🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Model Code:

WG

Year:

2002

Generation Name:

Third Generation (WJ)

Generation Years:

1999-2004

Platform Code:

WJ

👋 Introduction

Segment:

Mid-size/Full-size Sport Utility Vehicle (SUV)

Target Audience:

Owners seeking to perform their own maintenance and repairs, DIY enthusiasts, professional mechanics

Key Competitors:

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

Vehicle Strengths:

Robust construction, capable four-wheel-drive systems (Quadra-Drive II), comfortable ride, spacious interior, towing capability

Manual Value Proposition:

Provides the in-depth technical knowledge required to maintain and repair the Jeep Grand Cherokee WG, enabling significant cost savings and ensuring long-term vehicle reliability.

📋 Manual Details

Regions Covered:

Global (North America, Europe, Asia, etc.)

Trim Levels Covered:

Laredo, Limited, Overland, Special Editions

Estimated Page Count:

1500+

Type:

Full Service & Repair Manual

Scope:

Comprehensive Repair, Maintenance, Diagnostics, Rebuilding

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Powertrain:

Engine overhaul, cooling system, fuel system, exhaust system, engine management, transmission (automatic & manual), transfer case, driveline (CV joints, driveshafts)

Chassis:

Suspension (front & rear), steering system, braking system (ABS, parking brake), wheels and tires

Electrical:

Wiring diagrams, lighting, battery, charging system, ignition system, starter, instrument cluster, power windows, locks, mirrors, seats, HVAC controls, radio, body control module (BCM)

Body:

Body panels, doors, windows, bumpers, exterior trim, interior trim, seats, airbags, climate control system (HVAC), safety restraints

Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement, brake pad and rotor replacement, tire rotation

Diagnostics:

Troubleshooting common symptoms, diagnostic trouble codes (DTCs) interpretation, electrical system diagnostics, engine performance diagnostics, emissions system diagnostics

Repair:

Engine component replacement, transmission overhaul, brake caliper and master cylinder replacement, suspension component replacement, power steering pump replacement, A/C system service, electrical component repair/replacement

Rebuilding:

Detailed instructions for engine rebuilds, transmission rebuilds, differential rebuilds

Depth:

Expert-level, covering everything from basic maintenance to complete engine and transmission rebuilds, including intricate electrical system troubleshooting.

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text for quick information retrieval

Resolution:

High-resolution scans, clear diagrams and illustrations

Illustrations:

Detailed exploded views, wiring diagrams, and step-by-step photographic guides

Binding:

N/A (Digital Format)

Paper Quality:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Option 1:

4.0L Inline-6 'PowerTech' (MPI)

Engine Code 1:

ERH (4.0L)

Engine Displacement 1:

3952 cc (241 cu in)

Horsepower 1:

190 hp @ 4600 rpm

Torque 1:

235 lb-ft @ 3200 rpm

Bore X Stroke 1:

3.88 x 3.41 in (98.5 x 86.7 mm)

Compression Ratio 1:

8.8:1

Fuel Delivery 1:

Sequential Multi-Port Fuel Injection (MPI)

Engine Block Material 1:

Cast Iron

Cylinder Head Material 1:

Aluminum

Engine Option 2:

4.7L V8 'PowerTech' (MPI)

Engine Code 2:

EVC (4.7L)

Engine Displacement 2:

4701 cc (287 cu in)

Horsepower 2:

235 hp @ 4500 rpm (early models), 260 hp @ 5200 rpm (later models with HO option)

Torque 2:

300 lb-ft @ 3200 rpm (early models), 325 lb-ft @ 3800 rpm (later models with HO option)

Bore X Stroke 2:

3.70 x 3.35 in (94.0 x 85.0 mm)

Compression Ratio 2:

8.7:1 (standard), 9.6:1 (HO)

Fuel Delivery 2:

Sequential Multi-Port Fuel Injection (MPI)

Engine Block Material 2:

Aluminum

Cylinder Head Material 2:

Aluminum

Fuel Type:

Unleaded Gasoline (87 octane recommended, 89 or higher for HO V8)

🔧 Transmission

Standard Transmission 1:

4-speed Automatic (42RE)

Standard Transmission 2:

4-speed Automatic (45RFE/545RFE)

Optional Transmission:

4-speed Manual (NV3500 - less common, primarily for 4.0L models)

Transfer Case Options:

Selec-Trac NV242 (2WD/4WD Full-Time), Quadra-Trac II NV247 (4WD with Electronic Traction Control), Quadra-Drive II NV247 (4WD with Electronic Traction Control and Electronic Limited Slip Differentials)

Transmission Fluid Spec 42Re:

ATF+3 (MS-7176E or equivalent)

Transmission Fluid Spec 45Rfe 545Rfe:

ATF+4 (MS-9602 or equivalent)

📐 Dimensions

Wheelbase:

116.1 inches (2949 mm)

Length:

186.0 inches (4724 mm)

Width:

72.4 inches (1839 mm)

Height:

67.4 inches (1712 mm)

Ground Clearance:

8.7 inches (221 mm)

Curb Weight:

4,300 - 4,700 lbs (1950 - 2132 kg) depending on configuration

Gross Vehicle Weight Rating Gvwr:

5,700 - 6,100 lbs (2585 - 2767 kg)

Cargo Volume Behind 2Nd Row:

37.5 cu ft (1062 L)

Cargo Volume With 2Nd Row Folded:

75.2 cu ft (2130 L)

🛡️ Safety Features

NHTSA Rollover Rating:

Four-star (2002 model year)

ABS:

Standard (4-wheel disc brakes with ABS)

Traction Control:

Available (Part of Quadra-Trac II/Quadra-Drive II)

Electronic Stability Control:

Not standard on all models, availability varies by trim and options

Airbags:

Front airbags, optional side-impact airbags

Seatbelts:

3-point seat belts with pretensioners

💡 Technology Features

Audio Options:

AM/FM stereo with CD player, premium Infinity sound system, optional rear seat entertainment system

Navigation:

Optional factory navigation system

Cruise Control:

Standard

Parking Assist:

Not typically available for this model year

Connectivity Features:

Limited by modern standards; primarily analog systems, with some models potentially offering early satellite radio integration.

🔧 Maintenance

Oil Change Interval:

Every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on oil type and driving conditions (refer to manual for specifics).

Engine Oil Type:

SAE 5W-30 (for 4.0L and 4.7L engines, check manual for temperature specific grades)

Engine Oil Capacity 4.0L:

5.0 quarts (4.7 liters) with filter change

Engine Oil Capacity 4.7L:

6.0 quarts (5.7 liters) with filter change

Coolant Type:

Mopar OAT (Organic Additive Technology) Antifreeze/Coolant, HOAT, or equivalent meeting MS-9769 spec (typically orange)

Coolant Capacity:

Approximately 11.5-12.0 quarts (10.9-11.4 liters)

Spark Plug Replacement Interval:

Every 30,000-100,000 miles, depending on spark plug type (e.g., copper vs. platinum/iridium, refer to manual)

Air Filter Replacement Interval:

Every 15,000-30,000 miles or as needed based on inspection

Brake Fluid Type:

DOT 3

Power Steering Fluid Type:

Chrysler Power Steering Fluid (MS-5901) or equivalent ATF+3

Common Issue 1:

Cracked cylinder heads on the 4.7L V8 engine (especially early models). Manual covers inspection and replacement procedures.

Common Issue 2:

Water pump leaks or failures on both engines. Manual details replacement.

Common Issue 3:

Transmission issues, including solenoid pack failures, torque converter issues, and leaks. Manual provides diagnostic and repair steps.

Common Issue 4:

Front axle u-joint wear and potential failure in 4WD models. Manual explains inspection and replacement.

Common Issue 5:

Radiator failures and cooling system leaks. Manual covers flushing and replacement.

Common Issue 6:

Body module (BCM) issues affecting various electrical components. Manual offers diagnostic guidance.

📚 Vehicle History

Jeep Legacy:

Jeep has a long-standing reputation for off-road capability and ruggedness, originating from its military roots in World War II.

Wj Generation Introduction:

The WJ Grand Cherokee replaced the ZJ generation for the 1999 model year, featuring a significant redesign with a more aerodynamic body, improved interior comfort, and updated powertrains.

Wj Generation Facelift:

The WJ received a mid-cycle refresh for the 2002 model year, which included updated front and rear styling, revised interior trim, and the introduction of the more powerful 4.7L High Output V8 engine.

Manufacturing Locations:

Jefferson North Assembly Plant, Detroit, Michigan, USA

Production Years Wj:

1999-2004

🏆 Awards & Recognition

Automotive Journal Recognition:

Often praised for its robust platform, comfortable ride, and superior off-road capabilities compared to many rivals in its class, particularly with Quadra-Drive II.

Towing Capacity:

Up to 6,500 lbs (2948 kg) when properly equipped

Manual Certification:

This repair manual adheres to industry standards for technical documentation, providing accurate and verified procedures.