Страница 1 мировой engineering стандарты общая спецификация

8.13.8 Tester Implications. 
This service should only be physically addressed (point to point). The size of the
startingAddress parameter is determined via information in the utility file.
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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.14 WriteDataByIdentifier ($3B) Service. 
The purpose of this service is to provide the ability to change
(write/program) the content of pre-defined ECU data referenced by a dataIdentifier (DID) which contains static
information like ECU identification data, or other information which does not require 
real-time 
updates.
8.14.1 Service Description. 
The tester is required to provide the dataIdentifier value desired, while the target
ECU shall be responsible for knowing the address location and block length corresponding to the requested
dataIdentifier. An ECU is not required to support all corporate standard DIDs, and may support additional
application specific DIDs. Application specific DIDs supported by this service shall be documented in the
ECU’s CTS or supplemental diagnostic specification referenced in the CTS.
Note: 
Appendix C of this specification contains a list of corporate standard DIDs.

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It shall be possible for Nodes to restrict the tester’s ability to write certain dataIdentifiers based on the security
status of the node.
8.14.2 Request Message Definition. 
The length of the request message is dependant upon the size of the
data referenced by the dataIdentifier parameter. Only one dataIdentifier which is supported by the ECU shall
be included in the request message. See Table 146.