Most Network
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 can be equipped with either a media player module (MPM) or an integrated audio module (IAM).
When the vehicle is equipped with a media player module (MPM), there are - in addition to the infotainment control module (ICM) - three control modules fitted as standard on the MOST network. These are the audio module (AUD), AM/FM tuner module (AFM) and media player module (MPM).
When the vehicle is equipped with an integrated audio module (IAM), only this, besides the infotainment control module (ICM), is fitted as standard on the MOST network.
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 = accessory installed at the factory 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. |
| AM/FM tuner module (AFM) (3) | Consists of an AM/FM antenna. | Slave module on the MOST network. | Included in the standard setup of the MOST network when the vehicle is equipped with a media player module (MPM). Otherwise, available as an option, accessory. |
| Traffic message channel module (TMC) (4) | Consists of a TMC antenna and a receiver. | Slave module on the MOST network. | Option, accessory. |
| Audio module (AUD) (5) | 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 setup of the MOST network when the vehicle is equipped with a media player module (MPM). Otherwise, available as an option, accessory. |
| Global positioning system module (GPS) (6) | Consists of a GPS antenna. | Slave module on the MOST network. | Option, accessory. |
| Subwoofer module (SUB) (7) | Amplifier and bass speakers integrated in the same unit. | 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. |
| Phone module (PHM) (8) | Controls carphone functions. | Connected to the LS CAN and is a slave module on the MOST network. | Option, accessory. |
| Media player module (MPM) (9) | Available in three versions: CD player, CD changer or combined CD and MD player. | Slave module on the MOST network. | Included in the standard setup of the MOST network when the vehicle is equipped with this control module. |
| Integrated audio module (IAM) (9) | 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 setup of the MOST network when the vehicle is equipped with this control module. |