📚 Vehicle Manual Information

Jeep Grand Cherokee WJ 2002 All Service Repair Manual

🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2002

Generation:

WJ

Chassis Code:

WJ

👋 Introduction

Positioning:

The Jeep Grand Cherokee WJ (1999-2004) represented a significant evolution for Jeep's mid-size SUV, focusing on improved on-road manners while retaining robust off-road capabilities. This 2002 model falls within the refined second generation of the WJ platform.

Competitors:

Competed against vehicles like the Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, and Land Rover Discovery.

Features:

Renowned for its strong inline-six and V8 engine options, comfortable ride quality for its class, and advanced four-wheel-drive systems (Selec-Trac, Quadra-Trac II, Quadra-Drive).

Value:

An indispensable resource for owners and DIY enthusiasts seeking to maintain, repair, and troubleshoot their 2002 Jeep Grand Cherokee WJ with factory-level accuracy and detail.

📋 Manual Details

Engine Coverage:

4.0L I6, 4.7L V8

Transmission Coverage:

42RE (4-speed Automatic), NV3500 (5-speed Manual)

Drivetrain Coverage:

4x2 RWD, 4x4 Selec-Trac, 4x4 Quadra-Trac II, 4x4 Quadra-Drive

Systems Covered:

Engine Mechanical, Engine Control System (MPI), Fuel System, Exhaust System, Cooling System, Lubrication System, Ignition System, Starting System, Charging System, Transmission (Automatic & Manual), Transfer Case, Drivelines, Axles, Suspension (Front & Rear), Steering System, Brakes (Hydraulic, ABS), Climate Control System (HVAC), Body Electrical System, Lighting System, Instrument Cluster, SRS (Airbag) System, Body Panels, Doors, Windows, Seats, Interior Trim

Trim Level Coverage:

Covers all available trim levels for the 2002 Grand Cherokee WJ (e.g., Laredo, Limited, Overland, Sport).

Estimated Pages:

1800+

Type:

Factory Service Manual (FSM) / Workshop Manual

Language:

English

Format:

Downloadable PDF

📖 Manual Coverage

All Systems:

Comprehensive coverage of all major mechanical, electrical, and body systems.

Chassis Suspension Steering:

Detailed information on front and rear suspension components, steering gear, power steering pump, and alignment specifications.

Brakes And ABS:

Full coverage of hydraulic brake systems, including master cylinder, brake lines, calipers, pads, rotors, and ABS system components and diagnostics.

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, tune-ups.

Repair:

Engine overhaul, transmission rebuild, brake service, suspension replacement, electrical component repair, bodywork.

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics, wiring diagrams.

Installation:

Component replacement procedures, accessory installation guidelines.

Body Repair:

Procedures for body panel removal/installation, door mechanisms, glass replacement, and interior trim.

Troubleshooting Guides:

Extensive troubleshooting flowcharts and symptom-based diagnostic guides for common and uncommon issues.

Depth:

In-depth, from basic adjustments to complete engine and transmission rebuilds, including detailed torque specifications, clearances, and diagnostic procedures.

Wiring Diagrams:

Includes detailed electrical schematics and wiring diagrams for all major systems.

Torque Specs:

Comprehensive torque specifications for all fasteners across all major components.

Special Tools:

Identification and usage instructions for specialized tools required for certain repair procedures.

📊 Manual Specifications

Digital Format:

Searchable PDF with printable pages.

Quality:

High-resolution scanned pages for clarity of text and diagrams.

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Engine 1:

4.0L (242 cu in) Power Tech I6

Engine 2:

4.7L (285 cu in) Power Tech V8 (High Output option available)

Hp 4.0L:

195 hp @ 4600 rpm

Torque 4.0L:

230 lb-ft @ 3200 rpm

Hp 4.7L:

235 hp @ 4500 rpm

Torque 4.7L:

295 lb-ft @ 3200 rpm

Fuel Delivery:

Multi-Point Fuel Injection (MPI)

Fuel:

Unleaded Gasoline

ECU:

Standard powertrain control module (PCM) with diagnostic capabilities.

🔧 Transmission

Transmission Std:

42RE 4-Speed Automatic

Transmission Opt Manual:

NV3500 5-Speed Manual (less common)

Overdrive:

All automatic transmissions feature overdrive (4th gear).

Atf Spec:

Chrysler ATF+4 (Mopar)

Transfer Case:

Selec-Trac (NV242), Quadra-Trac II (NV247), Quadra-Drive (NV247 with ELSD)

📐 Dimensions

Length:

181.7 inches (4615 mm)

Width:

73.3 inches (1862 mm)

Height:

66.0 inches (1676 mm)

Wheelbase:

116.0 inches (2946 mm)

Cargo Volume Rear Seat Up:

37.5 cu ft

Cargo Volume Rear Seat Down:

78.2 cu ft

Curb Weight:

Approx. 4200-4500 lbs (depending on engine and drivetrain)

Towing Capacity:

Up to 5000 lbs (with proper towing package)

🛡️ Safety Features

NHTSA Frontal Driver:

4/5 Stars (1999-2001 models, comparable for 2002)

NHTSA Frontal Passenger:

4/5 Stars (1999-2001 models, comparable for 2002)

IIHS Side Impact:

Acceptable (for models tested)

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Available Traction Control System (TCS) on some models.

Airbags:

Driver and front passenger airbags, optional side curtain airbags.

Seatbelts:

3-point front and rear seat belts, pretensioners for front seats.

💡 Technology Features

Audio System:

Optional Infinity Gold premium audio system with CD player, cassette player, and steering wheel audio controls.

Navigation:

Optional factory-installed navigation system available on select trims.

Cruise Control:

Standard cruise control.

Parking Sensors:

Optional rear parking assist sensors.

Oem Connectivity:

Limited OEM connectivity features by modern standards; primarily AM/FM radio, CD/cassette player.

Power Features:

Available power seats, power windows, power mirrors, remote keyless entry.

🔧 Maintenance

Oil Change Interval:

Every 5,000 - 7,500 miles (3,000 miles for severe driving conditions) using synthetic blend or full synthetic oil.

Tire Rotation:

Every 5,000 - 7,500 miles.

Transmission Fluid Change:

Every 30,000 - 60,000 miles, depending on usage and fluid condition. Refer to manual for specific intervals.

Coolant Flush:

Every 30,000 - 100,000 miles, depending on coolant type (e.g., HOAT).

Engine Oil Spec 4.0L:

SAE 10W-30 (preferred by Jeep for this engine), API certified.

Engine Oil Spec 4.7L:

SAE 5W-30, API certified.

Coolant Spec:

Mopar OAT (50/50 mix with distilled water) or equivalent HOAT coolant.

Brake Fluid Spec:

DOT 3 or DOT 4.

Power Steering Fluid:

ATF+4 or specific Mopar power steering fluid.

Common Problems:

Water pump leaks (especially on 4.7L), cracked cylinder heads (on early 4.7L), radiator failure, transmission cooler line leaks, transfer case chain stretch, rear main seal leaks, P0442 EVAP system leaks, various electrical gremlins, death wobble (suspension/steering component wear).

Part Numbers:

Manual provides detailed part numbers for genuine and aftermarket components.

📚 Vehicle History

Jeep Legacy:

Jeep, a division of Chrysler (now Stellantis), has a long and storied history in off-road vehicles, dating back to its military origins in World War II. The Grand Cherokee line was introduced in 1993 to offer a more luxurious and comfortable SUV experience compared to the Wrangler.

Wj Generation Overview:

The WJ generation (1999-2004) was a significant redesign from its ZJ predecessor. It featured a unibody construction with integrated body-frame (IBF) design, wider track, improved aerodynamics, and a more refined interior. The 2002 model year saw minor updates, including revised exterior trim and interior features.

Manufacturing Location:

Jeep vehicles were primarily manufactured in North America, with significant assembly occurring in Detroit, Michigan, and Brampton, Ontario, Canada.

Sales Trends:

The Grand Cherokee was a strong seller for Jeep throughout the early 2000s, capitalizing on the booming SUV market.

🏆 Awards & Recognition

Model Recognition:

The Grand Cherokee WJ was generally well-regarded for its blend of luxury, capability, and comfort, often receiving positive reviews from automotive journalists upon its release.

Consumer Reports:

Consumer Reports ratings for the WJ generation varied, with strengths in ride and handling but some concerns regarding reliability, particularly with the 4.7L engine and certain electrical components.

Certification Standards:

All factory specifications and procedures adhere to SAE (Society of Automotive Engineers) and manufacturer standards.