XK-8 Coupe (X100) V8-4.0L (AJ26) (1998)
Control Module: Diagram Information and Instructions
Abbreviations and Acronyms
The following abbreviations are used throughout this Electrical Guide:
B+
Battery Voltage
CAN
Controller Area Network
COUPE Coupe Vehicles
CONV.
Convertible Vehicles
DI
Direction Indicator
LH
Left-Hand
LHD
Left-Hand Drive
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
Electrical System Architecture
XK8 Electrical System Architecture
The XK8 system "architecture" features vehicle multiplexing. Multiplexing allows for greatly simplified wiring harnesses, while at the same time
allowing flexibility in programing 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 listed in
CAN/SCP Network See: Computers and Control Systems/Vehicle Multiplex Systems - CAN / SCP/Description and Operation
In addition to the two networks, the XK8 uses a serial data bus (ISO) for diagnostics and for the programming of certain control modules.
The XK8 uses both power and logic grounds; however, it does not use a common logic ground stud connection as in previous Sedan vehicles.
Electrical Diagram Layout
Figure
Each Figure image represents a specific electrical system of the vehicle. The Figures are arranged numerically by system (01 - Power Distribution, 02 -
Ground Distribution, etc.) with variations in the system identified by a numeral following a decimal point (01.1, 01.2, etc.). For a complete list of the
Diagrams By Figure Number, refer to Vehicle / Diagrams See: Diagrams/Electrical Diagrams
The Figures 01 - Power Distribution detail the distribution of power to each of the systems. Numbered reference symbols refer the user to a specific
Figure and from a specific Figure back to the Power Distribution Figures. This method eliminates the need to include detailed Power Distribution
information on each of the Figures. Similarly, the Figure 02 - Ground Distribution details the ignition switched ground distribution. The reference
symbols are defined in Reference Symbols. See: Key to Wiring Diagrams/Reference Symbols
Each Figure image appears with a corresponding Data images. The user must view all images in order to access all the information provided.
Data Images
The Data images include information to assist the user in identifying and locating components, connectors and grounds.
When network data is required for the understanding of a particular circuit, refer to CAN/SCP Network See: Computers and Control Systems/Vehicle
Multiplex Systems - CAN / SCP/Description and Operation
Where circuits include a Control Module, Pin Out information is provided with values for "active" and "inactive" states. The values listed are
approximately those that can be expected at the control module connector pins with all circuit connections made and all components connected and
fitted. "Active" means a load is applied or a switch is ON; "inactive" means a load is not applied or a switch is OFF. This information is provided to
assist the user in understanding circuit operation and should be used FOR REFERENCE ONLY.
Reference Symbols