2002-2003 Jeep Grand Cherokee Service & Repair Manual

GROUP TAB LOCATOR Introduction 0 Lubrication & Maintenance 2 Suspension 3 Driveline 5 Brakes 7 Cooling 8A Audio 8B Chime/Buzzer 8E Electronic Control Modules 8F Engine Systems 8G Heated Systems 8H Horn 8I Ignition Control 8J Instrument Cluster 8L Lamps 8M Message Systems 8N Power Systems 8O Restraints 8P Speed Control 8Q Vehicle Theft Security 8R Wipers/Washers 8W Wiring 9 Engine 11 Exhaust System 13 Frame & Bumpers 14 Fuel System 19 Steering 21 Transaxle 22 Tires/Wheels 23 Body 24 Heating & Air Conditioning 25 Emissions Control Service Manual Comment Forms (Rear of Manual)

INTRODUCTION TABLE OF CONTENTS page page BODY CODE PLATE DESCRIPTION .......................... 1 FASTENER IDENTIFICATION DESCRIPTION .......................... 1 FASTENER USAGE DESCRIPTION - FASTENER USAGE ......... 4 THREADED HOLE REPAIR DESCRIPTION - THREADED HOLE REPAIR .... 4 INTERNATIONAL SYMBOLS DESCRIPTION - INTERNATIONAL SYMBOLS ...4 METRIC SYSTEM DESCRIPTION .......................... 5 TORQUE REFERENCES DESCRIPTION .......................... 7 VEHICLE EMISSION CONTROL INFORMATION (VECI) DESCRIPTION .......................... 8 VEHICLE IDENTIFICATION NUMBER DESCRIPTION .......................... 8 VEHICLE SAFETY CERTIFICATION LABEL DESCRIPTION .......................... 9 BODY CODE PLATE DESCRIPTION A metal Body Code plate is located in the engine compartment and attached to the top of the right frame rail. The information listed on the plate (Fig. 1) is used for manufacturing and service purposes. FASTENER IDENTIFICATION DESCRIPTION The SAE bolt strength grades range from grade 2 to grade 8. The higher the grade number, the greater the bolt strength. Identification is determined by the line marks on the top of each bolt head. The actual bolt strength grade corresponds to the number of line marks plus 2. The most commonly used metric bolt strength classes are 9.8 and 10.9. The metric strength class identification number is imprinted on the head of the bolt. The higher the class number, the greater the bolt strength. Some metric nuts are imprinted with a single-digit strength class on the nut face. Refer to the Fastener Identification and Fastener Strength Charts (Fig. 2) and (Fig. 3). Fig. 1 Body Code Plate WJ INTRODUCTION 1

Fig. 2 FASTENER IDENTIFICATION 2 INTRODUCTION WJ FASTENER IDENTIFICATION (Continued)

Fig. 3 FASTENER STRENGTH WJ INTRODUCTION 3 FASTENER IDENTIFICATION (Continued)

FASTENER USAGE DESCRIPTION - FASTENER USAGE WARNING: USE OF AN INCORRECT FASTENER MAY RESULT IN COMPONENT DAMAGE OR PER- SONAL INJURY. Fasteners and torque specifications references in this Service Manual are identified in metric and SAE format. During any maintenance or repair procedures, it is important to salvage all fasteners (nuts, bolts, etc.) for reassembly. If the fastener is not salvageable, a fastener of equivalent specification must be used. THREADED HOLE REPAIR DESCRIPTION - THREADED HOLE REPAIR Most stripped threaded holes can be repaired using a Helicoilt. Follow the vehicle or Helicoilt recommen- dations for application and repair procedures. INTERNATIONAL SYMBOLS DESCRIPTION - INTERNATIONAL SYMBOLS The graphic symbols illustrated in the following International Control and Display Symbols Chart are used to identify various instrument controls. The symbols correspond to the controls and displays that are located on the instrument panel. INTERNATIONAL SYMBOLS 1 High Beam 13 Rear Window Washer 2 Fog Lamps 14 Fuel 3 Headlamp, Parking Lamps, Panel Lamps 15 Engine Coolant Temperature 4 Turn Warning 16 Battery Charging Condition 5 Hazard Warning 17 Engine Oil 6 Windshield Washer 18 Seat Belt 7 Windshield Wiper 19 Brake Failure 8 Windshield Wiper and Washer 20 Parking Brake 9 Windscreen Demisting and Defrosting 21 Front Hood 10 Ventilating Fan 22 Rear hood (Decklid) 11 Rear Window Defogger 23 Horn 12 Rear Window Wiper 24 Lighter 4 INTRODUCTION WJ

METRIC SYSTEM DESCRIPTION The metric system is based on quantities of one, ten, one hundred, one thousand and one million. The following chart will assist in converting metric units to equivalent English and SAE units, or vise versa. CONVERSION FORMULAS AND EQUIVALENT VALUES MULTIPLY BY TO GET MULTIPLY BY TO GET in-lbs x 0.11298 = Newton Meters (N·m) N·m x 8.851 = in-lbs ft-lbs x 1.3558 = Newton Meters (N·m) N·m x 0.7376 = ft-lbs Inches Hg (60° F) x 3.377 = Kilopascals (kPa) kPa x 0.2961 = Inches Hg psi x 6.895 = Kilopascals (kPa) kPa x 0.145 = psi Inches x 25.4 = Millimeters (mm) mm x 0.03937 = Inches Feet x 0.3048 = Meters (M) M x 3.281 = Feet Yards x 0.9144 = Meters M x 1.0936 = Yards mph x 1.6093 = Kilometers/Hr. (Km/h) Km/h x 0.6214 = mph Feet/Sec x 0.3048 = Meters/Sec (M/S) M/S x 3.281 = Feet/Sec mph x 0.4470 = Meters/Sec (M/S) M/S x 2.237 = mph Kilometers/Hr. (Km/h) x 0.27778 = Meters/Sec (M/S) M/S x 3.600 Kilometers/Hr. (Km/h) COMMON METRIC EQUIVALENTS 1 inch = 25 Millimeters 1 Cubic Inch = 16 Cubic Centimeters 1 Foot = 0.3 Meter 1 Cubic Foot = 0.03 Cubic Meter 1 Yard = 0.9 Meter 1 Cubic Yard = 0.8 Cubic Meter 1 Mile = 1.6 Kilometers Refer to the Metric Conversion Chart to convert torque values listed in metric Newton- meters (N·m). Also, use the chart to convert between millimeters (mm) and inches (in.) (Fig. 4). WJ INTRODUCTION 5

Fig. 4 METRIC CONVERSION CHART 6 INTRODUCTION WJ METRIC SYSTEM (Continued)

TORQUE REFERENCES DESCRIPTION Individual Torque Charts appear within many or the Groups. Refer to the Standard Torque Specifica- tions Chart for torque references not listed in the individual torque charts (Fig. 5). Fig. 5 TORQUE SPECIFICATIONS WJ INTRODUCTION 7

VEHICLE EMISSION CONTROL INFORMATION (VECI) DESCRIPTION All vehicles are equipped with a combined vehicle emission control information (VECI) label(s). The label is located in the engine compartment on the vehicle hood (Fig. 6). Two labels are used for vehicles built for sale in the country of Canada. The VECI label(s) contain the following: • Engine family and displacement • Evaporative family • Emission control system schematic • Certification application • Spark plug and gap The label also contains an engine vacuum schematic. There are unique labels for vehicles built for sale in the state of California and the country of Canada. Canadian labels are written in both the English and French languages. These labels are per- manently attached and cannot be removed without defacing information and destroying label. VEHICLE IDENTIFICATION NUMBER DESCRIPTION The Vehicle Identification Number (VIN) plate is attached to the top left side of the instrument panel. The VIN contains 17 characters that provide data concerning the vehicle. Refer to the decoding chart to determine the identification of a vehicle. VEHICLE IDENTIFICATION NUMBER DECODING CHART POSITION INTERPRETATION CODE = DESCRIPTION 1 Country of Origin 1 = United States 2 Make J = Jeep 3 Vehicle Type 4 = MPV 4 Gross Vehicle Weight Rating G = 5001-6000 lbs. 5 Vehicle Line X = Grand Cherokee 4X2 (LHD) W = Grand Cherokee 4X4 (LHD) 6 Series 3 = Sport 4 = Laredo 5 = Limited 6 = Overland 7 Body Style 8 = 4dr Sport Utility 8 Engine S = 4.0 Liter Gasoline N = 4.7 Liter Gasoline 9 Check Digit 0 through 9 or X 10 Model Year 2=2002 11 Assembly Plant C = Jefferson Assembly 12 thru 17 Vehicle Build Sequence Fig. 6 VECI Label Location 1 - VECI LABEL (CANADIAN) 2 - VECI LABEL 3 - HOOD 8 INTRODUCTION WJ

VEHICLE SAFETY CERTIFICATION LABEL DESCRIPTION A vehicle safety certification label (Fig. 7) is attached to every DaimlerChrysler Corporation vehicle. The label certifies that the vehicle conforms to all applicable Federal Motor Vehicle Safety Standards. The label also lists: • Month and year of vehicle manufacture. • Gross Vehicle Weight Rating (GVWR). The gross front and rear axle weight ratings (GAWR’s) are based on a minimum rim size and maximum cold tire inflation pressure. • Vehicle Identification Number (VIN). • Type of vehicle. • Type of rear wheels. • Bar code. • Month, Day and Hour (MDH) of final assembly. • Paint and Trim codes. • Country of origin. The label is located on the driver-side door shut-face. Fig. 7 VEHICLE SAFETY CERTIFICATION LABEL - TYPICAL WJ INTRODUCTION 9

2002-2003 Jeep Grand Cherokee Service & Repair Manual

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