Mitsubishi Diamante 1990-2000 Workshop Service Repair Manual

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🏷️ Basic Information Identification Make: Mitsubishi Model: Diamante Model Years Covered: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Generations Covered: 1st Generation (1990-1996), 2nd Generation (1997-2004) - Early Models Codes Chassis Codes: F15A, F17A, F25A, F27A, F31A, F36A 👋 Introduction Market Position Segment: Full-size/mid-size luxury sedan. Competitive Analysis Key Competitors: Toyota Avalon, Lexus ES, Infiniti J30, Buick Park Avenue, Ford Taurus/Mercury Sable (higher trims). Key Features Distinguishing Features: Known for its comfortable ride, spacious interior, advanced features for its era, and a more upscale image compared to mainstream sedans. Offered with powerful V6 engines and available AWD. Manual Value Proposition Value For Diyers: Essential for DIY owners to perform maintenance and repairs, saving significant costs compared to dealership services. Provides clarity on complex procedures and troubleshooting. Value For Professionals: A valuable reference for independent mechanics to quickly access factory specifications, procedures, and wiring diagrams for efficient and accurate repairs. 📋 Manual Details Coverage Areas Primary Coverage: North America, Japan (Domestic Market - JDM) Page Count Estimated Page Count: 1000+ Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, troubleshooting, diagnostics, components (pistons, rings, crankshaft, camshaft, valves, cylinder head, block), timing belt/chain, seals, gaskets. Engine Management: Fuel injection systems (MPI, GDI - if applicable), ignition system, emission control systems, sensors, actuators, ECU diagnostics. Transmission: Automatic transmission (AT) service and repair, manual transmission (MT) service and repair (if applicable), clutch system, torque converter, transmission control unit (TCU). Drivetrain: Front-wheel drive (FWD), All-wheel drive (AWD) system service, differentials, axles, CV joints, driveshafts. Brakes: Hydraulic brake system, disc brakes, drum brakes (if applicable), ABS system, parking brake, brake fluid, bleeding procedures, components. Suspension: Front suspension (MacPherson strut, multi-link), rear suspension (multi-link), shock absorbers, springs, control arms, bushings, alignment procedures. Steering: Power steering system, steering rack, steering column, linkages, troubleshooting. Cooling System: Radiator, water pump, thermostat, hoses, fan, coolant types, capacity, flushing procedures. Fuel System: Fuel tank, fuel pump, fuel lines, fuel filter, fuel injectors, fuel pressure regulation. Electrical System: Battery, charging system (alternator), starting system (starter), lighting system, fuses, relays, wiring diagrams for all circuits. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system service, refrigerant, compressor, evaporator, condenser, blower motor. Chassis Body: Body panel removal/installation, structural components, doors, hood, trunk, bumpers, chassis lubrication. Restraint System: Airbag system components, seatbelts, SRS diagnostics. Interior: Trim panel removal/installation, seats, dashboard, console, carpeting. Procedures Included Maintenance: Scheduled maintenance, fluid changes (oil, coolant, brake, transmission, power steering), filter replacements, spark plug service, belt inspection/replacement. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting charts. Repair: Detailed step-by-step instructions for component removal, repair, and installation across all covered systems. Diagnostics: On-board diagnostics (OBD-I/OBD-II if applicable), sensor testing, actuator testing, electrical circuit testing. Electrical Diagnostics: Fuse and relay testing, wiring continuity checks, component voltage testing, multimeter usage guidance, wiring diagram interpretation. Technical Depth Depth: Comprehensive. Covers everything from basic fluid checks and filter replacements to complete engine and transmission overhauls, including in-depth electrical system diagnostics and bodywork repairs. 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Fully printable without restrictions. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Format) Digital Features Searchability: Likely searchable text within PDF (dependent on original source scan quality). Delivery Delivery Method: Instant PDF download after payment. Requirements Software Required: Adobe Acrobat Reader or compatible PDF viewer. ⚙️ Engine Specifications Primary Engine Engine 1 Variant: 6G72 (3.0L V6 SOHC) Engine 1 Displacement: 2972 cc Engine 1 Horsepower Est: 150 - 170 hp Engine 1 Torque Est: 170 - 185 lb-ft Secondary Engine Engine 2 Variant: 6G74 (3.5L V6 SOHC/DOHC) Engine 2 Displacement: 3497 cc Engine 2 Horsepower Est: 180 - 210 hp (SOHC), 210 - 245 hp (DOHC - later models/JDM) Engine 2 Torque Est: 205 - 230 lb-ft (SOHC), 230 - 250 lb-ft (DOHC) Performance Fuel Type: Unleaded Gasoline Fuel System Fuel Delivery: Multi-Point Fuel Injection (MPI) standard. Some later models or JDM variants may have used Gasoline Direct Injection (GDI) in specific configurations. Components Engine Block Material: Cast Iron Cylinder Head Material: Aluminum Timing Mechanism: Timing Belt (6G72, early 6G74 SOHC) or Timing Chain (later 6G74 DOHC, some variants). 🔧 Transmission Standard Transmission Type Standard: 4-speed Automatic Transmission (F4A51, V4A51) Optional Transmission Type Optional: 5-speed Manual Transmission (e.g., W5M33) was available on some performance trims or JDM models. Features Traction Control System: Available on some models, particularly with AWD. All Wheel Drive: Electronically controlled Active All-Wheel Drive (AWC) system available on select trims and engine configurations. Fluid Specifications Atf Type: Dexron III or equivalent (check specific model year for precise specification, e.g., Diamond ATF SP-III). 📐 Dimensions Exterior Length: Approx. 189.0 - 193.0 inches (depending on generation and specific model) Width: Approx. 70.5 - 71.5 inches Height: Approx....

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Tags: 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Car Cars Diamante Mitsubishi

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Description

🏷️ Basic Information

Identification

Make:

Mitsubishi

Model:

Diamante

Model Years Covered:

1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Generations Covered:

1st Generation (1990-1996), 2nd Generation (1997-2004) - Early Models

Codes

Chassis Codes:

F15A, F17A, F25A, F27A, F31A, F36A

👋 Introduction

Market Position

Segment:

Full-size/mid-size luxury sedan.

Competitive Analysis

Key Competitors:

Toyota Avalon, Lexus ES, Infiniti J30, Buick Park Avenue, Ford Taurus/Mercury Sable (higher trims).

Key Features

Distinguishing Features:

Known for its comfortable ride, spacious interior, advanced features for its era, and a more upscale image compared to mainstream sedans. Offered with powerful V6 engines and available AWD.

Manual Value Proposition

Value For Diyers:

Essential for DIY owners to perform maintenance and repairs, saving significant costs compared to dealership services. Provides clarity on complex procedures and troubleshooting.

Value For Professionals:

A valuable reference for independent mechanics to quickly access factory specifications, procedures, and wiring diagrams for efficient and accurate repairs.

📋 Manual Details

Coverage Areas

Primary Coverage:

North America, Japan (Domestic Market - JDM)

Page Count

Estimated Page Count:

1000+

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine disassembly, assembly, troubleshooting, diagnostics, components (pistons, rings, crankshaft, camshaft, valves, cylinder head, block), timing belt/chain, seals, gaskets.

Engine Management:

Fuel injection systems (MPI, GDI - if applicable), ignition system, emission control systems, sensors, actuators, ECU diagnostics.

Transmission:

Automatic transmission (AT) service and repair, manual transmission (MT) service and repair (if applicable), clutch system, torque converter, transmission control unit (TCU).

Drivetrain:

Front-wheel drive (FWD), All-wheel drive (AWD) system service, differentials, axles, CV joints, driveshafts.

Brakes:

Hydraulic brake system, disc brakes, drum brakes (if applicable), ABS system, parking brake, brake fluid, bleeding procedures, components.

Suspension:

Front suspension (MacPherson strut, multi-link), rear suspension (multi-link), shock absorbers, springs, control arms, bushings, alignment procedures.

Steering:

Power steering system, steering rack, steering column, linkages, troubleshooting.

Cooling System:

Radiator, water pump, thermostat, hoses, fan, coolant types, capacity, flushing procedures.

Fuel System:

Fuel tank, fuel pump, fuel lines, fuel filter, fuel injectors, fuel pressure regulation.

Electrical System:

Battery, charging system (alternator), starting system (starter), lighting system, fuses, relays, wiring diagrams for all circuits.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system service, refrigerant, compressor, evaporator, condenser, blower motor.

Chassis Body:

Body panel removal/installation, structural components, doors, hood, trunk, bumpers, chassis lubrication.

Restraint System:

Airbag system components, seatbelts, SRS diagnostics.

Interior:

Trim panel removal/installation, seats, dashboard, console, carpeting.

Procedures Included

Maintenance:

Scheduled maintenance, fluid changes (oil, coolant, brake, transmission, power steering), filter replacements, spark plug service, belt inspection/replacement.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting charts.

Repair:

Detailed step-by-step instructions for component removal, repair, and installation across all covered systems.

Diagnostics:

On-board diagnostics (OBD-I/OBD-II if applicable), sensor testing, actuator testing, electrical circuit testing.

Electrical Diagnostics:

Fuse and relay testing, wiring continuity checks, component voltage testing, multimeter usage guidance, wiring diagram interpretation.

Technical Depth

Depth:

Comprehensive. Covers everything from basic fluid checks and filter replacements to complete engine and transmission overhauls, including in-depth electrical system diagnostics and bodywork repairs.

📊 Manual Specifications

File Format

Format:

Print Quality

Printability:

Fully printable without restrictions.

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Format)

Digital Features

Searchability:

Likely searchable text within PDF (dependent on original source scan quality).

Delivery

Delivery Method:

Instant PDF download after payment.

Requirements

Software Required:

Adobe Acrobat Reader or compatible PDF viewer.

⚙️ Engine Specifications

Primary Engine

Engine 1 Variant:

6G72 (3.0L V6 SOHC)

Engine 1 Displacement:

2972 cc

Engine 1 Horsepower Est:

150 - 170 hp

Engine 1 Torque Est:

170 - 185 lb-ft

Secondary Engine

Engine 2 Variant:

6G74 (3.5L V6 SOHC/DOHC)

Engine 2 Displacement:

3497 cc

Engine 2 Horsepower Est:

180 - 210 hp (SOHC), 210 - 245 hp (DOHC - later models/JDM)

Engine 2 Torque Est:

205 - 230 lb-ft (SOHC), 230 - 250 lb-ft (DOHC)

Performance

Fuel Type:

Unleaded Gasoline

Fuel System

Fuel Delivery:

Multi-Point Fuel Injection (MPI) standard. Some later models or JDM variants may have used Gasoline Direct Injection (GDI) in specific configurations.

Components

Engine Block Material:

Cast Iron

Cylinder Head Material:

Aluminum

Timing Mechanism:

Timing Belt (6G72, early 6G74 SOHC) or Timing Chain (later 6G74 DOHC, some variants).

🔧 Transmission

Standard

Transmission Type Standard:

4-speed Automatic Transmission (F4A51, V4A51)

Optional

Transmission Type Optional:

5-speed Manual Transmission (e.g., W5M33) was available on some performance trims or JDM models.

Features

Traction Control System:

Available on some models, particularly with AWD.

All Wheel Drive:

Electronically controlled Active All-Wheel Drive (AWC) system available on select trims and engine configurations.

Fluid Specifications

Atf Type:

Dexron III or equivalent (check specific model year for precise specification, e.g., Diamond ATF SP-III).

📐 Dimensions

Exterior

Length:

Approx. 189.0 - 193.0 inches (depending on generation and specific model)

Width:

Approx. 70.5 - 71.5 inches

Height:

Approx. 55.0 - 56.0 inches

Wheelbase

Wheelbase:

Approx. 107.7 inches

Weights

Curb Weight Est:

3400 - 3700 lbs (depending on configuration)

🛡️ Safety Features

Ratings

NHTSA Ratings:

Early models generally had moderate safety ratings; later models improved. Specific ratings vary by year and testing agency. Consult relevant databases for detailed crash test results.

Passive Features

Airbags:

Driver and front passenger airbags standard on most models from early 1990s onwards. Side airbags became optional or standard on later models.

Seatbelts:

3-point front and rear seatbelts. Pretensioners for front seatbelts on many models.

Crumple Zones:

Designed with front and rear crumple zones for impact energy absorption.

Active Features

Anti-lock Braking System (ABS) available/standard on most trims.

💡 Technology Features

Infotainment

Audio System:

Factory premium audio systems with cassette decks, CD players (later models), and multiple speakers. Some models offered Nakamichi or Bose sound systems.

Climate Control:

Automatic climate control with digital displays on higher trims. Manual HVAC on base models.

Driver Assistance

Cruise Control:

Standard on most trims.

Traction Control:

Available on certain models, particularly those with AWD.

Connectivity

Early Telematics:

No advanced connectivity features like Bluetooth or USB ports in the modern sense. Some models might have had early voice recognition or integrated phone options for their time.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type used. Refer to the manual for specific recommendations.

Engine Coolant Flush:

Recommended every 30,000 miles or 2-3 years.

Transmission Fluid Change:

Recommended every 30,000-60,000 miles, especially for automatic transmissions. Consult the manual for specific intervals and fluid type.

Timing Belt Replacement:

Critical for 6G72 and early 6G74 engines. Typically recommended every 60,000-90,000 miles. Failure can cause catastrophic engine damage.

Fluid Specifications

Engine Oil Viscosity:

10W-30 or 5W-30 (depending on climate and specific engine variant). Check manual for exact specifications.

Engine Oil Capacity Est:

4.5 - 5.5 Quarts (with filter)

Coolant Type:

Ethylene Glycol based, typically requiring a 50/50 mix of coolant and distilled water.

Power Steering Fluid:

Typically Dexron II/III or a specific Mitsubishi power steering fluid.

Known Issues

Engine Mounts:

Can degrade over time, leading to increased vibration and harshness.

Automatic Transmission Slipping:

Some transmissions may experience slipping or harsh shifting, often due to wear or fluid issues. Proper maintenance is key.

Suspension Component Wear:

Control arm bushings, ball joints, and tie rod ends can wear, leading to steering looseness and tire wear.

HVAC Blower Motor Failure:

Blower motor resistors or the motors themselves can fail, leading to no airflow or intermittent operation.

Window Regulator Failure:

Power window mechanisms can fail, preventing windows from operating.

📚 Vehicle History

Brand Heritage

Mitsubishi Positioning:

Mitsubishi positioned the Diamante as its flagship sedan, aiming to compete in the premium segment with a focus on technology, comfort, and performance.

Model Evolution

Generation 1 1990-1996:

Launched with distinctive styling, powerful V6 engines, and available AWD. Based on the Mitsubishi Sigma platform.

Generation 2 1997-2004:

Revised styling, more powerful engine options (including the 3.5L V6 DOHC), improved interior amenities. Continued to offer AWD. Production ended for the North American market in 2004.

Production

Manufacturing Locations:

Primarily manufactured in Japan.

Sales Trend:

Sales were moderate, often overshadowed by more established luxury brands. Competed well in terms of features and value but struggled to gain significant market share in the luxury segment.

🏆 Awards & Recognition

Recognitions

Car And Driver Reviews:

Often reviewed by automotive publications like Car and Driver, MotorTrend, typically praising its comfort and value, though sometimes critiquing its handling compared to European rivals.

Industry Awards:

Specific awards are not widely documented for the Diamante, but it was recognized for offering a good balance of luxury, features, and performance for its price point.