🏷️ Basic Information

Make:

Isuzu

Model:

Geminett II

Platform Code:

GMJT

Generation Name:

Second Generation

👋 Introduction

Vehicle Segment:

Compact MPV / Minivan (JDM)

Jdm Focus:

The Isuzu Geminett II was primarily a Japanese Domestic Market (JDM) vehicle, catering to the unique needs and preferences of the Japanese automotive consumer.

Competitors:

Dominated Japanese domestic market (JDM) compact MPV segment. Competed with vehicles like the Nissan Prairie, Toyota Liteace/Townace, Mitsubishi Space Wagon.

Practicality Versatility:

Designed for families, offering flexible seating arrangements, ample interior space for its size, and practicality for daily use. Often featured sliding rear doors.

Value Proposition:

Known for offering a good balance of features, practicality, and affordability within its segment.

📋 Manual Details

Model Years Covered:

1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994

Estimated Pages:

Over 1000 (typical for comprehensive service manuals of this era)

Manual Type:

Factory Service Manual / Repair Manual

Manual Source:

Likely derived from official Isuzu factory service documentation.

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures, component identification, specifications, disassembly, assembly, lubrication, cooling system, fuel system (carburetor/injection), exhaust system, engine management system.

Transmission Drivetrain:

Manual and automatic transmission disassembly, inspection, repair, clutch, driveshafts, differential, axles, transfer case (if applicable).

Suspension Steering:

Front and rear suspension components, shock absorbers, springs, control arms, steering gear, power steering system, wheel alignment specifications.

Brakes:

Hydraulic brake system, disc and drum brake components, master cylinder, wheel cylinders, calipers, brake lines, parking brake system, ABS (if equipped).

Electrical System:

Wiring diagrams, charging system (alternator, battery), starting system, ignition system, lighting, gauges, instrumentation, fuses, relays, power windows, power locks, audio system.

Body Chassis:

Body panel removal and installation, interior trim, exterior trim, doors, windows, bumpers, frame repair (if applicable), corrosion protection.

HVAC:

Heating, ventilation, and air conditioning system diagnosis and repair, refrigerant handling, component replacement.

Fuel System:

Includes troubleshooting and repair for fuel pumps, fuel lines, filters, carburetors or EFI components.

Exhaust System:

Component replacement and repair for exhaust manifolds, pipes, mufflers, and catalytic converters.

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections and adjustments, tire rotation and pressure checks.

Troubleshooting:

Diagnostic charts, symptom-based troubleshooting guides, common fault finding procedures for all major systems.

Repair Rebuild:

Detailed step-by-step instructions for the repair and overhaul of virtually all mechanical and electrical components.

Diagnostics:

Procedures for checking system operation, testing components, and diagnosing faults using factory specifications and test equipment.

Engine Tuning:

Includes procedures for setting idle speed, ignition timing (if adjustable), and carburetor adjustment (where applicable).

Component Testing:

Detailed test procedures for specific components using multimeters, pressure gauges, and vacuum testers.

Wheel Alignment:

Specifications and adjustment procedures for front and rear wheel alignment (camber, caster, toe).

Depth Of Coverage:

Comprehensive: Covers from basic adjustments and maintenance to complete engine and transmission rebuilds. Includes detailed diagnostic procedures and specifications required for professional-level repair.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable if the PDF was created from a digital source or scanned with OCR.

Digital Access:

Instant PDF download for immediate access to repair information.

Printability:

Designed to be printable for workshop use.

Binding:

N/A (Digital PDF)

Paper Quality:

N/A (Digital PDF)

Coverage Scope:

Complete Workshop Manual: Includes all aspects of vehicle repair and maintenance for the specified model years and configurations.

⚙️ Engine Specifications

Engine Code Common:

G180Z (1.8L SOHC Inline-4), C22NE (2.2L SOHC Inline-4 - early models might use similar GM engines due to Isuzu's GM ties).

Engine Type:

Inline-4 Cylinder, SOHC

Displacement 1.8L:

1.8 liters (1809 cc)

Horsepower 1.8L Approx:

Approx. 90-100 PS (66-74 kW) at 5,000-5,500 RPM

Torque 1.8L Approx:

Approx. 140-150 Nm (103-111 lb-ft) at 3,000-3,500 RPM

Displacement 2.2L:

2.2 liters (2198 cc)

Horsepower 2.2L Approx:

Approx. 100-115 PS (74-85 kW) at 5,000-5,200 RPM

Torque 2.2L Approx:

Approx. 170-185 Nm (125-136 lb-ft) at 2,800-3,200 RPM

Fuel Delivery:

Carburetor (early models), Electronic Fuel Injection (EFI) (later models).

Fuel Type:

Unleaded Gasoline

Ignition Type:

Electronic Ignition

🔧 Transmission

Transmission Type Standard:

5-Speed Manual Transmission

Transmission Type Optional:

4-Speed Automatic Transmission

Drivetrain Layout:

Front-Wheel Drive (FWD)

Clutch Type:

Dry, single-plate clutch (for manual transmission)

📐 Dimensions

Length Approx:

4,000 - 4,300 mm (varies by specific configuration)

Width Approx:

1,650 - 1,700 mm

Height Approx:

1,600 - 1,650 mm

Wheelbase Approx:

2,500 - 2,700 mm

Curb Weight Approx:

1,100 - 1,300 kg (depending on configuration)

Seating Capacity:

5-7 passengers (depending on seating configuration)

🛡️ Safety Features

Safety Standards:

Reflects Japanese safety standards of the late 1980s and early 1990s. Likely no official NCAP ratings available for this specific JDM model.

Braking System:

Front disc brakes, rear drum brakes (standard). Some higher trims might have rear discs.

Steering Assist:

Power steering available on most models.

Seat Belts:

Standard seat belts for all occupants.

Body Structure:

Reinforced body structure with safety cage elements.

Child Seat Anchors:

Likely available on later models, consistent with evolving safety standards.

💡 Technology Features

Audio System:

Factory AM/FM radio with cassette player. Speaker configurations varied by trim.

ABS:

Anti-lock Braking System (ABS) was an option on higher trim levels or later models.

Connectivity Features:

Basic; primarily focused on the vehicle's core functions and safety. No modern connectivity features like Bluetooth or USB.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 7,500 km or 6 months, whichever comes first (refer to manual for exact spec).

Spark Plug Replacement:

Every 20,000 - 40,000 km, depending on spark plug type (copper vs. platinum).

Timing Belt Replacement:

Critical: Typically every 80,000 - 100,000 km or 5-7 years. Failure can cause catastrophic engine damage.

Engine Oil Type:

API SG/SH or equivalent, viscosity typically 10W-30 or 10W-40 (check manual for specific engine).

Coolant Type:

Ethylene glycol-based coolant with corrosion inhibitors. Typically a 50/50 mix with distilled water.

Transmission Fluid Manual:

API GL-4 SAE 75W-90 Gear Oil (for manual transmission).

Transmission Fluid Automatic:

Dexron II or equivalent automatic transmission fluid (ATF).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid.

Power Steering Fluid:

DEXRON-II or equivalent automatic transmission fluid (ATF) typically used in power steering systems of this era.

Engine Gaskets:

Valve cover gasket and oil pan gasket can leak with age.

Cooling System:

Radiator hoses and water pump seals can degrade, leading to leaks. Thermostat may stick.

Electrical Connectors:

Corrosion on electrical connectors, especially grounds, can cause intermittent issues.

Transmission Clutch:

Clutch wear is a common maintenance item for manual transmissions.

Body Rust:

As with many vehicles of this era, rust can be a concern, particularly in areas prone to road salt and moisture.

📚 Vehicle History

Isuzu Legacy:

Isuzu has a long history of producing reliable trucks and commercial vehicles, and applied this robust engineering to their passenger cars and MPVs.

Geminett Lineage:

The Geminett was Isuzu's offering in the burgeoning compact MPV segment, succeeding earlier van-based passenger vehicles. The 'II' signifies the second generation, introducing improved styling and features.

Manufacturing Location:

Primarily Japan (Japanese Domestic Market - JDM)

🏆 Awards & Recognition

General Reputation:

While specific 'awards' for this model are rare, Isuzu vehicles of this period were generally recognized for durability and reliability in their respective segments, particularly in commercial applications that influenced their passenger vehicle design.