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BY APPOINTMENT TOHER MAJESTY QUEEN ELIZABETH IIMANUFACTURERS OF DAIMLER AND JAGUAR CARSJAGUAR CARS LIMITED COVENTRYBY APPOINTMENT TOHER MAJESTY QUEEN ELIZABETHTHE QUEEN MOTHERMANUFACTURERS OF DAIMLER AND JAGUAR CARSJAGUAR CARS LIMITED COVENTRYBY APPOINTMENT TOHIS ROYAL HIGHNESS THE PRINCE OF WALESMANUFACTURERS OF DAIMLER AND JAGUAR CARSJAGUAR CARS LIMITED COVENTRYXJ Series Sedan 1998Electrical GuidePublished by Parts and Service CommunicationsJaguar Cars LimitedPublication Part Number – JTP 608

XJ Series 1998IntroductionElectrical Guide FormatThis Electrical Guide is made up of two major sections. The first section, at the front of the book, provides general informationfor and about the use of the book, and information and illustrations to aid in the understanding of the XJ Series electrical / electronic systems, as well as the location and identification of components.The second section includes the Figures, which are the basis of the book. Each Figure is identified by a Figure Number(i.e. Fig. 01.1) and Title, and is accompanied by a page of data containing information specific to that Figure.It is recommended that the user read through the front section of the book to develop a familiarity with the layout of thebook and with the system of symbols and abbreviations used. The Table of Contents on the following pages should helpto guide the user.Standard AbbreviationsThe following abbreviations are used throughout this Electrical Guide:B Battery VoltageCANController Area NetworkDIDirection IndicatorLHLeft-HandLHDLeft-Hand DriveLWBLong WheelbaseN/ANormally AspiratedNASNorth American SpecificationRHRight-HandRHDRight-Hand DriveROWRest of WorldSCSuperchargedSCPStandard Corporate Protocol NetworkVINVehicle Identification NumberRefer to the Vehicle Service Manual for a glossary of standard terms and their abbreviations.Vehicle Identification Numbers (VIN)VIN ranges are presented throughout the book in the following manner: VIN 123456 indicates “up to VIN 123456”; VIN 123456 indicates “from VIN 123456 on”.XJ Series Electrical System ArchitectureThe 1998 Model Year XJ Series uses an advanced electrical system architecture which features “multiplexing”, firstintroduced in Jaguar vehicles with the XK8. Multiplexing allows for simplified wiring harnesses while providing greaterflexibility in programming market variants. Two data networks are used in the system: a controller area network (CAN)for the engine, drive train and related systems, and a standard corporate protocol network (SCP) for the body systems.Any vehicle subsystem depicted on the figures with the CAN or SCP included uses data derived from the network,or transmits data via the network to achieve control. Messages for both networks are cataloged in the Appendix of thisbook. When appropriate, the user will be referred to the Appendix by a note on the Data page. In addition to the two networks,the XJ Series uses two serial data buses (ISO) for diagnostics, for the security system and for the programming of certaincontrol modules.The XJ Series uses both power and logic grounds; however, it does not use a common logic ground stud connection as inprevious Sedan vehicles.DATE OF ISSUE:SEPTEMBER 19971

Table of ContentsXJ Series 1998Component Index . 5 – 11User Instructions . 12 – 17Connectors . 18 – 19Main Power Distribution . 20Harness Layout . 21Ground Point Identification and Location . 22Control Module Identification and Location . 23Control Module Connector Pin Identification and Location . 24 – 28Relay and Fuse Box Identification and Location . 29NOTE: The Appendix, which contains a catalog of CAN and SCP Network messages, follows the Figure and Data pages.2DATE OF ISSUE: SEPTEMBER 1997

XJ Series 1998FIGURESFig.DescriptionTable of ContentsVariant01Power Distribution01.1 . Main Power Distribution . All Vehicles01.2 . Battery Power Distribution: LH and RH Heelboard Fuse Boxes . All Vehicles01.3 . Battery Power Distribution: Trunk, Engine Compartmentand EMS Fuse Boxes . All Vehicles01.4 . Ignition Switched Power Distribution . All Vehicles01.5 . Engine Management Switched Power Distribution . All Vehicles02Ground Distribution02.1 . Ignition Switched Ground Distribution . All Vehicles03Battery; Starter; Generator03.1 . Battery, Starter, Generator: AJ26 N/A . AJ26 N/A Vehicles03.2 . Battery, Starter, Generator: AJ26 SC . AJ26 SC Vehicles0404.104.204.304.404.504.604.7.Engine ManagementAJ26 4.0 N/A NAS Engine Management: Part 1 . AJ26 4.0 N/A NAS VehiclesAJ26 4.0 N/A ROW Engine Management: Part 1 . AJ26 4.0 N/A ROW VehiclesAJ26 3.2 Engine Management: Part 1 . AJ26 3.2 VehiclesAJ26 4.0 N/A and 3.2 Engine Management: Part 2 . AJ26 4.0 N/A and 3.2 VehiclesAJ26 4.0 SC NAS Engine Management: Part 1 . AJ26 4.0 SC NAS VehiclesAJ26 4.0 SC ROW Engine Management: Part 1 . AJ26 4.0 SC ROW VehiclesAJ26 4.0 SC Engine Management: Part 2 . AJ26 4.0 SC Vehicles05Transmission05.1 . AJ26 N/A Automatic Transmission . AJ26 N/A Vehicles05.2 . AJ26 SC Automatic Transmission . AJ26 SC Vehicles05.3 . Gearshift Interlock . All Vehicles06Anti-Lock Braking06.1 . Anti-Lock Braking; Traction Control . All Vehicles07Climate Control07.1 . Climate Control: Part 1 . All Vehicles07.2 . Climate Control: Part 2 . All Vehicles08Instrumentation; Audible Warnings08.1 . Instrument Pack; Clock . All Vehicles08.2 . Audible Warnings . All Vehicles0909.109.209.309.409.5.Exterior LightingExterior Lighting: NAS Front . NAS VehiclesExterior Lighting: ROW Front . ROW VehiclesExterior Lighting: NAS Rear . NAS VehiclesExterior Lighting: ROW Rear . ROW VehiclesHeadlamp Leveling . Headlamp Leveling VehiclesDATE OF ISSUE:SEPTEMBER 19973

Table of ContentsFIGURESFig.DescriptionXJ Series 1998Variant10Interior Lighting10.1 . Interior Lighting; Garage Door Opener . All Vehicles10.2 . Dimmer Controlled Lighting . All Vehicles1111.111.211.311.411.511.6Steering; Mirrors; Suspension. Power Assisted Steering . All Vehicles. Steering Column Movement . Powered Column Vehicles. Mirror Movement: Memory . Memory Vehicles. Mirror Movement: Non-Memory . Non-Memory Vehicles. Interior and Exterior Mirrors; Fold-Back Mirrors . All Vehicles. Suspension Adaptive Damping . Adaptive Damping Vehicles12Seat Systems12.1 . Driver Seat: Memory . Driver Memory Seat Vehicles12.2 . Driver Seat: 5-Way Powered . Driver 5-Way Powered Seat Vehicles12.3 . Driver Seat: Raise / Lower . Driver Raise / Lower Seat Vehicles12.4 . Passenger Seat: 5-Way Powered . Passenger 5-Way Powered Seat Vehicles12.5 . Passenger Seat: 5-Way Powered / LWB . LWB Powered Rear Seat Vehicles12.6 . Heaters Only Front Seats: LHD . Heaters Only Front Seats LHD Vehicles12.7 . Heaters Only Front Seats: RHD . Heaters Only Front Seats RHD Vehicles12.8 . Rear Seats: Powered . LWB / Powered Seat Vehicles12.9 . Rear Seat Heaters: Powered Seats . LWB / Powered Seat Vehicles12.10 . Rear Seat Heaters . Heaters Only Rear Seat Vehicles13Door Locking13.1 . Central Door Locking: ROW . ROW Vehicles13.2 . Central Door Locking: NAS . NAS Vehicles14Wash / Wipe System14.1 . Wash / Wipe System . All Vehicles15Window Lifts; Sliding Roof15.1 . Window Lifts, Sliding Roof: LHD . LHD Vehicles15.2 . Window Lifts, Sliding Roof: RHD . RHD Vehicles16In-Car Entertainment (ICE); Telephone16.1 . Standard In-Car Entertainment . Standard ICE Vehicles16.2 . Premium In-Car Entertainment . Premium ICE Vehicles16.3 . Radio Telephone . All Vehicles17Supplementary Restraint System17.1 . Airbags / Seat Belt Pretensioners . All Vehicles18Ancillaries18.1 . Ancillaries: Horns; Cigar Lighters; Accessory Connectors . All Vehicles19Vehicle Multiplex Systems19.1 . CAN and SCP Networks . All Vehicles19.2 . Serial Data Links . All Vehicles4DATE OF ISSUE: SEPTEMBER 1997

XJ Series 1998ABS / TRACTION CONTROL CONTROL MODULE . Fig. 06.1. Fig. 19.1ACCELEROMETER – LATERAL . Fig. 11.6ACCELEROMETERS – VERTICAL . Fig. 11.6ACCESSORY CONNECTOR RELAY . Fig. 18.1ACTIVE SECURITY SOUNDER . Fig. 13.3ADAPTIVE DAMPING CONTROL MODULE . Fig. 11.6. Fig. 19.2AIR CONDITIONING COMPRESSOR CLUTCH . Fig. 04.4. Fig. 04.7. Fig. 07.2AIR CONDITIONING COMPRESSOR CLUTCH RELAY . Fig. 04.4. Fig. 04.7. Fig. 07.2AIR CONDITIONING CONTROL MODULE . Fig. 04.4. Fig. 04.7. Fig. 07.1. Fig. 07.2. Fig. 19.2AIR CONDITIONING CONTROL PANEL . Fig. 07.1. Fig. 10.2AIR CONDITIONING ISOLATE RELAY . Fig. 07.1AIRBAG / SRS SINGLE POINT SENSOR . Fig. 17.1. Fig. 19.2AIRBAG – DRIVER SIDE .