Jeep Grand Cherokee WG 2002 Workshop Service Repair Manual

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🏷️ Basic Information Identification Make: Jeep Model: Grand Cherokee Generation Code: WJ Model Year: 2002 Platform: WJ 👋 Introduction Market Position Segment: Mid-size Luxury SUV Target Audience: Enthusiasts, DIY mechanics,...

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Sku: 364127

Tags: 2002 Car Cars Grand Cherokee WG Jeep Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

Grand Cherokee

Generation Code:

Model Year:

Platform:

👋 Introduction

Market Position

Segment:

Mid-size Luxury SUV

Target Audience:

Enthusiasts, DIY mechanics, Professional repair shops

Competitive Analysis

Competitors:

Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery

Key Features

Nvh Reduction:

Significant improvements in Noise, Vibration, and Harshness (NVH) over previous generation

Interior Space:

Larger interior cabin and cargo volume compared to ZJ Grand Cherokee

Off Road Capability:

Maintained Jeep's signature off-road prowess with available 4WD systems

📋 Manual Details

Coverage Areas

Coverage:

Complete Factory Service and Repair

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

Format:

Downloadable Digital File (PDF)

📖 Manual Coverage

Systems Covered

Engine:

4.0L I6 PowerTech, 4.7L V8 Magnum

Transmission:

42RE Automatic, 45RFE/545RFE Automatic, NV242/NV247 Transfer Cases

Drivetrain:

Front and Rear Axles, Driveshafts, Differentials, NV242/NV247 Transfer Case

Suspension:

Front and Rear Suspension Systems (Solid Axle Rear, Independent Front in later WJ years, though 2002 likely has solid front), Control Arms, Springs, Shocks, Sway Bars

Brakes:

Front and Rear Disc Brakes, ABS System, Parking Brake

Steering:

Power Steering System, Steering Column, Steering Gear

Electrical:

12V Battery System, Charging System (Alternator), Starting System (Starter), Ignition System, Lighting, Fuses, Relays, Wiring Diagrams

Body:

Exterior Body Panels, Doors, Hood, Tailgate, Bumpers, Glass, Seals, Interior Trim

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) System, Climate Control

Comfort Convenience:

Power Windows, Power Locks, Power Mirrors, Seats, Sunroof (if equipped), Remote Keyless Entry

Safety Security:

Airbags, Seat Belts, Anti-theft System

Procedures Included

Maintenance:

Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements

Troubleshooting:

Diagnostic Trouble Codes (DTCs), Symptom-Based Troubleshooting Guides, Electrical Schematics for Fault Finding

Repair:

Component Removal and Installation, Engine Rebuilds, Transmission Overhauls, Brake System Repairs, Suspension Component Replacement

Diagnostics:

Engine Control Module (ECM) Diagnostics, Powertrain Control Module (PCM) Diagnostics, ABS Diagnostics, HVAC Diagnostics

Specifications:

Torque Specifications for all fasteners, Electrical Component Specifications, Diagnostic Specifications

Technical Depth

Depth:

Comprehensive (from basic maintenance to full engine/transmission rebuilds and complex electrical diagnostics)

Diagnostic Tools:

References to use of DRB III scanner or equivalent OBD-II tools for advanced diagnostics

Schematics:

Detailed wiring diagrams for all electrical systems

📊 Manual Specifications

File Format

Format:

Print Quality

Quality:

High Resolution, Printable

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper:

N/A (Digital Download)

Searchability

Text Search:

Searchable Text Content

Usability

Navigation:

Hyperlinked Sections for easy navigation

⚙️ Engine Specifications

Primary Engine

Engine 1:

4.0L I6 PowerTech (242 cid)

Engine 1 Horsepower:

190 hp @ 4450 rpm

Engine 1 Torque:

235 lb-ft @ 3200 rpm

Secondary Engine

Engine 2:

4.7L V8 Magnum (287 cid)

Engine 2 Horsepower:

235 hp @ 4700 rpm

Engine 2 Torque:

305 lb-ft @ 3200 rpm

Fuel System

Fuel Injection:

Sequential Multi-Port Fuel Injection (MPI)

Emission Control

Emission System:

Catalytic Converter, On-Board Diagnostics (OBD-II)

Cooling System

Coolant Capacity:

11.2 liters (11.8 US qt) with 4.0L; 11.8 liters (12.5 US qt) with 4.7L

🔧 Transmission

Standard Transmission

Transmission Type Std:

4-speed automatic (42RE for 4.0L, 45RFE for 4.7L)

Optional Transmission

Transmission Type Opt:

5-speed automatic (545RFE for 4.7L - often in later production models or specific trims)

Transfer Case

Transfer Case Options:

Selec-Trac NV242 (2WD/4WD Part-Time), Quadra-Trac II NV247 (Full-Time 4WD with electronic transfer case)

Transmission Fluid

Fluid Spec Automatic:

ATF+3 (Chrysler specification) or equivalent (e.g., Mopar ATF+4, Dexron III/Mercon)

Fluid Capacity 42Re:

1.6 liters (1.7 US qt) pan drain

Fluid Capacity 45Rfe 545Rfe:

1.7 liters (1.8 US qt) pan drain

📐 Dimensions

Exterior

Length:

4724 mm (186.0 in)

Width:

1836 mm (72.3 in)

Height:

1730 mm (68.1 in)

Wheelbase:

2888 mm (113.7 in)

Weights

Curb Weight 4.0L:

4,250 lbs (1,928 kg)

Curb Weight 4.7L:

4,476 lbs (2,030 kg)

Towing Capacity:

Up to 5,000 lbs (2,268 kg) with optional tow package

Cargo

Cargo Volume Behind 2Nd Row:

37.5 cu ft (1,062 liters)

Cargo Volume Max:

74.5 cu ft (2,110 liters)

🛡️ Safety Features

Ratings

NHTSA Frontal Driver 2002:

Four Stars

NHTSA Frontal Passenger 2002:

Four Stars

NHTSA Side Driver 2002:

Not Rated (or Five Stars depending on testing criteria)

IIHS Front Small Overlap 2002:

Acceptable (but tests were less rigorous then)

Active Features

Standard 4-wheel Anti-lock Braking System (ABS)

Traction Control:

Available (often linked to specific 4WD systems or trim levels)

Passive Features

Airbags:

Standard front airbags, optional side airbags

Seatbelts:

Front pretensioner seatbelts, rear 3-point seatbelts

💡 Technology Features

Infotainment

Audio System:

Optional Infinity Gold premium audio system with CD player and amplifier.

Navigation:

Optional factory navigation system available on higher trim levels.

Driver Assistance

Cruise Control:

Standard electronic cruise control.

Connectivity

Remote Keyless Entry:

Optional remote keyless entry system.

Comfort Features

Climate Control:

Available automatic climate control (Dual-zone) on Limited and Overland trims.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 5,000 to 7,500 miles (8,000 to 12,000 km) or 6 months, depending on driving conditions

Transmission Fluid Interval:

Check every 30,000 miles (48,000 km), Replace every 60,000 to 100,000 miles (96,000 to 160,000 km) or as per manual recommendation

Engine Coolant Interval:

First change at 100,000 miles (160,000 km), then every 50,000 miles (80,000 km)

Fluid Specifications

Engine Oil Spec:

SAE 5W-30 API Certified (or 10W-30 for hotter climates, consult owner's manual for specific recommendations)

Engine Oil Capacity 4.0L:

5.0 quarts (4.7 liters) with filter

Engine Oil Capacity 4.7L:

6.0 quarts (5.7 liters) with filter

Coolant Spec:

Chrysler HOAT (Hybrid Organic Acid Technology) coolant, typically pink or orange

Brake Fluid Spec:

DOT 3

Known Issues

Common Issue 1:

Cracked cylinder heads on the 4.7L V8 Magnum engine (especially earlier versions, but can affect 2002 models).

Common Issue 2:

Water pump leaks, especially around the housing and seal.

Common Issue 3:

Blend door actuator failures in the HVAC system, leading to temperature control issues.

Common Issue 4:

Power steering pump leaks and groaning noise.

Common Issue 5:

PCM (Powertrain Control Module) failures or communication issues.

Common Issue 6:

Transfer case actuator or sensor failures (on Quadra-Trac II models).

📚 Vehicle History

Brand Heritage

Jeep Heritage:

Jeep has a long history of rugged, capable off-road vehicles, originating from military applications.

Model Evolution

Grand Cherokee Launch:

First generation (ZJ) introduced in 1993 as a more luxurious alternative to the Cherokee.

Wj Generation Intro:

The WJ generation was introduced for the 1999 model year, representing a significant redesign.

Wj Facelift:

A minor facelift and powertrain updates occurred for the 2001 model year.

Production

Production Location:

Detroit, Michigan, USA (Jefferson North Assembly Plant)

Production Years

Wj Production Span:

1999-2004

🏆 Awards & Recognition

Recognitions

Award Example 1:

Frequently praised for its comfortable ride and capable off-road performance for its class.

Award Example 2:

Rated highly by owners for its durability and long-term reliability, especially the 4.0L engine.

Award Example 3:

Considered a benchmark for luxury and refinement in the SUV segment during its debut.