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

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

MODEL 203.0 /2 /7 as of 24.4.04
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- up to Model Year 8

Activating navigation
If the driver's door is opened the navigation is activated automatically via the controller area network bus class B (interior) (CAN-B) . When the Digital Versatile Disk (DVD) is inserted, this procedure may be accompanied by slightly audible noise of the DVD drive integrated into the navigation processor. The display of the COMAND operating, display and control unit (A40/3) remains switched off.
If in response there is no change in the status of the electronic ignition switch control unit (N73), e.g. "circuit 15C" or "15R ON", the navigation remains active for t = 30 min.

Activating the overall system
Inserting the transmitter key (A8/1) into the electronic ignition switch control unit (N73) in position 0 (circuit 15C) activates all other subsystems.

At position 1 (circuit 15R ON) of the transmitter key (A8/1) the display is switched on. This functions, insofar as the COMAND operating, display and control unit (A40/3) was switched on prior to the last removal of the transmitter key (A8/1).

The system which was active before it was last switched off (e.g. radio) 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 t = 30 minutes, a warning message with general information on the use of the system appears.

Conduct when pushing "ON" button
It is possible to also switch on the COMAND operating, display and control unit (A40/3) when the transmitter key (A8/1) is withdrawn by pressing the "ON" button. All functions are then available for t = 30 minutes

After the expiry of 30 min, the COMAND operating, display and control unit (A40/3) automatically switches off.

If switching off has occurred after t = 30 min, the system can be switched on again by pressing the "ON" button: the run-on time of t = 30 min then starts again.

Following the last navigation operation (destination reached) the position map is switched off again. After 1 minute of run-on time has elapsed, the device switches off.

Switch off characteristics
The COMAND operating, display and control unit (A40/3) is switched off when the transmitter key (A8/1) "circuit 15C OFF" is removed. The navigation system run-on time of t = 30 min starts (standby mode). During the run-on time, all the important localizing parameters are stored. The run-on time of the audio systems can be adjusted and is done when the COMAND operating, display and control unit (A40/3) is installed in the factory. Furthermore, the COMAND operating, display and control unit (A40/3) is always in standby mode, when CAN B is active.

Switch off characteristics at undervoltage
The COMAND operating, display and control unit (A40/3) constantly monitors the battery voltage. Depending on the voltage value the system will act as follows:

If the battery voltage drops below 11.5 volts (battery warning area) a message appears in the display which requests the engine to be started If the engine is not started, a further warning follows after 3 minutes indicating that 10 seconds remain for starting the engine before the system shuts off. In this case switching on the engine prevents the system from being automatically shut down. However, if the system has shut off and the voltage increases to more than 11.5 V again, the COMAND operating, display and control unit (A40/3) does not automatically switch itself on again.

If a system has been shut down it can still be switched back on again manually. The warning procedure ensues each time until the fault is 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 is 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.

Exceptions to switch-off behavior (run-on mode) if destination not reached:
- The navigation system remains active up to t = 30 min (e.g. when refueling). The navigation continues once the vehicle restarted.
- After t = 30 min up to max. 2 h, the COMAND operating, display and control unit (A40/3) remains in "Sleep mode". The route is calculated again after the vehicle is restarted and the navigation continued
- After expiry of t = 2 h a request is displayed when the vehicle is restarted asking if the route is to be calculated again. "YES" = Route to be calculated again "NO" = Navigation to be ended