🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2002

Chassis Code:

WJ

👋 Introduction

Segment:

Mid-size Luxury SUV

Key Competitors 2002:

Ford Explorer, Chevrolet TrailBlazer/Blazer, Toyota 4Runner, Nissan Pathfinder, Lexus RX300, BMW X5.

Design Philosophy:

Off-road capability blended with on-road comfort and luxury. Emphasized its Jeep heritage while evolving for modern SUV buyers.

Platform Notes:

Built on the updated WJ platform, featuring unibody construction (unlike previous body-on-frame models), providing improved ride quality and handling.

📋 Manual Details

General:

Comprehensive service, repair, and maintenance procedures for the 2002 Jeep Grand Cherokee WJ platform.

Estimated:

Over 2000 pages (typical for a complete factory service manual).

Type:

Factory Service Manual (FSM) / Workshop Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical, cooling system, fuel system, exhaust system, engine electrical, ignition system, starting and charging system.

Drivetrain:

Automatic transmissions (42RE, 45RFE, 545RFE), transfer case (NV242, NV247, NV247-0), axles, driveshafts, propeller shafts, CV joints, differentials (front, rear).

Chassis:

Steering system, suspension system (front and rear independent, solid rear axle options), braking system (ABS, traction control, parking brake), wheels and tires.

Body And Interior:

Body construction, exterior trim, interior trim, seats, HVAC (heating, ventilation, air conditioning), power accessories (windows, locks, mirrors, seats).

Electrical And Electronics:

Wiring diagrams, lighting, fuses and relays, instrument cluster, audio system, power distribution, body control module (BCM), Powertrain Control Module (PCM), anti-theft system.

Maintenance:

Oil changes, fluid checks and replacement (coolant, brake fluid, transmission fluid, power steering fluid, differential fluid), filter replacements, lubrication, tune-ups, battery maintenance.

Diagnostics:

Troubleshooting charts, diagnostic trouble codes (DTCs), symptom-based diagnostics, electrical circuit testing, component testing, scan tool procedures.

Repair:

Engine repair (head gaskets, timing components, seals), transmission overhaul, brake caliper replacement, suspension component replacement, HVAC system repair, electrical component replacement.

Installation:

Component replacement procedures (e.g., alternator, starter motor, fuel pump, water pump), brake pad/rotor replacement, shock/strut replacement.

Depth:

Expert level. Covers complete disassembly, inspection, repair, and reassembly of all major vehicle systems. Includes detailed specifications, tolerances, and torque values.

📊 Manual Specifications

Compatibility:

Viewable on most devices with PDF reader (Adobe Acrobat, etc.). Optimized for digital viewing and printing.

Resolution:

High-resolution scans ensuring clarity of diagrams, schematics, and text. Sharper than typical low-quality photocopies.

Type:

N/A (Digital Download - PDF)

Type:

N/A (Digital Download - PDF)

Feature:

Fully searchable PDF allowing quick access to specific topics and keywords.

Quality:

Detailed diagrams, schematics, and exploded views are integral to the repair procedures.

Scope:

Comprehensive, covering all factory-specified procedures and specifications for the 2002 model year.

⚙️ Engine Specifications

Engine 1:

4.0L Inline-6 (242 CID)

Engine 1 Code:

ERH

Engine 1 Description:

Pushrod OHV, 2 valves per cylinder, cast-iron block, aluminum cylinder head.

Engine 1 Horsepower:

190 hp @ 4600 rpm

Engine 1 Torque:

235 lb-ft @ 3200 rpm

Engine 2:

4.7L V8 (287 CID) 'PowerTech'

Engine 2 Code:

EVE/EVG

Engine 2 Description:

SOHC, 16 valves, cast-iron block, aluminum cylinder heads.

Engine 2 Horsepower:

235 hp @ 4700 rpm

Engine 2 Torque:

295 lb-ft @ 3200 rpm

Injection Type:

Sequential Multi-Port Fuel Injection (MPI) with Distributorless Ignition System (DIS) on 4.0L, and Coil-Near-Plug (CNP) ignition on 4.7L V8.

Coolant Type:

Chrysler HOAT (Hybrid Organic Acid Technology) G-05 coolant, typically a 50/50 mix with distilled water.

4.0L Oil:

SAE 5W-30 API SJ or higher.

4.7L Oil:

SAE 5W-30 API SL or higher.

🔧 Transmission

Transmission Type:

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

Transmission Type:

N/A (Only automatic transmissions offered in 2002)

42Re:

Electronic overdrive, lock-up torque converter.

45Rfe/545Rfe:

More advanced control, additional gear ratios in some configurations (545RFE), lock-up torque converter.

42Re Fluid:

ATF+4 (MS-9602)

45Rfe/545Rfe Fluid:

ATF+4 (MS-9602)

Transfer Case Options:

Selec-Trac (NV242 - full-time 2-speed 4WD), Quadra-Trac II (NV247 - full-time 2-speed 4WD with active center differential), Quadra-Drive (NV247-0 with electronic limited-slip differentials - front and rear).

Nv242 Fluid:

ATF+4 (MS-9602)

Nv247 Fluid:

Special transfer case fluid Mopar P/N 05010100AA or equivalent.

📐 Dimensions

Length:

Approx. 186.1 inches (4727 mm)

Width:

Approx. 73.3 inches (1862 mm)

Height:

Approx. 66.4 inches (1687 mm)

Wheelbase:

Approx. 116.0 inches (2946 mm)

Passenger Volume:

Approx. 105.0 cubic feet (2973 L)

Cargo Volume Behind Rear Seat:

Approx. 39.2 cubic feet (1110 L)

Cargo Volume With Rear Seat Folded:

Approx. 72.4 cubic feet (2050 L)

Curb Weight Min:

Approx. 4350 lbs (1973 kg) for 4.0L model.

Gross Vehicle Weight Rating Gvwr:

Varies by configuration, typically around 5700-6000 lbs.

Max Towing Capacity:

Up to 6,500 lbs (2948 kg) when properly equipped with the 4.7L V8 and towing package.

Standard Tire Size:

P235/65R17 (common on many trims).

Standard Wheel Size:

17-inch aluminum wheels.

Bolt Pattern:

5 x 4.5 inches (5x114.3 mm)

🛡️ Safety Features

NHTSA Front Impact:

Good (driver and passenger, 2002 model specific test results may vary).

NHTSA Side Impact:

Good (front seats, 2002 model specific test results may vary).

IIHS Front Offset Impact:

Acceptable (for earlier WJ models, 2002 improvements may exist).

ABS:

Standard Anti-lock Braking System (ABS) on all wheels.

Traction Control:

Optional (often part of Quadra-Drive or specific packages), typically called 'Traction Control System (TCS)'.

Stability Control:

Not commonly available on 2002 models; Electronic Stability Program (ESP) became more prevalent in later years.

Airbags:

Standard front airbags (driver and passenger). Optional side curtain airbags not widely available on 2002.

Seatbelts:

Front and rear seat belts with pretensioners for front occupants. Child seat LATCH anchors.

💡 Technology Features

Audio Systems:

Various options including AM/FM stereo with CD player, cassette player, and premium Infinity sound systems with subwoofer. Uconnect integration was not standard in 2002.

Cruise Control:

Standard on most trims.

Parking Assist:

Rear parking sensors (ParkSense) became available in later years or aftermarket, not a common factory feature for 2002.

Phone Integration:

Limited to aftermarket Bluetooth kits or cradle-based systems, no integrated Uconnect for this model year.

Climate Control:

Manual or Automatic Climate Control (ACC) depending on trim level. Dual-zone climate control available on higher trims.

Power Features:

Power windows, power door locks, power mirrors, power seats (driver and passenger, often with memory for driver's seat).

🔧 Maintenance

Oil Change Interval:

Every 5,000 to 7,500 miles (8,000 to 12,000 km) or 6 months, whichever comes first, depending on driving conditions and oil used. Check manual for specific recommendations.

Transmission Fluid Change:

Every 30,000 to 60,000 miles (48,000 to 96,000 km) or 3-4 years, depending on usage. ATF+4 is typically long-life, but regular checks and changes are recommended, especially for towing. Check manual for specific recommendations.

Coolant Change Interval:

Initial change at 100,000 miles (160,000 km) or 5 years, then every 50,000 miles (80,000 km) or 3 years thereafter with HOAT coolant.

Spark Plug Replacement:

4.0L: Approx. 100,000 miles. 4.7L V8: Approx. 100,000 miles (check manual for specific plug type and interval).

Power Steering Fluid:

ATF+4 (MS-9602)

Brake Fluid:

DOT 3 (or DOT 4 if specified for certain components).

Differential Fluid Front Rear:

API GL-5, SAE 75W-140 synthetic gear oil. For Quadra-Drive with Trac-Lok, a friction modifier may be required (check manual).

Common Issue 1:

Head Gasket Failure: Particularly on the 4.0L 'PowerTech' 6-cylinder engine. Symptoms include coolant loss, white smoke from exhaust, and overheating. Manual covers diagnosis and replacement.

Common Issue 2:

Transmission Issues: 45RFE/545RFE transmission can develop issues like solenoid pack failure or torque converter clutch shudder. Manual provides diagnostic procedures.

Common Issue 3:

Cooling System Leaks: Radiator, hoses, and water pump can develop leaks. Manual details component removal and replacement.

Common Issue 4:

Liftgate/Tailgate Issues: Latch mechanisms, struts, and related wiring can fail. Manual covers body electrical and latch assembly.

Common Issue 5:

Front Suspension Components: Bushings, ball joints, and tie rod ends can wear out due to the vehicle's weight and intended use. Manual details inspection and replacement.

📚 Vehicle History

Jeep Legacy:

Jeep has a long-standing heritage in off-road vehicles, dating back to World War II. The Grand Cherokee represents its move into the premium SUV market.

Wj Generation Notes:

The WJ generation (1999-2004) was a significant redesign from the ZJ. It introduced a more refined unibody structure, independent front suspension (IFS), and improved interior appointments, positioning it as a more upscale and comfortable SUV than its predecessors.

Manufacturing Location:

Jefferson North Assembly, Detroit, Michigan, USA.

Model Year Introduction:

The WJ Grand Cherokee was introduced for the 1999 model year. The 2002 model year falls within the mid-cycle refresh period for the WJ, with minor updates often occurring annually.

🏆 Awards & Recognition

Automotive Journalism:

The WJ Grand Cherokee often received positive reviews for its blend of on-road comfort and off-road capability, competing well within its segment. Specific awards for the 2002 model year would be documented in automotive press archives.

Consumer Reports Historical:

Consumer Reports ratings for the early WJ generation indicated average to below-average reliability, particularly concerning the powertrain and electrical systems. The manual is crucial for addressing these potential issues.