🏷️ Basic Information Identification Make: Jaguar Model: XJ6 Year: 1991 Generation Generation Designation: XJ40 Generation Years: 1986-1994 Codes Chassis Code: XJ40 👋 Introduction Market Position Vehicle Segment: Luxury Executive Sedan Target Audience: Affluent professionals seeking comfort, refinement, and classic British motoring. Competitive Analysis Key Competitors Era: BMW 7 Series, Mercedes-Benz S-Class, Audi V8 Quattro, Lexus LS 400. Unique Selling Proposition: Elegant styling, refined ride, and Jaguar's distinctive character. Key Features Design Philosophy: Evolution of the classic Jaguar silhouette with modern interpretation, featuring distinctive quad headlamps and a prominent grille. Interior Appointments: Typically featured Connolly leather, real wood veneers, and a spacious, comfortable cabin. 📋 Manual Details Coverage Areas Comprehensive Coverage: Yes, full service and repair Geographic Coverage: Likely global, with focus on North American and European specifications Page Count Estimated Page Count: Over 1500 pages (typical for comprehensive factory service manuals) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Software (likely digital PDF or proprietary application) 📖 Manual Coverage Systems Covered Engine: 3.2L and 4.0L AJ6 inline-six, including troubleshooting, diagnosis, and overhaul. Engine Management: Electronic Fuel Injection (EFI), ignition systems, sensors, actuators, and diagnostic codes. Transmission: ZF 4HP22 automatic transmission, including operation, diagnosis, and repair procedures. Drivetrain: Rear-wheel drive, driveshafts, differential, and axle assemblies. Suspension: Independent front and rear suspension, including spring rates, damper specifications, bushings, and geometry adjustments. Brakes: Front and rear disc brakes, Anti-lock Braking System (ABS) - Lucas Girling or Bosch variants, hydraulic systems, and rotor/pad specifications. Steering: Power-assisted steering system, including pump, rack, and linkage components. Electrical System: Complete wiring diagrams, fuse box layouts, lighting systems, starter, alternator, and battery specifications. HVAC: Air conditioning and heating systems, refrigerant charging, climate control unit diagnosis. Body: Exterior body panels, trim, doors, windows, latches, and sealing. Interior: Seats, upholstery, dashboard, trim panels, and interior accessories. Fuel System: Fuel pump, fuel filter, injectors, lines, and tank maintenance. Exhaust System: Manifolds, catalytic converters, mufflers, and pipework. Procedures Included Scheduled Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspections, and lubrication. Troubleshooting: Systematic diagnosis of common and uncommon problems with guided fault finding. Repair Overhaul: Detailed step-by-step instructions for component removal, repair, and reassembly. Diagnostics: On-board diagnostics (OBD) interpretation, diagnostic trouble codes (DTCs), and signal analysis. Adjustment Calibration: Engine timing, idle speed, steering alignment, and brake system bleeding. Disassembly Reassembly: Complete engine and transmission rebuild procedures. Technical Depth Depth: Factory-level technical detail, suitable for professional technicians and serious enthusiasts. Diagnostic Tools: Information on specialized tools and equipment required for specific procedures. Schematics: Comprehensive electrical and vacuum schematics with component identification. 📊 Manual Specifications File Format Digital Format: Likely PDF with high resolution for clarity, potentially searchable text. Print Quality Image Resolution: High-resolution, suitable for viewing diagrams and illustrations on screen or printing. Binding Type Digital Format Characteristics: No physical binding; accessed via compatible software or viewer. Paper Type Digital Content Quality: Content mirrors original factory manual quality, with clear text and diagrams. ⚙️ Engine Specifications Primary Engine Engine Code: AJ6 Engine Type: DOHC Inline-Six Displacement: 3.2L (3200cc) and 4.0L (3980cc) Bore X Stroke 4.0L: 91 mm x 102 mm Compression Ratio 4.0L: 9.25:1 Performance Horsepower 4.0L Est: 221 hp @ 4750 rpm Torque 4.0L Est: 270 lb-ft @ 3750 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPFI) Fuel Type: Unleaded Premium Gasoline (91 octane or higher recommended) Fuel Tank Capacity: 84 liters (22.2 US gallons) 🔧 Transmission Standard Type: ZF 4HP22 4-speed automatic Optional Manual Transmission Availability: Not typically offered in North America for 1991 XJ6 models. Features Transmission Control: Electronic control with Comfort and Sport modes. Transmission Fluid Type: Dexron III or equivalent (check manual for specific OEM part number) 📐 Dimensions Exterior Length: Approx. 5000 mm (196.9 inches) Width: Approx. 1790 mm (70.5 inches) Height: Approx. 1370 mm (53.9 inches) Wheelbase: Approx. 2870 mm (113.0 inches) Weights Curb Weight: Approx. 1750 kg (3858 lbs) Gross Vehicle Weight Rating: Approximately 2200 kg (4850 lbs) 🛡️ Safety Features Ratings NHTSA Rating Era: Unspecified by modern standards, but designed to meet 1990s safety regulations. Active Features ABS: Standard Anti-lock Braking System (Lucas Girling or Bosch) Traction Control: Optional (some later models may have had it, but likely not standard on '91 XJ6). Passive Features Airbags: Driver's side airbag standard. Passenger airbag may have been optional or not available on all trims. Seatbelts: Three-point inertia-reel seatbelts with pretensioners (front). Body Construction: Integrated safety cage, crumple zones, and side-impact protection beams. 💡 Technology Features Infotainment Audio System: Typically a premium AM/FM stereo with cassette player, often from Clarion or Alpine, with multiple speakers. Climate Control: Automatic climate control with a digital display and manual override options. Driver Assistance Cruise Control: Standard electronic cruise control. Trip Computer: May have a basic trip computer displaying fuel consumption and range. Connectivity Phone Integration: No integrated Bluetooth or smartphone connectivity;...