🏷️ Basic Information Identification Make: Mitsubishi Model: Sigma Diamante Body Style: Full-size Sedan Generation Generation Name: Third Generation (1990-1996) Codes Chassis Codes: F15A, F17A, F25A, F27A, F31A, F36A Engine Codes: 6G72, 6G73, 6G74 👋 Introduction Market Position Segment: Full-size Luxury Sedan / Executive Car Target Audience: Discerning buyers seeking comfort, performance, and advanced features for their daily commute and long-distance travel. Competitive Analysis Key Competitors: Toyota Camry, Honda Accord, Nissan Maxima, Ford Taurus, Chevrolet Lumina, BMW 3-Series, Mercedes-Benz C-Class (depending on specific market and trim). Key Features Distinguishing Elements: Sophisticated styling, V6 engine options, available all-wheel drive, premium interior appointments, and a focus on a quiet and comfortable ride. Manual Value Proposition: Empowers owners and technicians with the in-depth knowledge required for accurate diagnosis, efficient repair, and proper maintenance, preserving the vehicle's luxury and performance. 📋 Manual Details Coverage Areas Covered Years: 1990, 1991, 1992, 1993, 1994, 1995 Page Count Estimated Page Count: Approximately 1500-2000 pages (typical for comprehensive workshop manuals of this era) Manual Type Type: Workshop Service and Repair Manual Language Language: English Format Format: Digital (PDF) - assumed for modern sales, but original was likely print 📖 Manual Coverage Systems Covered Engine: Engine mechanical (assembly, disassembly, timing, lubrication, cooling), fuel system (injection, pumps, injectors), ignition system, emission control systems. Transmission: Automatic transmission (AT) and Manual transmission (MT) repair, overhaul, torque converter, valve body diagnostics, fluid specifications. Drivetrain: Front-wheel drive (FWD), All-wheel drive (AWD) systems (if applicable), differentials, driveshafts, CV joints, propeller shaft, rear differential (for AWD). Suspension: Front and rear suspension systems, shock absorbers, struts, springs, control arms, bushings, alignment specifications. Brakes: Hydraulic brake system, ABS (Anti-lock Braking System), disc brakes (front and rear), brake pads, rotors, calipers, master cylinder, brake fluid specifications. Steering: Power steering system, steering gear, steering column, tie rods, power steering fluid. Electrical: 12V electrical system, battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting systems, instrument cluster, power accessories. Climate Control: Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant, operation, diagnostics. Body: Body panel removal and installation, doors, hood, trunk, interior trim, glass replacement, door locks, body repair procedures. Safety Systems: Seat belts, airbag system (SRS) components and removal/installation procedures (with strict safety warnings). Procedures Included Maintenance: Routine maintenance procedures: oil changes, filter replacements, spark plug replacement, fluid level checks and top-offs, belt inspections and replacement, tire rotation. Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (OBD-I era), diagnostic connector locations. Repair: Step-by-step repair procedures for all major mechanical and electrical components, including complete engine and transmission overhauls. Overhaul: Detailed instructions for engine and transmission rebuilding, including specifications for clearances, torques, and component wear limits. Installation: Procedures for installing new or replacement parts, including torque specifications and critical alignment requirements. Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to complete engine and transmission rebuilds, electrical system diagnostics, and bodywork. Diagnostic Capability: Advanced: Includes diagnostic charts, trouble codes, and detailed explanations of system operation to facilitate problem-solving. 📊 Manual Specifications File Format Digital Format: PDF (searchable text, bookmark support, printable pages recommended) Print Quality Image Resolution: High resolution for clear diagrams and schematics. Binding Type Original Binding: Perfect bound or coil bound (typical for OEM service manuals) Paper Type Original Paper: Durable, high-quality paper suitable for workshop environments ⚙️ Engine Specifications Primary Engine Engine 1 Name: 6G72 V6 Engine 1 Displacement: 3.0 Liters (2972 cc) Engine 1 Configuration: V6 SOHC (Single Overhead Cam) or DOHC (Double Overhead Cam) Engine 1 Horsepower: Approx. 150-170 HP (SOHC), 195-210 HP (DOHC - ECI Multi) Engine 1 Torque: Approx. 170-190 lb-ft (SOHC), 200-220 lb-ft (DOHC) Optional Engine Engine 2 Name: 6G73 V6 Engine 2 Displacement: 2.5 Liters (2497 cc) Engine 2 Configuration: V6 SOHC Engine 2 Horsepower: Approx. 130-145 HP Engine 2 Torque: Approx. 150-165 lb-ft Engine 3 Name: 6G74 V6 (JDM/specific markets) Engine 3 Displacement: 3.5 Liters (3497 cc) Engine 3 Configuration: V6 DOHC (ECI Multi) Engine 3 Horsepower: Approx. 230-240 HP Engine 3 Torque: Approx. 225-235 lb-ft Performance Fuel Delivery: Multi-point Fuel Injection (MPFI) / ECI Multi Fuel Type: Unleaded Gasoline Ignition System: Electronic Ignition (Distributor-less or Distributor-based depending on year/market) 🔧 Transmission Standard Transmission Type: 4-speed Automatic Transmission (F4A51, V4A51) Optional Transmission Type: 5-speed Manual Transmission (available on some trims/markets) Features AWD System: Electronic All-Wheel Drive (E-AWDi) with viscous coupling center differential on certain models (e.g., GDI Sport) At Features: Sportronic (sequential shifting capability on later models), electronically controlled shifts. 📐 Dimensions Exterior Length: Approx. 4,965 mm (195.5 in) Width: Approx. 1,770 mm (69.7 in) Height: Approx. 1,400 mm (55.1 in) Wheelbase: Approx. 2,750 mm (108.3 in) Weights Curb Weight: Approx. 1,500 - 1,700 kg (3,300 - 3,750 lbs) depending on engine and configuration Gross Vehicle Weight Rating: Typically around 2,000 kg (4,400 lbs) 🛡️ Safety Features Ratings NHTSA Ratings: NHTSA crash test data for this era is limited and varied by...