XJ-8L Sedan (X308) V8-4.0L (AJ27) (2001)
Cellular Phone: Diagram Information and Instructions
Introduction
INTRODUCTION
Electrical Format
The Electrical information is made up of two major sections. The first section, provides general information for and about the use of 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 each figure that is identified by a Figure Number (i.e. Fig. 01.1) and Title, and is
accompanied by data containing information specific to that Figure.
It is recommended that the user read the section to develop a familiarity with the layout of and with the system of symbols and abbreviations used. The
Component Index should help to guide the user.
Standard Abbreviations
The following abbreviations are used throughout Electrical Diagrams:
ACP
Audio Control Protocol Network
B+
Battery Voltage
CAN
Controller Area Network
DI
Direction Indicator
LH
Left-Hand
LHD
Left-Hand Drive
LWB
Long Wheelbase
N/A
Normally Aspirated
NAS
North American Specification
RH
Right-Hand
RHD
Right-Hand Drive
ROW
Rest of World
SC
Supercharged
SCP
Standard Corporate Protocol Network
VIN
Vehicle Identification Number
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
The vehicle electrical system is a ground side switched system. The ignition switch switches ground circuits on I off to complete system circuits and
apply power. Circuits that require ignition switch position control are supplied with "ignition switched grounds". Both power grounds (high current
consumers) and logic grounds (electronic switching circuits) are used throughout the system.
Three data networks are employed in the vehicle: a high speed Controller Area Network (CAN) for the engine, drive train and related systems, a
Standard Corporate Protocol network (SCP) for the body systems, and an Audio Control Protocol network (ACP) for certain In-Car Entertainment and
Telephone functions. 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 this book. In addition to the two networks, the vehicle
uses a serial data bus (ISO) for diagnostics, security sounder operation and for the programming of certain control modules.
User Instructions
FIGURE AND DATA LAYOUT