1988 JEEP CHEROKEE Service Repair Manual

IMPORTANT: A quantity of parts will be distributed initially and
billed to all involved dealers. This quantity will cover a
portion of the total vehicles involved. Additional parts
will ba supplied as indicated in the Special Parts Supply
Message with this notification letter.
Each involved dealer, to whom vehicles in the recall were invoiced
(or the current dealer at the same street address), will receive
enough Oxygen Sensor Packages, Recall P/N C3905610, to service 25% of
those vehicles (minimum of 5 and maximum of 20 packages).
Each uninvolved dealer will receive 5 parts packages to service
vehicles upon request.
Each parts package contains the following components:
PARTS INFORMATION
PARTS INFORMATION TABLE







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Description  Qty. 










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Oxygen Sensor  1 










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Instruction Sheet  1 











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OWNER NOTIFICATION & SERVICE SCHEDULING
All involved vehicle owners known to Chrysler are being notified of
the service requirement by first class mail. They are requested to
schedule appointments for the service with their dealers at the
earliest possible date. A copy of the
CUSTOMER NOTIFICATION LETTER is
in this bulletin.
Enclosed with each owner notification is an Owner Notification Form.
The involved vehicle and recall are identified on the form for owner
or dealer reference as needed.
SERVICE PROCEDURE
A. OXYGEN SENSOR INSPECTION
1. Raise Vehicle on a hoist and locate oxygen sensor in exhaust
manifold as shown in Fig. 1.
a. If the oxygen sensor has a metal stone shield around the sensor
body continue with Step B.
b. If the sensor does not have a stone shield, a new sensor has
already been installed and no further service is required.
WARNING: Exhaust manifold becomes very hot during engine operation.
Allow engine to cool before removing oxygen sensor.
1. Disconnect the oxygen sensor electrical connector.
2. Remove oxygen sensor using a crowfoot socket.
3. Clean exhaust manifold threads.

4. Install provided oxygen sensor (P/N C3905610). Tighten to
30 N.m (22 ft-lb).
5. Connect oxygen sensor connector.
6. Lower vehicle.
Fig. 1: Wire Connector & Oxygen Sensor - Location
CUSTOMER NOTIFICATION LETTER









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EMISSIONS RECALL - OXYGEN SENSOR REPLACEMENT
Dear Chrysler Vehicle Owner:
Chrysler Corporation and the Environmental Protection Agency has
determined that the oxygen sensor on certain Cherokee, Wagoneer and
Comanche models may be susceptible to failure. Failure of the oxygen
sensor may cause your vehicle to be in violation of Federal Emissions
Standards. For this reason, we are asking you to return your vehicle,
identified by the Vehicle Identification Number on the enclosed form,
to your dealer for a special service repair. This service will be
provided free of charge.
The needed instructions have been sent to all involved dealers. The
service will not hurt your engine performance or fuel economy. To
obtain this service:
* Contact your Jeep/Eagle dealer as soon as possible to make an
appointment for the free service.
* Take the enclosed Owner Notification Form with you at the time of
your appointment and give it to your dealer. The form identifies
the vehicle and recall for which service is required.
* The dealer will inspect and replace the oxygen sensor if
necessary. The service will take about one-half hour, but
additional time may be required depending on how service
appointments are scheduled and processed.
In order to ensure your full protection under the emission warranty
made applicable to your vehicle under Federal law, and your right to
participate in future recalls, it is recommended that you have your
vehicle serviced as soon as possible. Failure to do so could legally
be determined to be a lack of proper maintenance of your vehicle.
Further, without this repair your vehicle may fail a state or local
emission inspection test.
If you have any problem obtaining the service, please contact the
Chrysler Zone Service Office in your area. (It is listed under
"Service Assistance" in your Owner's Manual.} A Zone representative
will arrange for prompt servicing of your vehicle. If you are still
unable to obtain the repair as described in this letter within a
reasonable time, you may also contact the Manufacturers Operations
Division of the Environmental Protection Agency (6405d), 401 M Street
S. W., Washington, D. C. 20460.
We regret any inconvenience this action may cause, but trust you
understand our interest in clean air and in your continuing
satisfaction with our product. Thank you for your prompt attention to
this important matter.
Customer Services Field Operations
Chrysler Corporation









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COMPLETION REPORTING & REIMBURSEMENT
Claims for vehicles which have been serviced must be submitted on
the DIAL System. Claims submitted will be used by Chrysler to record
recall service completions and provide dealer payments.

Use ONE of the following labor operation numbers and time
allowances:
Labor Operation No.: 25561181 - Inspect Oxygen Sensor
Time Allowance: 0.2 hr.
Labor Operation No.: 25561182 - Replace Oxygen Sensor
Time Allowance: 0.3 hr.
Add the cost of the recall parts package plus applicable dealer
allowance to your claim.
Parts Return
Initially, a small number of oxygen sensors are required to be
returned to the Warranty Material Return Center. When an adequate
number of returned parts have been accumulated, Parts Return Documents
will no longer be generated and parts are to be discarded.
NOTE: See Warranty Policy and Procedure Manual, Chapter 6,
Subsection H for complete recall claim processing and
material return instructions.
Vehicle Not Available
If a vehicle is not available for service for a known reason, let us
know by filling out the pre-addressed Vehicle Disposition Form portion
of the Owner Notification Form or describe the reason on a postcard
and mail to:
Chrysler Corporation 429-10-04
P.O. Box 1919
Detroit, Michigan 48231-1919
Following the above procedures will expedite the processing of your
claim.
If you have any questions or need assistance in completing this
action, please contact your Zone Service Office.

RID IN G H EIG HT A D JU STM EN T

1988 J e ep C hero ke e
1988 RIDING HEIGHT SPECIFICATIONS
Chrysler Motors & Jeep
All Models
RIDING HEIGHT SPECS
There are no RIDE HEIGHT specifications available for all
Chrysler and Jeep models.

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SC HED ULE D S ER VIC ES - G ASO LIN E

1988 J e ep C hero ke e
1984-88 MAINTENANCE
AMC/Jeep Maintenance & Service Intervals - Gasoline
Jeep; Cherokee, Wagoneer
* PLEASE READ THIS FIRST *
NOTE: All SERVICE SCHEDULES are listed for normal service
vehicles. If vehicle is operated under severe service
conditions, see SEVERE SERVICE REQUIREMENTS (PERFORM
W/SERVICE SCHEDULES) for items requiring additional
maintenance.
NOTE: This article contains scheduled maintenance service
information. Fluid types and capacities listed with each
service in this article are only those necessary to perform
that scheduled service. For specifications pertaining to
fluid capacities for the entire vehicle, fuse and circuit
breaker identification, wheel and tire size, battery type,
warranty information, or model identification refer to the
MAINTENANCE INFORMATION article in this section.
CAUTIONS & WARNINGS
AIR CONDITIONING MAINTENANCE
WARNING: NEVER add A/C refrigerant to correct a non-cooling problem
unless pressure gauges are connected to the system by a
certified technician. Lack of cooling may be caused by a
restriction, therefore adding refrigerant can cause a
dangerous pressure rise.
ANTI-LOCK BRAKE SYSTEM (If Equipped)
The anti-lock brake system contains electronic equipment that
can be susceptible to interference caused by improperly installed or
high output radio transmitting equipment. Since this interference
could cause the possible loss of the anti-lock braking capability,
such equipment should be installed by qualified professionals.
On models equipped with anti-lock brake systems, ALWAYS
observe the following cautions:
* DO NOT attempt to bleed hydraulic system without first
referring to the appropriate ANTI-LOCK BRAKE SYSTEM article
in the BRAKES Section.
* DO NOT mix tire sizes. As long as tires remain close to the
original diameter, increasing the width is acceptable.
Rolling diameter must be identical for all 4 tires. Some
manufacturers recommend tires of the same brand, style and
type. Failure to follow this precaution may cause inaccurate
wheel speed readings.
* Use ONLY recommended brake fluids. DO NOT use silicone brake
fluids in an ABS-equipped vehicle.
BATTERY WARNING
WARNING: When battery is disconnected, vehicles equipped with

computers may lose memory data. When battery power is
restored, driveability problems may exist on some vehicles.
These vehicles may require a relearn procedure. See COMPUTER
RELEARN PROCEDURES article in GENERAL INFORMATION section.
REPLACING BLOWN FUSES
Before replacing a blown fuse, remove ignition key, turn off
all lights and accessories to avoid damaging the electrical system. Be
sure to use fuse with the correct indicated amperage rating. The use
of an incorrect amperage rating fuse may result in a dangerous
electrical system overload.
BRAKE PAD WEAR INDICATOR
Indicator will cause a squealing or scraping noise, warning
that brake pads need replacement.
BRAKE WARNING LIGHT
CAUTION: If BRAKE warning light is on with parking brake disengaged
and engine running, there may be a problem in the hydraulic
brake system. Braking effort, brake pedal travel and
stopping distances may increase.
CATALYTIC CONVERTER
To prevent catalytic converter overheating, DO NOT allow
engine to idle for more than 20 minutes.
COMMAND-TRAC (4WD)
CAUTION: NEVER operate a Command-Trac vehicle in 4WD on dry,
hard-surfaced roads for a sustained period. Use 4L only
when needed for added pulling power. Operating vehicle in
4WD mode on such roads will cause stress and possible
damage to components, as well as make shifting difficult.
To reduce shifting effort, drive vehicle in Reverse for a
few feet, or drive off hard-surfaced road momentarily to
allow tire slippage.
FRONT AND REAR DIFFERENTIALS (4WD)
CAUTION: DO NOT use water, steam, kerosene or gasoline for flushing
a differential. ONLY use a flushing oil.
TRAC-LOK DIFFERENTIALS (4WD)
CAUTION: DO NOT flush a rear axle Trac-Lok differential. Trac-Lok
differentials may be cleaned only by disassembling the
unit and wiping the components with clean, lint-free cloth.
CAUTION: NEVER attempt to engage Low range when vehicle is moving
faster than 2-3 MPH, as transfer case damage may result.
GASOLINE CONTAINING ALCOHOL
CAUTION: Exclusive use of gasohol is not recommended. Vehicle test
results have shown that significant fuel system corrosion
can result when gasohol is used exclusively.

HALOGEN BULBS
Halogen bulbs contain pressurized gas which may explode if
overheated. DO NOT touch glass portion of bulb with bare hands. Eye
protection should be worn when handling or working around halogen
bulbs.
OIL FILTER
CAUTION: The engine oil filter mount has metric threads. Use of a
filter with improper threads can result in oil leakage and
possible engine damage. Look for M20 x 1.5 symbol on the
filter.
RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the
radiator fan. The fan is temperature controlled and could
start at any time even when the ignition key is in the OFF
position. DO NOT loosen or remove radiator cap when cooling
system is hot.
RADIATOR FAN
Keep hands away from radiator fan. Fan is controlled by a
thermostatic switch which may come on or run for up to 15 minutes even
after engine is turned off.
WHEEL & TIRE WARNINGS
CAUTION: Replacing original tires with different size tires may
result in false speedometer and odometer indications. Check
with dealer before using different size tires on vehicle.
CAUTION: Ensure all 4 wheels on vehicle have same tire size, type
and circumference in order to provide proper vehicle
handling. DO NOT mix radial-ply with bias-ply or
bias-belted tires. On 4WD vehicles, if tire size, type and
circumference on all 4 wheels are not the same, gear
shifting will be adversely affected and can damage transfer
case.
CAUTION: Temporary-use spare tires are for emergency use only. DO
NOT drive vehicle faster than 50 MPH or more than 100 miles
when using spare tire. DO NOT operate vehicle in 4WD mode
when using spare tire, as damage to transfer case can
result. Temporary-use spare tires have a total tread life
of 3,000 miles.
SERVICE POINT LOCATIONS