Navigation Computer (NAV. 01)

The navigation computer is located in the left rear corner of the luggage compartment.

Similar to the Mk-3 computer, the E65 NAV. 01 contains:

• CD drive.
• Hardware for navigation, telematics and online services function.
• Transceiver for interface with the MOST network. (Transceiver contains two nodes)
• Gyro sensor.
• GPS receiver.
• Output for RGB (graphics interface)
• Cooling fan for unit.
  Fig 1: View Of Navigation Computer (NAV. 01)

  Courtesy of BMW OF NORTH AMERICA, INC.

Building maps on the Control Display is now considerably faster than before. This improvement was achieved by means of modifications to the hardware.

The connection to the MOST bus is by a standardized MOST transceiver. The MOST transceiver incorporates two interfaces (nodes).

Each MOST telegram is divided into 3 parts.

• Control data
• Asynchronous data (e.g. navigation system, arrow presentation)
• Synchronous data (e.g. audio, video signals)

A node can analyze only two signals at a time, this is the reason why two nodes are necessary for the navigation computer. In the Control Display self-test, both nodes are shown as control units but only one node can be displayed as a recognized control unit. The second node is always displayed as "wait" (normally control unit not recognized).