Vehicle Class:
Compact SUV (Sport Utility Vehicle)
Target Demographic:
Individuals seeking a capable, off-road oriented, and durable SUV for daily driving and recreational use.
Key Competitors:
Toyota 4Runner, Ford Explorer, Nissan Pathfinder, Chevrolet Blazer.
Vehicle Strengths:
Renowned for its robust unibody construction (Uniframe), strong off-road capability, legendary 4.0L inline-six engine, and long-term durability.
Manual Value Proposition:
Empowers owners to perform maintenance and repairs, saving money and ensuring the longevity of a classic Jeep model.
Engine Service:
Detailed diagnostics, repair, and overhaul procedures for the 4.0L (242 ci) I6 engine, including timing, valve train, fuel injection, ignition, cooling, and exhaust.
Transmission Service:
Covers the NV3550 5-speed manual transmission and the 42RE 4-speed automatic transmission, including overhaul, adjustment, and fluid specifications.
Driveline Service:
Front and rear differential service, axle shafts, U-joints, CV joints, transfer case (NP231 Command-Trac) maintenance and repair.
Brake System Service:
Front and rear brake system diagnostics, repair, fluid specifications, ABS system troubleshooting, and component replacement.
Suspension Steering:
Front and rear suspension components, steering system diagnostics, power steering pump, steering gear, and alignment specifications.
Cooling System:
Radiator, water pump, thermostat, fan clutch, coolant specifications, and pressure testing procedures.
Electrical Battery Charging:
Battery service, alternator testing and replacement, starter motor diagnostics, wiring diagrams, and fuse/relay identification.
Ignition System:
Ignition coil, spark plugs, distributor (if applicable for earlier models, though 2001 is typically coil-on-plug or distributorless), timing adjustments.
Instrument Panel Gauges:
Diagnostics and repair of gauges, warning lights, and instrument cluster components.
Audio System:
Troubleshooting and repair of the factory radio, speakers, and antenna system.
Horn System:
Horn circuit diagnostics and repair.
Cruise Control:
Vehicle speed control system diagnostics and repair.
Electrically Heated Systems:
Troubleshooting of electrically heated components such as rear defogger or heated mirrors.
Engine Intake Exhaust:
Engine performance tuning, intake manifold gaskets, exhaust system components, catalytic converter.
Fuel System:
Fuel pump, fuel injectors, fuel filter, fuel pressure regulator, evaporative emission control (EVAP) system.
Tires Wheels:
Tire pressure monitoring, wheel mounting, lug nut torque specifications, and wheel bearing service.
HVAC System:
Air conditioning system service, heating system operation, blower motor, heater core, evaporator core, refrigerant charging.
Emission Control:
On-Board Diagnostics (OBD-II) system, catalytic converter, EGR system, secondary air injection system, emission control components.
Maintenance Procedures:
Routine maintenance tasks such as oil changes, filter replacements, fluid checks and flushes, lubrication, and general inspection.
Diagnostic Procedures:
Step-by-step diagnostic guides and troubleshooting charts for various systems, including fault code retrieval and interpretation.
Repair Procedures:
Detailed instructions for component removal, installation, and adjustment, covering everything from minor repairs to major overhauls.
Troubleshooting Guides:
Systematic approaches to identifying and resolving common and uncommon vehicle problems.
Depth Of Coverage:
Comprehensive, from basic DIY maintenance to complex engine and transmission rebuilds, suitable for professional mechanics and experienced DIYers.
Engine Type:
Inline 6-Cylinder, Overhead Valve (OHV)
Engine Displacement:
4.0 Liters (242 cubic inches)
Engine Bore X Stroke:
3.875 inches x 3.414 inches (98.4 mm x 86.7 mm)
Engine Compression Ratio:
8.8:1
Engine Horsepower:
190 hp @ 4600 rpm (approximate)
Engine Torque:
225 lb-ft @ 3200 rpm (approximate)
Fuel Induction:
Sequential Electronic Fuel Injection (SEFI)
Fuel Type:
Unleaded gasoline, 87 octane (89 recommended for optimal performance)
Cooling System Type:
Pressurized liquid cooling system
Coolant Type:
Mopar Antifreeze/Coolant (API Specification: Chrysler MS-9769) or equivalent (50/50 mixture with distilled water)
Engine Oil Type:
SAE 10W-30 API Service SG or higher
Engine Oil Capacity:
6 U.S. Quarts (5.7 Liters) with filter change
Standard Transmission:
NV3550 5-Speed Manual Transmission
Optional Transmission:
42RE 4-Speed Automatic Transmission
Manual Transmission Fluid
Manual Transmission Fluid Spec:
MS-9224 (Manual Transmission Fluid)
Automatic Transmission Fluid
Automatic Transmission Fluid Spec:
ATF+4 (Chrysler Material Standard MS-9602)
Transfer Case Model:
New Process (NP) 231 (Command-Trac 4WD System)
Transfer Case Fluid Spec:
MS-9224 (Manual Transmission Fluid, or Dexron III/Mercon equivalent)
Oil Change Interval:
Every 3,000 - 6,000 miles or 6 months (whichever comes first, depending on driving conditions; consult manual for specific recommendations).
Transmission Fluid Change:
Automatic: 30,000 - 60,000 miles; Manual: 60,000 - 100,000 miles (refer to manual for precise intervals).
Coolant Flush Interval:
Every 30,000 - 50,000 miles or 2-5 years.
Power Steering Fluid Type:
ATF+4 (Chrysler Material Standard MS-9602) or equivalent
Common Issues Xj:
Headliner sagging, rust (especially rocker panels, floor pans, and tailgate), radiator leaks, front track bar wear, rear main seal leaks, heater core failures, and alternator failures.
Manual Benefit For Issues:
The manual provides detailed diagnostic steps and repair procedures to address these common issues effectively.