Jeep Grand Cherokee WG 2002 Factory Service Repair Manual

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🏷️ Basic Information Identification Make: Jeep Model: Grand Cherokee Year: 2002 Chassis Code: WJ Codes Product Code: JGC02WJSM Oem Manual Identifier: Official Factory Service Manual 👋 Introduction Market Position Segment:...

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Description

🏷️ Basic Information

Identification

Make:

Model:

Grand Cherokee

Year:

Chassis Code:

Codes

Product Code:

JGC02WJSM

Oem Manual Identifier:

Official Factory Service Manual

👋 Introduction

Market Position

Segment:

Mid-size Luxury SUV

Target Audience:

Jeep Grand Cherokee owners, independent repair shops, automotive technicians

Competitive Analysis

Competitors 2002:

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

Key Features Vehicle

Premium Features:

Quadra-Drive II 4WD system, luxurious interior appointments, strong towing capability

Key Features Manual

Value Proposition:

Official factory data ensures accuracy for all repair and maintenance tasks, saving time and money.

📋 Manual Details

Coverage Areas

Primary Coverage:

North America

Secondary Coverage:

Global (relevant for WJ platform)

Page Count

Estimated Pages:

1800+

Manual Type

Type:

Factory Service Repair Manual

Scope:

Comprehensive Repair and Diagnostics

Language

Language:

English

Format

Format:

Downloadable PDF

📖 Manual Coverage

Systems Covered

Powertrain:

Engine (4.0L, 4.7L), Transmission (42RE, NV3500, 45RFE), Transfer Case (NV231, NV242)

Chassis:

Suspension (Front/Rear), Steering, Brakes (ABS/Non-ABS), Driveline (Axles, Driveshafts)

Electrical:

Body Control Module (BCM), Powertrain Control Module (PCM), Lighting, HVAC Control, Audio Systems, Security Systems, Instrument Cluster

Body:

Interior Trim, Exterior Panels, Doors, Glass, Seats, Roof Systems

Procedures Included

Maintenance:

Fluid changes, filter replacements, lubrication, scheduled inspections

Troubleshooting:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting charts, electrical schematics

Repair:

Component removal and installation, sub-assembly repair, internal component servicing

Diagnostics:

Engine performance, transmission operation, electrical system faults, HVAC performance

Specifications:

Torque values, clearances, fluid capacities, electrical resistance/voltage checks

Technical Depth

Depth:

Complete factory-level repair and diagnostics

Rebuild Procedures:

Engine, transmission, and axle rebuilds included

Special Tools:

Identification and usage of specialized tools required for specific repairs

📊 Manual Specifications

File Format

Format:

PDF (Portable Document Format)

Searchability:

Text-searchable (OCR processed where applicable)

Print Quality

Resolution:

High resolution for clear diagrams and text

Reproducibility:

Suitable for printing sections or entire manual

Binding Type

Binding:

N/A (Downloadable PDF)

Paper Type

Paper Type:

N/A (Downloadable PDF)

⚙️ Engine Specifications

Primary Engine

Engine 1 Displacement:

4.0L (242 ci)

Engine 1 Type:

Inline 6-Cylinder, Overhead Valve (OHV)

Engine 1 Block Material:

Cast Iron

Engine 1 Head Material:

Cast Iron

Engine 1 Bore X Stroke:

3.875 in x 3.560 in (98.4 mm x 90.4 mm)

Engine 1 Compression Ratio:

8.7:1

Engine 1 Horsepower:

190 hp @ 4600 rpm

Engine 1 Torque:

235 lb-ft @ 3200 rpm

Secondary Engine

Engine 2 Displacement:

4.7L (287 ci) V8

Engine 2 Type:

V8, Single Overhead Camshaft (SOHC)

Engine 2 Block Material:

Aluminum

Engine 2 Head Material:

Aluminum

Engine 2 Bore X Stroke:

3.70 in x 3.31 in (94.0 mm x 84.1 mm)

Engine 2 Compression Ratio:

9.0:1

Engine 2 Horsepower:

235 hp @ 4500 rpm

Engine 2 Torque:

295 lb-ft @ 3500 rpm

Fuel System

Fuel System Type:

Electronic Fuel Injection (EFI)

Fuel Requirement:

Unleaded Regular (87 Octane)

🔧 Transmission

Standard Transmission

Transmission 4L Type:

42RE Automatic (4-speed)

Transmission 4L Gear Ratios:

2.45:1 (1st), 1.45:1 (2nd), 1.00:1 (3rd), 0.69:1 (4th), 2.00:1 (Reverse)

Optional Transmission

Transmission V8 Type:

45RFE Automatic (4-speed electronically controlled)

Transmission V8 Gear Ratios:

3.00:1 (1st), 1.67:1 (2nd), 1.00:1 (3rd), 0.75:1 (4th), 2.25:1 (Reverse)

Transmission Manual Type:

NV3500 Manual (5-speed) - Less Common

Features

Transfer Case 1:

NV231 Command-Trac (Part-time 4WD)

Transfer Case 2:

NV242 Selec-Trac (Full-time 4WD)

4Wd System:

Quadra-Trac II (NV247 transfer case with Vari-Lok differentials) on some models

4Wd System Advanced:

Quadra-Drive II (with Vari-Lok differentials and electronic sway bar disconnect) on select high-trim models

📐 Dimensions

Exterior

Wheelbase:

116.0 inches (2946 mm)

Length:

189.8 inches (4821 mm)

Width:

74.0 inches (1880 mm)

Height:

67.5 inches (1714 mm)

Weights

Curb Weight Min:

4260 lbs (1932 kg)

Curb Weight Max:

4700 lbs (2132 kg)

Towing Capacity:

Up to 6,500 lbs (2948 kg)

Gvw Max:

5,900 - 6,300 lbs (2676 - 2858 kg) depending on configuration

🛡️ Safety Features

Ratings

NHTSA Front Impact Driver:

4/5 Stars (2002 Model Year)

NHTSA Front Impact Passenger:

4/5 Stars (2002 Model Year)

NHTSA Side Impact Front Seat:

3/5 Stars (2002 Model Year)

NHTSA Side Impact Rear Seat:

4/5 Stars (2002 Model Year)

Active Features

Standard (4-wheel disc brakes with ABS)

Traction Control:

Optional (Traction Control System - TCS)

Stability Control:

Not available on this model year

Passive Features

Airbags Front:

Standard (Driver and Passenger Front Airbags)

Airbags Side:

Optional (Front Seat-Mounted Side Airbags)

Seatbelts:

3-point front and rear seatbelts

💡 Technology Features

Infotainment

Audio System Options:

Factory AM/FM/CD player, optional Infinity speaker system, optional CD changer.

Navigation:

Optional factory GPS navigation system.

Driver Assistance

Cruise Control:

Standard

Parking Sensors:

Optional rear park assist sensors.

Connectivity

Telematics:

Optional 'Jeep/Chrysler' telematics system (limited functionality by modern standards).

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6 months, whichever comes first.

Air Filter Replacement:

Every 15,000 - 30,000 miles (24,000 - 48,000 km)

Spark Plug Replacement 4.0L:

Every 30,000 - 60,000 miles (48,000 - 96,000 km) (Copper/Platinum)

Spark Plug Replacement 4.7L:

Every 60,000 - 100,000 miles (96,000 - 160,000 km) (Iridium)

Transmission Fluid Change:

Every 30,000 - 60,000 miles (48,000 - 96,000 km), depending on driving conditions.

Fluid Specifications

Engine Oil Spec 4.0L:

API SN/SM/SL/SJ/SG, SAE 5W-30

Engine Oil Spec 4.7L:

API SN/SM/SL/SJ/SG, SAE 5W-30

Coolant Type:

Chrysler/Mopar HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant, Blue or equivalent

Transmission Fluid 42Re:

Mopar ATF+4 (MS-9602) or equivalent

Transmission Fluid 45Rfe:

Mopar ATF+4 (MS-9602) or equivalent

Brake Fluid Type:

DOT 3 or DOT 4

Power Steering Fluid:

Mopar Power Steering Fluid or equivalent

Known Issues

Common Issue 1:

Cracked cylinder heads on 4.7L V8 (early production) - addressed via service bulletins.

Common Issue 2:

Front differential failure, especially with Quadra-Drive systems under heavy off-road use.

Common Issue 3:

Water pump leaks on 4.0L engine.

Common Issue 4:

PCM (Powertrain Control Module) failure, leading to various engine drivability issues.

Common Issue 5:

Blend door actuator failure in HVAC system, causing temperature control problems.

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Jeep's long history of producing capable off-road vehicles and SUVs dating back to WWII.

Model Evolution

Wj Generation Intro:

The WJ Grand Cherokee replaced the ZJ generation in 1999, representing a significant redesign with a more refined ride and premium interior.

Wj Generation Updates:

The 2002 model year saw minor updates, including revised interior trim and optional features, building on the successful 1999-2001 platform.

Production

Production Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA

Production Years:

1999-2004

🏆 Awards & Recognition

Recognitions

Four Wheeler Magazine Title:

Four Wheeler Magazine's 'Four Wheeler of the Year' (for the previous generation ZJ, setting a precedent for the Grand Cherokee line).

Ciad Award 2002:

Considered a strong contender in its segment by automotive critics during its production run.