Subject: RECODE THE CAR - read below Author: kiwijochen : member since June, 2006 : 2163 posts Posted on: 2008-08-23 18:23:39

Design of MOST network
The MOST network is a bus for transmitting picture and audio data. In the E65, only audio data and control commands are transmitted. Bus communication functions in one direction. The control units are connected in series in the bus. The bus has a ring structure. If the temperature exceeds 70 °C in a device in the network, the Control Display indicates that the corresponding functions are no longer available. The entire MOST bus is powered down if the temperature exceeds 85 °C. Only the Control Display recognises the current application and its parameters such as the volume setting for listening to the radio. The Audio System Controller stores information regarding which control units are installed. This list of equipment can be called up in the Service menu of the Control Display. The equipment cannot be called up if the ring is interrupted. The Audio System Controller manages the audio sources by making available internal channels for outputting and by outputting the individual channel after being prompted by the Control Display. If the optional extra TOP Hi-Fi is fitted, the audio low frequency is recalculated prior to output and the improved audio low frequency is output.

MOST bus
The MOST (Media Oriented Systems Transport) network uses a ring bus for data communication between the various control units. Signal transmission is by means of fibre-optic cable. Data transmission on the ring bus takes place in one direction only. On the MOST network, messages can only be transmitted provided the bus ring is complete and fully functional. If there is a ring fault in the MOST network, however, the diagnosis system can only communicate with the instrument cluster and the Control Display. This is possible because those two control units are directly connected to the K-CAN SYSTEM bus.

If, for example, the power supply or the diode of a control unit is defective, it is no longer possible to communicate with the control units on the MOST bus. Exceptions here are of course the instrument cluster and the Control Display.

Save MOST ring configuration
This function determines the current configuration of the MOST ring, compares it with the vehicle order, and then saves it in the Audio System Controller.

CAUTION!

This function may only be run with a closed and complete started ring.

To save the MOST configuration correctly, the OPPS/OPS must not be connected to the MOST direct access point. If this is the case, remove the OPPS/OPS from the MOST ring and close the MOST ring with the original MOST direct access point in the vehicle.

Performance in event of ring break
If the MOST functions cannot be executed, this may be because of the following reasons:

No function can be selected - Fibre-optic cable interrupted, Voltage supply of at least one control unit interrupted, Serious software conflict of at least one control unit

Chosen functions cannot be selected - Severe software conflict of the control unit associated with the function

No function, note on excessive temperature - At least one function has shut down due to excessive temperature

• URGENT Need Help on changing stock MD player to CD player for E65730i 2002 - highendcar 2008-08-23 04:55:27 (179 views)
  • You need to reset or recode the car. - kiwijochen 2008-08-23 12:54:15 (185 views)
    • Re: You need to reset or recode the car. - highendcar 2008-08-23 14:52:42 (190 views)
      • RECODE THE CAR - read below - kiwijochen 2008-08-23 18:23:39 (228 views)
        • Re: RECODE THE CAR - read below - highendcar 2008-08-24 03:55:49 (199 views)
          • Yes. - kiwijochen 2008-08-24 04:33:42 (152 views)
            • Re: Yes. - highendcar 2008-08-24 06:09:36 (152 views)
              • Of course I cannot - kiwijochen 2008-08-26 02:56:31 (160 views)
                • No radio reception - devak888 2008-10-01 07:26:22 (144 views)
                  • Re: No FM Radio recepetion, TV or Nav Prcture, - devak888 2008-10-12 20:52:47 (134 views)