LOCATION OF CONTROL MODULES ON THE MOST NETWORK
Note. The control modules on the MOST network should be positioned in a particular order. If this order is not followed, the fault-tracing of the MOST network will deteriorate.
When a control module is added to the MOST network, it should be placed in the correct order on the network to make it easier to fault-trace the control modules.
If the control modules are connected in another order, this does not effect the function of the MOST network, but fault-tracing will be more difficult.
The control modules should be placed in the following order
- Infotainment control module (ICM)
- Multimedia module (MMM)
- Audio module (AUD)
- Subwoofer module (SUB)
- Traffic message channel module (TMC)
- Global positioning system module (GPS)
- Phone module (PHM)
- Integrated audio module (IAM)
If the minimum configuration of control modules on the MOST network in the car is used, the following control modules are connected
- Infotainment control module (ICM)
- Integrated audio module (IAM)
Scheme 832
The MOST network can consist of up to eight different control modules.
The infotainment control module (ICM) deals with monitoring and communication on the MOST network. The infotainment control module (ICM) is in turn monitored by the central electronic module (CEM) on the CAN network.
When the vehicle is equipped with the Subwoofer module (SUB), the Infotainment control module (ICM) as well as the Audio module (AUD) are also included as standard on the MOST network.
The simplest variation is when the vehicle is only equipped with an Integrated Audio Module (IAM) and an Infotainment control module (ICM).
The table below lists all the control modules which may be included in the MOST network for the C70.
Explanation
CAN = Controller Area Network, electrical network for communication.
LS CAN = low speed side of the CAN.
MOST = Media Oriented Systems Transport, fiber optic network for communication.
Master control module = Control module which monitors the MOST network.
Slave control module = Control module which supplies the MOST network functions.
Option = Factory installed accessories, during the purchase of a new car.
Accessory = After market installation.
(x) = Position number in the illustration.
| Control module | Function | Communication | Other |
|---|---|---|---|
| Infotainment control module (ICM) (1) | Monitors the MOST network. | Master control module, connected to both the LS CAN and the MOST network | Included in the standard set-up of the MOST network. Must be connected to the MOST network to function. |
| Multimedia module (MMM) (2) | Displays traffic information on the directly connected display screen. | Slave module on the MOST network. | Option, accessory. |
| Audio module (AUD) (3) | Amplifier to which all loudspeakers except the subwoofer module (SUB) are connected. The microphone is also directly connected to this control module. | Slave module on the MOST network. | Included in the standard set-up of the MOST network when the vehicle is equipped with a Subwoofer module (SUB) or a Global positioning system module (GPS). Otherwise option, accessories. |
| Subwoofer module (SUB) (4) | There are two bass loudspeakers located behind the rear seat backrest. | Slave module on the MOST network. | Option, accessory. The audio module (AUD) must be connected to the MOST network for the subwoofer module (SUB) to function. |
| Traffic message channel module (TMC) (5) | Consists of a TMC antenna and a receiver. | Slave module on the MOST network. | Option, accessory. |
| Global positioning system module (GPS) (6) | Consists of a GPS antenna. | Slave module on the MOST network. | Option, accessory. |
| Phone module (PHM) (7) | Controls carphone functions. | Connected to the LS CAN and is a slave module on the MOST network. | Option, accessory. |
| Integrated audio module (IAM) (8) | Available in three versions: CD player, CD changer or combined CD and MD player. Has its own AM/FM aerial. The performance model has 4 loudspeakers. For the High performance and Premium models, the audio module (AUD) is required. | Slave module on the MOST network. | Included in the standard set-up of the MOST network. |
Note. The control modules on the MOST network should be positioned in a particular order. If this order is not followed, the fault-tracing of the MOST network will deteriorate.
When a control module is added to the MOST network, it should be placed in the correct order on the network to make it easier to fault-trace the control modules.
If the control modules are connected in another order, this does not effect the function of the MOST network, but fault-tracing will be more difficult.
The control modules should be placed in the following order
- Infotainment control module (ICM)
- Multimedia module (MMM)
- Audio module (AUD)
- Subwoofer module (SUB)
- Traffic message channel module (TMC) / Remote Digital Audio Receiver (RDAR)
- Global positioning system module (GPS)
- Phone module (PHM)
- Integrated Audio Module (IAM)
Scheme 833
The MOST network can consist of up to nine different control modules.
The infotainment control module (ICM) deals with monitoring and communication on the MOST network. The infotainment control module (ICM) is in turn monitored by the central electronic module (CEM) on the CAN network.
The vehicle is always equipped with an Infotainment control module (ICM) and Integrated Audio Module (IAM).
In addition to these two, one or more control modules is/are connected to the MOST loop to obtain the desired functions in the vehicle.
The table below lists all the control modules which may be included in the MOST network.
Explanation
CAN = Controller Area Network, electrical network for communication.
LS CAN = low speed side of the CAN.
MOST = Media Oriented Systems Transport, fiber optic network for communication.
Master control module = Control module which monitors the MOST network.
Slave control module = Control module which supplies the MOST network functions.
Option = Factory installed accessories, during the purchase of a new car.
Accessory = After market installation.
| Control module | Function | Communication | Other |
|---|---|---|---|
| Infotainment control module (ICM) | Monitors the MOST network. | Master control module, connected to both the LS CAN and the MOST network | Included in the standard set-up of the MOST network. Must be connected to the MOST network to function. |
| Multimedia module (MMM) | Displays traffic information on the directly connected display screen. | Slave module on the MOST network. | Option, accessory. The global positioning system module (GPS) must be connected to the MOST network for the Multimedia module (MMM) to work. |
| Traffic message channel module (TMC) | Consists of a TMC antenna and a receiver. | Slave module on the MOST network. | Option, accessory. Only EU. The Global positioning system module (GPS) and Multimedia module (MMM) must be connected to the MOST network for the Traffic message channel module (TMC) to work. |
| Remote Digital Audio Receiver (RDAR) | Receives and decodes digital radio signals. Has a directly connected antenna. | Slave module on the MOST network. | Option, accessory. Only USA/CDN. |
| Audio module (AUD) | Amplifier to which all speakers except the subwoofer module (SUB) are connected. | Slave module on the MOST network. | Option, accessory. Included in sound systems High Performance and Premium Sound. |
| Subwoofer module (SUB) | Amplifier and bass speakers integrated in the same unit. | Slave module on the MOST network. | Option, accessory. S40/V50/C70 only. The audio module (AUD) must be connected to the MOST network for the subwoofer module (SUB) to function. |
| Global positioning system module (GPS) | Consists of a GPS antenna. | Slave module on the MOST network. | Option, accessory. |
| Phone module (PHM) | Controls carphone functions. | Connected to the LS CAN and is a slave module on the MOST network. | Option, accessory. The audio module (AUD) must be connected to the MOST network for the Phone module (PHM) to function. |
| Integrated Audio Module (IAM) | Has its own AM/FM aerial. The performance model has 4 loudspeakers. For the High performance and Premium Sound models, the audio module (AUD) is required. | Slave module on the MOST network. | Included in the standard set-up of the MOST network. |
Note. The control modules on the MOST network should be positioned in a particular order. If this order is not followed, troubleshooting of the MOST network will be more difficult.
When a control module is added to the MOST network, it should be placed in the correct order on the network to make it easier to fault-trace the control modules.
If the control modules are connected in another order, this does not effect the function of the MOST network, but fault-tracing will be more difficult.
The control modules should be placed in the following order
- Infotainment control module (ICM)
- Multimedia module (MMM)
- Audio module (AUD)
- Subwoofer module (SUB)
- Remote Digital Audio Receiver (RDAR)
- Phone module (PHM)
- Integrated audio module (IAM)
- Accessory USB unit (AUU)
Scheme 834
The MOST network can consist of up to nine different control modules.
The infotainment control module (ICM) deals with monitoring and communication on the MOST network. The infotainment control module (ICM) is in turn monitored by the central electronic module (CEM) on the CAN network.
The vehicle is always equipped with an Infotainment control module (ICM) and Integrated Audio Module (IAM).
In addition to these two, one or more control modules is/are connected to the MOST loop to obtain the desired functions in the vehicle.
The table below lists all the control modules which may be included in the MOST network.
Explanation
CAN = Controller Area Network, electrical network for communication.
LS CAN = low speed side of the CAN.
MOST = Media Oriented Systems Transport, fiber optic network for communication.
Master control module = Control module which monitors the MOST network.
Slave control module = Control module which supplies the MOST network functions.
Option = Factory installed accessories, during the purchase of a new car.
Accessory = After market installation.
| Control module | Function | Communication | Other |
|---|---|---|---|
| Infotainment control module (ICM) | Monitors the MOST network. | Master control module, connected to both the LS CAN and the MOST network | Included in the standard set-up of the MOST network. Must be connected to the MOST network to function. |
| Multimedia module (MMM) | Displays traffic information on the directly connected display screen. | Slave module on the MOST network. | Option, accessory. The global positioning system module (GPS) must be connected to the MOST network for the Multimedia module (MMM) to work. |
| Remote Digital Audio Receiver (RDAR) | Receives and decodes digital radio signals. Has a directly connected antenna. | Slave module on the MOST network. | Option, accessory. Only USA/CDN. |
| Audio module (AUD) | Amplifier to which all speakers except the subwoofer module (SUB) are connected. | Slave module on the MOST network. | Option, accessory. Included in sound systems High Performance and Premium Sound. |
| Subwoofer module (SUB) | Amplifier and bass speakers integrated in the same unit. | Slave module on the MOST network. | Option, accessory. S40/V50/C70 only. The audio module (AUD) must be connected to the MOST network for the subwoofer module (SUB) to function. |
| Phone module (PHM) | Controls carphone functions. | Connected to the LS CAN and is a slave module on the MOST network. | Option, accessory. The audio module (AUD) must be connected to the MOST network for the Phone module (PHM) to function. |
| Integrated audio module (IAM) | Has its own AM/FM aerial. The performance model has 4 loudspeakers. For the High performance and Premium Sound models, the audio module (AUD) is required. | Slave module on the MOST network. | Included in the standard set-up of the MOST network. |
| Accessory USB unit (AUU) | Enables listening to the customer's portable media players in the vehicle's speaker system via USB-port. | Slave module on the MOST network. | Option, accessory. |
Note. The control modules on the MOST network should be positioned in a particular order. If this order is not followed, the fault-tracing of the MOST network will deteriorate.
When a control module is added to the MOST network, it should be placed in the correct order on the network to make it easier to fault-trace the control modules.
If the control modules are connected in another order, this does not effect the function of the MOST network, but fault-tracing will be more difficult.
The control modules should be placed in the following order (applies to the C70)
- Infotainment control module (ICM)
- Multimedia module (MMM)
- Audio module (AUD)
- Subwoofer module (SUB)
- Remote Digital Audio Receiver (RDAR)
- Phone module (PHM)/ Bluetooth phone module (BPM)
- Integrated Audio Module (IAM)
- Accessory USB unit (AUU)
Scheme 835
A DVD player is integrated in the multimedia module (MMM). The DVD player is used to read DVDs with road maps. The control module has various user functions such as
- the start menu
- navigation
- system settings.
The start menu displays all the functions available to the user on the screen.
The multimedia module (MMM) also has an integrated three dimensional piezo-electrical gyro. This supplies information about the movements of the vehicle, such as any turns taken.
Information used from other nodes for navigation are
- the wheel rotation counter from the brake control module (BCM)
- the back-up gear position from the transmission control module (TCM) and central electronic module (CEM)
- the vehicle speed signal from the central electronic module (CEM).
Information from these control modules is transmitted to the infotainment control module (ICM) which then transmits the information onwards to the multimedia module (MMM).
The map displayed on the screen indicates the position of the car. This position is calculated using information from
- the wheel rotation counter
- the vehicle speed signal
- the gyro in the multimedia module (MMM)
- the back-up gear position
- the global positioning system module (GPS)
- the map matching function.
Information from the gyro and wheel rotation counter can be used for dead reckoning (i. e. to calculate the position). This happens for example when communication with the GPS satellites is lost such as when traveling through a tunnel.
The multimedia module (MMM) receives traffic information messages (TMC) from the traffic message channel module (TMC) via the MOST network. This information is displayed on the directly connected display screen. TMC (Traffic Message Channel) is a standardized code system for traffic messages giving information about road repairs, traffic queues etc. The Japanese equivalent of TMC is called FM multiplex. There is no corresponding system in the U. S. A.
The navigation function of the multimedia module (MMM) also includes voice guiding which instructs the driver how to reach the set destination.
The user can configure certain functions in the system settings. These functions are
- date and time
- user settings, such as password.
The following functions are displayed on the directly connected display screen
- navigation.
The control module transmits all the signals required to control the display screen.
Multimedia module (MMM) uses the Windows CE operating system.
Scheme 836
Functions such as system settings and navigation are presented on a 6.5" display screen in the center of the dashboard. The display screen is directly connected to the multimedia module (MMM). The control module transmits all the signals required to control the display screen.
If there is an internal fault in the screen or faults in communication with the control module, the quality of the display on the screen will deteriorate or the screen will stop working completely. A simple way to detect a fault in the screen, or communication problems between the screen and the control module, is to check the appearance of the image on screen.
The menu system on the display screen can be controlled either using the navigation buttons on the reverse of the steering wheel or using the screen remote control. The infra-red receiver for the remote control is in the loudspeaker grille on the dashboard.