🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2003

Chassis Code:

WJ

👋 Introduction

Target Audience:

DIY mechanics, Jeep enthusiasts, and independent repair shops.

Value Proposition:

Cost-effective alternative to dealership service, empowering owners to perform their own repairs and maintenance.

Ease Of Use:

Easy to follow, step-by-step instructions suitable for any skill level.

Completeness:

Covers all workshop procedures, ensuring no vital information is omitted.

Accessibility:

PDF format allows for easy access and selective printing.

📋 Manual Details

Comprehensive Coverage:

Yes

Specific Systems:

Engine, Injection/Ignition, Clutch, Gearbox, Suspension, Wheels, Brakes, Control Driving Instructions, Air Temperature Control, Electrical System, Bodywork

Estimated Page Count:

High (exact count not provided, but described as 'extremely detailed')

Type:

Service/Workshop Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine:

Detailed coverage including rebuild procedures.

Fuel System:

Injection and ignition system diagnostics and repair.

Transmission:

Coverage for gearbox and clutch systems.

Drivetrain:

Includes suspension and wheel systems.

Braking System:

Comprehensive brake system repair and maintenance.

Electrical System:

Includes detailed electrical diagrams.

Climate Control:

Air Temperature Control System coverage.

Bodywork:

Includes bodywork procedures.

General Maintenance:

Yes, from basic fluid changes to spark plug replacement.

Engine Repair:

Includes engine rebuilding procedures.

Diagnostic Procedures:

Implied through detailed instructions and diagrams for workshop procedures.

Troubleshooting:

Essential for detailed step-by-step instructions.

Component Replacement:

Detailed instructions for all workshop procedures.

Depth:

Complete workshop coverage, from basic maintenance to engine rebuilding.

Illustrations:

Detailed illustrations, including exploded view diagrams.

Technical Data:

Includes technical data, torque settings, and fluid capacities.

Wiring Diagrams:

Includes electrical diagrams.

Spare Parts:

Contains spare parts illustrations.

📊 Manual Specifications

Type:

PDF

Searchable:

Likely searchable given PDF format, but not explicitly stated.

Printability:

All pages are printable.

Binding:

Digital (PDF) - no physical binding.

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Engine Options 2003 Wj:

4.0L I6 (PowerTech) and 4.7L V8 (High Output PowerTech) were common for the WJ generation. Manual should cover both.

4.0L I6 Power Torque Approx:

Approx. 190-205 hp, 235-255 lb-ft torque (specifics in manual)

4.7L V8 Power Torque Approx:

Approx. 235-250 hp, 295-325 lb-ft torque (specifics in manual)

Injection System:

Multi-point fuel injection (MPI) or Sequential Fuel Injection (SFI) likely covered.

ECU Type:

ECM (Engine Control Module) related diagnostics and information expected.

Coolant Type:

Mopar OAT (Organic Acid Technology) or equivalent, likely specified in manual.

🔧 Transmission

Availability:

While automatic transmissions were dominant in the WJ, manual transmission coverage might be limited or absent depending on the original documentation source. Expect detailed automatic transmission coverage.

Automatic Options:

42RE (for 4.0L) and 45RFE/545RFE (for 4.7L) are common. Manual will detail their maintenance and repair.

Transfer Case:

Coverage for Quadra-Trac II and Select-Trac NV242 transfer cases likely included.

Automatic Transmission Fluid:

Likely specifies ATF+4 (MS-9602) for 45RFE/545RFE and ATF+3 (MS-9227) or equivalent for 42RE. Exact part numbers and specifications are critical and will be in the manual.

📐 Dimensions

Wheelbase:

Approx. 116 inches (specifics in manual)

Length:

Approx. 184.6 inches (specifics in manual)

Curb Weight:

Varies by engine and trim, generally 4200-4700 lbs (specifics in manual)

Towing Capacity:

Up to 5000-6500 lbs depending on configuration. Manual will have specifics and towing guidelines.

🛡️ Safety Features

NHTSA Crash Test Results:

The WJ generation received mixed ratings. Manual may reference safety system maintenance but not specific test results.

ABS:

Anti-lock Braking System (ABS) coverage.

Airbags:

Front airbags, potentially side curtain airbags depending on trim. Manual will detail their operation and related systems.

💡 Technology Features

Audio System:

Various audio systems, including optional Infinity Gold. Manual covers basic system access and troubleshooting.

Cruise Control:

Standard cruise control functionality, maintenance covered in manual.

Trailer Wiring:

Wiring and integration for trailer towing packages covered.

🔧 Maintenance

Oil Change Interval:

Typically 3,000-7,500 miles or 6 months, depending on driving conditions and oil type. Manual will provide precise recommendations.

Transmission Fluid Change:

Recommended every 30,000-60,000 miles for automatic transmissions. Manual specifies intervals for all driveline fluids.

Engine Oil Spec:

Likely SAE 5W-30 for the 4.0L and 4.7L engines, but manual will confirm exact viscosity and API service classification.

Coolant Capacity:

Approx. 11-14 quarts depending on engine. Manual will provide precise capacities.

Common Wj Problems:

Potential issues include radiator leaks, water pump failure, death wobble (steering damper/tie rod wear), PCM failures, and transmission issues (especially 45RFE/545RFE solenoid pack). The manual is crucial for diagnosing and repairing these.

Brake Fluid Spec:

DOT 3 or DOT 4 brake fluid, manual will specify exact type and replacement procedure.

📚 Vehicle History

Jeep Legacy:

Jeep has a long history of producing capable off-road vehicles, with the Grand Cherokee representing its upscale SUV offering.

Wj Generation:

The WJ, produced from 1999 to 2004, was a significant redesign from the ZJ, featuring a unibody construction for improved on-road manners while retaining off-road capability. The 2003 model year saw minor updates.

Manufacturing Plant:

Primarily Jefferson North Assembly Plant, Detroit, Michigan.

🏆 Awards & Recognition

Model Recognition:

The Grand Cherokee WJ was generally well-received for its balance of on-road comfort and off-road capability, often appearing on 'best SUV' lists in its class during its production run.