-
turer for the specific speed rating)
An All Season type tire will have eitherM+S,M
&SorMÐS(indicating mud and snow traction) im-
printed on the side wall.
RADIAL-PLY TIRES
Radial-ply tires improve handling, tread life, ride
quality and decrease rolling resistance.
Radial-ply tires must always be used in sets of
four. Under no circumstances should they be used on
the front only. They may be mixed with temporary
spare tires when necessary, but reduced speeds are
recommended.
Radial-ply tires have the same load-carrying capac-
ity as other types of tires of the same size. They use
the same recommended inflation pressures.
SPARE TIRE (TEMPORARY)
The compact spare tire is designed for emergency
use only. The original tire should be repaired and re-
installed at the first opportunity. Refer to Owner's
Manual for complete details.
JWHEELS AND TIRES 22 - 1

The reinforcement bracket is held on the
frame rail with two blind rivets.
(2) Remove the bracket and tow hook from frame
rail.
INSTALLATION
(1) Position bracket and tow hook on the frame
rail.
(2) Install bolts that attach tow hook bracket to
frame rail and reinforcement bracket. Tighten bolts
to 75 Nzm (55 ft-lbs) torque.
TRAILER HITCHES
CLASS III HITCHÐXJ VEHICLES
A class III weight-distributing/equalizer type hitch
can be used to tow a trailer:
²having a maximum gross weight of 5,000 lbs/2250
kg, and
²having a maximum tongue weight of 750 lbs/332
kg).
The following vehicle basic equipment is required
for class III trailer towing:
²P205/75R15 or larger tires;
²full size spare tire;
²trailer sway control;
²trailer tow wire harness and connector;
²heavy duty turn signal flasher element;
²heavy duty axle (with synthetic lubricant);²heavy duty cooling system;
²heavy duty generator/battery;
²auxiliary automatic transmission fluid cooler; and
²I-6, 4.0L engine.
Wide-angle type door mirrors are recommended but
not required.
WIRE HARNESS CONNECTORS
CLASS I HITCH CONNECTOR
The trailer tow wire harness connector for class I
trailer hitches is a 5-terminal, in-line type connector.
Terminal 5 is the source for vehicle ground.
CLASS III HITCH CONNECTOR
The trailer tow wire harness connector for class III
trailer-tow hitches is a 7-terminal, circular type con-
nector.
The 12-volt circuit for the trailer is protected
from overloads. A auto-reset type circuit
breaker is located in the trailer tow wire har-
ness near the plug-in relays.
CAUTION: The trailer tow wire harness package
does not include a vehicle battery isolator unit. Be-
cause of this, the trailer battery can totally dis-
charge the vehicle battery if the engine is not
operated for an extended period of time.
Fig. 11 Trailer Tow Wire Harness Connectors
23 - 88 BODY COMPONENTSÐXJ VEHICLESJ

INTERIOR COMPONENTS
INDEX
page page
Assist HandleÐXJ Vehicles................ 118
B/C-Pillar and Liftgate Pillar Trim CoversÐ
XJ Vehicles.......................... 116
Bucket Seat Cushion and Cover............. 98
Bucket Seat Platform and Tracks........... 105
Bucket Seatback Cover and Frame.......... 100
Bucket Seatback Reconditioning............ 102
Carpets and Floor Mats................... 129
Dash Panel Insulation Panel................ 95
Front Bucket Seats....................... 97
Front Carpet/MatÐXJ Vehicles............. 129
Front Inner Scuff Plate/Cowl Side Trim PanelÐ
XJ Vehicles.......................... 114
Front Shoulder Belt/BuckleÐXJ Vehicles...... 119
Full Floor ConsoleÐXJ Vehicles............ 125
Headliner.............................. 121
I/P Ash Receiver Tray Lamp................ 92
I/P Tweeter Speaker/Courtesy Lamp Support
Bracket.............................. 95
Instrument Cluster Bezel................... 91
Instrument Cluster/Switch/Lighter/Radio/Hevac . . . 91
Instrument Panel......................... 93
Interior Trim Panels and Scuff PlatesÐXJ Vehicles. 112
Jack StorageÐXJ Vehicles................ 127
Mini-Floor ConsoleÐXJ Vehicles............ 124
Outer Scuff PlatesÐXJ Vehicles............ 118
Power Bucket Seat Components............ 106
Quarter and Wheelhouse Trim PanelsÐ
XJ Vehicles.......................... 115
Quarter Trim Panel ExtensionÐXJ Vehicles . . . 115
Rear Carpet/MatÐXJ Vehicles.............. 130
Rear Seat Cushion CoverÐXJ Vehicles...... 107
Rear Seat Cushion ReconditioningÐXJ Vehicles . 108
Rear Seat CushionÐXJ Vehicles............ 107
Rear Seatback CoverÐXJ Vehicles.......... 111
Rear Seatback Latch Striker and BumperÐ
XJ Vehicles.......................... 111
Rear Seatback ReconditioningÐXJ Vehicles . . . 111
Rear SeatbackÐXJ Vehicles............... 109
Rear Shoulder/Lap Belt/BuckleÐXJ Vehicles . . . 120
Spare Tire/Wheel Holddown and Floor BracketsÐ
XJ Vehicles.......................... 128
Sunvisors............................. 124
Windshield Side MouldingÐXJ Vehicles...... 114
INSTRUMENT CLUSTER BEZEL
REMOVAL
(1) Remove the bezel retaining screws (Fig. 1).
(2) Separate the bezel from the U-clips and remove
it from the upper section of the instrument panel.
(3) If necessary, remove or install rocker switch
cover plates (Fig. 2).
INSTALLATION
(1) Position the bezel on the upper instrument
panel and engage it with the U-clips.
(2) Install the bezel retaining screws. Tighten the
screws with 1 Nzm (11 in-lbs) torque.
INSTRUMENT CLUSTER/SWITCH/LIGHTER/RADIO/
HEVAC
REMOVAL
(1) Remove the screws and instrument cluster be-
zel from instrument panel (Fig. 3).
(2) As applicable, remove the instrument cluster or
other I/P component screws.
(3) Disconnect wire harness connector(s) from cluster
or other I/P component. Refer to Group 8ÐElectrical.
(4) Remove the cluster or other I/P component
from the upper section of instrument panel (Fig. 9).
Fig. 1 Instrument Cluster Bezel Removal/Installation
Fig. 2 Instrument Cluster Bezel Removal/Installation
JBODY COMPONENTSÐXJ VEHICLES 23 - 91

SPARE TIRE/WHEEL HOLDDOWN AND FLOOR
BRACKETSÐXJ VEHICLES
REMOVAL
(1) Remove the spare tire and wheel.
(2) Remove the floor bracket retaining screws.
(3) Remove the holddown bolt from the holddown
bracket.
(4) Remove the trim panel from the quarter panel.
If necessary, refer to the removal procedure.
(5) Remove the retaining screws and the holddown
bracket from the quarter panel.
INSTALLATION
(1) Position the holddown bracket on the quarter
panel and install the retaining screws. Tighten the
screws to 8 Nzm (71 in-lbs) torque.
(2) Install the quarter trim panel. If necessary, re-
fer to the installation procedure.
(3) Install the holddown bolt in the holddown
bracket.
The length of the holddown bolt is different
for P195 and P225 tires.
(4) Position the floor bracket on the trim panel and
install the retaining screws. Tighten the screws to 1
Nzm (11 in-lbs) torque.
(5) Install the spare tire and wheel.
Fig. 153 Interior Spare Tire/Wheel Holddown and Floor Brackets
Fig. 152 Jack Retainer BracketÐXJ VehiclesFig. 154 Spare Tire/Wheel Floor Bracket
23 - 128 BODY COMPONENTSÐXJ VEHICLESJ

CARPETS AND FLOOR MATS
SERVICE INFORMATION
The carpets/mats are retained around the perime-
ter of the floor panel by the interior trim mouldings
and trim panels. To remove a carpet/mat, all of the
retaining trim mouldings and panels must be re-
moved along with all the interfering components (as
applicable):
²the seat(s),
²the parking brake lever coverÐXJ vehicles,
²the floor console, and
²the transmission and transfer case (if equipped)
floor shift cover/boot.
If necessary, refer to the applicable removal proce-
dure(s) within this manual.
FRONT CARPET/MATÐXJ VEHICLES
REMOVAL
(1) Remove the door sill inner scuff plates.
(2) Remove the front and rear seats (as applicable).
(3) As necessary, remove the trim panels and
mouldings.
(4) Remove all other interfering components.
(5) Remove the carpet and mat from the floor
panel.
INSTALLATION
(1) Position the carpet and mat on the floor panel.
(2) Install all the components that were removed
to facilitate carpet/mat removal.
(3) Install the trim panels and mouldings.
(4) Install the door sill inner scuff plates.
(5) Install the front and rear seats (as applicable).
Fig. 156 Spare Tire/Wheel Holddown Bolt and
Bracket (RHD)
Fig. 155 Spare Tire/Wheel Holddown Bolt and
Bracket (LHD)Fig. 157 Parking Brake Lever Removal/Installation
Fig. 158 Front Carpet and MatÐXJ Vehicles
JBODY COMPONENTSÐXJ VEHICLES 23 - 129