GF82.85-P-3136FLJ COMAND Controller Unit, Component Description

GF82.85-P-3136FLJ COMAND controller unit, component description
- with CODE (527) COMAND APS with single DVD drive (with navigation system)
- with CODE (498) Japan version

Component Identification:

Location
The COMAND controller unit is installed into 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
^ Reads 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:
- "Navi"
- "Home"
- "Information diagram"
- "Stop/continue guidance"

- "Audio"
- "FM" (frequency modulation)
- "AM" (amplitude modulation)
- "Disk"
- "Memory card"
- "Music Register"
- "Media interface"
- "Rear"
- "Aux" (auxiliary)

- "ComTel"
- "Phone"
- "Address book"
- "FM multiplex"

- "Video"
- "TV"
- "DVD Video"

- "System"
- "System settings"
- "Language"

Reads 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 (bi-directional)
- AUX input 1 (access in glove compartment)
- FM 1, AM, CL and KEYLESS-GO antenna amplifier (A2/18)
- Antenna amplifier FM 2 and DAB (A2/19)
- Bluetooth antenna (A2/91)
- Multifunction antenna (A28/11)
- Hands-free system microphone (A67b1) (2 microphones)
- Y-brightness (luminance)/C-color information (chrominance) (Y/ C) and audio lines from DVD player (A40/4) (with code (864) Rear entertainment system)
- Y/C lines from TV digital tuner (A90/3)
- Y-lines from Night View Assist control unit (N101) (with code (610) Night View Assist)
- Reversing camera control unit (N66/2)
- VICS control unit (A2/37)
- Electronic Toll Collection control unit (A50/3)
- Communications control unit (N123/6), up to 31.5.2010

CAN
- The COMAND controller unit is a telematics CAN (CAN A) subscriber.
- The COMAND controller unit is an interior CAN (CAN B) subscriber.

MOST
Control and audio signals from the following control units:
- Sound system amplifier control unit (N40/3) (with code (810) Sound system)
- TV digital tuner
- Media interface control unit (N125/1) (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
- 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)
- Switching voltage for the communications control unit, up to 31.5.2010
- Switching voltage for VICS control unit
- Control of the Electronic Toll Collection control unit

Component Identification:

The following components are also integrated into the COMAND controller unit:
- Central computer
- Navigation and GPS control unit
- Hard disk
- Audio amplifier (without code (810) Sound system)
- Bluetooth(R) receiver for basic telephony
- Radio tuner

Function
^ Operating elements
^ DVD drive
^ Navigation and global positioning system (GPS) control unit
^ Turn rate sensor
^ Control unit for voice control system (VCS [SBS])
^ Card reader for Personal Computer Memory Card International Association (PCMCIA) memory card

Operating elements
The function keys and keypad of the operating panel on the COMAND controller unit are read in and provided 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 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 read in data from the navigation DVD (e.g. navigation update) or play an audio CD/DVD or video DVD.

Only genuine audio CDs can be converted to the MP3 format and stored on the hard disk.

Navigation and GPS control unit
The navigation and GPS control unit is integrated into the COMAND controller unit and calculates the vehicle location using the incoming antenna signals, the wheel speeds and the signal of the turn rate sensor and calculates the vehicle route after the destination has been entered.

Turn rate sensor
The turn rate sensor determines the direction changes of the vehicle. It is installed in the navigation and GPS control unit. A calibration is not required.

Diagnosis
The COMAND controller unit is the diagnosis gateway for all MOST subscribers and the directly connected communications control unit (up to 31.05.2010). 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 "IS tester" is performed via the diagnostic CAN (CAN D).

Control unit for 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 PCMCIA memory cards
With the aid of the integrated card reader, data (except audio data) from a PCMCIA memory card can be stored on the internal hard disk and then called up. Audio data on the PCMCIA memory card can be played from it, but not copied onto the hard disk.