OVERVIEW
The vehicle electrical system comprises a number of control modules which are interconnected via several network systems.
The following network systems are used on the vehicle
- High Speed Controller Area Network bus
- Medium speed CAN bus
- Local Interconnect Network (LIN) bus
- Media Orientated Systems Transport (MOST) system.
The CJB 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 system. The MOST system 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 |
|---|---|---|---|
| CJB | High speed CAN bus | Controls body functions and power distribution | Passenger footwell, behind glovebox |
| Steering angle sensor | High speed CAN bus | Transmits steering positional information | Integral with the steering wheel clockspring |
| Diagnostic socket | High speed CAN bus | Allows the transfer of vehicle information using IDS or other diagnostic tool | Driver's footwell on underside of instrument panel |
| RCM | High speed CAN bus | Controls deployment of supplementary restraint components | Rear of center console, below arm rest |
| TCM | High speed CAN bus | Controls automatic transmission operation | Mounted on the top of the transmission housing |
| ECM | High speed CAN bus | Controls engine management and fuel system operation | Mounted between the bulkheads in the engine compartment |
| ABS module | High speed CAN bus | Controls all aspects of the braking system | Mounted between the bulkheads on LH side of engine compartment |
| Headlamp levelling module | High speed CAN bus | Controls the dynamic headlamp levelling function | Passenger footwell, behind the glovebox |
| Occupant classification sensor (NAS only) | High speed CAN bus | Detects when a passenger is in the front passenger seat | Underside of passenger seat |
| Terrain Response module | High speed CAN bus | Controls the Terrain Response system using data from other vehicle systems | Integral with Terrain Response rotary control |
| Electronic differential control module | High speed CAN bus | Controls the operation of the electronic differential | Mounted on front of rear differential |
| CJB | Medium speed CAN bus | Controls body functions and power distribution | Passenger footwell, behind glovebox |
| Fuel fired heater module | Medium speed CAN bus | Controls operation of the fuel fired heater | Integrated with the ATC module |
| Diagnostic socket | Medium speed CAN bus | Allows the transfer of vehicle information using IDS or other diagnostic tool | Driver's footwell on underside of instrument panel |
| Passenger door module | Medium speed CAN bus | Controls window and locking functions | Mounted in passenger door |
| Parking aid module | Medium speed CAN bus | Controls parking aid system | Mounted on LH rear suspension turret |
| Seat memory module | Medium speed CAN bus | Controls driver seat positioning and also memory functions of other driver personalized functions | Under driver's seat |
| Trailer module | Medium speed CAN bus | Controls operation of trailer lamps and also informs CJB that trailer connected | LH side of luggage compartment, behind suspension turret |
| Instrument cluster/Driver Information Module | Medium speed CAN bus | Receives data from other systems to provide driver information | Instrument panel |
| Driver's door module | Medium speed CAN bus | Controls window and locking functions | Mounted in driver's door |
| ATC module | Medium speed CAN bus | Contains controls for the heating and air conditioning systems | Mounted in center console |
| Integrated Control Module | Medium speed CAN bus | Contains controls for the entertainment system and gateway between audio system and other vehicle systems | Integral part of head unit, located in center console |
| Integrated Head Unit (IHU) | Medium speed CAN bus | Contains controls for the entertainment system | Integral part of head unit, located in center console |
| RH rear door module | LIN | Controls window and locking operation | Mounted in RH rear door |
| LH rear door module | LIN | Controls window and locking operation | Mounted in LH rear door |
| Generator | LIN | Provide load signal to ECM | Located in engine compartment. Location on engine dependent on engine fitting. |
| RH front seat heat module | LIN | Used by ATC to control seat heater temperature | Underside of seat |
| LH front seat heat module | LIN | Used by ATC to control seat heater temperature | Underside of seat |
| Air quality sensor | LIN | Measures air quality in the vehicle interior | Fitted to the heater assembly |
| Flap actuator module 1 | LIN | Moves flaps within the heater assembly to direct air flow to different parts of the interior | Part of the heater assembly |
| Flap actuator module 2 | LIN | Moves flaps within the heater assembly to direct air flow to different parts of the interior | Part of the heater assembly |
| Flap actuator module 3 | LIN | Moves flaps within the heater assembly to direct air flow to different parts of the interior | Part of the heater assembly |
| Flap actuator module 4 | LIN | Moves flaps within the heater assembly to direct air flow to different parts of the interior | Part of the heater assembly |
| Flap actuator module 5 | LIN | Moves flaps within the heater assembly to direct air flow to different parts of the interior | Part of the heater assembly |
| Humidity sensor | LIN | Measures air quality in the vehicle interior | Integral with the interior rear view mirror |
| HVAC control module | LIN | Controls operation of the HVAC system functions | Integral with HVAC controls panel in center console |
| Steering wheel module | LIN | Converts analogue signals from steering wheel switches into digital messages | Behind steering wheel clockspring |
| Battery backed sounder | LIN | Activated by CJB when alarm trigger is received | Mounted in a central position between the bulkheads in the engine compartment |
| Electric steering column lock | LIN | Controls the locking and unlocking of the steering column | On underside of steering column, under lower column shroud |
| CJB | LIN | Control body functions and power distribution | Passenger footwell, behind glovebox |
| Light switch module | LIN | Control of headlamp operation and levelling | Driver's side of instrument panel |
| Volumetric sensor | LIN | Detects movement in vehicle interior and activates anti-theft alarm system | In housing in center of headlining |
| Rain sensor module | LIN | Detects moisture on the windshield | At top of windshield |
| Start control unit | LIN | Used to identify the remote handset - component of the keyless start system | In instrument panel, adjacent to the steering column |
| RF receiver | LIN | Receives RF transmissions from the TPMS system and the remote handset | Positioned adjacent to the rear interior lamp, behind the headlining |
| Headlamp levelling module | LIN | Controls the dynamic headlamp levelling functions | Passenger footwell, behind glovebox, integral with headlamp levelling module |
| RH headlamp | LIN | Provides positional information to the headlamp levelling module | Attached to the headlamp assembly |
| LH headlamp | LIN | Provides positional data to the headlamp levelling module | Attached to the headlamp assembly |
| Driver's window switch | LIN | Controls operation of the driver's window | Mounted in driver's door |
| Driver's door module | LIN | Controls window and locking functions | Mounted in driver's door |
| Passenger door module | LIN | Controls window and locking functions | Mounted in passenger door |
| Transmission selector lever module | LIN | Sends selector lever position to the TCM | Located below center console |
| TCM | LIN | Receives selector lever position information to control transmission operation | Mounted on the top of the transmission housing |
| Integrated Control Module | MOST | Contains controls for the entertainment system and gateway between audio system and other vehicle systems | Integral part of head unit, located in center console |
| Integrated Head Unit | MOST | Contains controls for the entertainment system | Integral part of head unit, located in center console |
| Digital Audio Broadcast (DAB) receiver | MOST | Receives digital radio broadcasts | Mounted in LH side of the luggage compartment |
| Bluetooth phone module | MOST | Controls the operation of the Bluetooth phone system | Mounted in RH side of the luggage compartment |
| Amplifier/Tuner | MOST | Provides amplification for the entertainment systems and reception of radio RF broadcasts | Mounted in RH side of the luggage compartment |
| Navigation computer | MOST | Reads map data from a DVD to calculate and display visual route guidance information via the TAD and audible guidance via the amplifier to the driver | Below the IHU in the center console |
| Touch Screen Display (TAD) | MOST | Provides the driver interface to the entertainment, navigation and driver personalization functions | Above the IHU in the center console |
DESCRIPTION AND OPERATION
For a detailed description of the multifunction electronic control modules, refer to the relevant Description and Operation workshop information.
See Module Controlled Functions .