General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode SpecificationTable 193: ReadDataByPacketIdentifier, $Level = |
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Data Byte Parameter Name Cvt Hex Value Mnemonic #1 MessageNumber = [stopSendingPositiveResponse] M 00 DPID_ --``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`--- CameraLoops.com GM WORLDWIDE ENGINEERING STANDARDS GMW3110 © Copyright 2010 General Motors All Rights Reserved February 2010 Page 216 of 336 If the request message contains any other sub-function parameter ($Level) value, then the positive response message contains the DPID number requested and data bytes associated with that DPID, as illustrated by Table 194. Table 194: ReadDataByPacketIdentifier, $Level = $01, $02, $03, or $04 Positive Response Message Data Byte Parameter Name Cvt Hex Value Mnemonic #1 MessageNumber = [ DPID#] M 01 thru 7F, or 90 thru FE DPID_ #2 dataRecord = [ Data Byte #1 M 2 xx DB_1 : : : : : #8 Data Byte #7] U xx DB_7 Where: M2 = This byte shall always be present for static DPIDs. For dynamic DPIDs this byte shall always be present once the DPID contents have been assigned via the $2C service. The number of bytes transmitted in the data record shall be 0 for a given dynamic DPID if that DPID had not previously been defined via the $2C service. 8.19.3.1 Response Message Data Parameter Definition. Table 195 specifies the data parameter definitions for this service. Table 195: Response Message Data Parameter Definition Definition MessageNumber This data byte of a UUDT response from this diagnostic service contains the DPID number which identifies to the tool the meaning of the remaining data bytes in the message. dataRecord[] These are the bytes containing the actual operating data values for each of the signals (e.g., PIDs) assigned as part of the specific DPID requested. CameraLoops.com |