Module Controlled Functions - Description & Operation: Introduction

The vehicle electrical system consists of a number of control modules connected via two multiplexed CAN busses Refer to Communications Network article. The Instrument cluster acts as a gateway between the two CAN bus systems.

Lower speed control modules use a Local Interconnect (LIN) 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 protocol for transmission of data and audio to the relevant components of the audio system.

Module	Bus System	Function	Location
ECM	HS CAN	Controls the engine in response to various sensor inputs.	Front LH side in engine compartment adjacent to bulkhead.
ABS	HS CAN	Controls the braking force applied to the road wheels.	In the engine compartment next to the ECM.
Instrument cluster	HS CAN and MS CAN LIN Bus.	Gateway between High speed and Medium speed CAN, Gateway between the CAN busses and the LIN bus	On the drivers 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 post below the CJB.
Navigation computer	MOST, GVIF	Route guidance out put based on inputs from GPS satellites and driver destination.	In the luggage compartment to the right of battery.
RCM	MS CAN.	Controls the deployment of supplementary restraint components.	On the transmission tunnel between the seats under the trim.
Tire Pressure Monitoring System (TPMS) module	MS CAN.	Monitors the vehicle tires to warn of deflation.	Behind the rear seats next to the Auxiliary Junction Box.
TCM	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 foot well mounted against inner bulk head.
Adaptive speed control module	HS CAN.	Controls vehicle road speed in relation to other vehicles when in speed control mode.	At the bottom of the RH A post.
CJB	MS CAN.	Controls body functions and power distribution.	In the passenger compartment LH side on the A post.
Auxiliary junction box	MS CAN.	Controls body functions and power distribution.	In the center behind the backrest of the rear passenger seat.
Active Damping Control Module (ADCM)	HS CAN.	Controls the adjustment of the dampers.	Behind the backrest of the RH rear passenger seat.
Electric park brake module	HS CAN.	Controls the application and release of the parking brake.	Behind the auxiliary junction box.
Air conditioning 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 Touch Screen Display and above the integrated audio unit.
Drivers 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 Touch Screen Display.
Drivers 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' Post.
L Gate	MS CAN.	Electronic control of the selected gear/driving mode.	On top of the transmission tunnel.
Key Start Control Module	LIN Bus		In the center console.
Pedestrian Protection System module	HS CAN.	Control and monitoring of Pedestrian Protection System	On the RH side under the wheel arch liner at the top of the wheel arch.