Description And Operation: Introduction

The vehicle electrical system consists of a number of control modules connected via two multiplexed CAN (controller area network) busses. The Instrument cluster acts as a gateway between the two CAN bus systems.

Lower speed control modules use a LIN (local interconnect network) bus. Control modules on the LIN bus are generally configured to be master/slave i.e. one module controls other module(s).

The vehicle entertainment system uses a fibre optic bus system, which uses the MOST (media oriented systems transport) protocol for transmission of data and audio to the relevant components of the audio system.

MODULE	BUS SYSTEM	FUNCTION	LOCATION
ECM (engine control module)	HS CAN	Controls the engine in response to various sensor inputs.	Front LH (left-hand) side in engine compartment adjacent to bulkhead.
ABS (anti-lock brake system) module	HS CAN	Controls the braking force applied to the road wheels.	In the engine compartment next to the ECM.
Instrument cluster	HS CAN, MS CAN and LIN	Gateway between High speed and Medium speed CAN, gateway between the CAN busses and the LIN bus.	On the driver side in the instrument panel.
Parking aid control module	MS CAN	Control of parking sensors and routing of audio feedback to driver.	Lower LH A pillar below the CJB (central junction box).
Navigation computer	MOST, GVIF	Route guidance output based on inputs from GPS (global positioning system) satellites and driver destination.	In the luggage compartment to the right of battery.
RCM (restraints control module)	MS CAN	Controls the deployment of supplementary restraint components.	On the transmission tunnel between the seats under the trim.
TPMS (tire pressure monitoring system) module	MS CAN	Monitors the vehicle tires to warn of deflation.	Behind the rear seats next to the AJB (auxiliary junction box).
TCM (transmission control module)	MS CAN	Electronic control of the automatic gear change.	In the sump of the transmission.
Steering column lock	MS CAN	Inhibits the steering from being turned without the proper security parameters being met.	On the steering column.
Headlamp leveling/adaptive front lighting module	HS CAN	Controls headlamp levels and adaptive front lighting system.	RH (right-hand) foot well mounted against inner bulk head.
Adaptive speed control radar sensor	HS CAN	Supplies range, relative velocity and angular data (of other vehicles/objects) to the ECM.	On vehicle center-line behind top of front bumper cover.
CJB	MS CAN	Controls body functions and power distribution.	In the passenger compartment RH side on the A pillar.
AJB	MS CAN	Controls body functions and power distribution.	In the center behind the backrest of the rear passenger seat.
Seat climate control module	MS CAN	Controls the operation of the climate control system in the front seats.	In the instrument panel.
ADCM	HS CAN	Controls the adjustment of the dampers.	Behind the backrest of the RH rear passenger seat.
EPB (electronic parking brake) module	HS CAN	Controls the application and release of the parking brake.	Behind the auxiliary junction box.
ATC (automatic temperature control) module	MS CAN	Controls the operation of the climate control/air-conditioning system.	Attached to the side of air conditioning unit.
Information and entertainment control module	MS CAN	Gateway between the MOST and CAN systems for information and control distribution.	Behind the TSD and above the integrated audio unit.
Driver door module	MS CAN	Memory/adjustment functions for seats, steering column and mirrors and security functions.	In the drivers door behind the trim.
Passenger door module	MS CAN	Memory/adjustment functions for seats, steering column and mirrors and security functions.	In the passenger door behind the trim.
Integrated control panel	MS CAN	Contains controls for entertainment system and air conditioning system.	Center of the instrument panel surrounding the TSD.
Driver seat module	MS CAN	Controls seat positioning and memory seat functions.	Under the drivers seat.
Passenger seat module	MS CAN	Controls seat positioning and memory seat functions.	Under the front passenger seat.
Keyless vehicle module	MS CAN	Allows the vehicle to be opened and started without the use of a key.	Right hand A pillar.
JaguarDrive selector module	MS CAN	Electronic control of the selected gear/driving mode.	On top of the transmission tunnel.
Key start control module	LIN	Used if the keyless vehicle module is unable to authorize the smart key.	In the center console.
Pedestrian protection system module	HS CAN	Control and monitoring of pedestrian protection system.	On the LH side under the wheel arch liner at the top of the wheel arch.
DLM	HS CAN	Controls the operation of the motor on the electronic differential.	LH side of the luggage compartment, immediately forward of the tail lamp.