Component description for COMAND controller unit - GF82.85-P-3136LEU
MODEL 216, 221 with CODE (530) COMAND APS USA (with navigation system) as of model year 2009 /YoM 08
Shown on model 221 up to 31.5.2009
Location
The COMAND controller unit is installed into the center console.
Task
The COMAND controller unit fulfills the following tasks:
- Computer for entertainment and communication systems
- Reading in of signals
- Evaluation of input factors
- Actuates output media
Computer for entertainment and communication systems
The COMAND controller unit provides the user with a structured and standard interface through the COMAND display (A40/8). The COMAND controller unit generates standard and user-friendly displays for all the individual components integrated into the system.
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 lines
The following signals are read in via direct lines:
- Wake-up (MOST)
- AUX input
- Global Positioning System (GPS) signal from antenna splitter (A2/5)
- Color Video Baseband Signal (CVBS) from reversing camera power supply module (N66/10) (for model 221 with code (218) Reversing camera)
CAN
The signals are read in over the telematics CAN (CAN A) and central CAN (CAN F). The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
MOST
The COMAND controller unit communicates with the following control units via MOST depending on the equipment specification:
- Voice control system (VCS [SBS]) (N41/3) (up to 31.5.2009 with code (813) Voice control system (VCS [SBS]))
- SDAR control unit (N87/5) (with code (536) SIRIUS satellite radio)
- High definition tuner control unit (N87/8) (as of 1.6.2009 with code (517) HD radio)
- Audio tuner control unit (N93/1) (except model 221 as of 1.9.2010 with code (811) Advanced Sound System)
- Digital sound processor (A2/69) (model 221 as of 1.9.2010 with code (811) Advanced Sound System)
- Universal Portable Cell Phone Interface (UPCI [UHI]) control unit (N123/1) (up to 31.5.2008 with code (389) Mobile phone preinstallation with universal interface USA/Canada)
- Media interface control unit (N125/1) (as of 1.6.2009 with code (518) Media interface)
Evaluation of input factors
The input factors are processed and evaluated by the COMAND controller unit.
Actuates output media
The output media are actuated through the following connection:
- Direct line
- CAN
- MOST
Direct line
The following output medium is actuated through a direct line:
- COMAND display over a low-voltage differential signal (LVDS) line (picture and video signals)
The following system components are actuated internally:
- Map navigation with hard disk as data memory (data update through special navigation DVD)
- Up to 31.5.2009: Card reader for Personal Computer Memory Card International Association (PCMCIA) cards with MP3 files
- As of 1.6.2009: Card reader for Secure Digital Memory Card (SD) cards
- DVD-ROM drive (single slot or 6-disk DVD changer with single-slot)
CAN
The signals are sent over the telematics CAN and central CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
MOST
The COMAND controller unit communicates with the following control units via MOST depending on the equipment specification:
- Voice control system (VCS [SBS]) control unit
- SDAR control unit
- High-definition tuner control unit
- Audio tuner control unit
- Digital sound processor
- Universal Portable CTEL Interface (UPCI [UHI]) control unit
- Media interface control unit
Design
Integrated into the COMAND controller unit are the following:
- DVD changer
- Central computer
- Interfaces to MOST, telematics CAN and central CAN
- Navigation processor
- Hard disk
Diagnosis
The COMAND controller unit acts as a diagnostic interface for all control units on the MOST and telematics CAN. Each control unit on the MOST or the telematics CAN has a separate fault memory. When the COMAND controller unit is active, any faults that occur are each stored in a nonvolatile memory. They can be read out using the diagnostic CAN (CAN D) and the data link connector (X11/4).
| Cockpit Management and Data System (COMAND) control unit wiring diagram | Model 216 Up to modification year 09 |
PE82.85-P-2101-97CAA | |
| Model 216 As of YoM 09, HIGH Class Sheet 1 |
PE82.85-P-2101-97CAE | ||
| Model 216 As of YoM 09, HIGH Class Sheet 2 |
PE82.85-P-2101-97CAG | ||
| Model 221 Up to modification year 09 |
PE82.85-P-2101-97SAA | ||
| Model 221 As of YoM 09, HIGH Class Sheet 1 |
PE82.85-P-2101-97SAE | ||
| Model 221 As of YoM 09, HIGH Class Sheet 2 |
PE82.85-P-2101-97SAG |