GF82.85-P-3136RD Component Description For COMAND Controller Unit

GF82.85-P-3136RD Component Description For COMAND Controller Unit
MODEL 172.4
- with CODE (512) COMAND APS with DVD changer
- with CODE (527) COMAND APS with single DVD drive (with navigation)





Shown with code (512) COMAND APS with DVD changer
A40/3 COMAND control unit

Location
The COMAND controller unit is located in the center console.

Task
The COMAND controller unit fulfills the following tasks:
^ Central operating unit for the entertainment and communication systems integrated into the vehicle
^ Reading in the controls and input signals
^ Evaluation of input factors
^ Activation of output media and system components

Central operating unit for the entertainment and communication systems integrated into the vehicle
The COMAND controller unit provides the user with a structured and uniform interface for the following system components:
- Audio
- Radio
- CD/DVD audio
- Secure Digital (SD) memory card
- USB electrical connector (X115) in stowage compartment (telephone compartment) under the center armrest
- AUX connection electrical connector (X39/45) in stowage compartment (telephone compartment) under the center armrest, for external audio equipment (without code (518) Media interface)
- Music Register
- Secure Digital (SD) memory card
- Bluetooth(R) Audio
- Video
- Video DVD
- TV (with code (498) Japan version)
- Media interface for external audio or mass storage devices (with code (518) Media interface)
- Internet (COMAND Online) (except code (359) TELEAID emergency call system
- Cellular telephone
- Navigation (map navigation with data from internal hard disk)
- Voice control system (VCS [SBS])

Reading in the controls and input signals
The input factors are read in via the following connections:
^ Controller Area Network (data bus/CAN bus) (CAN)
^ Media Oriented System Transport (MOST)
^ Direct line

Controller Area Network (data bus/CAN bus) (CAN)
- The COMAND controller unit is a telematics CAN (CAN A) subscriber.
- The COMAND controller unit is an interior CAN (CAN B) subscriber.

Media Oriented System Transport (MOST)
The COMAND controller unit receives control and audio signals from the following control units:
- Sound system amplifier control unit (N40/3) (with code (810) Sound system)
- Digital Audio Broadcasting control unit (N87/3) (with code (537) Digital radio)
- Satellite Digital Audio Radio (SDAR) control unit (N87/5) (with code (536) SIRIUS satellite radio)
- Media interface control unit (N125/1) (with code (518) Media interface)
- TV digital tuner (with code (498) Japan version)

Direct line
The COMAND controller unit has the following direct connections:
- Circuit 30g
- Circuit 31
- Wake-up for MOST
- AUX electrical connection (access in stowage compartment (telephone compartment) under the center armrest) (without code (518) Media Interface)
- USB electrical connector in stowage compartment (telephone compartment) under the center armrest
- Audio mute (with code (348) Emergency call/Assist system or with code (359) TELEAID emergency call system)
- GPS antenna (A2/23) (with code (508) Navigation box preinstallation, with code (509) Navigation box, with code (512) COMAND APS with DVD changer, with code (527) COMAND APS with single DVD drive (with navigation) and except code (348) Emergency call/Assist system, except code (359) TELEAID emergency call system, except code (386) Comfort telephony, except code (536) SIRIUS satellite radio)
- FM, AM and CL [ZV] antenna amplifier (A2/18)
- FM 2, DAB and TV 3 antenna amplifier (A2/19)
- Bluetooth(R) antenna (A2/91)
- Multifunction antenna (A28/11) (with code (348) Emergency call/ Assist system, with code (359) TELEAID emergency call system, with code (386) Comfort telephony or with code (536) SIRIUS satellite radio)
- Inside rearview mirror microphone (A67b1)
- Y-brightness (luminance)/C-color information (chrominance) (Y/ C) lines from TV digital tuner (A90/3) (with code (498) Japan version)
- Composite Video Baseband Signal (CVBS) from the media interface electrical connector (X18/70) (with code (518) Media interface)
- External fan diagnosis
- VICS control unit (A2/37) (with code (498) Japan version, Dealer Option)
- Electronic Toll Collection control unit (A50/3) (with code (498) Japan version, Dealer Option)

Evaluation of input factors
The input values are processed in the COMAND controller unit.

Activation of output media and system components
- Audio output (direct to speakers) (without code (810) Sound system)
- Video output: Low voltage differential signaling (LVDS) line transmits picture and video signals from the COMAND controller unit to the Audio/COMAND display (A40/8)
- COMAND fan motor (M4/13) (power supply, speed control and diagnosis)
- Microphone output to emergency call system control unit (N123/4) (with code (348) Emergency call/Assist system or with code (359) TELEAID emergency call system)
- VICS control unit (switching voltage) (with code (498) Japan version)
- Electronic Toll Collection control unit (controller) (with code (498) Japan version)
When digital radio is active (DAB) (with code (537) Digital radio) the COMAND control unit transmits received FM signals to the Digital Audio Broadcasting control unit via MOST at the same time.

Design





Shown on COMAND controller unit with code (512) COMAND APS incl. DVD changer
1 Left operating panel
2 Right operating panel
3 "ON" button
4 CD/DVD eject button
5 "CLEAR" button (deletes individual characters or complete entry)
6 "Skip back" button
7 "Skip forward" button
8 Memory card slot
9 CD/DVD drive

The following components are also integrated into the COMAND controller unit:
- Single drive or disk change
- Arithmetic unit
- HDD hard disk
- Audio amplifier (without code (810) Sound system)
- Bluetooth(R) receiver for basic telephony
- Radio tuner
- High Definition (HD) radio tuner (with code (512) COMAND APS incl. DVD changer and code (494) USA version)

Function
^ Controls
^ DVD drive
^ Navigation and GPS control unit
^ Turn rate sensor
^ Control unit for voice control system (VCS [SBS])
^ Map reading device for SD memory card

Controls
The buttons on the operating panel of the COMAND controller unit are read in and relayed to the central computer. The button operations are processed further in the central computer and forwarded via MOST, the telematics CAN and the interior CAN to the other system components in the form of messages. If the ON button on the COMAND controller unit is pressed, the COMAND controller unit is switched on. The volume is regulated for each audio source set by turning the ON button. The function keys switch over to the audio source desired by the user.
In the event of a system fault or system crash, pressing the "ON" button for t = 8 s will reboot the COMAND controller unit.

DVD drive
With the aid of the integrated DVD drive, audio CDs/DVDs or video DVDs can be played, and data (e.g. updates) from the navigation DVD can be stored on the internal hard drive.

Navigation and GPS control unit
The navigation processor is integrated into the COMAND controller unit and calculates the location of the vehicle using the incoming antenna signals. It also calculates the vehicle's route after the destination has been entered.

Turn rate sensor
The turn rate sensor determines the direction changes of the vehicle. It is installed into the navigation processor. A calibration is not required.

Control unit for voice control system (VCS [SBS])
The voice commands are processed and evaluated in the COMAND controller unit. The voice outputs for the dialog with the user are generated in the COMAND controller unit.

Map reading device for SD memory card
With the aid of the integrated card reader, data and audio files can be copied from an SD memory card to the HDD hard drive and then called up.

Variants
The COMAND controller unit is available in the following variants:
- With code (527) COMAND APS with Single DVD disk drive (with navigation)
- With code (512) COMAND APS with DVD changer

Diagnosis
The COMAND controller unit is the diagnosis gateway for all MOST users. The diagnostic communication takes place between the COMAND controller unit and the front SAM control unit with fuse and relay module (N10/1) via the interior CAN. The diagnostic communication between the front SAM control unit with fuse and relay module and the diagnostic connector (X11/4) connected to the ISE tester is performed via the diagnostic CAN (CAN D).