Jeep Grand Cherokee WG 2002 Service Repair Workshop Manual

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🏷️ Basic Information Identification Make: Jeep Model: Grand Cherokee Generation: WJ Year: 2002 Codes Chassis Code: WJ 👋 Introduction Market Position Segment: Mid-size Luxury SUV Competitive Analysis Competitors: Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery, BMW X5, Mercedes-Benz M-Class. Key Features Strengths: Robust chassis, capable off-road (especially with Quadra-Drive II), comfortable ride, spacious interior, strong engine options. Target Audience: Families, off-road enthusiasts, those seeking a comfortable and capable daily driver with towing and hauling capabilities. 📋 Manual Details Coverage Areas Systems Covered: Engine, Transmission (Automatic & Manual), Drivetrain (4WD/AWD), Suspension, Steering, Brakes, HVAC, Electrical System, Body & Chassis, Fuel System, Exhaust System, Cooling System, Lubrication System, Emission Control, Diagnostic Procedures, Troubleshooting, Wiring Diagrams. Page Count Estimated Page Count: 1500+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete teardown, inspection, and reassembly procedures for all covered engines, including cylinder head, block, pistons, crankshaft, camshafts, timing components, lubrication, and cooling systems. Engine Performance: Fuel injection systems, ignition timing, emission control systems, idle speed control, turbocharger diagnostics (if applicable), and engine management systems. Transmission Automatic: Detailed overhaul, adjustment, diagnosis, and repair procedures for the automatic transmission, including torque converter, valve body, clutch packs, and electronic controls. Transmission Manual: Repair, clutch service, and linkage adjustments for manual transmission variants (if applicable). Drivetrain: Front and rear axle overhaul, differential service, driveshaft repair, CV joints, transfer case (Quadra-Trac, Command-Trac) service, and four-wheel drive system diagnostics. Suspension: Front and rear suspension component replacement (struts, shocks, control arms, ball joints, bushings), alignment specifications, and diagnosis of suspension noise and wear. Steering: Power steering system diagnosis, pump and rack/gearbox replacement, steering linkage repair, and steering column service. Brakes: Disc and drum brake service, ABS system diagnosis and repair, brake...

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Description

🏷️ Basic Information

Identification

Make:

Model:

Grand Cherokee

Generation:

Year:

Codes

Chassis Code:

👋 Introduction

Market Position

Segment:

Mid-size Luxury SUV

Competitive Analysis

Competitors:

Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery, BMW X5, Mercedes-Benz M-Class.

Key Features

Strengths:

Robust chassis, capable off-road (especially with Quadra-Drive II), comfortable ride, spacious interior, strong engine options.

Target Audience:

Families, off-road enthusiasts, those seeking a comfortable and capable daily driver with towing and hauling capabilities.

📋 Manual Details

Coverage Areas

Systems Covered:

Engine, Transmission (Automatic & Manual), Drivetrain (4WD/AWD), Suspension, Steering, Brakes, HVAC, Electrical System, Body & Chassis, Fuel System, Exhaust System, Cooling System, Lubrication System, Emission Control, Diagnostic Procedures, Troubleshooting, Wiring Diagrams.

Page Count

Estimated Page Count:

1500+

Manual Type

Type:

Factory Service Manual / Workshop Manual

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete teardown, inspection, and reassembly procedures for all covered engines, including cylinder head, block, pistons, crankshaft, camshafts, timing components, lubrication, and cooling systems.

Engine Performance:

Fuel injection systems, ignition timing, emission control systems, idle speed control, turbocharger diagnostics (if applicable), and engine management systems.

Transmission Automatic:

Detailed overhaul, adjustment, diagnosis, and repair procedures for the automatic transmission, including torque converter, valve body, clutch packs, and electronic controls.

Transmission Manual:

Repair, clutch service, and linkage adjustments for manual transmission variants (if applicable).

Drivetrain:

Front and rear axle overhaul, differential service, driveshaft repair, CV joints, transfer case (Quadra-Trac, Command-Trac) service, and four-wheel drive system diagnostics.

Suspension:

Front and rear suspension component replacement (struts, shocks, control arms, ball joints, bushings), alignment specifications, and diagnosis of suspension noise and wear.

Steering:

Power steering system diagnosis, pump and rack/gearbox replacement, steering linkage repair, and steering column service.

Brakes:

Disc and drum brake service, ABS system diagnosis and repair, brake fluid flushing, caliper and rotor replacement, parking brake adjustment.

Electrical System:

Complete wiring diagrams, component testing, fuse and relay identification, starter and alternator service, lighting systems, power windows, locks, and remote keyless entry.

HVAC:

Air conditioning system diagnosis, refrigerant recharge, heater core replacement, blower motor service, and climate control unit repair.

Body Chassis:

Body panel alignment, door and glass service, interior trim removal and installation, rust repair, chassis lubrication, and frame inspection.

Safety Systems:

Airbag system diagnosis and service, seat belt mechanisms, and safety restraint systems.

Procedures Included

Diagnostic Procedures:

Step-by-step troubleshooting guides for common symptoms, diagnostic trouble code (DTC) interpretation and clearing, and component testing methodologies.

Maintenance Procedures:

Routine maintenance tasks such as oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, and belt inspection/replacement.

Repair Procedures:

Detailed instructions for component removal, installation, and adjustment for all major vehicle systems.

Rebuild Procedures:

Comprehensive guides for the complete overhaul of engines, transmissions, and differentials.

Wiring Diagrams:

Full color, detailed wiring schematics for all electrical systems, including component locations and connector pinouts.

Technical Depth

Depth:

Extensive. Covers everything from basic maintenance to complex engine and transmission overhauls, advanced electrical diagnostics, and body repair.

📊 Manual Specifications

File Format

Searchable Text:

Printable:

Print Quality

Resolution:

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

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Option 1:

4.0L (3956cc) PowerTech I6 (AMC 242)

Engine Option 1 Displacement:

4.0 Liters

Engine Option 1 Configuration:

Inline-6 Cylinder

Engine Option 1 Horsepower:

195 hp @ 4600 rpm

Engine Option 1 Torque:

230 lb-ft @ 3000 rpm

Engine Option 1 Block Material:

Cast Iron

Engine Option 1 Head Material:

Aluminum Alloy

Engine Option 2:

4.7L (4701cc) PowerTech V8 (High Output)

Engine Option 2 Displacement:

4.7 Liters

Engine Option 2 Configuration:

V8 Cylinder

Engine Option 2 Horsepower:

235 hp @ 4500 rpm (standard), 260 hp @ 5000 rpm (High Output)

Engine Option 2 Torque:

300 lb-ft @ 3200 rpm (standard), 325 lb-ft @ 3800 rpm (High Output)

Engine Option 2 Block Material:

Aluminum Alloy

Engine Option 2 Head Material:

Aluminum Alloy

Performance

Top Speed Estimated:

115 mph (electronically limited)

0-60 Mph Estimated:

8.0 - 9.5 seconds (depending on engine and drivetrain)

Fuel System

Fuel Delivery:

Multi-point Fuel Injection (MPI)

Recommended Fuel:

87 Octane Unleaded (4.0L I6), 87 Octane Unleaded (4.7L V8 standard), 91 Octane Unleaded (4.7L V8 High Output recommended)

Fuel Tank Capacity:

20.5 gallons (77.6 L)

🔧 Transmission

Standard

Transmission Type Standard:

4-speed Automatic (42RE for 4.0L I6, 45RFE/545RFE for 4.7L V8)

Optional

Transmission Type Optional:

5-speed Manual (NV3500 for 4.0L I6 - rare)

Features

Transfer Case Options:

Selec-Trac NV231J (part-time 4WD), Quadra-Trac II NV247 (full-time 4WD with 2-speed transfer case), Quadra-Drive II NV247 with Vari-Lok Differentials (front & rear - optional).

Transmission Fluid Spec 42Re:

ATF+4 (MS-9602)

Transmission Fluid Spec 45Rfe 545Rfe:

ATF+4 (MS-9602)

📐 Dimensions

Exterior

Length:

184.6 inches (4690 mm)

Width:

74.8 inches (1899 mm)

Height:

66.6 inches (1692 mm)

Wheelbase:

116.0 inches (2946 mm)

Ground Clearance:

8.7 inches (221 mm) with standard tires

Approach Angle:

35.2 degrees

Departure Angle:

28.0 degrees

Breakover Angle:

20.7 degrees

Interior

Seating Capacity:

Cargo

Cargo Volume Behind Rear Seat:

39.3 cubic feet (1113 L)

Cargo Volume With Rear Seat Folded:

76.3 cubic feet (2161 L)

Weights

Curb Weight Min:

4259 lbs (1932 kg) (4.0L I6 2WD)

Curb Weight Max:

4790 lbs (2173 kg) (4.7L V8 AWD)

Gross Vehicle Weight Rating Gvwr:

5700 lbs (2585 kg) - 6000 lbs (2722 kg) (depending on configuration)

Towing Capacity:

Up to 5000 lbs (2268 kg) (with proper equipment)

🛡️ Safety Features

Ratings

NHTSA Frontal Impact Driver:

4 Stars

NHTSA Frontal Impact Passenger:

4 Stars

NHTSA Side Impact Front Driver:

5 Stars

NHTSA Side Impact Front Passenger:

5 Stars

NHTSA Rollover Rating:

3 Stars (50% chance of rollover)

Active Features

Standard (4-wheel disc brakes with ABS)

Traction Control:

Optional (Trak-Lok, or part of Quadra-Drive II)

Electronic Stability Control Esc:

Not available for 2002 model year.

Passive Features

Airbags Front:

Standard driver and front passenger airbags

Airbags Side:

Optional front-seat side airbags

Seatbelts:

3-point front seatbelts with pretensioners, rear seat belts.

💡 Technology Features

Infotainment

Audio System:

Optional premium audio systems from Infinity, with CD player, cassette deck, and steering wheel mounted audio controls.

Navigation:

Optional factory navigation system.

Driver Assistance

Cruise Control:

Standard

Parking Assist:

Optional rear parking assist sensors.

Connectivity

Remote Keyless Entry:

Optional

Power Features:

Power windows, power door locks, power mirrors, power seats (optional).

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6 months, whichever comes first (refer to manual for specific engine/oil type).

Air Filter Replacement:

Every 15,000 - 30,000 miles (24,000 - 48,000 km) or as needed based on driving conditions.

Spark Plug Replacement 4.0L:

Every 100,000 miles (160,000 km) with OE-type spark plugs.

Spark Plug Replacement 4.7L:

Every 100,000 miles (160,000 km) with OE-type spark plugs.

Coolant Flush:

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

Transmission Fluid Change:

Every 30,000 - 60,000 miles (48,000 - 96,000 km) (depending on towing/severe use).

Fluid Specifications

Engine Oil Type 4.0L:

SAE 5W-30 (API SM or higher, or equivalent)

Engine Oil Capacity 4.0L:

6.0 quarts (5.7 L) with filter

Engine Oil Type 4.7L:

SAE 5W-30 (API SM or higher, or equivalent)

Engine Oil Capacity 4.7L:

6.0 quarts (5.7 L) with filter

Coolant Type:

Chrysler HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant (50/50 mix with distilled water)

Power Steering Fluid:

ATF+4 (MS-9602) or Mopar Power Steering Fluid

Brake Fluid:

DOT 3

Known Issues

Common Problems:

Radiator end-tank leaks (plastic tanks), heater core leaks, differential seal leaks (front and rear), ABS sensor failures, death wobble (front track bar/steering components), exhaust manifold cracks (4.7L V8), PCM failure, transfer case chain stretch (Quadra-Trac II).

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Jeep has a long-standing heritage in off-road vehicles, dating back to World War II. The Grand Cherokee lineage began in 1993 as a more luxurious and comfortable alternative to the Wrangler.

Model Evolution

Wj Generation Debut:

The WJ Grand Cherokee debuted for the 1999 model year, replacing the ZJ generation. It was a significant redesign, focusing on improved on-road manners, a more refined interior, and enhanced luxury.

Wj Generation Updates 2002:

The 2002 model year saw minor updates, including the introduction of the 'High Output' version of the 4.7L V8 engine and revised option packages.

Production

Manufacturing Location:

Detroit, Michigan, USA; Graz, Austria (for some European markets).

Production Years Wj:

1999-2004

🏆 Awards & Recognition

Recognitions

Off Road Capability:

Consistently recognized for its off-road prowess, particularly models equipped with Quadra-Drive II.

Value Proposition:

Often cited in automotive reviews for its balance of luxury, capability, and value compared to European luxury SUVs.

Ratings

Consumer Reports:

Variable consumer satisfaction ratings, often citing reliability concerns in certain areas, making a comprehensive service manual essential for owners.