GF82.85-P-3136FQ Component Description For COMAND Controller Unit
GF82.85-P-3136FQ Component Description For COMAND Controller Unit
MODEL 218
- with CODE (512) COMAND APS with DVD changer
MODEL 218
- with CODE (527) COMAND APS with single DVD drive (with navigation system)
- except CODE (498) Japan version
Shown on vehicle up to 30.6.11 without code (518) Media interface
A40/3 COMAND control unit
A40/8 Audio/COMAND display
X39/45 AUX jack electrical connector (without code (518) Media Interface)
Shown on vehicle as of 1.7.11 with code (518) Media interface
A40/3 COMAND control unit
A40/8 Audio/COMAND display
X18/70 Media interface electrical connector (with code (518) Media Interface)
X115 USB electrical connector
Location
The COMAND controller unit is integrated at the front center into the center console, the AUX electrical connection and as of 1.7.11 the USB electrical connection are located in the center armrest's stowage compartment.
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
- Memory card
- Music Register
- Bluetooth(R) Audio
- AUX electrical connection in center console stowage compartment under the armrest, for external audio devices (without code (518) Media interface)
- USB electrical connection in center console's stowage compartment under the armrest (as of 1.7.11)
- Video
- DVD
- TV (with code (863) Digital/analog TV tuner)
- Media interface for external audio or mass storage devices (with code (518) Media interface)
- Navigation (map navigation with data from internal hard disk)
- Voice control system (VCS [SBS])
- Telephony (including address book)
- System settings and (as of 1.7.11) Fuel consumption indicator
- Internet (COMAND Online) (as of 1.7.11)
Reading in the controls and input signals
The input factors are read in via the following connections:
^ Direct line
^ CAN
^ Media Oriented System Transport (MOST)
Direct line
The COMAND controller unit reads in the following signals via a direct line from the corresponding components:
- AM and FM-1 signals from FM 1, AM, ZV and KEYLESS-GO (A2/18) antenna amplifier
- FM 2 signals from FM 2 and DAB antenna amplifier (A2/19)
- Signals for telephony, Bluetooth(R) Audio and, as of 1.7.11, for Internet from Bluetooth antenna (A2/91)
- Audio signals from AUX jack electrical connector (without code (518) Media interface)
- Audio signals from USB electrical connection (as of 1.7.11)
- GPS signals from the multifunction antenna (A28/11)
- Signals for VCS [SBS] and telephony from handsfree system microphone (A67b1)
- Video signals for TV use via a Y - brightness (luminance)/C - color information (chrominance) line from the TV tuner (analog/ digital) (A90/1) (with code (863) Digital/analog TV tuner)
- Picture signals for Night View Assist via Y line from Night View Assist control unit (N101) (with code (610) Night View Assist)
- Composite Video Baseband Signal (CVBS [FBAS]) from:
- Reversing camera power supply module (N66/10) (with code (218) Reversing camera) or
- Media interface electrical connector (X18/70) (with code 518) Media Interface)
- Mute signal from emergency call system control unit (N123/4) (with code (359) TELE AID emergency call system)
- Diagnosis signals for COMAND fan motor (M4/13)
CAN
The COMAND controller unit uses the telematics CAN (CAN A) and the interior CAN (CAN B).
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Media Oriented System Transport (MOST)
The COMAND controller unit receives audio signals from the following control units via MOST:
- TV tuner (analog/digital) (with code (863) Digital/analog TV tuner )
- 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 (with code (518) Media interface)
Evaluation of input factors
The input values are processed in the COMAND controller unit.
Activation of output media and system components
The system components are actuated via the following connections:
^ Direct line
^ CAN
^ MOST
Direct line
The COMAND controller unit sends signals via direct lines to the following components:
- Audio signals to the speaker system (without code (810) Sound system):
- Left front door speaker (H4/1)
- Left front door tweeter (H4/1h1)
- Right front door speaker (H4/2)
- Right front door tweeter (H4/2h1)
- Left rear door speaker (H4/3)
- Left rear door tweeter (H4/3h1)
- Right rear door speaker (H4/4)
- Right rear door tweeter (H4/4h1)
- Video signals via low voltage differential signal (LVDS) line to the Audio/COMAND display (A40/8).
- Microphone output to emergency call system control unit (with code (359) TELE AID emergency call system)
- Control signals for COMAND fan motor
In addition to issuing electrical signals, the COMAND controller unit also sends voltages to the following components via a direct line:
- Power supply for COMAND fan motor
- Wake-up for MOST to following control units:
- Sound system amplifier control unit (N40/3) (with code (810) Sound system)
- Digital Audio Broadcasting control unit (with code (537) Digital radio)
- Satellite digital audio radio (SDAR) control unit (with code (536) SIRIUS satellite radio)
- Media interface control unit (with code (518) Media interface)
- Phantom voltage to following components:
- FM 1, AM, CL and KEYLESS-GO antenna amplifier
- FM 2 and DAB antenna amplifier
- Multifunction antenna
CAN
The COMAND controller unit is a telematics CAN and interior CAN subscriber.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
MOST
The COMAND controller unit sends the following signals via MOST:
- Control signals:
- Sound system amplifier control unit (with code (810) Sound system)
- Digital Audio Broadcasting control unit (with code (537) Digital radio)
- Satellite digital audio radio (SDAR) control unit (with code (536) SIRIUS satellite radio)
- Media interface control unit (with code (518) Media interface)
- TV tuner (analog/digital) (with code (863) Digital/analog TV tuner)
- Audio signals:
- Sound system amplifier control unit (with code (810) Sound system)
Design
Shown on vehicle up to 30.6.11
1 Function keys
2 Keypad
3 "ON" button
4 Volume control ring collar
5 CD/DVD eject button
6 "C" button (deletes individual characters or complete entry)
7 "Skip back" button
8 "Skip forward" button
9 Memory card slot
10 Memory card ejector button
11 CD/DVD drive
The following components are also integrated into the COMAND controller unit:
- Central computer
- Navigation processor
- HDD hard disk
- Audio amplifier
- Bluetooth receiver for basic telephony
- Radio dual tuner
- High definition (HD) radio tuner with code (494) USA version)
Function
^ Controls
^ DVD drive
^ Navigation and GPS control unit
^ Turn rate sensor
^ Control unit for voice control system (VCS [SBS])
^ Card reader for memory cards
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 by turning the ring gear's "ON" button. The function keys switch over to the audio source desired by the user.
In the event of system fault or system crash, pressing the "ON" button for t = 8 s will reboot the COMAND controller unit.
DVD drive
The integrated DVD drive can be used to play back audio CDs/DVDs or video DVDs and store data (e.g. update) from the navigation DVD 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 integrated into the navigation processor and does not need to be calibrated.
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 dialogue with the user are generated in the COMAND controller unit.
Card reader for memory cards
With the aid of the integrated card reader, data and audio files can be copied from a memory card to the HDD hard drive and then called up.
Card reader variants
In vehicles up to 30.6.11 the card reader is compatible with Personal Computer Memory Card International Association (PCMCIA) memory cards.
In vehicles as of 1.7.11 the card reader is compatible with Secure Digital (SD) memory cards.
Variants
The COMAND controller unit is available in the following variants:
- Code (527) COMAND APS with single DVD drive (with navigation), up to 30.6.11 or as of 1.7.11
- Code (512) COMAND APS with DVD changer, up to 30.6.11 or as of 1.7.11
Diagnosis
The COMAND controller unit is the diagnostic interface (gateway) for all MOST users.
The diagnostic communication between the COMAND controller unit and the front SAM control unit with fuse and relay module (N10/1) takes place 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 diagnostic tester is performed via diagnostic CAN (CAN D).
