Modules, Systems And Function

The CJB (central junction box) is the 'gateway' for the network systems which allows information to be exchanged between networks.

The entertainment system components are connected on a fiber optic MOST ring. The MOST ring can send and receive information to/from the other network systems via a 'gateway' in the Integrated Control Module.

The following table shows each vehicle control module, the network system to which it is connected, its function and location in the vehicle.

MODULE	NETWORK SYSTEM	FUNCTION	VEHICLE LOCATION
Instrument cluster	High speed CAN (controller area network) bus	Receives data from other vehicle systems to provide information to the driver. Also functions as the gateway for the bus systems.	Instrument panel.
Steering column	High speed CAN bus	Controls the locking and unlocking of the steering column.	Upper steering column.
Diagnostic socket	High speed CAN bus	Allows the transfer of vehicle information using a Jaguar approved diagnostic system or other diagnostic tool.	In the lower instrument panel on the driver's side, adjacent to the start control module.
RCM (restraints control module)	High speed CAN bus	Controls the deployment of the supplementary restraint components.	At rear of floor console.
TCM (transmission control module)	High speed CAN bus	Controls automatic transmission operation.	Inside the transmission and accessible via the fluid pan.
ECM (engine control module)	High speed CAN bus	Controls engine management and fuel system operation.	Rear of the engine compartment on the bulkhead.
ABS (anti-lock brake system)	High speed CAN bus	Controls all aspects of the braking system	Rear of the engine compartment on the bulkhead.
Headlamp leveling module	High speed CAN bus	Controls the static dynamic headlamp leveling function.	In the lower instrument panel, behind the glovebox.
Occupant classification system control module (NAS only)	High speed CAN bus	Detects when a passenger is in the front passenger seat and can determine their size and weight.	Below the front passenger seat.
Adaptive damping control module	High speed CAN bus	Controls the adjustment of the dampers.	Below the front passenger seat.
Electronic Parking Brake (EPB) module	High speed CAN bus	Controls the application and release of the electronic parking brake.	In the luggage compartment, above the RH (right-hand) wheel arch.
Pedestrian protection module	High speed CAN bus	Controls and monitors the pedestrian protection system.	LH (left-hand) 'A' pillar.
Adaptive speed control module	High speed CAN bus	Controls the vehicle's road speed in relation to other vehicles when in speed control mode.	Behind the instrument panel on the driver's side.
Electronic transmission selector	High speed CAN bus	Allows the driver to electronically select the required automatic transmission mode. Transmits driver selections to the TCM.	In the floor console.
Jaguar Drive control module	High speed CAN bus	Controls the Jaguar Drive function and communicates with other system modules.	Integral with the electronic transmission selector software in the floor console.
CJB	Medium speed CAN bus	Controls body functions and power distribution.	On RH 'A' pillar.
Diagnostic socket	Medium speed CAN bus	Allows the transfer of vehicle information using a Jaguar approved diagnostic system or other diagnostic tool.	In the lower instrument panel on the driver's side, adjacent to the start control module.
Passenger door module	Medium speed CAN bus	Controls window and locking functions.	In the front passenger door.
Parking aid module	Medium speed CAN bus	Controls the parking aid system.	In the LH side of the luggage compartment, adjacent to the keyless vehicle module.
Driver's seat module	Medium speed CAN bus	Controls driver's seat positioning and also memory functions of other personalized functions.	Below the driver's seat.
Instrument cluster	Medium speed CAN bus	Receives data from other systems to provide driver information.	In the instrument panel.
Driver's door module	Medium speed CAN bus	Controls window and locking functions.	In the driver's door.
ATC (automatic temperature control) module	Medium speed CAN bus	Contains controls for the heating and air conditioning systems.	On the end of the air conditioning evaporator and blower assembly.
Information control module	Medium speed CAN bus	Contains controls for the entertainment systems.	In the instrument panel below the integrated control panel.
Integrated control panel	Medium speed CAN bus	Contains controls for the entertainment systems and gateway between audio system and other vehicle systems.	In the instrument panel.
Front seat climate control module	Medium speed CAN bus	Controls the temperature requirements of the driver and passenger front seats.	Below the RH front seat.
LH blind spot monitoring module	Medium speed CAN bus	Controls the operating parameters of the system and provides driver indications and fault monitoring.	Behind the outer part of the rear bumper, rearward of the rear wheel.
RH blind spot monitoring module	Medium speed CAN bus	Controls the operating parameters of the system and provides driver indications and fault monitoring.	Behind the outer part of the rear bumper, rearward of the rear wheel.
Keyless vehicle module	Medium speed CAN bus	Allows the vehicle to be opened and closed without the use of a key.	In the LH side of the luggage compartment, adjacent to the parking aid module.
RJB (rear junction box)	Medium speed CAN bus	Controls body functions and power distribution.	RH of luggage compartment.
Tire pressure monitoring control module	Medium speed CAN bus	Monitors the vehicle tires to warn of deflation.	Below the rear of the floor console.
TCM	K Bus	Data transfer between TCM and diagnostic socket. NOTE: Only fitted to early build vehicles.	Inside the transmission and accessible by removal of the fluid pan.
Driver's side rear door module	LIN (local interconnect network)	Controls window and locking operation.	In the driver's side rear door.
Passenger side rear door module	LIN	Controls window and locking operation.	In the passenger side rear door.
Driver's door module	LIN	Memory/adjustment functions for seat, steering column and mirrors and door security functions.	In the driver's door.
Passenger front door module	LIN	Memory/adjustment functions for seat, steering column and mirrors and door security functions.	In the passenger door.
Driver's door switches	LIN	Transmit driver selections to the driver's door module.	In the driver's door panel.
ECM	LIN	Receives a load signal from the generator.	In the engine compartment on the bulkhead.
Generator	LIN	Provide load signal to the ECM.	On the LH side at the front of the engine.
Driver's seat module	LIN	Control position of driver's seat.	Below the driver's seat on the floor pan.
Driver's seat switches	LIN	Provide driver selection inputs to the driver's seat module.	On the outside of the trim panel on the driver's seat.
Air quality sensor	LIN	Measures quality of air entering the vehicle interior.	At the front of the vehicle, behind the air intake grill.
Windshield (defrost) stepper motor	LIN	Moves flaps within the heater assembly to direct air flow to the windshield.	On the heater assembly.
Face/feet stepper motor	LIN	Moves flaps within the heater assembly to direct air flow to instrument panel vents and/or footwell.	On the heater assembly.
LH temperature blend stepper motor	LIN	Moves flaps within the heater assembly to control temperature in LH side footwell.	On the heater assembly.
RH temperature blend stepper motor	LIN	Moves flaps within the heater assembly to direct air flow to RH side footwell.	On the heater assembly.
Electric booster heater	LIN	Controls operation of the electric booster heater.	Inside the heater assembly.
LH outer face level vent	LIN	Controls the operation of the face level vent stepper motor.	In the instrument panel.
LH inner face level vent	LIN	Controls the operation of the face level vent stepper motor.	In the instrument panel.
RH inner face level vent	LIN	Controls operation of the face level vent stepper motor.	In the instrument panel.
RH outer face level vent	LIN	Controls operation of the face level vent stepper motor.	In the instrument panel.
ATC module	LIN	Controls operation of the climate system functions.	In the instrument panel.
Steering wheel audio switches	LIN	Converts analogue signals from steering wheel switches into digital messages.	On the steering wheel.
Steering wheel clockspring	LIN	Passes digital messages from the steering wheel audio switches to the instrument cluster.	Behind the steering wheel, on the upper steering column.
Instrument cluster	LIN	Receives digital signals from other vehicle systems.	On the driver's side of the instrument panel.
Battery backed sounder	LIN	Activated by CJB when alarm trigger is received.	In the LH side of the engine compartment, near the bulkhead.
CJB	LIN	Controls body functions and power distribution.	On the RH 'A' pillar.
RJB	LIN	Controls body functions and power distribution.	On the RH of the luggage compartment.
Battery monitoring system module	LIN	Monitors the condition and charge of the vehicle battery.	On the vehicle battery positive terminal in the luggage compartment.
Intrusion detection module	LIN	Detects movement in the vehicle interior and activates the anti-theft system.	In the front overhead console.
Rain/light sensor	LIN	Detects ambient light levels and moisture on the windscreen for operation of the automatic headlamps and wiper systems.	On the inside of the windshield behind the interior rear view mirror.
Start control module	LIN	Used to identify the Smart Key - component of the keyless start system.	In the lower instrument panel on the driver's side.
Rear view camera	LIN	Passes digital images data from the rear view camera to the RJB	In the luggage compartment lid trim finisher.
Driver's window switch	LIN	Controls operation of the driver's window.	In the driver's door trim panel.
Electronic transmission selector	LIN	Sends selector position to the TCM.	In the floor console.
TCM	LIN	Receives selector position information to control the transmission.	Inside the transmission and accessible by removal of the fluid pan.
Information control module	Media Oriented System Transport (MOST)	Contains controls for the entertainment system and gateway between audio system and other vehicle systems.	In the instrument panel below the integrated control panel.
Integrated control panel	MOST	Contains controls for the entertainment system.	In the instrument panel.
Digital Audio Broadcast (DAB) receiver (SDARS NAS only)	MOST	Receives digital radio broadcasts.	In the LH side of the luggage compartment, above the keyless vehicle module.
Bluetooth® phone module	MOST	Controls operation of the Bluetooth® phone system.	Below the LH front seat, adjacent to the portable audio module.
Amplifier/tuner	MOST	Provides amplification for the entertainment systems and reception of radio RF broadcasts.	In the LH side of the luggage compartment.
Navigation computer	MOST	Reads map data from a DVD (digital versatile disc) to calculate and display visual route guidance information via the TSD and audible guidance via the amplifier to the driver.	In the LH side of the luggage compartment.
Touch Screen Display (TSD)	MOST	Provides the driver interface to the entertainment, navigation and driver personalization functions.	In the center of the instrument panel.
TV tuner	MOST	Controls the reception of television signals and audio/visual inputs.	In the LH side of the luggage compartment.
Portable Audio Module	MOST	Controls the auxiliary inputs for additional audio inputs via the portable audio interface.	Below the LH front seat, adjacent to the Bluetooth® phone module.
MOST diagnostic connector	MOST	Allows for diagnostic fault detection of the MOST ring.	Below the air ducting in the floor console.

Refer to Communications Network section for further details Refer to: Communications Network (Description and Operation).