Engine Service Repair:
Comprehensive coverage including diagnostics, overhaul, component testing, and repair for all engine variants.
Transmission Service Repair:
Detailed procedures for automatic and manual transmissions (if applicable), including overhaul, diagnostics, and fluid management.
Brake System:
Covers ABS, disc/drum components, hydraulic systems, and related diagnostics.
Wiring Diagrams:
Detailed electrical system wiring diagrams, crucial for diagnosing electrical faults.
Electrical System:
Comprehensive diagnostics and repair procedures for all electrical components and circuits.
Suspension:
Front and rear suspension diagnostics, repair, alignment specifications, and component replacement.
Steering:
Power steering system, steering column, and linkage diagnostics and repair.
Cooling System:
Radiator, water pump, thermostat, hoses, and fan diagnostics and repair, including coolant specifications.
Fuel Injection Fuel System:
Fuel pump, injectors, pressure regulator, fuel lines, and EFI system diagnostics.
Emission System:
Catalytic converter, EGR, O2 sensors, and related emission control components and diagnostics.
Heater Air Conditional:
HVAC system diagnostics, refrigerant handling, component repair, and climate control troubleshooting.
Engine Control System:
ECU/ECM diagnostics, sensor testing, and powertrain control module information.
Chassis Body:
Frame, body panels, doors, hinges, latches, and associated hardware repair.
Restraint System:
Airbag system diagnostics, SRS components, and seatbelt mechanisms.
Interior:
Trim removal, seat adjustment, dashboard components, and interior fittings.
Differential Drive:
Front and rear differential service, lubrication, and repair (for AWD models, if applicable).
Axle:
Front and rear axle shaft service, CV joints, and wheel hub components.
General Maintenance:
Routine checks, fluid level adjustments, filter replacements, and basic upkeep.
Periodic Lubrication:
Lubrication points, schedules, and lubricant specifications for various chassis components.
Troubleshooting:
Advanced troubleshooting guide to diagnose and resolve common and complex issues.
Repair Procedures:
Detailed step-by-step repair instructions for virtually all vehicle components.
Rebuild Refurbish Restore:
Guidance for complete vehicle restoration and major component rebuilding.
Diagnostics:
Diagnostic trouble codes (DTCs) and procedures for various electronic and mechanical systems.
Technical Depth:
Covers everything from fundamental maintenance to in-depth engine and transmission overhauls, comparable to what factory-trained technicians use.
Print Quality:
High resolution, allowing for clear printing of all pages and diagrams.
Searchability:
Searchable PDF format for quick information retrieval.
Printability:
Fully printable, with options to print individual pages, chapters, or the entire manual.
Content Authenticity:
Actual Genuine Factory Service Manuals, not third-party reproductions.
Compatibility:
Compatible with all PC-based Windows operating systems and Mac.
Delivery Method:
Instant download link provided on the checkout page after payment.
Required Software:
Adobe PDF Reader.
Oil Change Interval:
Typically every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions and oil type. The manual provides precise intervals and oil specifications.
Spark Plug Replacement:
Intervals vary by spark plug type (copper, platinum, iridium), typically ranging from 30,000 to 100,000 miles. The manual will specify the correct type and interval.
Timing Belt Replacement:
Crucial for these V6 engines. Intervals are typically around 60,000-90,000 miles (96,000-144,000 km) or 5-7 years. Failure can cause catastrophic engine damage. The manual will detail the procedure and interval.
Engine Oil Type:
Likely API SG or SH, with viscosity grades such as 5W-30 or 10W-30. The manual will list the exact specification and capacity.
Coolant Type:
Typically a phosphate-treated ethylene glycol coolant. The manual will specify the correct type and mixture ratio.
Transmission Fluid Type:
For automatic transmissions, likely a DEXRON-III or equivalent ATF. Manual transmissions would require specific gear oil. The manual will specify exact types and capacities.
Common Problems:
Potential issues common to vehicles of this era and platform can include: timing belt wear (critical), valve stem seals (oil consumption), catalytic converter failure, electrical component failures (especially sensors, window regulators, and climate control), and suspension wear (bushings, ball joints).
Brand Reputation:
Mitsubishi, at this time, was known for producing reliable vehicles with a focus on value and often interesting technology, though brand perception was building in the luxury/performance segments.
Model Lineage:
The Sigma nameplate had varying usage globally. In many markets, this model was known as the Mitsubishi Diamante, which itself was developed on a platform shared with Mitsubishi's premium offerings and aimed at competing with established luxury brands.
Manufacturing Location:
Primarily manufactured in Japan.
Production Period:
Second generation Diamante/Sigma produced from 1990-1996 in Japan, with export models extending into 1997 for the 1997 model year. This manual specifically covers the latter part of this production run.
