2004–2005 Jaguar XJ Technical Guide & Service Bulletin Collection (P/N JJM 18 15 21/40)

This collection combines Jaguar’s XJ Technical Guide, P/N JJM 18 15 21/40, January 2004 edition, with service and recall bulletins and a maintenance checklist for the 2004–2005 XJ range. The guide explains vehicle design and system operation; the appended bulletins provide specific diagnostic and repair procedures.

• Powertrain: AJ-V6 and AJ-V8 architecture, variable valve timing, electronic throttle control, evaporative emissions, engine-management interfaces, and automatic-transmission operation.

• Suspension and steering: Air-suspension modes, CATS adaptive damping, Servotronic operation, air-line service guidance, and power-steering flushing and bleeding.

• Fuel and transmission repairs: Injector cleaning, fuel-sender checks, shift-noise fluid flushing, torque-converter replacement, and transmission output-flange updates.

• Electrical diagnosis: CAN, SCP, and D2B networks, electrical load management, connector-contact repairs, parking-aid behavior, and telematics software updates.

• Body and cabin: Aluminum construction, water-entry tracing, audio-component water damage, center-console switch repairs, and seat-memory recalibration.

• Occupant protection: Advanced restraint-system architecture, SRS flash-code and PID definitions, possible-cause tables, and VIN-specific recall material.

The repair bulletins are intended for trained professional technicians with the knowledge, tools, and diagnostic equipment required for the work.

System Architecture and Service Limits

The Technical Guide is an overview, and Jaguar directs servicing to the appropriate JTIS information. Its electrical chapters reference a separate Electrical Guide for detailed circuit information. The included bulletins supplement that overview with procedures for particular faults and affected vehicles.

Bulletin applicability varies by chassis number, equipment, and symptom. Shared recall and checklist pages also mention other Jaguar models; those references do not establish full service coverage for those vehicles.

Air Suspension, Steering, and Brakes

The air-suspension System diagram connects the compressor, reservoir, valve block, height sensors, and control module. Explanations distinguish comfort and sport air springs, suspension operating modes, compressor thermal protection, and adaptive-damping control.

XJ204-01 warns that water entering the air tubing during soapy-water leak checks can harm the suspension system. Air-suspension work also requires secure vehicle support and the prescribed WDS-controlled depressurization.

The brake section distinguishes normally aspirated calipers from supercharged Brembo installations. It explains ABS/DSC interaction and electric-parking-brake reset behavior following a power interruption.

Fuel, Cooling, and Transmission Procedures

The V8 coolant-flow diagram separates engine-cooling paths from the supercharged arrangement. The normally aspirated fuel-tank schematic and V6 sensor-and-actuator schematic show fuel-delivery components and engine-control relationships.

XJ303-05 links rough idle and hesitation diagnosis to intake checks, fuel-trim readings, and pressurized injector cleaning. XJ310-01 adds instrument-cluster sender readings and bench resistance checks, with different pump applications for normally aspirated and supercharged vehicles.

Transmission bulletins address shift squeal through fluid flushing with WDS temperature monitoring, P0741 torque-converter replacement using lifting handles 307-139, and revised output-flange repairs. Referenced transmission removal and installation procedures remain in JTIS/GTR.

Network Faults, Cabin Systems, and Restraints

XJ413-02 connects simultaneous cluster warnings, heavy steering, and transmission limp-home operation with poor CAN connector contacts. The Controller area network diagram and CR120 pin views help technicians follow a shared connection fault before treating the symptoms as separate module failures.

Parking-aid material distinguishes external interference from the front inner-sensor issue involving the license-plate bracket. Other bulletins document telematics updates and seat-memory reconfiguration or recalibration.

The SRS reference links flash codes, DTC/PID combinations, connectors, harnesses, and possible causes. Water-entry illustrations identify leak paths affecting the cabin and luggage compartment, including audio components.

For aluminum body repairs, the guide explains how unsuitable fasteners can damage protective finishes and encourage galvanic corrosion. Detailed structural repair methods are assigned to the separate Body and Paint Repair Supplement.

A Preview of Air-Suspension and Steering Data

These examples are a small selection of the operating specifications explained in the guide.

The air-compressor section specifies a nominal operating pressure of 15 bar and a pressure-relief valve setting of 17.5 bar. These values accompany descriptions of pressure retention and component protection.

For the Servotronic system, the guide gives the power-steering pump a constant flow rate of 7.5 liters per minute and a maximum pressure of 110 bars, alongside its hydraulic and electronic operating explanation.

Searchable Text, Bookmarks, and Included Publications

Text search and diagram detail: Main text supports PDF searching, while some lettering within diagrams is outside the searchable text layer. Embedded bookmarks link to major guide sections and appended documents. Small labels in dense schematics require zooming for comfortable reading; sampled connector-pin views remain legible when enlarged.

Delivered as one printable, 371-page PDF. The publication breakdown below includes all supplementary material and repeated pages.

The guide’s total includes its front matter, three blank pages, and back cover. Both copies of the R719 section and all supplementary pages are already included in the total.