🏷️ Basic Information

Make:

Jaguar

Model:

XJS

Year:

1990

Market Segment:

Luxury Grand Tourer

👋 Introduction

Positioning:

The 1990 Jaguar XJS was positioned as a refined and luxurious grand tourer, offering a blend of performance, comfort, and distinctive British style, competing with vehicles from marques like Mercedes-Benz and BMW in its segment.

Competitors:

Key competitors included the Mercedes-Benz SL-Class, BMW 8 Series, and the Porsche 928. The XJS differentiated itself with its classic Jaguar styling and emphasis on comfortable, high-speed cruising.

Defining Attributes:

Long, low-slung profile, powerful V12 or inline-six engines, plush interior, and excellent long-distance touring capability.

📋 Manual Details

Manual Type:

Service and Repair Manual

Language:

English

Format:

Digital (PDF - 70+ Separate Sections)

Completeness:

Comprehensive, covering all models

📖 Manual Coverage

Engine Mechanical:

Detailed procedures for all engine variants, including disassembly, assembly, diagnostics, and component replacement.

Fuel System:

Includes fuel injection system diagnostics, pump replacement, injector testing, and fuel line maintenance.

Ignition System:

Covers ignition timing, distributor, coil packs, spark plug replacement, and electronic control unit (ECU) diagnostics.

Cooling System:

Radiator, water pump, thermostat, cooling fan operation, and coolant flush procedures.

Exhaust System:

Catalytic converter, muffler, exhaust manifold, and emissions control system details.

Transmission Automatic:

Diagnostics, fluid changes, seal replacements, and internal component repair for the automatic transmission.

Drivetrain:

Propeller shaft, driveshafts, U-joints, and differential maintenance and repair.

Suspension:

Front and rear suspension component replacement (wishbones, shock absorbers, bushings), alignment procedures, and troubleshooting.

Steering:

Power steering system diagnosis, pump and rack replacement, and steering column adjustments.

Brakes:

Front and rear brake system overhauls, caliper replacement, rotor resurfacing/replacement, brake fluid bleeding, and ABS diagnostics.

Electrical System:

Comprehensive coverage of the vehicle's electrical system, including battery, alternator, starter, lighting, and accessory circuits.

Wiring Schematics:

Detailed, high-resolution wiring diagrams for all vehicle systems, essential for troubleshooting electrical faults.

Bodywork And Interior:

Panel replacement, door mechanism repair, trim removal, seat adjustments, and body panel alignment.

Climate Control:

HVAC system diagnosis, refrigerant charging, blower motor, compressor, and heater core replacement.

Dashboard And Instruments:

Instrument cluster removal and repair, gauge diagnostics, and warning light troubleshooting.

Routine Maintenance:

Oil and filter changes, air filter replacement, spark plug inspection/replacement, coolant checks, and fluid top-offs.

Troubleshooting Guides:

Systematic diagnostic procedures for common and uncommon faults, with symptom-based troubleshooting trees.

Component Replacement:

Step-by-step instructions for replacing individual components within all major systems.

Rebuilding Procedures:

Detailed instructions for the overhaul and rebuilding of major mechanical components like engines and transmissions.

Diagnostic Techniques:

Guidance on using diagnostic tools and techniques specific to the Jaguar XJS of this era.

Depth:

Comprehensive, suitable for professional mechanics and experienced DIY enthusiasts. Covers detailed diagnostics, component-level repair, and complete overhauls.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High resolution, suitable for printing specific pages or the entire document.

Searchable Text:

Likely to contain OCR or be natively text-based for easy searching of keywords and procedures.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Options:

4.0L (3980cc) Jaguar AJ6 Inline-6 and 5.3L (5343cc) Jaguar V12

Inline 6 Horsepower:

Approx. 223 hp @ 4750 rpm (for the 4.0L AJ6)

Inline 6 Torque:

Approx. 277 lb-ft @ 3800 rpm (for the 4.0L AJ6)

V12 Horsepower:

Approx. 263 hp @ 5000 rpm (for the 5.3L V12, depending on market/emission controls)

V12 Torque:

Approx. 304 lb-ft @ 3750 rpm (for the 5.3L V12)

Fuel Delivery:

Bosch L-Jetronic or Lucas electronic fuel injection for both engine variants.

ECU Type:

ECU controlled engine management for ignition and fuel injection.

🔧 Transmission

Transmission Type:

ZF 4HP22 4-speed automatic transmission

Manual Transmission Availability:

Rarely offered as an option, primarily automatic for this model year.

Transmission Control:

Electronic control with 'Sport' and 'Economy' modes on some models.

📐 Dimensions

Length:

Approx. 195.9 inches (4976 mm)

Width:

Approx. 70.2 inches (1783 mm)

Height:

Approx. 49.5 inches (1257 mm)

Curb Weight:

Approx. 4100-4400 lbs (1860-2000 kg) depending on engine and options

🛡️ Safety Features

Crash Test Data:

Specific NHTSA/Euro NCAP ratings for the 1990 model year are scarce; however, features like crumple zones and safety cage were standard for the era.

ABS:

Anti-lock Braking System (ABS) was standard.

Seatbelts:

Three-point front seatbelts, often with automatic tensioners.

Airbags:

Driver-side airbag may have been optional or standard depending on market and specific trim. Passenger airbag was uncommon for this generation.

💡 Technology Features

Audio System:

Premium sound systems common, often featuring brands like Alpine or Clarion. Cassette player was standard.

Climate Control Tech:

Automatic climate control was available, offering temperature regulation.

Cruise Control:

Electronic cruise control was standard or widely available.

Connectivity Features:

Limited by modern standards; primarily focused on audio system and basic vehicle controls.

🔧 Maintenance

Oil Change:

Typically every 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type used.

Transmission Fluid:

Recommended fluid change every 30,000-60,000 miles, though checking the manual for the specific ZF transmission fluid is crucial.

Engine Oil:

API SG or SH, SAE 10W-40 or 20W-50 recommended (refer to manual for precise grade based on climate).

Coolant:

Ethylene glycol-based, 50/50 mix with distilled water. Specific Jaguar coolant recommendation is ideal.

Brake Fluid:

DOT 3 or DOT 4.

Power Steering Fluid:

Typically Dexron II or equivalent ATF.

Electrical Gremlins:

Age-related electrical issues are common; wiring harness degradation, connector corrosion, and faulty relays.

Cooling System:

Potential for radiator leaks, hose deterioration, and water pump failures.

Suspension Bushings:

Wear in rubber bushings leading to handling degradation and knocking noises.

Fuel Injectors:

Clogging or failure of fuel injectors, particularly on higher mileage vehicles.

Rust And Corrosion:

Common areas include wheel arches, sills, and underbody, especially in regions with salt usage.

📚 Vehicle History

Brand Legacy:

Jaguar has a long-standing reputation for producing elegant, high-performance luxury vehicles, building on a legacy of motorsport success and exquisite design.

Production Span:

The Jaguar XJS was produced from 1975 to 1996, with significant updates and engine changes throughout its lifecycle. The 1990 model year falls within the later iterations of the XJS, benefiting from refinements to the original design.

Manufacturing Location:

Coventry, England

🏆 Awards & Recognition

Automotive Awards:

While specific awards for the 1990 model year are not widely publicized, the XJS was generally praised for its styling and luxury over its production run.