Mitsubishi Sigma 1991-1996 Workshop Service Repair Manual

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类型: Car

斯库: 157111

标签: 1991 1992 1993 1994 1995 1996 Car Cars Mitsubishi Sigma

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Description

The Mitsubishi Sigma, produced between 1991 and 1996, offered a compelling blend of comfort, style, and performance in the competitive mid-size sedan and coupe market. Built on the reputable Diamante platform, the Sigma was engineered with a focus on reliability and provided a luxurious experience for its era, often featuring powerful V6 engines and available all-wheel drive. Its design and features aimed to challenge established competitors, positioning it as a sophisticated choice for discerning drivers. This comprehensive Workshop Service Repair Manual provides essential information for the maintenance and repair of the Mitsubishi Sigma models from 1991 through 1996. Covering a vast array of systems including engine mechanicals, fuel, cooling, lubrication, ignition, transmissions, drivetrain, suspension, steering, brakes, and electrical systems, this manual offers detailed procedures, diagnostic guidance, and technical specifications. It is an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their vehicle.

🏷️ Basic Information

Identification

Make:

Mitsubishi

Model:

Sigma

Generation:

GD/GY (Sigma)

Codes

Chassis Codes:

GD, GY

👋 Introduction

Market Position

Market Position:

The Mitsubishi Sigma (part of the Diamante family globally) was positioned as a comfortable and stylish mid-size sedan/coupe, offering a blend of performance and luxury for its era, competing against established players in the sedan market.

Competitive Analysis

Competitors:

Competed with vehicles like the Toyota Camry, Honda Accord, Nissan Maxima, Ford Taurus, and Chevrolet Lumina.

Key Features

Key Features:

Available in sedan and coupe body styles, powerful V6 engines, front-wheel or optional all-wheel drive, luxurious interiors for its time, advanced technology for the era (e.g., optional active-ECS suspension).

📋 Manual Details

Coverage Areas

Covered Years:

1991, 1992, 1993, 1994, 1995, 1996

Page Count

Total Pages:

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

File Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine assembly, disassembly, inspection, repair, timing belt, cylinder head, piston, crankshaft, connecting rods, oil pump, oil cooler.

Engine Fuel System:

Fuel injection system, fuel pump, injectors, fuel pressure regulator, throttle body, emissions control.

Engine Cooling System:

Radiator, water pump, thermostat, cooling fan, hoses, coolant specifications.

Engine Lubrication System:

Oil pan, oil pump, oil filter, oil specifications, oil pressure testing.

Ignition System:

Spark plugs, ignition coils, distributor (if applicable), ignition timing, ignition control module.

Transmission Manual:

Clutch system, manual transmission assembly/disassembly, gear ratios, clutch fluid, shift linkage.

Transmission Automatic:

Automatic transmission assembly/disassembly, torque converter, valve body, transmission fluid, transmission control module (TCM).

Drivetrain:

Driveshafts, CV joints, differential, wheel bearings, rear axle components.

Suspension System:

Front suspension components (struts, control arms, ball joints), rear suspension components (shocks, trailing arms, bushings), alignment specifications.

Steering System:

Power steering pump, steering rack/gearbox, steering column, tie rods, steering fluid.

Brake System:

Front/rear brake calipers, brake pads, brake discs/rotors, brake lines, master cylinder, ABS system (if equipped), brake fluid specifications.

Electrical System:

Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting system, horn, wipers.

Body Exterior:

Body panel removal/installation, doors, hood, trunk, bumpers, glass replacement, weather stripping.

Body Interior:

Dashboard, seats, door panels, headliner, trim pieces, carpeting.

HVAC System:

Air conditioning system, heater core, blower motor, climate control panel, refrigerant types.

Restraint Systems:

Airbag system (if equipped), seat belts, pre-tensioners.

Diagnostics Troubleshooting:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, common fault diagnosis.

Procedures Included

Maintenance:

Routine checks, fluid changes (oil, coolant, brake, transmission, power steering), filter replacements, spark plug replacement, belt inspections/replacement.

Repair:

Component removal, installation, disassembly, assembly, and adjustment for all major systems.

Adjustments:

Engine idle speed, ignition timing, clutch pedal free play, brake pedal height, wheel alignment.

Installation:

Installation procedures for major components and accessories.

Removal:

Removal procedures for all vehicle components.

Specifications:

Torque values, fluid capacities, clearances, wear limits, electrical specifications.

Wiring Diagrams:

Comprehensive electrical wiring schematics for all vehicle systems.

Technical Depth

Depth:

Comprehensive, step-by-step procedures with detailed explanations, pictorial diagrams, exploded views, and photographs. Covers everything from basic maintenance to complete rebuilds and advanced diagnostics.

📊 Manual Specifications

File Format

File Format Details:

PDF, searchable text, printable pages.

Print Quality

Print Quality:

High-resolution, printable pages suitable for home or professional printing.

Binding Type

Binding Type:

Digital (PDF - Instant Download)

Paper Type

Paper Type:

Not applicable (digital format)

Compatibility

Os Compatibility:

Windows, Mac, Linux OS.

Requirements

Software Requirement:

Adobe Reader (or compatible PDF viewer).

⚙️ Engine Specifications

Primary Engine

Engine Options:

Primarily featured V6 engines. Common configurations included the 3.0L 6G72 SOHC V6 and potentially a 24-valve DOHC version (6G72 DOHC).

Performance

Horsepower Range:

Typically ranged from approximately 140 hp to over 200 hp depending on the specific engine variant and market.

Torque Range:

Torque figures varied, generally in the 170-200 lb-ft range for the V6 engines.

Fuel System

Fuel Delivery:

Multi-point fuel injection (MPI) or Electronic Fuel Injection (EFI).

Engine Code Examples

Engine Codes:

🔧 Transmission

Standard

Standard Transmission:

Typically a 4-speed automatic transmission was standard on most models.

Optional

Optional Transmission:

A 5-speed manual transmission was likely an option on certain trims or performance-oriented models.

Features

Drivetrain Options:

Front-wheel drive (FWD) and All-wheel drive (AWD - known as 'Full-time 4WD' in some Mitsubishi nomenclature).

📐 Dimensions

Exterior

Wheelbase Sedan:

Approx. 106.3 inches (2700 mm)

Wheelbase Coupe:

Approx. 104.5 inches (2654 mm)

Weights

Curb Weight Range:

Approximately 3300 - 3600 lbs (1500 - 1630 kg), varying by body style and drivetrain.

🛡️ Safety Features

Ratings

Safety Ratings:

Safety ratings from the era varied, with airbags becoming more common but ABS not always standard. Specific NHTSA/IIHS ratings for these exact years and models may be scarce.

Active Features

Active Safety Features:

Anti-lock Braking System (ABS) was often optional. Traction control may have been available on higher trims or AWD models.

Passive Features

Passive Safety Features:

Driver and passenger front airbags (often optional on lower trims), three-point seat belts with pretensioners, reinforced body structure.

💡 Technology Features

Infotainment

Infotainment Features:

Basic AM/FM stereo with cassette player, optional CD player, manual or power climate control. Features were typical for the early to mid-1990s.

Driver Assistance

Driver Assistance Features:

Limited by modern standards. ABS and traction control (on some models) were the primary electronic aids.

Connectivity

Connectivity Features:

None by modern standards (no Bluetooth, USB, or smartphone integration).

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 3,000-5,000 miles (5,000-8,000 km) or 6 months, depending on driving conditions and oil type specified in the manual.

Timing Belt Replacement:

Crucial interval for the 6G72 engine, often recommended around 60,000-90,000 miles (96,000-145,000 km) or 5-7 years. Referencing the manual is essential.

Coolant Replacement:

Generally every 2-4 years or 30,000-50,000 miles (48,000-80,000 km).

Fluid Specifications

Engine Oil Type:

API SG or SH, SAE 5W-30 or 10W-30 typically recommended, depending on climate. Consult the manual for precise viscosity.

Engine Oil Capacity:

Approximately 4.5 - 5.0 US quarts (4.3 - 4.7 liters) with filter change.

Transmission Fluid Type Auto:

Mitsubishi DiaQueen ATF-SPII or equivalent Dexron-II/III compatible fluid.

Transmission Fluid Type Manual:

API GL-4 or GL-5 gear oil, SAE 75W-90.

Power Steering Fluid:

ATF Dexron-II/III compatible fluid.

Brake Fluid Type:

DOT 3 or DOT 4.

Known Issues

Common Issues:

Timing belt failure (due to lack of timely replacement), potential head gasket leaks, automatic transmission issues (especially with age), power window regulator failures, suspension component wear (bushings, ball joints), exhaust system corrosion.

📚 Vehicle History

Brand Heritage

Brand Heritage:

Mitsubishi has a long history in automotive manufacturing, known for reliable and sometimes technologically advanced vehicles. The Sigma represents their foray into the competitive mid-size sedan market.

Model Evolution

Model Evolution:

The Sigma was part of the Mitsubishi Diamante platform. This generation (GD/GY) followed earlier iterations and saw updates in styling and technology through its production run. It was succeeded by other models in Mitsubishi's lineup.

Production

Production Period:

1991-1996

Manufacturing Locations:

Primarily manufactured in Japan.

🏆 Awards & Recognition

Recognitions

Awards Recognitions:

While specific awards for the Sigma model might be hard to pinpoint, the Diamante platform it was based on received positive reviews for its comfort and refinement in automotive publications of the time. It was often praised for punching above its weight in terms of luxury appointments.