Jeep Cherokee YJ XJ 1990 Full Service Repair Manual

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🏷️ Basic Information Identification Make: Jeep Model: Cherokee Chassis Code: YJ / XJ Model Year: 1990 Codes Vin Code Engine: H (4.0L High Output) / E (2.5L) 👋 Introduction Market...

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标签: 1990 Car Cars Cherokee XJ Cherokee YJ Jeep Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

Cherokee

Chassis Code:

YJ / XJ

Model Year:

Codes

Vin Code Engine:

H (4.0L High Output) / E (2.5L)

👋 Introduction

Market Position

Market Segment:

Compact SUV / Off-road Vehicle

Target Audience:

Jeep Cherokee YJ and XJ owners, DIY mechanics, professional repair shops

Competitive Analysis

Competitors 1990:

Ford Bronco II, Chevrolet S-10 Blazer, Nissan Pathfinder, Toyota 4Runner

Key Features

Vehicle Philosophy:

Rugged, capable off-road vehicle with a focus on utility and durability

Manual Value:

Essential for maintaining and repairing these iconic Jeeps, providing cost savings and in-depth knowledge

📋 Manual Details

Coverage Areas

Coverage:

Full Service, Repair, Maintenance, Rebuild, Refurbishment, Restoration

Page Count

Pages:

Extensive (Specific number not provided in product data, but implied to be very comprehensive)

Manual Type

Type:

Full Service Repair Manual

Language

Language:

English

Format

Format:

Likely digital (PDF) or printed book based on typical sales, described as 'very detailed'

📖 Manual Coverage

Systems Covered

Engine Systems:

Engine mechanical, fuel system (EFI), ignition system, cooling system, exhaust system, lubrication system

Drivetrain Systems:

Manual transmission, automatic transmission, transfer case, drive shafts, axles, differentials, hubs

Suspension Steering:

Front suspension (leaf spring YJ, coil spring XJ), rear suspension (leaf spring), steering system (power steering components), wheel alignment

Braking Systems:

Front disc brakes, rear drum brakes, parking brake, hydraulic system, ABS (if equipped)

Electrical Systems:

Battery, charging system, starting system, lighting, gauges, instrument cluster, body electrical, wiring diagrams, fuses, relays, ECU

Body Chassis:

Body panels, doors, windows, interior trim, chassis frame, bumper systems

HVAC:

Heating, ventilation, and air conditioning (HVAC) system

Procedures Included

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, lubrication

Repair Rebuild:

Engine repair, transmission overhaul, suspension component replacement, brake service, electrical troubleshooting, drivetrain component repair

Troubleshooting:

Diagnostic procedures for common and uncommon issues, fault code interpretation (OBD-I)

Diagnostics:

Component testing, electrical circuit diagnosis, mechanical system diagnosis

Technical Depth

Depth:

Comprehensive, covering basic to advanced repair and overhaul procedures

Detail Level:

Includes step-by-step instructions, torque specifications, diagnostic flowcharts, and wiring diagrams

📊 Manual Specifications

File Format

Digital Format:

Likely PDF, with searchable text and high-resolution diagrams

Print Quality

Print Quality:

Professional quality, with clear diagrams and readable text (if printed version)

Binding Type

Binding:

Likely perfect bound or comb-bound for printed versions, for durability in workshop environments

Paper Type

Paper Type:

Durable paper stock suitable for workshop use (if printed version)

⚙️ Engine Specifications

Primary Engine

Engine 1:

2.5L Inline-4 (AMC 150)

Engine 2:

4.0L Inline-6 (AMC 242 High Output)

Performance 2 5L

Displacement 2 5L:

2.5 Liters / 150.7 cubic inches

Horsepower 2 5L:

Approx. 130-140 hp (Varies slightly by year/tuning)

Torque 2 5L:

Approx. 180-190 lb-ft

Performance 4 0L

Displacement 4 0L:

4.0 Liters / 242 cubic inches

Horsepower 4 0L:

Approx. 177-182 hp

Torque 4 0L:

Approx. 220-225 lb-ft

Fuel System

Fuel Delivery:

Electronic Fuel Injection (EFI) - Multi-point or Single-point depending on engine variant and year

Fuel Type:

Unleaded Gasoline

Ignition System:

Distributorless Ignition System (DIS) or Distributor-based ignition system

🔧 Transmission

Standard

Transmission Standard Yj:

5-speed manual (AX-5)

Transmission Standard Xj:

5-speed manual (AX-5) or 5-speed manual (AX-15 with 4.0L)

Optional

Transmission Automatic:

3-speed automatic (727 Torqueflite) or 4-speed automatic (AW-4)

Features

Transfer Case:

New Process (NP) 231 Command-Trac (Part-time 2WD/4WD) or NP207

Transmission Fluid 4 Spd Auto:

ATF+4 (Recommended) or Mopar Dexron III/Mercon (Check manual for exact spec)

Transmission Fluid Manual:

GL-3 or GL-4 gear oil (Specific viscosity to be confirmed in manual)

📐 Dimensions

Exterior Yj

Wheelbase Yj:

93.4 inches

Exterior Xj

Wheelbase Xj:

101.4 inches

Exterior

Length:

YJ: ~157.0 inches, XJ: ~167.5 inches

Width:

~69.0 - 70.0 inches

Height:

~63.0 - 65.0 inches

Weights

Curb Weight:

Approx. 3,000 - 3,500 lbs (Varies by model and options)

Towing Capacity:

Up to 2,000 - 3,500 lbs (Varies by engine and configuration)

🛡️ Safety Features

Ratings

NHTSA Rating 1990:

Specific ratings not readily available for this model year, but generally considered robust for its class.

Active Features

Optional on some models, typically rear-wheel ABS

Passive Features

Seat Belts:

Front shoulder belts, rear lap belts

Airbags:

Not standard in 1990 model year

Rollover Protection:

Roll bar integrated into the structure

💡 Technology Features

Infotainment

Audio System:

AM/FM stereo, cassette player (optional CD player introduced later in generation).

Driver Assistance

Cruise Control:

Optional

Four Wheel Drive System:

Part-time 4WD (Command-Trac) with manual or automatic (Selec-Trac) transfer case options on some models.

Connectivity

OBD System:

OBD-I (On-Board Diagnostics I) - Requires specific diagnostic tools or methods for fault code retrieval.

🔧 Maintenance

Service Intervals Oil Filter

Oil Filter Change:

Every 3,000 - 5,000 miles or 6 months (Consult manual for specific engine)

Engine Oil Change:

Every 3,000 - 5,000 miles or 6 months (Consult manual for specific engine)

Service Intervals Trans Axle

Transmission Fluid Change Auto:

Every 30,000 - 50,000 miles

Transmission Fluid Change Manual:

Every 30,000 - 60,000 miles

Transfer Case Fluid Change:

Every 30,000 - 50,000 miles

Axle Differential Fluid Change:

Every 30,000 - 50,000 miles

Fluid Specifications Engine Oil

Engine Oil 4 0L:

10W-30 or 10W-40 (API SG or higher, consult manual for exact spec and viscosity).

Engine Oil 2 5L:

5W-30 or 10W-30 (API SG or higher, consult manual for exact spec and viscosity).

Fluid Specifications Coolant

Coolant Type:

Ethylene Glycol based antifreeze with corrosion inhibitors (Green).

Coolant Capacity:

Approx. 9-11 quarts (Consult manual for exact capacity).

Known Issues

Common Issues 4 0L:

Head gasket failures (later years), cracked cylinder heads (less common in '90), oil filter adapter leaks, CPS sensor issues.

Common Issues Yj:

Leaf spring wear/breakage, rust (body and frame), clutch issues (manual), speedometer gear wear.

Common Issues Xj:

Rust, heater core leaks, dashboard cracking, transfer case chain stretch, front axle U-joint wear.

Common Issues Electrical:

Wire harness chafing, ground point corrosion, vacuum line cracking.

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Jeep's long history of producing rugged, go-anywhere vehicles, originating from military applications.

Model Evolution Yj

Yj Generation:

Second generation (1987-1995). Notable for its leaf-spring suspension, squared-off styling, and round headlights.

Model Evolution Xj

Xj Generation:

First generation (1984-2001). Pioneered the compact SUV segment with its unibody construction, coil-sprung front suspension, and distinctive styling.

Model Evolution 1990 Updates

1990 Updates:

Introduction of optional ABS, revised interior ergonomics, potential engine updates (e.g., 4.0L H.O. refinements).

Production

Manufacturer:

American Motors Corporation (AMC) initially, then Chrysler Corporation after 1987 acquisition.

Manufacturing Location:

Toledo, Ohio, USA

🏆 Awards & Recognition

Recognitions

Off Road Capability Recognition:

Consistently recognized as one of the most capable off-road vehicles in its class, earning accolades from off-road publications and enthusiasts.

Compact SUV Pioneer:

The XJ is widely credited with defining the compact SUV segment.