BMW E65 User Manual download pdf (Page 10)

E65 Bus Systems

BSD

Communication via the BSD enables adjustment of the battery charging voltage, and com-

munication between the DME and oil quality sensor for example.

Gateways

Introduction

A gateway (GW) is an interface. It connects different bus systems within the vehicle's elec-

trical system. It provides a means of ensuring the exchange of information in spite of

differences in the rates of data transmission on the individual bus systems. Diagnostic

access to the individual control units from a central point is made possible by the gateway.

The gateway modules used in the E65 are the Car Access System (CAS), Control Display

(MCGW-MOST/CAN gateway) and the Central Gateway Module (ZGM).

Method of Operation

The data transmitted by the various bus systems is received by the gateway. At this point,

transmission rates, data and priority levels of the individual messages are filtered and tem-

porarily stored if necessary. This requires a non-volatile memory.

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BMW E65 User Manual Page 10