Control Modules In Most Network: Most-Network
The MOST network can consist of up to seven 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.
From the Infotainment Control Module (ICM), the Integrated Audio Module (IAM) is included 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 = Factory installed accessories, during the purchase of a new car.
Accessory = After market installation.
| Control module | Function | Communication | Miscellaneous |
| 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. |
| 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. |
| 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. |
| 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. |
| Multimedia module (MMM) | Displays traffic information on the directly connected display screen. GPS receiver for determining the position of the vehicle. | Slave module on the MOST network. | Option, accessory. |
| Global positioning system module (GPS) | Calculates the vehicle's position using a GPS signal. Has directly connected GPS antenna. | Slave module on the MOST network. | Option, accessory. The global positioning system module (GPS) is only connected if the vehicle is equipped with telematics but does not have a Multimedia module (MMM). |
| 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. Applies from and incl. structure week 200709. |
| Subwoofer module (SUB) | 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. |