🏷️ Basic Information Identification Make: Mitsubishi Model: Sigma Generations: Fourth Generation (1990-1996) / Fifth Generation (1996-2000) - Manual covers up to 1997 Production Years Covered: 1991, 1992, 1993, 1994, 1995, 1996, 1997 👋 Introduction Market Position Segment: Mid-size/Full-size luxury sedan (often competing with Japanese and American luxury brands of the era). Competitive Analysis Competitors: Toyota Avalon, Lexus ES, Nissan Maxima, Buick Park Avenue, Ford Taurus SHO. Key Features Brand Offering: Provided a blend of performance, comfort, and value within the luxury sedan segment. Manual Purpose: Designed to equip technicians and owners with the knowledge to maintain, diagnose, and repair the vehicle to factory standards. 📋 Manual Details Coverage Areas Primary Markets: Global (often marketed as Mitsubishi Diamante in some regions) Regional Specifics: General workshop repair; specific regional adaptations might require supplementary documentation. Specific Models Trims: Likely covers various trims and engine options within the 1991-1997 Sigma range. Page Count Estimated Pages: Hundreds to thousands (printable at high quality) Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip (for larger files) 📖 Manual Coverage Systems Covered Engine Service Repair: Detailed procedures for engine disassembly, assembly, diagnosis, and repair. Transmission Service Repair: Covers both manual and automatic transmission service, repair, and overhaul. Brake System: Inspection, maintenance, repair of hydraulic systems, calipers, rotors, and parking brake. Electrical System: Comprehensive coverage of wiring diagrams, component testing, and diagnosis. Suspension: Front and rear suspension components, alignment, and repair procedures. Steering: Power steering system, steering column, and linkage repair and adjustment. Cooling System: Radiator, water pump, thermostat, cooling fan, and coolant service. Fuel System: Includes fuel tank, pump, lines, filter, and injection system components. Fuel Injection: Detailed diagnostics and repair for the Electronic Fuel Injection (EFI) system. Emission System: Covers components like the catalytic converter, O2 sensors, and EVAP system. Heater Air Conditioner: HVAC system diagnosis, refrigerant handling, and component replacement. Chassis Body: Body panel removal/installation, chassis components, and structural repair. Restraint System: Airbag system information (diagnosis and replacement procedures), seat belts. Interior: Trim removal, seat adjustment, dashboard components. Differential Drive: Front and rear differential service and repair. Axle: Front and rear axle shaft service and repair. Periodic Lubrication: Lubrication points and recommended intervals for various components. Engine Control System: Detailed diagnostics for ECU, sensors, and actuators. Power Steering: Service and repair of the power steering pump, rack, and hoses. Lighting System: Headlights, taillights, interior lighting, and related electrical circuits. Exhaust System: Component replacement and diagnosis of exhaust leaks. Wheels Tires: Information on tire rotation, balancing, and wheel specifications. Procedures Included General Maintenance: Routine checks, fluid changes, filter replacements. Troubleshooting: Diagnostic flowcharts and common problem-solving guides. Engine Control System: ECU diagnosis, sensor testing, and actuator control. Wiring Diagrams: Complete electrical system wiring diagrams for all major circuits. Chassis Body Repair: Procedures for frame alignment, panel replacement, and interior/exterior trim. Periodic Lubrication: Detailed instructions on lubrication points and schedules. Engine Tune Up: Spark plug replacement, ignition timing adjustment, and sensor checks. Body And Chassis: Procedures for body panel repair, bumper replacement, and chassis component servicing. Comfort And Convenience: Service for door locks, windows, mirrors, and seat mechanisms. Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIYers. Repair Procedures: Step-by-step repair instructions, including torque specifications, clearances, and assembly sequences. Diagnostic Charts: Troubleshooting flowcharts and symptom-based diagnostics. 📊 Manual Specifications File Format Print Quality: High-quality printable pages Searchability: Likely searchable text within PDF files Binding Type Binding: Digital (Downloadable PDF) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Options Typical: 3.0L V6 (6G72), 3.5L V6 (6G74) - Exact availability varied by market and year. Performance Horsepower Range Typical: Approximately 150-220 hp (depending on engine variant and tune). Torque Range Typical: Approximately 180-230 lb-ft (depending on engine variant and tune). Fuel System Injection Type: Electronic Multi-port Fuel Injection (MPI). Engine Codes Engine Code Examples: 6G72, 6G74 🔧 Transmission Standard Standard Transmission: Usually a 4-speed automatic transmission. Manual transmissions were less common or not available in certain markets/trims. Optional Optional Transmission: Some models may have offered a 5-speed manual transmission. Features Transmission Features: Electronic control, adaptive shifting logic. 📐 Dimensions Exterior Wheelbase Typical: Approx. 107.5 inches (2730 mm) Length Typical: Approx. 190-195 inches (4826-4953 mm) Weights Curb Weight Range: Approx. 3300-3600 lbs (1497-1633 kg) 🛡️ Safety Features Ratings Crash Test Data: Limited publicly available crash test data specifically for the Sigma in this era. Refer to the manual for specific safety system details. Passive Features Airbags: Driver and passenger airbags were becoming standard during this period, likely available on higher trims. Seat Belts: 3-point front and rear seat belts. 💡 Technology Features Infotainment Audio System: Factory AM/FM cassette stereo systems, optional CD players were available. Driver Assistance Cruise Control: Standard on many trims. Comfort Features Climate Control:...