Jeep Liberty 2002–2003 Service Manual Set (P/N 81-370-02060)

The 2.4L Gas Supplement supplies additional material for use with the 2002 base manual. Its sections carry an “S” suffix in their group numbering; use the volume and section that match the vehicle and system being serviced.

Transmission coverage: The 2002 PDF omits Group 21, despite references to it in the index. The transmission and transfer-case repair chapters supplied here belong to the 2003 volume and should not be treated as year-specific procedures for 2002.

Diesel coverage: The VIN tables and selected clutch, cooling, starting/charging, instrument, steering, HVAC, and wiring sections address the 2.5L diesel configuration. Internal engine repair chapters cover the gasoline engines.

Text Search, Electrical Bookmarks and PDF Contents

Search and diagram detail: Both PDFs support text search through their main service text, but numerous wiring-diagram pages lack searchable text. Some appended parts-reference pages also lack a text layer. The 2002 PDF has bookmarks for electrical groups; the 2003 PDF has no embedded bookmarks. Small pin numbers and wire codes on the sampled diagrams are readable when enlarged.

The ZIP contains two printable English-language PDFs totaling 3,934 pages. The 2002 file combines the service material with the 15-page parts/labor excerpt. These totals already include the original cover and introductory material, indexes, and 27 blank pages in the 2002 file plus 37 in the 2003 file.

Gasoline Engine Repair, Drivetrain Overhaul and Circuit Diagnosis

The following is a selection of covered work, rather than a complete contents list. Other topics include heated-seat diagnosis and sunroof service.

• Engine diagnosis and repair: Compression and leakage testing, engine removal and installation, cylinder-head work, crankshaft and bearing inspection, oil-pump service, and timing-system repair.

• Transmission and transfer cases: The 2003 volume covers NV1500, NV3550, 42RLE, and 45RFE service, plus NV231 and NV242 diagnosis, removal, disassembly, inspection, and assembly.

• Axles and driveline: 186FIA front axle, 198RBI and Chrysler 8¼ rear axles, Trac-lok differentials, propeller shafts, half shafts, and inner and outer CV-joint service.

• Suspension, steering and brakes: Ball-joint and control-arm bushing replacement, ride-height measurement, caster/camber/toe adjustment, steering diagnosis, disc and drum service, ABS diagnosis, and bleeding.

• Electrical diagnosis: System wiring diagrams, connector pinouts, splice and ground locations, circuit tests, module diagnosis, and PCM/SKIM and ignition-key programming.

• Other vehicle systems: Cooling, fuel delivery and emissions controls, heating and air conditioning, restraints, body hardware, glass, lighting, power accessories, and instrument-cluster diagnosis.

The 2002 foreword identifies professional automotive technicians as its intended readers; the repair work assumes suitable lifting equipment, scan tools, pullers, presses, and precision measuring tools.

Engine Inspection and Timing Work

The gasoline-engine sections provide step-by-step procedures for internal inspection and component service. The 2.4L material includes balance-shaft chain timing alongside timing-belt work; the 3.7L sections address timing-chain installation and timing verification.

Fuel-system coverage extends to pressure and leak-down testing, fuel-pump diagnosis, and injector service. Cooling sections provide diagnostic charts, pressure testing, and component-specific service information rather than fluid specifications alone.

Axle Setup and Transmission Testing

Axle overhaul includes pinion-depth measurement, bearing preload, ring-gear backlash, tooth-contact patterns, shim selection, differential case setup, and Trac-lok assembly. The 198RBI rear-axle repair material is in the 2002 volume; the 2003 rear-axle chapter covers the Chrysler 8¼.

Propeller-shaft sections address operating angles, runout, balance, and single-Cardan joints. Half-shaft procedures cover CV-joint and boot disassembly, inspection, and assembly.

Within the 2003 transmission chapters, hydraulic pressure tests and clutch air checks support geartrain and valve-body diagnosis. Adjustment procedures and operational checks accompany the overhaul material.

Chassis Diagnosis and HVAC Service

Diagnostic charts distinguish front-end noise, wheel shimmy, instability, lead or drift, improper tracking, and excessive steering effort. These symptom-specific entries help narrow the inspection path before alignment data or replacement procedures are selected.

Brake coverage includes base-brake inspection and ABS bleeding. HVAC procedures cover performance testing, refrigerant recovery, evacuation, leak testing, and charging.

Illustrations, Circuit References and Special Tools

Illustrations include C/V Components, Pinion Gear Depth Tools, Shim Locations, Geartrain and Shift Components, the 42RLE Valve Body - Exploded view, and Lubrication Oil Flow.

Electrical sections cover Power Distribution, Bus Communications, Fuel/Ignition, Transmission Control, and Antilock Brake circuits, with connector, splice, and ground-location views.

Tool references include Pinion Depth Set 6774, Dial Indicator C-3339, axle-housing spreader W-129-B, Ball Joint Press C-4212F, and wiring Special Tool Package 6807. Component torque tables, fluid specifications, wear limits, clearances, pressure-test data, alignment specifications, and electrical test values accompany the procedures.

The embedded parts/labor excerpt adds illustrated part-number and labor-reference entries. It is an excerpt rather than a complete estimating guide.

Timing and Differential Repair Cautions

Although the 2.4L engine is described as free-wheeling, independently rotating its camshafts can cause valve-to-valve contact. On the Chrysler 8¼ axle, an over-crushed collapsible spacer cannot be corrected by loosening the pinion nut, and reused ring-gear bolts can fracture and damage the assembly.

Heavy drivetrain components, loaded suspension parts, pressurized cooling and refrigerant systems, and supplemental restraints require the manual’s vehicle-support, pressure-release, refrigerant-recovery, and electrical-isolation precautions.

A Preview of 3.7L Shaft End-Play Specifications

The 2002 3.7L engine specification table lists crankshaft end play of 0.052–0.282 mm. Its camshaft specification gives end play of 0.075–0.200 mm. These component-specific inspection ranges accompany the internal engine service material.