🏷️ Basic Information

Make:

Jaguar

Model:

XJ Series (XJ6, XJ12, Sovereign)

Model Variant:

XJS, Daimler Double Six

Model Years Covered:

1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994

Chassis Codes:

XJ40 (XJ6/Sovereign), XJ-S (XJS/Sovereign), XJ12/Daimler Double Six

👋 Introduction

Segment:

Luxury Grand Tourer and Executive Sedan

Target Audience:

Owners seeking to perform their own maintenance and repairs on Jaguar XJ, XJS, and Daimler vehicles.

Competitors:

BMW 7 Series, Mercedes-Benz S-Class, Rolls-Royce Silver Spirit/Spirit II, Bentley Eight/Mulsanne during the covered period.

Value Proposition:

Empowers owners to maintain and repair their classic luxury vehicles, saving significant costs associated with dealership servicing. Provides in-depth technical knowledge.

Ease Of Use:

Step-by-step instructions and illustrations designed to make complex procedures manageable for DIY mechanics.

📋 Manual Details

Primary Coverage:

Complete Workshop Service Repair

Secondary Coverage:

Maintenance, Troubleshooting, Diagnostics, Component Repair, Reassembly, Electrical Systems, Bodywork, Wiring Diagrams

Estimated Page Count:

Varies by specific model/year, typically extensive (800-1500+ pages for a complete set)

Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable Digital Format (PDF)

📖 Manual Coverage

Powertrain:

Engine (AJ6, AJ16 I6, V12 HE), Fuel System, Ignition System, Exhaust System

Transmission:

Automatic Transmissions (e.g., ZF 4HP22, GM 4L80E), Manual Transmissions (less common for these models)

Chassis:

Suspension (Independent Rear Suspension), Steering, Brakes (ABS), Wheels and Tires

Electrical:

Engine Management Systems, Lighting, Instrumentation, Audio, Climate Control, Power Accessories, Wiring Harnesses, Diagnostic Connectors

Bodywork:

Exterior Panels, Interior Trim, Seating, Glass, Doors, Locks, Body Sealing

Routine Maintenance:

Oil Changes, Filter Replacements, Fluid Checks, Spark Plug Replacement, Belt Inspections

Major Repairs:

Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Overhaul, Electrical Component Diagnosis and Repair

Diagnostics:

Troubleshooting guides, fault code interpretation (OBD-I era), diagnostic procedures for all major systems

Technical Data:

Torque specifications, clearances, fluid capacities, electrical schematics, wiring diagrams

Depth:

Comprehensive, covering everything from basic preventative maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High-resolution scans of original factory manuals, ensuring clarity of text and diagrams. Printable on standard paper sizes.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Text Search:

Likely OCR'd for searchable text, facilitating quick access to specific information.

⚙️ Engine Specifications

Xj6 Sovereign Engine:

4.0L AJ6 Inline-6 (Dual Overhead Camshafts, Electronic Fuel Injection)

Xj12 Sovereign Engine:

5.3L V12 HE (High Efficiency) (Dual Overhead Camshafts, Electronic Fuel Injection)

Xjs Sovereign Engine:

4.0L AJ6 Inline-6, 5.3L V12 HE (depending on year and trim)

Daimler Double Six Engine:

5.3L V12 HE (Dual Overhead Camshafts, Electronic Fuel Injection)

Xj6 Power Output:

Approx. 225-245 hp (depending on year/market)

Xj12 Power Output:

Approx. 260-290 hp (depending on year/market)

Fuel Delivery:

Lucas/Bosch Electronic Fuel Injection (EFI) with multi-point injection.

Ignition Type:

Electronic Ignition (Distributorless in later AJ6 models)

ECU Details:

Jaguar Electronic Engine Management (JEEM) systems for AJ6 and V12 engines. Diagnostic procedures for these ECUs will be detailed.

🔧 Transmission

Xj6 Standard Transmission:

4-Speed Automatic (ZF 4HP22)

Xj12 Standard Transmission:

3-Speed or 4-Speed Automatic (GM THM400 or ZF 4HP22, depending on year)

Xjs Transmission Options:

4-Speed Automatic (ZF 4HP22), potentially 4-speed manual (Getrag) on earlier XJ-S models.

Automatic Features:

Electronically controlled or hydraulic control systems, including torque converter lock-up for improved efficiency.

📐 Dimensions

Wheelbase:

XJ40: 113 inches; XJS: 102 inches

Overall Length:

XJ40: Approx. 197-200 inches; XJS: Approx. 193-196 inches

Curb Weight:

XJ6/Sovereign: Approx. 3800-4100 lbs; XJ12/Daimler: Approx. 4200-4400 lbs; XJS: Approx. 3800-4200 lbs

🛡️ Safety Features

Crash Test Data:

Limited official crash test data readily available for these specific years from modern agencies. Rely on structural integrity and passive safety features typical of Jaguar luxury vehicles of the era.

Braking System:

Anti-lock Braking System (ABS) standard on most models, typically Lucas Girling or Bosch ABS.

Traction Control:

Traction Control System (TCS) available on later models, particularly V12 variants.

Airbags:

Driver's side airbag introduced in later XJ40 models (approx. 1990 onwards). Passenger airbags not standard on most covered models.

Seatbelts:

3-point inertia reel seatbelts with pre-tensioners (on later models).

💡 Technology Features

Audio System:

Premium audio systems from manufacturers like Clarion or Bose, often with cassette tape players and multi-speaker configurations. CD changers were optional on later models.

Cruise Control:

Electronic cruise control system standard on most models.

Diagnostic Ports:

OBD-I style diagnostic connectors for engine management systems. Specific Jaguar proprietary diagnostic tools may have been used.

System Type:

Automatic climate control (ECC - Electronic Climate Control) with individual temperature and fan speed settings, often incorporating cabin air filtration.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles or 12 months, whichever comes first, depending on oil type and driving conditions.

Major Service Interval:

Includes spark plug replacement, coolant flush, transmission fluid service at intervals of 30,000-60,000 miles or as specified.

Engine Oil:

API SG or higher. Viscosity typically 10W-40 or 20W-50, depending on climate and specific engine recommendations (e.g., Castrol GTX).

Coolant:

Ethylene Glycol-based coolant, typically a 50/50 mix with distilled water. Jaguar recommends specific coolant types; consult manual for exact specifications to prevent corrosion.

Transmission Fluid Xj:

ZF 4HP22 requires ZF LifeguardFluid 5 (or equivalent approved fluid like Esso LT 71141). GM transmissions require Dexron III (or equivalent).

Brake Fluid:

DOT 3 or DOT 4 glycol-based brake fluid.

Xj40 Common Issues:

Headlight leveling issues, water ingress into ECUs, door seal degradation, potential for 'greening' of dashboard warning lights (contact issues), cooling system leaks (especially water pump and hoses), starter solenoid problems.

Xj-S Common Issues:

Rust (particularly around wheel arches, sills, and rear subframe mountings), fuel hose degradation, heater matrix leaks, HEV (High Efficiency) system complexities, rear spring shackle wear.

V12 Engine Specific:

Ignition system complexity (some models had twin plugs per cylinder), V-belts, coolant system, and fuel injection tuning can be intricate. Proper timing and fuel mixture are critical.

📚 Vehicle History

Jaguar Legacy:

Jaguar's long-standing reputation for performance, luxury, and elegant design, dating back to Sir William Lyons.

Xj40 Introduction:

The XJ40 (XJ6/Sovereign) replaced the Series III XJ and represented a significant modernization in design, technology, and production methods for Jaguar. Featured new engines and improved aerodynamics.

Xj-S Evolution:

The XJ-S (XJS) evolved from the sporty XJ-S model, offering both 6-cylinder and V12 options, focusing on grand touring comfort and performance. Covered period represents later, refined iterations.

Daimler Positioning:

Daimler models offered a higher level of luxury and refinement compared to their Jaguar counterparts, often featuring exclusive trim and branding.

Manufacturing Location:

Coventry, England

🏆 Awards & Recognition

General Accolades:

Jaguar vehicles of this era were consistently recognized for their luxurious interiors, refined ride quality, and powerful engines, particularly the V12. Often featured in 'best luxury car' lists of their time.