🏷️ 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 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 ABS: 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...