Jeep Comanche 1990 Service Repair Workshop Manual

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🏷️ Basic Information Identification Make: Jeep Model: Comanche Year: 1990 Body Style: Pickup Truck Codes Chassis Code: XJ 👋 Introduction Market Position Segment: Compact Pickup Truck Target Audience: Jeep enthusiasts,...

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Description

🏷️ Basic Information

Identification

Make:

Model:

Comanche

Year:

Body Style:

Pickup Truck

Codes

Chassis Code:

👋 Introduction

Market Position

Segment:

Compact Pickup Truck

Target Audience:

Jeep enthusiasts, DIY mechanics, professional technicians

Competitive Analysis

Key Competitors:

Ford Ranger, Chevrolet S-10, Toyota Hilux (excluding North America)

Key Features Vehicle

Jeep Heritage:

Built on the robust XJ Cherokee platform, offering legendary Jeep capability

Off Road Prowess:

Renowned for its off-road capabilities, especially with optional Command-Trac 4WD

Versatility:

Combines utility of a pickup with the comfort and handling of an SUV

Manual Value Proposition

Essential Resource:

Indispensable for accurate maintenance, troubleshooting, and repair

📋 Manual Details

Coverage Areas

Primary Coverage:

Full Service and Repair

Geographic Scope:

Global (Mechanic Standard)

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Workshop Manual / Service Repair Manual

Language

Language:

English

Format

Format:

Digital (Likely PDF, Searchable)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete overhaul, diagnosis, repair procedures for all engine variants

Engine Performance:

Tuning, emissions control systems, fuel injection, ignition system diagnostics

Transmission Manual:

Disassembly, assembly, repair, and adjustment for manual transmissions

Transmission Automatic:

Diagnosis, repair, and overhaul procedures for automatic transmissions

Drivetrain 4Wd:

Transfer case operation, front/rear axle service, CV joints, driveshafts

Suspension Front:

Coil spring independent front suspension (IFS) service, alignment, components

Suspension Rear:

Leaf spring solid rear axle service, components

Brakes System:

Disc front, drum rear brake system service, hydraulic system, ABS (if equipped)

Steering System:

Power steering system service, steering gearbox, tie rods

Electrical System:

Wiring diagrams, charging system, starting system, lighting, accessories

Body And Chassis:

Frame repair, body panel replacement, doors, glass, interior trim

HVAC System:

Heating, ventilation, and air conditioning system diagnosis and repair

Procedures Included

Maintenance:

Scheduled maintenance intervals, oil changes, filter replacements, fluid checks

Troubleshooting:

Diagnostic flowcharts and symptom-based troubleshooting for common problems

Repair:

Step-by-step repair instructions for all major components and systems

Overhaul:

Detailed procedures for engine, transmission, and differential overhauls

Diagnostics:

Electrical system diagnostics, engine performance analysis, fuel system testing

Installation:

Instructions for component replacement and accessory installation

Technical Depth

Depth Level:

Comprehensive (from basic maintenance to complete rebuilds)

Diagnostic Capability:

Advanced diagnostic procedures, including electrical testing and component testing

Torque Specifications:

All essential torque specifications for fasteners across all systems

Clearances Tolerances:

Precise specifications for engine and transmission component clearances

📊 Manual Specifications

File Format

File Type:

PDF (Portable Document Format)

Searchability:

Text-searchable for quick information retrieval

Printable:

Printable pages for workshop use

Print Quality

Image Resolution:

High-resolution for clear diagrams and illustrations

Diagrams Illustrations:

Detailed, clear exploded views and schematics

Binding Type

Binding:

N/A (Digital Format)

Paper Type

Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Code 2 5L:

AMC 150

Displacement 2 5L:

2.5 Liters (150.5 cubic inches)

Configuration 2 5L:

Inline 4-Cylinder, Overhead Valve (OHV)

Bore Stroke 2 5L:

3.875 in x 3.25 in (98.4 mm x 82.5 mm)

Compression Ratio 2 5L:

8.8:1

Horsepower 2 5L:

121 hp @ 4800 rpm

Torque 2 5L:

165 lb-ft @ 2400 rpm

Optional Engine

Engine Code 4 0L:

AMC 242

Displacement 4 0L:

4.0 Liters (241.8 cubic inches)

Configuration 4 0L:

Inline 6-Cylinder, Overhead Valve (OHV)

Bore Stroke 4 0L:

3.875 in x 3.414 in (98.4 mm x 86.7 mm)

Compression Ratio 4 0L:

8.8:1

Horsepower 4 0L:

177 hp @ 4700 rpm

Torque 4 0L:

220 lb-ft @ 3200 rpm

Fuel System

Fuel Delivery:

Multi-Point Fuel Injection (MPFI)

Fuel Type:

Unleaded Gasoline (87 Octane Recommended)

Ignition System

Ignition Type:

Distributorless Ignition System (DIS) with Crankshaft Position Sensor

🔧 Transmission

Standard Transmission

Type 2 5L:

Aisin AX-5 5-Speed Manual

Type 4 0L:

Aisin AX-4000 5-Speed Manual (Optional on some trims)

Optional Transmission

Type Automatic:

Chrysler (F) A904 3-Speed Automatic

Type Automatic 4 0L:

Chrysler (A) 42RE 4-Speed Automatic with Overdrive (Optional on 4.0L)

Features

Transfer Case:

Command-Trac NV242 (Full-time 4WD, Part-time 2WD/4WD) or Selec-Trac (if applicable)

Clutch Type:

Dry single plate, hydraulically actuated

Fluid Specifications Manual

Manual Transmission Fluid:

API GL-5, SAE 75W-90 or 80W-90 Gear Oil

Fluid Specifications Automatic

Automatic Transmission Fluid:

Chrysler ATF+3 (or equivalent)

📐 Dimensions

Exterior

Wheelbase Short Bed:

113.0 inches

Wheelbase Long Bed:

125.0 inches

Length Short Bed:

177.4 inches

Length Long Bed:

209.4 inches

Width:

71.2 inches

Height:

66.0 inches

Cargo

Bed Length Short:

6 feet

Bed Length Long:

7 feet

Weights

Curb Weight Approx:

3400 - 3900 lbs (depending on configuration)

Gvwr Approx:

4600 - 5300 lbs

Towing Capacity Max:

Up to 5000 lbs (with proper equipment and engine)

Payload Capacity Max:

Up to 1500 lbs

Suspension

Front Suspension Type:

Independent Front Suspension (IFS) with Coil Springs

Rear Suspension Type:

Solid Rear Axle with Leaf Springs

Wheels Tires

Standard Wheel Size:

15 inch

Standard Tire Size:

P215/75R15 (may vary by trim and configuration)

Bolt Pattern:

5x114.3 mm (5x4.5 inches)

🛡️ Safety Features

Ratings

NHTSA Rollover Resistance:

Not rated or generally considered acceptable for its class (specific 1990 ratings may be scarce)

Active Features

Optional Anti-lock Braking System (ABS) for rear wheels only

Passive Features

Seat Belts:

Front lap and shoulder belts, optional rear seat belts

Airbags:

No airbags equipped in 1990 models

💡 Technology Features

Infotainment

Radio:

AM/FM stereo with optional cassette player, analog tuning

Speakers:

Typically 2 or 4 speakers

Driver Assistance

Cruise Control:

Optional

Features

Gauges:

Basic analog gauges for speedometer, tachometer (optional on some trims), fuel, oil pressure, temperature, voltmeter

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-5,000 miles or 6 months, whichever comes first (synthetic oil may extend)

Engine Oil Filter:

Replace at every oil change

Air Filter Replacement:

Every 15,000-30,000 miles or as needed

Spark Plug Replacement:

Every 30,000-60,000 miles (depending on plug type)

Transmission Fluid Service:

Every 30,000-60,000 miles (automatic transmission)

Fluid Specifications

Engine Oil Specification:

API SG, SAE 10W-30 or 10W-40 (check manual for specific viscosity based on temperature)

Coolant Type:

Ethylene Glycol based, 50/50 mix with distilled water

Brake Fluid:

DOT 3

Power Steering Fluid:

Mopar Power Steering Fluid or Dexron II (verify in manual)

Known Issues

Common Problems Engine:

Cracked cylinder heads on 4.0L (less common in early models), intake manifold gasket leaks, oil leaks

Common Problems Suspension:

Worn ball joints and tie rod ends (especially with off-road use), sagging leaf springs

Common Problems Electrical:

Wiring harness corrosion, failing alternator, starter motor issues, distributor issues (on older setups)

Common Problems Transmission:

Clutch wear (manual), automatic transmission overheating or slipping (worn clutches/bands)

Common Problems Body:

Rust on rocker panels, floor pans, and tailgate

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Extends Jeep's rugged off-road reputation into the compact pickup segment

Model Evolution

Based On:

Jeep Cherokee (XJ) platform, sharing significant components

Introduction Year:

Production End Year:

Production

Manufacturer:

American Motors Corporation (AMC), later Chrysler Corporation

Manufacturing Locations:

Toledo, Ohio, USA

Market Impact:

Provided a unique blend of Jeep capability and utility in a compact pickup

🏆 Awards & Recognition

Recognitions

Off Road Magazine Awards:

Frequently praised in off-road publications for its capability and robustness during its production run

Ratings

Consumer Reports:

Generally rated as average for reliability in its class, with specific issues noted in the manual

Certifications

Emissions Certification:

Compliant with U.S. Federal Emissions Standards for 1990