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Table C6: Definition of Diagnostic Data Identifier dataIdentifier
DID Description
R/W
Data Type
Len
$9A 
DiagnosticDataIdentifier (DDI)
R/W*
USN
2
This DID contains the DiagnosticDataIdentifier which identifies a supplier and system specific diagnostic
data stream and shall be used by diagnostic testers to interpret a diagnostic data stream. The data
format of the DDI is defined as two bytes, where the most significant byte of the DDI identifies the
system by a system code and the least significant byte identifies the system data stream version
number.
System Code (DDI high byte) shall be used to distinguish between the following cases:
•
Different ECU systems, where the ECU uses the same Diagnostic Address (see DID $B0 Table for
definition).
•
Different system suppliers of the same component.
•
Non-compatible ECU hardware and/or non-compatible software.
Diagnostic Data Stream Version Number (DDI low byte) shall be incremented when:
•
The diagnostic implementation is changed and the changes affect Service/Aftersales and/or
Manufacturing diagnostic test tools.
For an SPS_TYPE_B or SPS_TYPE_C ECU, the value of the least significant byte of the DDI shall
always be $00 (provided that the DID is supported in a node which is not completely programmed).
Position
1
2 Description
DDI
02 03 System Code, e.g., $02 = Simtec MS56.5
Hex Value
02 03 Diagnostic Data Stream Version Code, e.g., $03 = version 03
Table C7: Definition of XML Configuration Compatibility Identifier dataIdentifier
DID Description
R/W
Data Type
Len
$9B 
XmlConfigurationCompatibilityIdentifier (XMLCCID)
R
USN
2
This DID contains the XmlConfigurationCompatibilityIdentifier. This DID shall be supported if an ECU
performs option configuration via a released XML file. The tool must read this DID and ensure that the
data read matches the value of the XMLCCID embedded in the XML file before performing any DID
writes dictated by the XML configuration file. This ensures that the configuration data within the XML file
is compatible with the software/hardware within the ECU.
Position
1
2
Description
XMLCCID
44166
Hex Value
AC
86
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25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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