This comprehensive service and repair manual for the 1984 Jaguar XJ (XJ40) provides a detailed guide to maintaining, servicing, diagnosing, and repairing your vehicle. It covers all models and repairs, offering the same technical information used by dealership technicians. With step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications, this manual empowers you to perform repairs with confidence.

Navigate through detailed sections covering essential aspects of your vehicle, including:

* **Maintenance:** Learn about routine maintenance schedules, fluid changes, and essential inspections.
* **Engine:** Delve into engine performance, troubleshooting, and repair procedures.
* **Control System:** Gain an understanding of electronic control systems and components.
* **Mechanical:** Explore the workings of your vehicle's mechanical systems, from the transmission and drivetrain to the suspension and brakes.
* **Fuel Service Specifications:** Access detailed information on fuel systems, including injection and delivery.
* **Emission Control:** Learn about emissions systems and how to ensure compliance.
* **Intake Exhaust Cooling:** Understand the workings of your vehicle's cooling system and diagnose any potential issues.
* **Lube:** Find lubrication recommendations and procedures for all components.
* **Ignition Starting Charging:** Explore the intricate workings of the ignition, starting, and charging systems.
* **Auto Transmission Clutch:** Gain insights into automatic and manual transmissions, including repair and maintenance.
* **Transfer Propeller Shaft:** Understand the transfer case and propeller shaft, including troubleshooting and repair information.
* **Drive Shaft:** Learn about the drive shaft and how to diagnose potential problems.
* **Differential:** Explore the differential system and its essential components.
* **Axle Suspension:** Delve into the intricacies of your vehicle's axle and suspension systems.
* **Tire & Wheel:** Find information on tires, wheels, and related components.
* **Brake Control:** Explore the brake control system and learn about its operation.
* **Brake:** Understand brake systems, including troubleshooting and repair procedures.
* **Parking Brake:** Find information on the parking brake system.
* **Steering Column:** Explore the steering column and its components.
* **Power Steering:** Learn about power steering systems and how to diagnose problems.
* **Air Condition:** Gain insights into air conditioning systems and their maintenance.
* **Suppl Restraint System:** Understand the supplemental restraint system (airbags).
* **Seat Belt:** Find information on seat belt systems and their components.
* **Engine Immobilizer:** Learn about the engine immobilizer and its functions.
* **Cruise Control:** Explore cruise control systems and how they operate.
* **Wiper & Washer:** Understand the wiper and washer system.
* **Door Lock:** Learn about door locks and their mechanisms.
* **Meter Audio/Visual:** Find information about the dashboard gauges and visual displays.
* **Horn:** Explore the horn system and its operation.
* **Windshield/Glass Mirror:** Gain insights into windshield, glass, and mirror components.
* **Instrument Panel:** Learn about the instrument panel and its components.
* **Seat:** Find information on seats and their components.
* **Engine Hood/ Door:** Explore engine hood and door mechanisms.
* **Exterior & Interior:** Gain insights into exterior and interior trim and components.
* **Electrical:** Delve into the electrical system of your vehicle, including troubleshooting and repair procedures.
* **Multiplex/ Can Communication:** Understand multiplex and CAN communication systems.

This comprehensive manual provides a wealth of information, empowering you to perform a wide range of repairs and maintenance tasks on your 1984 Jaguar XJ (XJ40) with confidence.

The 1984 Jaguar XJ (XJ40) was a significant milestone in the history of the iconic British marque. Replacing the venerable XJ-S, the XJ40 introduced a bold new design language and a suite of advanced technologies that pushed the boundaries of luxury and performance. The sleek, aerodynamic bodywork, designed by Ian Callum, featured a striking new grille with a distinctive "cat's eye" design and smooth, flowing lines. Inside, the cabin was a bastion of refinement, boasting plush leather upholstery, rich wood trim, and an ergonomically designed dashboard. This car embodied the classic Jaguar virtues of elegance and sophistication, but also showcased a commitment to innovation with features like a fully independent suspension system, power steering, and an advanced electronic instrument cluster.

Under the hood, the XJ40 initially offered a range of powerful inline-six engines, including the 3.6-liter and 4.2-liter units. Later, a 3.2-liter V6 and a potent 4.0-liter V8 joined the lineup. These powerplants provided a compelling blend of smooth acceleration and effortless cruising, allowing the XJ40 to seamlessly navigate both city streets and open highways. However, the XJ40 was not without its challenges. Its complex electronics system and intricate mechanical components were known to be prone to occasional issues, and the car's reputation for reliability suffered as a result. Despite these setbacks, the XJ40 made a lasting impact on the automotive landscape, solidifying the Jaguar XJ's position as a timeless icon of British luxury and performance. Its elegant design and advanced engineering laid the foundation for the future generations of XJ models that would follow.