CCC/MASK
E60 series vehicles are fitted with either the CCC or the MASK. Either of these control modules are the interface between the MOST bus and the K-CAN.
To diagnose the CCC or MASK
- CCC (Car Communication Computer) all the control modules with the abbreviation CCC must be selected (e.g. CCC-GW).
- MASK (Multi Audio System Controller) all the control modules the the abbreviation MASK must be selected (e.g. MASK-GW).
MOST Configuration
On the E60, certain control units are always arranged in the same order.
Other control units, on the other hand, can be connected in a different sequence.
Same Sequence
Depending on the equipment configuration, the multi-audio system controller/car communication computer is always followed by the CDC, HUD and then the MOST bus terminal.
Different Sequence
The sequence can change as from the MOST bus terminal. Possible control units include
- Top HiFi amplifier.
- Telephone.
- Video module.
From the MOST bus terminal, the fibre-optic cable is routed back via the flash plug to the multi-audio system controller/car communication computer.
Store Configuration
On the E60, the sequence of control units in the MOST system network is identical in the front area of the vehicle. All control units located in the luggage compartment can be connected to the MOST bus terminal in any arbitrary order so that the sequence of the control units can change.
Diagnosis on the MOST bus is only possible over a known sequence of control units in the MOST. When storing the MOST ring configuration, the control units are written in their installed sequence to a registration file. It is first necessary to check whether communication on the MOST bus is possible (stability check).
The configuration is automatically restored after replacing or retrofitting a control unit in the MOST system network. This takes place after programming/encoding with CIP so that the control unit sequence is up-to-date.
The "Store configuration" function is not activated automatically when the control units sequence is changed manually in the area of the luggage compartment (e.g. accident damage repair).
MOST control unit sequence, E60
Scheme 1
Stability Check
On the E60, the antenna tuner and the audio system controller are located in one unit.
The radio is still operable in the stereo and in the HiFi system in the event of a communication fault in the MOST system network. The stability check module was introduced for the purpose of checking the MOST bus in such cases.
Effective operation of the MOST bus on the E60 can be checked with the stability check function.
MOST Control Unit Supply
The "MOST control unit supply" module makes available schematic circuit diagrams and information on the power supply of the MOST control units so that specific information is quickly available as required.
Creating Images
The control display (CD) contains two control units, i.e. the CD gateway that establishes the connection to the other bus systems and the CD graphics stage that builds up the graphics in the control display. Not all images in the CD are created by the CD graphics stage. All basic menus, submenus and the status line are created by the graphics stage (blue). The map is presented by the navigation computer via RGB lines (red).
Consequently
If only the map is not displayed but the rest, e.g. the on-board computer, is still visible and if other menus can still be selected via the controller, in all probability the fault will be in the area of the navigation system.
| IMPORTANT | The navigation map can also be displayed on the left-hand side. |
Non-Digitized Area
A road map DVD, on which an area is not completely digitized can cause the navigation screen to turn green.
Self-Burnt DVDs
A self-burnt or faults road map DVD can cause the navigation computer to crash. Also a defective computer can trigger a reset of the navigation system, indicating "Initialization running" in the control display.
Telephone E65
The telephone AF is routed via the MOST bus in the form of light signals to the ASK. The light is converted in the ASK and the AF is output from the speakers by means of a hardwired electrical signal.
The microphone is connected via copper cables directly to the telephone control unit. Even if an SVS is installed, it does not have anything directly to do with hands-free telephone operation.
SVS is activated when voice commands are executed. The cause of a fault in hands-free operation should be sought in the area of the microphone, telephone and ASK.
If the telephone PIN is necessary after failure of the MOST bus, this indicates that the telephone control unit triggered a reset and in all probability the fault can be rectified by replacing the telephone control unit.
If the MOST bus is blocked, a telephone conversation via the cordless keypad handset should still be possible provided the telephone itself is not defective.
Audio
The two models E60 and E65 differ considerably in the area of the audio systems. These design differences necessitate different assessment methods for the purpose of locating faults.
The ASK is responsible for audio output on the E65. If the vehicle is equipped with a Top HiFi amplifier, the audio signal is sent in the form of a light signal from the audio source to the Top HiFi amplifier and forwarded to the speakers as an electrical signal.
Some of the speakers are activated directly by the ASK and some by the Top HiFi amplifier (LOGIC 7).
If the E65 is equipped with a HiFi amplifier, the sound information is transferred hardwired to the amplifier.
In connection with the Top HiFi system on the E60, all sound signals are routed from the multi-audio system controller/car communication computer in the form of light signals to the Top HiFi amplifier.
No sound signals are transmitted along fibre-optic cables in connection with the stereo and HiFi systems. The multi-audio system controller/car communication computer itself is responsible for the control of the speakers.
Byteflight
As already in the E65 and E85, the byteflight is used in the safety system on the E60/E63. The system was adapted to the specific requirements of the vehicle.
The star-shaped arrangement of the satellites about the SGM (safety and gateway module) is a characteristic feature for the byteflight. The data are transmitted by means of light signals.
Light Attenuation
The maximum permissible light attenuation in the byteflight is -20 dB. Values between -3 dB and -8 dB are normally measured in the system. Different methods of contacting must be used depending on the light section to be measured in the system.
