🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

1991

Generation Code:

WJ

👋 Introduction

Market Position:

A professional-grade service manual designed for owners and mechanics to maintain and repair their 1991 Jeep Grand Cherokee WJ.

Competitive Analysis:

Positions itself as the direct equivalent of official dealer workshop manuals, offering a complete and detailed resource compared to generic repair guides.

Key Features:

Step-by-step diagrams, comprehensive system coverage, detailed electrical diagrams, torque specifications, fluid capacities, designed for ease of use by both novice and experienced users.

Target Audience:

Jeep Grand Cherokee owners, DIY mechanics, professional automotive repair technicians.

Documentation Type:

Factory Service Repair Manual.

Goal Of Manual:

To provide users with all necessary information to get their Jeep Grand Cherokee back on the road, from basic maintenance to complex repairs.

📋 Manual Details

Coverage Areas:

Complete service and repair for Jeep Grand Cherokee WJ 1991

Page Count:

Not specified, but described as 'COMPLETE' and 'packed with all the information'

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

PDF

Compatibility:

Compatible with all versions of Windows & Mac.

Requirements:

Adobe PDF Reader & WinZip.

Zoom Functionality:

YES (Zoom in/out functionality provided).

📖 Manual Coverage

Systems Covered:

Lubrication and Maintenance, Suspension, Differential and Driveline, Brakes, Clutch, Cooling System, Battery, Starting System, Charging System, Ignition System, Instrument Panel Systems, Audio Systems, Horn Systems, Vehicle Speed Control System, Turn Signal and Hazard Warning Systems, Wiper and Washer Systems, Lamps, Passive Restraint Systems, Electrically Heated Systems, Power Distribution Systems, Power Lock Systems, Vehicle Theft/Security Systems, Power Window Systems, Power Mirror Systems, Chime/Buzzer Warning Systems, Overhead Console Systems, Wiring Diagrams, Engine, Exhaust System and Intake Manifold, Frame and Bumpers, Fuel System (2.5L Diesel Engine), Steering, Transmission and Transfer Case, Tires and Wheels, Body, Heating and Air Conditioning, Emission Control Systems

Procedures Included:

Detailed instructions and step-by-step diagrams for all workshop procedures, including basic maintenance (e.g., changing spark plugs), advanced diagnostics, electrical troubleshooting, fluid changes, torque settings, and complete repair procedures.

Technical Depth:

Comprehensive, covering everything from routine maintenance to in-depth repairs and diagnostics, equivalent to official dealer workshop manuals.

Electrical Diagrams:

Detailed wiring diagrams are explicitly included, covering all vehicle electrical systems for troubleshooting and repair.

Diagnostic Procedures:

Includes step-by-step diagnostic procedures for identifying and resolving common and uncommon faults within all vehicle systems.

Body Repair:

Body section includes procedures for repairing body panels, doors, latches, hinges, glass, and trim.

HVAC Repair:

Heating and Air Conditioning section covers diagnosis and repair of the HVAC system, including refrigerant, blower motor, compressor, and climate controls.

Emission Control:

Emission Control Systems section details components and procedures related to meeting emissions standards, including catalytic converters, oxygen sensors, and EGR systems.

Rebuild Procedures:

Comprehensive instructions for rebuilding major components like engines, transmissions, differentials, and brake systems.

Troubleshooting Guides:

Implied through detailed diagrams, procedures, and system coverage, enabling users to diagnose and fix issues.

📊 Manual Specifications

File Format:

PDF

Print Quality:

Digital reproduction, zoomable for clarity of diagrams and text.

Binding Type:

Digital (N/A for PDF)

Paper Type:

Digital (N/A for PDF)

Searchable:

PDF format typically allows for text searching of keywords, enhancing usability.

⚙️ Engine Specifications

Primary Engine:

2.5L Diesel Engine (Specifics for other potential engines for the 1991 WJ Grand Cherokee would be detailed within the manual, but only the diesel is explicitly mentioned as a covered fuel system).

Performance:

Detailed performance tuning and diagnostic procedures for the 2.5L Diesel engine would be included.

Fuel System:

Fuel System (2.5L Diesel Engine) coverage includes diagnosis, repair, and maintenance of the diesel fuel injection system, fuel pump, filters, and lines.

Engine Variants:

While the 2.5L Diesel is highlighted, the manual likely covers other gasoline engines offered in the 1991 Grand Cherokee ZJ (e.g., 4.0L Inline-6, 5.2L V8) which would be detailed within the comprehensive 'Engine' section.

🔧 Transmission

Standard:

Coverage of the transmission and transfer case systems is explicitly listed.

Optional:

Manual likely covers all factory transmission options for the 1991 WJ Grand Cherokee, though specific types (e.g., automatic vs. manual gearbox) are not detailed in the product description.

Features:

Includes repair, maintenance, and diagnostic procedures for the transmission and transfer case, likely detailing fluid types, capacities, and shift mechanism adjustments.

Transfer Case:

Detailed coverage of the transfer case, including repair, maintenance, and operation of 4WD systems specific to the 1991 Grand Cherokee ZJ.

📐 Dimensions

Exterior:

Body and frame sections would contain dimensions, body panel repair, and alignment procedures. Specific exterior dimensions are not provided in the product description but are a standard inclusion in such manuals.

Interior:

Interior trim, upholstery, and accessory installation/repair details would be present, though specific interior dimensions are not detailed in the product description.

Cargo:

Body section would likely include cargo area specifications and related component repair.

Weights:

Torque settings and component weight considerations for repairs would be detailed within relevant sections.

🛡️ Safety Features

Ratings:

Passive Restraint Systems coverage implies information on airbags and seatbelt mechanisms. Specific crash test ratings (e.g., NHTSA, IIHS) are not detailed in the product description but might be referenced implicitly in diagnostic procedures.

Active Features:

Includes systems like Vehicle Speed Control, Brakes, Steering, and potentially ABS (if equipped on 1991 WJ), with repair and diagnostic information.

Passive Features:

Passive Restraint Systems coverage would detail the operation, testing, and replacement of components such as seatbelts and airbags.

💡 Technology Features

Infotainment:

Covers Audio Systems, Instrument Panel Systems, and likely ancillary electronics. Specific features of the 1991 system would be detailed.

Driver Assistance:

Vehicle Speed Control System and potentially ABS (if applicable to 1991 models) are covered. No advanced driver-assistance systems (ADAS) would be expected for this era.

Connectivity:

Limited connectivity features would be expected for a 1991 vehicle; however, the manual covers wiring diagrams for all electrical systems, which would include basic connectivity between components.

🔧 Maintenance

Service Intervals:

Detailed maintenance schedules for various mileage and time intervals, covering oil changes, filter replacements, fluid checks, and component inspections.

Fluid Specifications:

Specifies required fluid types (e.g., engine oil viscosity, coolant type, transmission fluid, brake fluid, power steering fluid, differential oil) and capacities for all vehicle systems.

Known Issues:

While not explicitly stated as a 'known issues' section, the comprehensive nature of the manual would enable diagnosis and repair of common wear and tear items and potential failures specific to the 1991 ZJ Grand Cherokee platform.

Torque Settings:

Specific torque specifications for critical fasteners across all mechanical systems (engine, suspension, brakes, drivetrain, body).

Filter Part Numbers:

While not explicitly listed in product description, a complete factory service manual would include part numbers for essential filters like oil, air, fuel, and cabin air filters.

📚 Vehicle History

Brand Heritage:

Jeep's long-standing heritage in rugged, capable SUVs is the foundation of the Grand Cherokee line.

Model Evolution:

The WJ generation, introduced in 1999, represented a significant redesign over the ZJ generation. However, this manual specifically pertains to a 1991 model, which corresponds to the ZJ generation (Grand Cherokee 'ZJ' 1993-1998). There appears to be a discrepancy in the product name ('WJ 1991'). Assuming the year is correct, this manual would cover the ZJ generation. If 'WJ' is correct, the year would be incorrect (WJ started in 1999).

Production:

This manual covers a 1991 Jeep Grand Cherokee, which was part of the original ZJ generation (1993-1998). The description's mention of 'WJ' for 1991 is factually inaccurate for the model generation, suggesting a potential error in the product listing. The manual would cover the ZJ platform for the 1991 model year.

📄 Vehicle Specs

Chassis:

Frame and Bumpers section implies comprehensive data on chassis integrity, repair, and components.

Wheel Bolt Pattern:

Tires and Wheels section would contain information on wheel specifications, including bolt pattern, offset, and tire size recommendations.

Suspension Type:

Suspension section covers repair and maintenance of front and rear suspension components, likely including coil springs, shock absorbers, control arms, and bushings.

Brake System:

Brakes section details front and rear brake systems, including disc/drum configurations, hydraulic components, parking brake, and ABS diagnostics if equipped.

Steering System:

Steering section covers the power steering system, steering column, linkage, and wheel alignment procedures.

Cooling System Components:

Cooling System section details radiator, fan, water pump, thermostat, hoses, and coolant types and capacities.

Exhaust System Components:

Exhaust System and Intake Manifold section covers exhaust manifolds, pipes, catalytic converter, muffler, and intake system diagnostics and repair.

Body Style:

SUV

Drivetrain:

4x4 (Four-wheel drive) is a primary feature of Jeep Grand Cherokees, and the manual covers Differential and Driveline systems.

Battery Specifications:

Battery section would cover battery types, testing, charging, and replacement procedures. Specific group sizes and CCA requirements would be detailed.

Starting System Components:

Starting System section would detail the starter motor, solenoid, ignition switch, and related wiring.

Charging System Components:

Charging System section would cover the alternator, voltage regulator, battery, and related wiring.

Ignition System Components:

Ignition System section would detail spark plugs, ignition coils, distributor (if applicable), wiring, and ignition timing procedures.