General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification

Procedure 7: 
Optional. To be verified if the node requires data file compatibility checks.
 
1. Obtain an archive file that contains data files that are not compatible (either operational software not 
compatible with the boot software or a calibration file that is not compatible with the operational software). 
Attempt to program the node using a programming tool (e.g., DPS Tool or SPS Tool created by Service 
Operations). Verify that the programming event fails as a result of a $7F $36 $85 response at the 
appropriate time. 
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 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 170 of 336 
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. 
It shall be possible for Nodes to restrict the tester
’s ability to write certain dataIdentifiers based on the security 
status of the node.