Страница 1 мировой engineering стандарты общая спецификация

Page 99
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110

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25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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© Copyright 2010 General Motors All Rights Reserved
February 2010
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8.5 ReturnToNormalMode ($20) Service. 
The purpose of this service is to return a node or group of nodes to
normal mode operation by canceling all active diagnostic services and resetting normal message
communications (if they were interrupted by a diagnostic operation).
All nodes participating in a GMLAN network shall support this service even if the node itself is diagnosed over
another vehicle bus (e.g., KWP2000 or Class 2). This requirement is necessary to facilitate programming of
other devices on the GMLAN subnet.
8.5.1 Service Description. 
The following enhanced diagnostic services are terminated and/or reset by service
$20:
•
All levels of service $10 
InitiateDiagnosticOperation 
are terminated.
•
Service $27 
SecurityAccess 
is terminated and a node shall become locked if the Manufacturers Enable
Counter is $00 and the Vulnerability Flag (if implemented) is not $FF.
•
Service $28 
DisableNormalCommunication 
is terminated.
•
All levels of service $A5 
ProgrammingMode 
are terminated.
•
Service $A9 
ReadDiagnosticInformation 
send-on-change reporting of DTC count information is
terminated.
•
Service $AA 
ReadDataByPacketIdentifier 
periodic message scheduler logic is reset. However, the node
shall retain all dynamically defined message (DPID) information.
•
Service $AE