Component description for COMAND controller unit - GF82.85-P-3136CEA

MODEL 204.0 /2 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (512) COMAND APS with DVD changer as of model year 2012 /model refinement package 11 

MODEL 204.3 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (512) COMAND APS with DVD changer 

Shown with code (512) COMAND APS with DVD changer 

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
  • Electrical AUX connector (X39/45) (without code (518) Media interface) and electrical USB connector(X115), in stowage compartment (telephone compartment) below center armrest, for external audio equipment
  • Bluetooth® 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 (494) USA version)
• 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:

• Direct line 
• Controller Area Network (data bus/CAN bus) (CAN) 
• Media Oriented System Transport (MOST) 

Direct line 

The COMAND controller unit has the following direct connections:

• Circuit 30g
• Circuit 31
• Wake-up for MOST
• Electrical AUX connector (X39/45) (access in telephone compartment in center console) (except code (518) Media interface)
• Electrical USB connector(X115) (access in telephone compartment in center console)
• Audio mute for telephone call
• FM, AM and CL antenna amplifier(A2/18) (model 204.0/3)
• Rear window antenna amplifier 1 (A2/71) (model 204.2)
• Rear window FM antenna amplifier (A2/19) (model 204.0/2/3)
• Bluetooth antenna (A2/91)
• Multifunction antenna (A28/11)
• Handsfree system microphone (A67b1) (2 microphones)
• Y-brightness (luminance)/C-color information (chrominance) (Y/ C) lines from TV digital tuner (A90/3) (with code (865) TV tuner)
• Color video baseband signal (CVBS) from:
  • Reversing camera power supply module (N66/2) (with code (218) Reversing camera) or
  • Media interface control unit (N125/1) (with code (518) Media interface)
• 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)
• External fan (diagnosis)

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 (with code (518) Media interface)
• TV digital tuner (with code (865) TV tuner)

Evaluation of input factors 

The input values are processed in the COMAND controller unit.

Activation of output media and system components 

• Audio output (speaker) (without code (810) Sound system)
• Video output: Low Voltage Differential Signal (LVDS) line for picture and video signals from COMAND control unit to 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 (359) TELE AID emergency call system)
• VICS control unit (switching voltage (with code (498) Japan version, Dealer Option)
• Electronic Toll Collection control unit (control) (with code (498) Japan version, Dealer Option)

When Digital Audio Broadcasting (Digital Radio) (DAB) is active (with code (537) Digital radio) the COMAND control unit sends FM signals received in parallel via MOST to the Digital Audio Broadcasting control unit.

Design 

Shown on COMAND controller unit with code (512) COMAND APS incl. DVD changer 

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® 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 cards 

Controls 

The buttons on the operating panel of the COMAND controller unit are read in and relayed to the arithmetic unit. The button operations undergo further processing in the arithmetic unit and are forwarded via the MOST, the telematics CAN or 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 user can switch to the desired function range with the function keys.

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 

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 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 dialogue 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 from a SD memory card can be stored on the internal hard disk 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).

Technical data  Designation	Unit	Values	Tolerance range	Remarks
COMAND controller unit
Power supply	VV	12		Operating voltage (UB )
Voltage limits	VV	9		Minimum (UBmin )
	VV	16		Maximum (UBmax )
Power consumption	A	15		Rated current consumption (IBmax)
	A	3.5		Rated current consumption (IBTyp )
	A	approx. 4.5		Speaker (IAction )
	A	approx. 0.1		Cradle ON/OFF (IAction )
	mA	0.1		Quiescent current (I0 )
Reverse polarity protection				Yes
Additional specific parameters				None
Special features				The COMAND controller unit is protected with a 20 A fuse in the combination plug, MQS 40+4 pin (electrical) at the rear panel.
Flash capability/coding capability				Yes/yes
COMMAND fan motor
Type				Direct current motor
Power consumption	mA	500		Rated current

	Cockpit Management and Data System (COMAND) control unit wiring diagram	Except code (498) Japanese version	PE82.85-P-2101-97FAD
		with CODE (498) Japanese version sheet 1	PE82.85-P-2101-97FAE
		with CODE (498) Japanese version Sheet 2	PE82.85-P-2101-97FAF