This manual covers the Diamante, specifically the First Generation (JS Series) produced from 1990 to 1995. The Diamante was the flagship sedan during this period, known for its distinctive styling, comfortable interior, and advanced features for its time, including optional ABS and a premium audio system. Positioned as a large sedan, it offered a compelling blend of luxury and performance, often competing with established models in its segment. This comprehensive guide details various engine options, including the 3.0L V6 and potentially a 2.5L V6, along with automatic and optional manual transmissions, providing essential information for owners and technicians alike.
This workshop repair service manual provides extensive coverage for all models, engines, trims, and transmissions of the Diamante JS Series. It details critical maintenance procedures, such as oil changes and timing belt replacements, along with troubleshooting, diagnostic procedures, and in-depth repair instructions for all major systems, including the engine, transmission, brakes, suspension, and electrical systems. With hundreds of pages of factory-level information, including detailed substeps, illustrations, and wiring diagrams, this manual is an indispensable resource for DIY enthusiasts and professional technicians seeking to maintain, diagnose, and repair their Diamante with accuracy and efficiency.
Generation:
First Generation (JS)
Production Years Covered:
1990, 1991, 1992, 1993, 1994, 1995
Target Audience:
DIY Enthusiasts, Professional Technicians, Vehicle Owners
Advantage:
Comprehensive, factory-level information, digital convenience
Completeness:
COMPLETE and INTACT, no missing/corrupt parts or pages
Origin:
Same manual used in local service/repair shops, Original Manufacturer's Manual
Cost Savings:
Enables DIY repairs, saving hundreds to thousands of dollars
Estimated Page Count:
Hundreds of pages (typical for comprehensive workshop manuals)
Type:
Workshop Repair Service Manual
Engine Service Repair:
True
Transmission Service Repair:
True
Periodic Lubrication:
True
Fuel Injection Fuel System:
True
Heater Air Conditioning:
True
Engine Control System:
True
General Maintenance:
True
Diagnostic Procedures:
True
Disassembly Assembly:
True
Cleaning Reinstalling:
True
Notes Cautions Warnings:
True
Numbered Instructions:
True
Illustrations Drawings Photos:
True
Enlarged Insets For Parts:
True
Electrical Service Procedures:
True
Depth:
Professional Technician Level
Printability:
Full Printable
Zoom Functionality:
Zoom IN/OUT Enabled
Binding:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating Systems:
All Versions of Windows & Mac
Engine Variants Covered:
Likely includes 3.0L V6 (6G72 SOHC and DOHC variants) and potentially 2.5L V6 (6A11) for specific markets/trims.
Typical Horsepower Range:
141 hp to 218 hp (depending on engine variant and year)
Typical Torque Range:
170 lb-ft to 214 lb-ft (depending on engine variant and year)
Fuel Delivery:
Electronic Fuel Injection (EFI)
ECU Type:
Engine Control Unit (ECU) / Powertrain Control Module (PCM) dependent on model year and region.
Transmission Types:
Automatic Transmissions (e.g., 4-speed INVECS-II), Manual Transmissions likely optional on some variants.
Optional Transmission Types:
Likely 5-speed manual transmissions on select performance variants.
Transmission Features:
INVECS-II (Intelligent and Innovative Control Transmission) with adaptive shift logic for automatic transmissions.
Wheelbase:
Approx. 107.7 inches (2735 mm)
Overall Length:
Approx. 191.3 inches (4859 mm)
Curb Weight:
Approx. 3400 - 3700 lbs (1542 - 1678 kg)
Passive Safety Features:
Seatbelts, crumple zones, reinforced safety cage.
Active Safety Features:
ABS (Anti-lock Braking System) became more common through the generation.
Airbags:
Driver airbag standard from early years, passenger airbag often optional or standard on higher trims later in the generation.
Audio System:
Factory AM/FM Stereo Cassette, optional CD player. Speaker configurations varied by trim.
Driver Assistance Features:
Cruise control standard on most models. ABS on higher trims or later models.
Original Connectivity:
Limited to analog systems; no modern Bluetooth or USB connectivity.
Oil Change Interval:
Typically every 3,000-5,000 miles or 3-6 months, depending on driving conditions. Refer to manual for specific recommendations.
Timing Belt Replacement:
Critical for V6 engines. Typically recommended every 60,000 to 90,000 miles. Manual will specify exact interval and part numbers.
Engine Oil Type:
Likely 5W-30 or 10W-30 API SH or higher. Manual will specify exact viscosity and API rating.
Coolant Type:
Ethylene Glycol based, typically a 50/50 mix with distilled water. Manual will confirm type (e.g., green coolant) and capacity.
Transmission Fluid Type Automatic:
Likely ATF SP-II or equivalent. Manual will specify exact type and capacity for fluid changes.
Common Wear Items:
CV joints, suspension components (bushings, ball joints), exhaust systems, starter motors, O2 sensors.
Electrical Gremlins:
Can be prone to minor electrical issues over time, especially with window motors, door locks, and sensor failures. Wiring diagrams in manual are crucial.
Brand Focus:
Mitsubishi has a history of diverse vehicle production, including passenger cars, SUVs, and performance vehicles.
Market Segment:
Full-size/Large Sedan, positioned as a premium offering for Mitsubishi.
Design Influence:
Often cited for its distinctive styling and advanced features for its time, particularly the parabolic headlights and flowing lines.
Manufacturing Location:
Primarily Japan.
Contemporary Acclaim:
The Diamante was generally well-received for its styling, comfort, and value upon its release, often praised for punching above its weight in terms of luxury features.
