Automotive dictionary

Explains vocabulary and abbreviations used in Automotive

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Base Variant

Base Variant is short for an ECU-Base-Variant layer. The ECU-Base-Variant layer is a category of the ODX data model.


The base data types are the data types for describing physical representations and coded values of Data Object Properties (DOP) determined by the ODX standard.


BEST is short for a description language for ECUs. BEST is a proprietary programming language for ECU description files (EDF) that are used with the runtime system EDIABAS.


The blockSequenceCounter is the block counter of the diagnostic service $36 (transferData).


The boundary is the name space of objects and describes rules for the uniqueness of names. See also ODX data pool.


A bridge connects two logically independent networks on the OSI model data link layer.


Broadcast is when a node transmits a message and all other nodes including the transmitter receive the message. Broadcast messages are sent to all other nodes in the network.

Byte order

The byte order determines in which order the bytes of a value are transmitted on a bus or are stored in a memory. The hexadecimal representation for a decimal value of 100 is $64. The 16-bit value in Motorola byte order format is $0064, in Intel byte order format is $6400. Both bytes are exchanged. A clear-cut specification of the byte order for coded values is necessary, because the tester and the ECUs can use different byte orders. The D-server can adjust the byte order of data automatically. See also Intel byte order and Motorola byte orĀ­der.


Byteflight is a deterministic bus system for safety-relevant functions. It was developed by BMW in cooperation with Motorola, Elmos, and Infineon as part of the Intelligent Safety Integration System (ISIS). Byteflight was introduced in 2000 on the SAE congress in Detroit.

Source Christoph Marscholik and Peter Subke (2008) - Road vehicles, Diagnostic communication -