The Mitsubishi Sigma, a large sedan produced from 1990 to 1995, offers a blend of V6 engine power, refined styling, and a comfortable ride, positioning it as a competitive option in its segment. Built on Mitsubishi's global platform, this model was also known as the Diamante in North America, reflecting its international appeal. Available with 2.5L and 3.0L V6 engines, and either a 4-speed automatic or 5-speed manual transmission, the Sigma provided a range of powertrain options, with some models featuring All-Wheel Drive. Its engineering quality and focus on driver comfort made it a notable entry against contemporaries like the Toyota Camry and Honda Accord. This comprehensive workshop repair and service manual provides in-depth guidance for maintaining and repairing the Mitsubishi Sigma across all its models, engines, trims, and transmission types. Covering critical areas such as engine management, drivetrain, chassis, and electrical systems, the manual includes detailed procedures for maintenance, diagnostics, and repair, along with essential technical specifications and torque values. With hundreds of pages, clear illustrations, and step-by-step instructions, this resource is invaluable for owners, mechanics, and technicians aiming to ensure the longevity and optimal performance of their Sigma. 🏷️ Basic Information Identification Make: Mitsubishi Model: Sigma Model Years Covered: 1990, 1991, 1992, 1993, 1994, 1995 Chassis Code: GD/GK Series (Global Platform) Codes Engine Codes Common: 6G71 (3.0L V6), 6G72 (3.0L V6 MIVEC on later models), 6G73 (2.5L V6 DOHC) Transmission Codes Common: F4A51 (4-speed Automatic), W5MG1 (5-speed Manual), KM150 (5-speed Manual) 👋 Introduction Market Position Segment: Large Sedan/Luxury Sedan Target Audience: Owners seeking to perform self-maintenance and repairs, DIY enthusiasts, independent repair shops Competitive Analysis Competitors Era: Toyota Camry/Avalon, Honda Accord, Nissan Maxima, Ford Taurus, Chevrolet Lumina Key Features Value Proposition: Enables significant cost savings on maintenance and repairs by empowering owners with professional-grade information Ease Of Use: Numbered instructions, clear diagrams, and comprehensive troubleshooting facilitate efficient repairs 📋 Manual Details Coverage Areas Primary Coverage: All models, engines, trims, and transmission types Geographical Coverage: Likely covers global specifications as Sigma was sold under various names (e.g., Diamante in North America) Page Count Estimated Page Count: Hundreds of pages (as stated in product description) Manual Type Type: Workshop Repair and Service Manual Authenticity: Original manufacturer's manual equivalent Language Language: English Format File Format: PDF Download Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine Management: Engine service, repair, fuel injection, fuel system, emission system, engine control system Drivetrain: Transmission service/repair, differential, drive axle Chassis: Brake system, suspension, steering, chassis, body Electrical: Electrical system, wiring diagrams, engine control system Comfort And Convenience: Heater, Air Conditioning, Interior, Restraint System Procedures Included Maintenance: General maintenance, periodic lubrication, fluid checks and changes Diagnostics: Troubleshooting, diagnostic procedures for electrical systems Repair And Rebuild: Detailed substeps for repair procedures, disassembly, assembly, cleaning, and reinstallation Technical Data: Critical specifications, torque values, clearances Technical Depth Depth: Comprehensive; designed for professional technicians, covering detailed diagnostics and repairs Visuals: Detailed illustrations, drawings, photos, enlarged insets for specific parts 📊 Manual Specifications File Format Format: PDF Requirements: Adobe PDF Reader, WinZip Compatibility: All Versions of Windows & Mac Print Quality Printability: Full Printable Zoom Functionality: YES (Zoom IN/OUT) Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type Common: V6 SOHC/DOHC Displacement Common: 2.5L, 3.0L Performance Horsepower Range: Approx. 170-220 hp (depending on specific engine and year) Torque Range: Approx. 200-260 lb-ft (depending on specific engine and year) Fuel System Injection Type: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline Engine Management ECU Coverage: Includes detailed information on Engine Control Unit (ECU) and associated sensors and actuators 🔧 Transmission Standard Transmission Type Standard: 4-speed Automatic Optional Transmission Type Optional: 5-speed Manual Features AWD Availability: Available on some models/trims (often designated 'V6 AWD' or similar) Fluid Specifications Automatic Transmission Fluid Type: Diamond SP-III or equivalent (check specific manual for exact spec) Manual Transmission Fluid Type: GL-4 or GL-5 Gear Oil (viscosity typically 75W-90) 📐 Dimensions Exterior Body Style: 4-door Sedan Weights Curb Weight Range: Approx. 3300 - 3700 lbs (depending on engine and trim) 🛡️ Safety Features Ratings Airbag Availability: Driver's side airbag standard on later models, passenger airbag optional/standard on some trims Active Features ABS Availability: Anti-lock Braking System (ABS) often standard or optional on higher trims Passive Features Seat Belts: Front and rear seat belts Restraint System Coverage: Includes detailed information on the restraint system, potentially including pre-tensioners on later models 💡 Technology Features Infotainment Audio System: Factory premium audio systems with cassette player and optional CD player Driver Assistance Cruise Control: Standard on most models Connectivity Remote Keyless Entry: Optional on certain trims 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,750-5,000 miles or 6 months, whichever comes first (refer to manual for exact spec) Timing Belt Replacement: Crucial for 6G7x engines; generally recommended every 60,000-90,000...