Communication System
Communication System
=> [ Communication System ]
=> [ On Board Diagnostic ]
=> [ Fiber Optic MOST-Bus ]
Communication System
General Information
The components of the systems Radio (R)/Navigation System with CD Drive Control Module (J401)/Media Player, Position 1 (R118)/Digital Sound System Control Module (J525)/Data Bus On Board Diagnostic Interface (J533) are combined with one another in a "ring". This "ring" represents the optical MOST-Bus.
The connection to the other BUS systems in the vehicle are performed by the Data Bus On Board Diagnostic Interface (J533).
The "central control module" is the Front Information Display Control Head Control Module (J523). The transfer of signals representing the instrument cluster display occurs via the MOST-Bus to Data Bus On Board Diagnostic Interface (J533) and from there via CAN-Bus (instrument cluster) to the instrument cluster.
Fault finding is performed via "Guided Fault Finding" using.
Information on optical MOST-Bus
In addition to the CAN-Bus systems, an optical data-bus system has been implemented.
Data exchange of the systems Radio (R)/Digital Sound System Control Module (J525)/ CD Changer (R41)/Navigation System with CD Drive Control Module (J401)/Data Bus On Board Diagnostic Interface (J533) occurs via the MOST-Bus.
A fiber optic cable is utilized as the "connecting cable".
Fiber optic cables are routed inside corrugated tubes for protection.
Ensure that harness connector end faces are not soiled.
If harness connectors are disconnected: Install Protective Cap For Cable Connector (VAS 6223/9) - 1 -.
Fiber optic cables cannot be repaired, they must be replaced completely.
Observe the minimum bending radius of 25 mm when routing fiber optic cables. Fiber optic cables must not be pinched or bent.
On Board Diagnostic
The individual Communication systems have extensive On Board Diagnostic (OBD) capabilities.
In the event that malfunctions occur in any Communication system, troubleshooting is performed using the in the " Guided Fault Finding" operating mode.
Fiber Optic MOST-Bus
In addition to the CAN-Bus systems, a fiber optic data-bus system has been implemented.
Data exchange of Radio (R)/Digital Sound System Control Module (J525)/TV Tuner (R78)/Media Player, Position 1 (R118)/Media Player, Position 2 (R119)/ Telephone Transceiver (R36), Navigation System with CD Drive Control Module (J401)/Chip Card Reader Control Module (J676)/Data Bus On Board Diagnostic Interface (J533) systems occurs via the fiber optic MOST-Bus.
A fiber optic cable is utilized as the "connecting cable".
Fiber optic cables are routed inside corrugated tubes for protection.
Ensure that harness connector end faces are not soiled.
If harness connectors are disconnected: Install Protective Cap For Cable Connector (VAS6223/9) - 1 -.
Fiber optic cables cannot be repaired, they must be replaced completely.
Observe the minimum bending radius of 25 mm when routing fiber optic cables. Do not pinch or bend fiber optic cables.