🏷️ Basic Information

Make:

Mitsubishi

Model:

Diamante

Generation Name:

Third Generation

Generation Years:

1997-2004 (JDM/Global), 2001-2004 (North America)

Platform Code:

K80/K90 Series (JDM), JS platform (North America)

👋 Introduction

Segment:

Full-size Luxury Sedan

Target Audience:

Buyers seeking a comfortable, spacious, and well-equipped sedan, often with AWD capability.

Competitors:

Toyota Avalon, Nissan Maxima, Ford Taurus, Buick Park Avenue, Chevrolet Lumina.

Distinguishing Features:

Available V6 engines, optional All-Wheel Drive (AWD), spacious interior, luxurious appointments for its class.

📋 Manual Details

Covered Years:

2001, 2002, 2003, 2004, 2005

Estimated Page Count:

Extensive (typical factory manuals are 1000+ pages)

Type:

Factory Service Repair Manual (Shop Manual)

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine:

Comprehensive engine overhaul, diagnostics, tuning, emissions control, cooling system, lubrication system, fuel delivery, ignition system.

Transmission:

Automatic transmission (likely INVECS-II) repair, maintenance, diagnostics, fluid specifications, torque converter.

Drivetrain:

Front-wheel drive (FWD) and all-wheel drive (AWD) system repair, including CV joints, driveshafts, differential maintenance.

Chassis:

Suspension (front and rear independent), steering system, wheel alignment specifications, chassis lubrication.

Brakes:

Hydraulic brake system repair, ABS diagnostics and repair, brake pad and rotor replacement, brake fluid specifications.

Electrical System:

Starter, alternator, battery, lighting systems, power windows, power locks, mirrors, wipers, horn, fuses, relays.

Body And Interior:

Door panel removal, seat adjustment/removal, dashboard disassembly, interior trim, exterior body panel repair and alignment, glass replacement.

Climate Control:

HVAC system diagnosis, refrigerant handling, blower motor, heater core, A/C compressor, climate control module.

Fuel System:

Fuel pump, fuel injectors, fuel filter replacement, fuel tank service, evaporative emission control (EVAP) system.

Exhaust System:

Exhaust manifold, catalytic converter, muffler, exhaust pipes, oxygen sensors.

Maintenance:

Regular scheduled maintenance, oil changes, filter replacements, spark plug replacement, fluid checks and changes, brake inspections.

Diagnostics:

Component testing, symptom-based troubleshooting, diagnostic trouble codes (DTC) interpretation, wiring diagram analysis.

Repair:

Step-by-step repair procedures for virtually all vehicle systems, from minor adjustments to major component replacement.

Troubleshooting:

Detailed troubleshooting guides for common and uncommon problems, including electrical gremlins and mechanical faults.

Wiring Diagrams:

Complete and detailed electrical wiring diagrams for all vehicle systems, crucial for electrical troubleshooting.

Specifications:

Torque specifications for all fasteners, component clearances, fluid capacities, tire pressures, alignment angles.

Body Repair:

Procedures for body panel alignment, dent repair, rust prevention, and replacement of exterior components like bumpers, fenders, and doors.

Interior Repair:

Detailed instructions for removing and installing interior trim panels, seats, dashboard components, and upholstery.

Emissions Control:

Information on the evaporative emission control (EVAP) system, secondary air injection (if equipped), and oxygen sensor function.

Depth:

Comprehensive. Covers from basic maintenance to complete engine and transmission rebuilds, including advanced diagnostics and electrical troubleshooting.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text (depending on original scan quality).

Printability:

Fully printable, allowing users to print specific pages or the entire manual.

Binding:

N/A (Digital Product)

Paper Type:

N/A (Digital Product)

⚙️ Engine Specifications

Engine Code And Type:

6G72 (3.0L SOHC V6) and 6G74 (3.5L SOHC/DOHC V6 - depending on market and year).

Engine Displacement:

2972 cc (3.0L) and 3497 cc (3.5L)

Horsepower:

Approx. 180-210 hp for 3.0L, 210-240 hp for 3.5L (Varies by year and specific engine variant).

Torque:

Approx. 200-215 lb-ft for 3.0L, 220-250 lb-ft for 3.5L (Varies by year and specific engine variant).

Fuel Delivery:

Multi-point fuel injection (MPI).

Fuel Type:

Unleaded gasoline.

ECU:

Engine Control Unit (ECU) for managing fuel injection, ignition timing, and emissions.

🔧 Transmission

Type:

4-speed automatic (INVECS-II with Sportronic manual shifting mode).

Type:

All-Wheel Drive (AWD) system available on certain trims.

Transmission Control:

Electronic control unit for smooth shifts and adaptive shift patterns.

📐 Dimensions

Wheelbase:

Approx. 110.2 inches (2800 mm)

Length:

Approx. 197.0 inches (5004 mm)

Width:

Approx. 71.7 inches (1821 mm)

Height:

Approx. 56.7 inches (1440 mm)

Curb Weight:

Approx. 3500-3800 lbs (1588-1724 kg) depending on engine and drivetrain.

🛡️ Safety Features

NHTSA Front Impact:

4-star driver, 4-star passenger (for 2003 model, earlier years may vary slightly).

ABS:

Standard Anti-lock Braking System (ABS).

Traction Control:

Available Traction Control System (TCS) on some models.

Airbags:

Dual front airbags, optional side airbags.

Seatbelts:

Three-point seatbelts with pretensioners.

💡 Technology Features

Audio System:

Factory AM/FM/CD player, potentially with premium audio system (e.g., Rockford Fosgate) on higher trims. Cassette player also common.

Climate Control Tech:

Automatic climate control available on some models.

Cruise Control:

Standard cruise control.

Keyless Entry:

Available keyless entry system.

Auxiliary Inputs:

Likely no standard auxiliary or USB inputs; aftermarket solutions may be available.

🔧 Maintenance

Oil Change Interval:

Typically every 3,750 to 7,500 miles (6,000 to 12,000 km) or 6-12 months, depending on driving conditions and oil type used. Consult manual for specifics.

Timing Belt Replacement:

For 6G7 engines, timing belt replacement is critical. Typically recommended every 60,000 to 100,000 miles (96,000 to 160,000 km). Consult manual for exact interval.

Transmission Fluid Change:

Recommended every 30,000 to 50,000 miles (48,000 to 80,000 km). Use only the specified fluid type.

Engine Oil Type:

Refer to manual for specific viscosity grade (e.g., 5W-30, 10W-30) and API service classification. Likely synthetic or blend required for V6.

Coolant Type:

Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Ensure it meets Mitsubishi specifications.

Transmission Fluid Type:

Specific ATF (Automatic Transmission Fluid) required. Refer to manual for exact type (e.g., DiaQueen ATF-SP III).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid.

Common Problems:

Timing belt failure (if not replaced on schedule), transmission issues (especially on higher mileage vehicles), minor electrical gremlins, potential for catalytic converter issues, and coolant leaks from the front timing cover area on V6 engines.

📚 Vehicle History

Brand History Notes:

Mitsubishi has a long history of producing diverse vehicles, from compact cars to SUVs and performance vehicles. The Diamante was a flagship sedan aimed at competing in the premium segment.

Third Gen Facelift:

The 2001 model year introduced a significant facelift for the third generation, with revised styling, updated interior features, and often new technology.

North American Market Introduction:

The Diamante was sold in North America from 1991, with the third generation arriving for the 1997 model year. The specific years covered by this manual (2001-2005) represent the later part of its North American lifecycle.

Production Plant:

Primarily manufactured in Japan.

🏆 Awards & Recognition

Previous Generation Awards:

First generation Diamante received positive reviews for comfort and value, sometimes appearing on 'best buy' lists. Third generation continued this trend, though market competition intensified.