Diagnostic Mode

The navigation system may be put into a on-board diagnostics mode (service mode) by selecting the "settings" menu from the main menu then pushing and holding the menu key for about 10 seconds. The service mode has four main functions:

• To check that components are fitted and to determine their hardware/software levels.
• To perform a quick "health check" of the major input signals to the system.
• To check for correct operation of the Display and Control unit keys.
• To check the status of the GPS reception.

Selecting the On-Board Monitor item from the service mode menu causes the version info to be displayed. The screen displays the software and hardware level of the display and control unit together with the diagnostics and bus index. The supplier of the unit is also displayed as a number code defined by BMW. The system queries the display and control unit before displaying the information on the screen. If the unit responds with Software Hardware levels this implies that the component is connecting to at least Power, Ground and K-bus.