🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation:

WJ

Model Year:

2002

Chassis Code:

WJ

Drivetrain:

4X4 (Four-wheel drive)

Drive Layout:

Left Hand Drive (LHD)

Engine Options Covered:

4.0L I6, 4.7L V8 (based on typical WJ offerings)

👋 Introduction

Segment:

Mid-size luxury SUV, known for its off-road capability and comfortable ride.

Competitors:

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

Distinguishing Features:

WJ generation offered significant upgrades in interior comfort, refinement, and on-road manners compared to its predecessor (ZJ), while retaining strong Jeep off-road DNA. Known for its distinctive upright grille and available powerful V8 engine.

Owner Profile:

Enthusiasts and owners seeking detailed technical guidance for DIY maintenance and repairs, or professional mechanics working on the vehicle.

📋 Manual Details

Primary Coverage:

Comprehensive service and repair for the 2002 Jeep Grand Cherokee WJ 4x4 (LHD)

Specific Systems:

Engine, Drivetrain, Transmission, Suspension, Brakes, Steering, Electrical, HVAC, Body, Chassis

Estimated Pages:

Over 1500 (typical for comprehensive service manuals of this era)

Type:

Factory Service Manual (FSM) / Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Powertrain:

Engine mechanicals, fuel system, ignition system, cooling system, exhaust system, transmission (automatic and manual if applicable), transfer case, differentials (front and rear), drive shafts, axles.

Chassis And Suspension:

Front and rear suspension systems (e.g., Quadra-Coil, solid axle), steering system, hydraulic power steering, wheel alignment specifications, shock absorbers, springs, control arms, ball joints.

Brakes:

Front and rear brake systems (disc brakes), ABS (Anti-lock Braking System), parking brake, brake fluid specifications, hydraulic lines, caliper and rotor replacement, bleeding procedures.

Electrical:

Battery, charging system (alternator), starting system, lighting systems (headlights, taillights, interior), power accessories (windows, locks, mirrors), instrument cluster, wiring diagrams, fuse and relay locations, diagnostic trouble codes (DTCs).

Comfort And Climate:

HVAC (Heating, Ventilation, and Air Conditioning) system, A/C compressor, refrigerant, blower motor, climate control panels, heater core, cabin air filter replacement.

Body And Interior:

Body panels, doors, windows, mirrors, seats, interior trim, body sealant, rust prevention, paint codes, minor body repair procedures.

Maintenance:

Recommended maintenance schedules, oil change procedures, filter replacements (oil, air, fuel, cabin), fluid checks and top-offs (coolant, brake fluid, power steering fluid, transmission fluid, differential fluid).

Troubleshooting:

Diagnostic procedures for common drivability issues, electrical faults, starting problems, overheating, suspension noises, brake performance issues, utilizing diagnostic trouble codes (DTCs).

Repair And Rebuild:

Step-by-step instructions for component removal, installation, and overhaul of major systems like engines, transmissions, axles, brakes, steering components, and electrical modules.

Diagnostics And Testing:

Specific testing procedures for sensors, actuators, electronic control modules (ECMs/PCMs), fuel injectors, ignition coils, and other critical components. Includes use of diagnostic tools.

Depth Of Coverage:

Comprehensive from basic maintenance to major overhaul and rebuild procedures. Detailed diagnostic flowcharts and technical specifications for accurate repair.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable, enabling quick access to specific information.

Quality:

High-resolution scans suitable for printing and clear viewing of diagrams and text.

Binding:

N/A (Digital PDF format)

Paper Type:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine 1:

4.0L (242 cu in) Inline-6 'Power Tech'

Engine 1 Specs:

Overhead Valve (OHV), Sequential Electronic Fuel Injection (SEFI), ~195 horsepower @ 4600 rpm, ~230 lb-ft torque @ 3200 rpm.

Engine 1 Cylinder Block:

Cast Iron

Engine 1 Cylinder Head:

Aluminum

Engine 2:

4.7L (287 cu in) V8 'Power Tech' Magnum

Engine 2 Specs:

Overhead Valve (OHV), Sequential Electronic Fuel Injection (SEFI), ~235 horsepower @ 4500 rpm, ~295 lb-ft torque @ 3200 rpm.

Engine 2 Cylinder Block:

Cast Iron

Engine 2 Cylinder Head:

Aluminum

Fuel Delivery:

Multi-point fuel injection (MPI) for both engines.

Displacement Options:

4.0L, 4.7L

🔧 Transmission

Transmission 1:

42RE 4-speed Automatic Transmission (typically with 4.0L engine)

Transmission 2:

45RFE 4-speed Automatic Transmission (with higher torque capacity, typically with 4.7L engine)

Transfer Case:

NV242 Selec-Trac (full-time 4WD) or NV247 Quadra-Trac II (part-time 4WD with electronic front differential).

Automatic Transmission Fluid:

ATF+4 (Mopar)

📐 Dimensions

Wheelbase:

116.1 inches (2950 mm)

Length:

181.5 inches (4610 mm)

Width:

71.1 inches (1806 mm)

Height:

66.7 inches (1694 mm)

Curb Weight:

Approx. 4300-4600 lbs (1950-2087 kg), varies by engine and equipment.

🛡️ Safety Features

NHTSA Front Driver Impact:

Good (for 2002 model year, based on available data)

NHTSA Front Passenger Impact:

Good (for 2002 model year, based on available data)

ABS:

Standard, 4-wheel Anti-lock Braking System.

Airbags:

Standard front driver and passenger airbags. Optional side airbags available on some trims.

Seatbelts:

Front seat pretensioners, three-point seat belts for all seating positions.

💡 Technology Features

Audio System:

Factory AM/FM/CD player, optional Infinity Gold premium audio system with amplifier and subwoofer. Cassette player often integrated.

Climate Control:

Manual or optional dual-zone automatic climate control.

Cruise Control:

Standard on most trims.

Tire Pressure Monitoring:

Not typically available on the 2002 model year.

Auxiliary Input:

Not standard. Aftermarket solutions may be available.

🔧 Maintenance

Engine Oil Change:

Every 5,000-7,500 miles (8,000-12,000 km) or 6 months, depending on driving conditions. Consult manual for specific oil type and viscosity.

Transmission Fluid Change:

Every 30,000-50,000 miles (48,000-80,000 km) or as per severe service schedule.

Coolant Flush:

Every 30,000 miles (48,000 km) or 2 years.

Engine Oil Type:

SAE 5W-30 (preferred for both 4.0L and 4.7L, though 10W-30 may be acceptable in warmer climates). Consult manual for specific API service rating.

Coolant:

50/50 mix of Mopar OAT (Orange) Antifreeze/Engine Coolant and distilled water.

Power Steering Fluid:

Mopar Power Steering Fluid or equivalent.

Brake Fluid:

DOT 3

Common Problems:

Cracked cylinder heads (especially on early 4.7L V8 models), death wobble (steering/suspension shimmy), cooling system leaks (radiator, hoses), front differential pinion seal leaks, HVAC blower motor resistor failure, interior trim fitment issues, power window regulator failures.

Transfer Case Issues:

Selec-Trac (NV242) can develop issues with the actuator or range sensor. Quadra-Trac II (NV247) can experience viscous coupler wear.

📚 Vehicle History

Brand Origin:

Jeep, a brand with a storied history in off-road vehicle production, originating from World War II.

Wj Generation Introduction:

The WJ Grand Cherokee was introduced for the 1999 model year, succeeding the ZJ. The 2002 model year represents a mid-cycle update or refinement of the WJ platform.

Production Period:

WJ generation produced from 1999 to 2004.

Manufacturing Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA.

🏆 Awards & Recognition

Off Road Capability:

Consistently recognized for its off-road prowess within its segment, a hallmark of the Jeep brand.

Segment Awards:

While specific awards for the 2002 model year are not prominently cited, the WJ Grand Cherokee was generally well-received for its blend of luxury, comfort, and capability upon its introduction.