GF82.85-P-2006SKJ Switch On/Off Behavior, Function

GF82.85-P-2006SKJ Switch On/Off Behavior, Function
- with CODE (498) Japan version

Activation of entire system
Position 0 (key in ignition)
In order to ensure a quicker switch-on process, only the bus systems are activated for t = 3 minutes by inserting the transmitter key (A8/1) into the EIS control unit (N73), position 0 (circuit 15C). If the COMAND operating, display and control unit (A40/3) is switched on using the "ON" button, an automatic shut-off occurs after t = 30 min.

Position 1 (radio position)
Turning the transmitter key to position 1 (circuit 15R ON) switches the device on, provided that it was switched on when the transmitter key (A8/1) was last removed. It remains in operation until the transmitter key (A8/1) is removed again.

The function options are limited to:
^ Operation of the COMAND operating, display and control unit (A40/3)
^ Liquid crystal display (LCD) in instrument cluster (A1)
^ Operation via multifunction steering wheel (MFL)

Position 2 (ignition ON)
All the functions in the vehicle are operational by continuing to turn the transmitter key (A8/1) into position 2 (circuit 15 ON). The system which was active before it was last switched off (e.g. COMAND operating, display and control unit (A40/3)) is switched on and the corresponding basic menu is displayed. If the COMAND operating, display and control unit (A40/3) was switched off for longer than 30 minutes, a warning menu with general information on the use of the system appears.

Position 3 (engine start)
Moving the transmitter key (A8/1) to position 3 (circuit 50 ON) starts the engine. If a considerable voltage drop occurs while the engine is being started, the system switches itself off during this time, and is switched on again after the on-board electrical system has stabilized.

Navigation system activation
The navigation system is activated automatically via the class B (interior) controller area network bus (CAN-B) when the driver door is opened. This procedure takes about 2 seconds. The display of the COMAND operating, display and control unit (A40/3) remains switched off. If no status change then occurs at the EIS control unit (N73) (e.g. circuit 15C or circuit 15R ON), the navigation systems remains activated for t = 60 minutes.

Conduct when pushing "ON" button
The COMAND operating, display and control unit (A40/3) can also be switched on with the transmitter key removed (A8/1) (circuit 15C OFF) by pressing the "ON" button on the rotary switch.

All functions are then available for 30 minutes. The system switches off automatically once 30 minutes have elapsed. If the system has switched off after 30 minutes, the system can be switched on again by pressing the "ON" button. The cycle of 30 minutes then starts from the beginning.

On-off behavior using "AUTO ON"
If the portable CTEL (A34/6) is connected to the preinstalled plug of the Personal Digital Cellular (PDC) mobile radio system, an incoming telephone call or SMS during the system run-on phase can activate the COMAND operating, display and control unit (A40/3), since the portable CTEL (A34/6) is directly linked to the COMAND operating, display and control unit (A40/3) via a serial interface. This initiates a wake-up pulse via the Media Oriented System Transport (MOST). The system components are "woken up". The MOST system is ready for operation to provide the necessary functions. Switching off takes place either via the "ON" button (ON, OFF) or by removing the transmitter key (A8/1) (circuit 15C OFF).

An active phone call is not interrupted by removing the transmitter key (A8/1) (circuit 15C OFF). In this case the COMAND operating, display and control unit (A40/3) switches itself off.

Switch off characteristics
The COMAND operating, display and control unit (A40/3) is switched off when "circuit 15C OFF" occurs. Then the navigation system run-on time of t = 60 min starts (standby mode). During this period all the important locating parameters are stored. The COMAND operating, display and control unit (A40/3) and audio gateway control unit (N93/1) are always in "standby" mode when CAN-B is active.

Switch off characteristics at undervoltage
The central computer of the COMAND operating, display and control unit (A40/3) constantly monitors battery voltage. If the battery voltage drops below 11.5 V (battery warning limit), a message appears in the display and requests that the engine be started.

If the engine is not started, another warning is issued after t = 3 minutes indicating that only 10 seconds remain to switch the engine on before the device shuts itself off. In this case switching on the engine prevents the system from being automatically shut down. If the system has shut itself off and the voltage rises above 11.5 V again, the COMAND operating, display and control unit (A40/3) does not switch itself on again automatically.

If a system has been shut down it can still be switched back on again manually. The warning procedure then ensues for as long as the fault is not eliminated.

Battery voltage below 9.5 V (undervoltage)
The COMAND operating, display and control unit (A40/3) is automatically put into a defined standby condition, in which only the battery voltage continues to be monitored. In addition to this the current operating status is stored. The COMAND operating, display and control unit (A40/3) cannot be operated or accessed using STAR DIAGNOSIS when it is in this condition.
Communication with external components does not take place.