Target Audience:
Jaguar XJ40 owners, independent repair shops, DIY enthusiasts seeking factory-level repair information.
Value Proposition:
Provides the same detailed, vehicle-specific information used by dealership technicians, offering a significant advantage over generic repair guides.
Key Features Manual:
Complete A-Z coverage, step-by-step instructions, diagrams, illustrations, wiring schematics, specifications, digital format for ease of use and portability.
Engine Systems:
Engine mechanical, fuel system, emission control, cooling system, lubrication system, ignition system, starting and charging system.
Transmission Drivetrain:
Automatic transmission, manual transmission (if applicable to specific models), transfer case, propeller shaft, drive shafts, differential, axles.
Suspension Steering:
Suspension systems, wheels, tires, steering column, power steering.
Brakes:
Brake control system, hydraulic brakes, parking brake.
Climate Control:
Air conditioning system.
Electrical Electronics:
Instrument panel, lighting, wipers and washers, horn, door locks, meters, audio/visual systems, supplemental restraint system (SRS), seat belts, engine immobilizer, cruise control, multiplex/CAN communication (early forms).
Body Chassis:
Body exterior and interior, engine hood, doors, windshield, glass, mirrors.
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, lubrication, inspections.
Diagnostic Procedures:
Troubleshooting guides, symptom analysis, diagnostic flowcharts.
Repair Procedures:
Step-by-step repair instructions for all major systems and components, including engine overhaul, transmission service, brake system repair, electrical component replacement.
Installation Procedures:
Instructions for component installation and adjustment.
Technical Depth:
Comprehensive, covering basic maintenance to advanced diagnostics and complete mechanical rebuilds. Includes factory-level detail.
Compatibility:
Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac OS.
Software Requirements:
Adobe PDF Reader, Winzip (free).
Printability:
All pages are printable, allowing for enlarged image printing.
Binding Type:
N/A (Digital PDF format)
Paper Type:
N/A (Digital PDF format)
Text Search:
Likely searchable text content within the PDF for efficient information retrieval.
Engine Options 1991:
3.2L (3295cc) AJ6 Inline-6 and 4.0L (3980cc) AJ6 Inline-6.
Horsepower 3.2L:
Approximately 200-208 hp (Varies by market and specific tune).
Torque 3.2L:
Approximately 200-205 lb-ft (Varies by market and specific tune).
Horsepower 4.0L:
Approximately 221-235 hp (Varies by market and specific tune).
Torque 4.0L:
Approximately 250-260 lb-ft (Varies by market and specific tune).
Fuel Injection System:
Electronic Fuel Injection (EFI), typically Lucas/Jaguar electronic engine management.
Engine Code Example 3.2L:
Likely prefixed with '903' or similar, specific VIN decoding required.
Engine Code Example 4.0L:
Likely prefixed with '913' or similar, specific VIN decoding required.
Automatic Transmission:
ZF 4HP22 (4-speed automatic) was common, often with a Jaguar-specific control unit.
Manual Transmission:
Manual transmissions were rare in the XJ40 for North America, but may have been available in some markets or as a special order. If present, likely a Getrag unit.
Transmission Fluid Type:
Typically specified as a Dexron III or equivalent automatic transmission fluid (ATF). Consult manual for exact specification.
Safety Ratings Era:
Vehicle safety standards of the era (early 1990s). Official crash test ratings from NHTSA/IIHS may vary by region and may not be directly comparable to modern standards.
Active Safety Features:
Anti-lock Braking System (ABS) standard on most models, power assisted steering.
Passive Safety Features:
Supplemental Restraint System (SRS) for driver and passenger airbags, front and rear crumple zones, energy-absorbing steering column, seat belts.
Infotainment System 1991:
Factory fitted radio/cassette player with speakers. Optional CD player may have been available. Limited digital integration compared to modern vehicles.
Driver Assistance Features:
ABS, cruise control. No modern driver assistance systems like adaptive cruise control, lane keeping assist, etc.
Connectivity Features:
No Bluetooth, USB, or smartphone integration. Communication relies on analog systems.
Engine Management System:
Sophisticated (for its time) electronic engine management system (e.g., Lucas 14CUX or 16CU for fuel injection and ignition timing control).
Oil Change Interval:
Typically every 3,000-6,000 miles or 6-12 months, depending on driving conditions and oil quality. Consult manual for exact interval and oil type.
Coolant Change Interval:
Recommended every 2 years or 30,000 miles for a complete flush and refill. Use appropriate Jaguar-specified coolant.
Transmission Fluid Interval:
Typically every 30,000-50,000 miles for fluid and filter change, but check manual as some sources recommended lifetime fluid for sealed units (though this is often debated).
Engine Oil Specification:
Likely 5W-30 or 10W-40 synthetic or semi-synthetic oil meeting API SG/SH specifications. Specific Jaguar approval codes are crucial.
Coolant Specification:
Ethylene glycol based antifreeze/coolant, typically a 50/50 mix with distilled water. Specific Jaguar-approved coolant types are paramount.
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid. Ensure it is clean and dry. Regular flushing is recommended.
Common Issues Xj40:
Electrical gremlins (especially wiring harness degradation, Lucas components), headliner sagging, self-leveling suspension issues (on some models), ABS sensor failures, exhaust manifold cracks (on some earlier 3.6L engines, less common on 91 MY), heater matrix leaks.
Brand Heritage Summary:
Jaguar, a British luxury car manufacturer, has a long history of producing elegant, powerful, and sporting vehicles, renowned for their craftsmanship and performance.
Model Evolution Xj40:
The XJ40 was a significant redesign from its predecessor, the XJ-S. Introduced in 1986, it featured a more modern, aerodynamic body with integrated bumpers and a sophisticated chassis. The 1991 model year saw continued refinements to the powertrain, electronics, and interior.
Production Years:
1986-1994
Manufacturing Location:
Coventry, England
