This comprehensive Factory Service Repair Manual (OEM FSM) is your ultimate guide to repairing, maintaining, rebuilding, refurbishing, or restoring your 2002 Jeep Grand Cherokee WJ WG Diesel. It provides detailed and step-by-step instructions covering all diagnostic and repair procedures, making it an invaluable resource for both professional mechanics and DIY enthusiasts. The manual is meticulously organized into groups, each dedicated to a specific system or component. Within each group, you'll find detailed descriptions, illustrations, diagrams, wiring schematics, and specifications for operation, diagnosis, testing, adjustments, removal, installation, disassembly, and assembly. This comprehensive approach ensures you have everything you need to tackle any repair task with confidence. To help you navigate the manual, a Group Tab Locator is included, allowing you to quickly locate the specific group you need. Each group features a contents section that lists major topics, and an alphabetical index in the back of the manual helps you find the component or system you're looking for. The manual covers a wide array of topics, including: * **Introduction:** An overview of the manual's structure and organization. * **Lubrication & Maintenance:** Guidance on proper lubrication and maintenance schedules for optimal vehicle performance. * **Suspension:** Detailed instructions for diagnosing and repairing suspension components. * **Differential & Driveline:** Comprehensive information on differentials and driveline systems, including removal, installation, and repair procedures. * **Brakes:** Step-by-step guidance for brake system diagnosis, repair, and maintenance. * **Cooling:** Thorough coverage of cooling system components, including troubleshooting and repair procedures. * **Audio/Video:** Instructions for diagnosing and repairing audio and video systems. * **Chime/Buzzer:** Information on chime and buzzer systems, including troubleshooting and repair guidelines. * **Clock:** Detailed instructions for diagnosing and repairing the vehicle's clock. * **Electronic Control Modules:** In-depth information on electronic control modules, including programming and troubleshooting procedures. * **Engine Systems:** Comprehensive coverage of engine systems, including fuel injection, ignition, and emissions control. * **Heated Systems:** Detailed instructions for diagnosing and repairing heated systems, such as heated seats and mirrors. * **Horn:** Instructions for diagnosing and repairing the vehicle's horn. * **Ignition Control:** Information on ignition control systems, including troubleshooting and repair procedures. * **Instrument Cluster:** Comprehensive coverage of the instrument cluster, including diagnosis and repair instructions. * **Lamps:** Detailed information on vehicle lamps, including replacement and troubleshooting procedures. * **Message Systems:** Instructions for diagnosing and repairing message systems, including warning messages and notifications. * **Power Systems:** Comprehensive coverage of power systems, including battery, charging, and electrical troubleshooting. * **Restraints:** Detailed information on restraint systems, including airbags and seatbelts. * **Speed Control:** Instructions for diagnosing and repairing the cruise control system. * **Vehicle Theft Security:** Detailed information on vehicle security systems, including anti-theft devices. * **Wipers/Washers:** Instructions for diagnosing and repairing wiper and washer systems. * **Navigation/Telecommunication:** Information on navigation and telecommunication systems, including troubleshooting and repair procedures. * **Wiring:** Comprehensive wiring diagrams for the entire vehicle, simplifying electrical troubleshooting. * **Engine:** Detailed instructions for diagnosing and repairing engine components. * **Exhaust System:** Information on exhaust systems, including troubleshooting and repair procedures. * **Frame & Bumpers:** Instructions for diagnosing and repairing the vehicle's frame and bumpers. * **Fuel System:** Comprehensive coverage of fuel systems, including fuel pumps, injectors, and lines. * **Steering:** Detailed instructions for diagnosing and repairing steering systems. * **Automatic Transmission:** Comprehensive information on automatic transmissions, including troubleshooting and repair procedures. * **Tires/Wheels:** Instructions for diagnosing and repairing tires and wheels. * **Body:** Information on body panels, trim, and other external components, including repair procedures. * **Heating & Air Conditioning:** Comprehensive coverage of heating and air conditioning systems, including diagnosis and repair procedures. * **Emissions Control:** Detailed information on emissions control systems, including troubleshooting and repair procedures. * **Component and System Index:** An alphabetical index for quickly locating specific components and systems. * **DTC Index:** A list of diagnostic trouble codes (DTCs) and their corresponding descriptions. * **Service Manual Comment Forms:** Forms for providing feedback and suggestions for improving the manual. This detailed and comprehensive manual provides everything you need to confidently maintain and repair your 2002 Jeep Grand Cherokee WJ WG Diesel.

The Jeep Grand Cherokee WJ, produced from 1999 to 2004, represents a significant chapter in the evolution of the iconic American SUV. This generation marked a significant shift for the Grand Cherokee, moving away from the rugged, body-on-frame construction of its predecessors to a more car-like unibody design. The WJ introduced a host of new features, including a refined interior, improved handling, and a wider range of engine options. However, it was the introduction of the 2.7L, 3.0L and 3.2L Mercedes-Benz OM662 turbocharged diesel engine in select markets, particularly in Europe, that truly set this generation apart. This powerful and fuel-efficient diesel engine proved to be a popular choice for European buyers, offering impressive performance and economy. The 2002 Jeep Grand Cherokee WJ, particularly those equipped with the diesel engine, has earned a reputation for reliability and durability. However, as with any vehicle, routine maintenance and timely repairs are crucial to ensuring its longevity and performance. This is where the Jeep Grand Cherokee 2002 WJ WG Diesel Service Repair Manual comes in. This comprehensive manual provides detailed instructions and diagrams covering every aspect of the WJ diesel model, from basic maintenance procedures like oil changes and filter replacements to complex repairs involving engine components, transmission, brakes, and electrical systems. The manual is an indispensable resource for both professional mechanics and DIY enthusiasts looking to maintain and repair their cherished Grand Cherokee.