This comprehensive 1986 Jaguar XJ (XJ40) Service and Repair Manual provides detailed instructions, diagrams, and specifications for maintaining, servicing, diagnosing, and repairing your vehicle. This manual is identical to the one used by technicians at Jaguar dealerships. It covers all models and all repair procedures from A to Z, offering complete step-by-step instructions. You'll find everything you need to confidently tackle any repair, including wiring schematics, illustrations, and specifications. With this manual, you can eliminate the hassle of flipping through multiple books to find the information you need. Print only the pages and diagrams necessary for the specific repair you're working on, saving you time and effort. This manual offers highly detailed factory repair information, ensuring you have access to the most accurate and up-to-date information. The comprehensive content includes:

* **Maintenance:** Regular maintenance procedures and schedules to keep your Jaguar running smoothly.
* **Engine:** Detailed information on engine components, operation, troubleshooting, and repair procedures.
* **Control System:** In-depth coverage of electronic control systems, including diagnostics and repair.
* **Mechanical:** Comprehensive instructions for repairing all mechanical systems, including the transmission, suspension, brakes, and steering.
* **Fuel Service Specifications:** Precise specifications for fuel system components and procedures.
* **Emission Control:** Guidance on emission control systems, diagnostics, and repairs.
* **Intake, Exhaust, and Cooling Systems:** Thorough explanations of these systems, troubleshooting, and repair steps.
* **Lube:** Information on lubrication systems, fluids, and recommended lubricants.
* **Ignition, Starting, and Charging Systems:** Detailed coverage of these electrical systems, including diagnostics and repair.
* **Automatic and Manual Transmission:** Step-by-step instructions for servicing and repairing both types of transmissions.
* **Clutch:** Detailed information on clutch components, operation, troubleshooting, and repair procedures.
* **Transfer Case, Propeller Shaft, and Drive Shaft:** Comprehensive instructions for these components.
* **Differential and Axle:** Detailed coverage of these essential drivetrain components.
* **Suspension:** Information on suspension components, operation, diagnostics, and repair procedures.
* **Tire and Wheel:** Guidance on tire and wheel maintenance, selection, and repair.
* **Brake Control System:** Detailed coverage of brake control systems, diagnostics, and repair.
* **Brake System:** Comprehensive instructions for servicing and repairing the brake system.
* **Parking Brake:** Information on parking brake components and operation.
* **Steering Column:** Detailed coverage of steering column components and repair procedures.
* **Power Steering:** Information on power steering systems, diagnostics, and repairs.
* **Air Conditioning:** Thorough coverage of air conditioning systems, including diagnostics and repair.
* **Supplemental Restraint System:** Explanation of the supplemental restraint system, including airbags.
* **Seat Belt:** Information on seat belt components and operation.
* **Engine Immobilizer:** Guidance on engine immobilizer systems and diagnostics.
* **Cruise Control:** Information on cruise control systems, diagnostics, and repairs.
* **Wiper and Washer Systems:** Detailed coverage of wiper and washer systems.
* **Door Lock System:** Explanation of door lock components and operation.
* **Meter, Audio/Visual, and Horn Systems:** Detailed information on these systems.
* **Windshield, Glass, and Mirror Systems:** Guidance on these systems and repair procedures.
* **Instrument Panel:** Information on instrument panel components and repair.
* **Seat Systems:** Detailed coverage of seat components and repair procedures.
* **Engine Hood and Door Systems:** Information on these systems and repair procedures.
* **Exterior and Interior Components:** Guidance on exterior and interior components and repair procedures.
* **Electrical Systems:** Comprehensive information on electrical systems, including wiring diagrams, diagnostics, and repair.
* **Multiplex/CAN Communication:** Explanation of the multiplex or CAN communication systems.

This manual provides everything you need to maintain and repair your 1986 Jaguar XJ (XJ40) with confidence.

The 1986 Jaguar XJ, internally known as the XJ40, marked a significant turning point for the iconic British marque. It was the first all-new XJ model since the original XJ6 debuted in 1968, and it brought with it a host of modern features and technologies that aimed to modernize the luxury saloon while retaining its inherent elegance and performance. The XJ40 featured a new monocoque body structure, replacing the previous XJ6's separate chassis, resulting in increased rigidity and improved handling. The design was a subtle evolution of the previous generation, with a more aerodynamic profile and subtle styling revisions, further enhancing the XJ's refined and timeless appeal. Under the hood, the XJ40 offered a range of powerful engines, including the 3.6-liter inline-six and the 4.2-liter V8, both known for their smooth and refined nature.

Beyond its mechanical innovations, the XJ40 introduced a number of luxury features that were considered cutting-edge for the time. These included an advanced electronic instrument cluster, power adjustable seats with memory function, and an optional climate control system. The car's interior was also meticulously crafted with high-quality materials, such as leather upholstery and wood trim, reinforcing its status as a luxurious and sophisticated automotive experience. Despite its technological advancements and refined nature, the XJ40 faced some early reliability issues, particularly with its electrical systems and the complex electronic fuel injection system. These problems were addressed over time, but they initially tarnished the car's reputation for durability. Despite these challenges, the XJ40 remains a significant milestone in Jaguar's history, showcasing the brand's commitment to innovation and luxury. It paved the way for future XJ models, further solidifying the XJ's reputation as a true automotive icon.