The CAN network is not only used for diagnostic application, the goal of the first use of this network is

to carry out the intersystem communications, the related message set don t comply with the

specification established in this document. Thus these 2 types of application shall be able to cohabit on

the bus without trouble. Closely links are made between documents related to both application.

Although this specification is written to meet the diagnostic application requirements, the scheme of

message segmentation can be apply to another application involving messages with more than 7 data

bytes.

This document does not specify any requirement for legislated on board diagnostic "OBD" purpose.

Refer to the ISO document [REF 5] for its implementation in the emission-related systems. No

restriction , no specific implementation is allowed, full compliance with the standard is requisite