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


GM WORLDWIDE ENGINEERING STANDARDS



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GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 215 of 336 
Table 192: Definition and Valid Ranges Of DPID Parameters 
Hex 
Description 
Cvt 
Mnemonic 
00 
ReservedByDocument 
This value is used to indicate that one or more of the scheduled DPIDs are 
being stopped. No data is ever sent with this DPID number. 

RBD 
80 thru 
8F 
ReservedByDocument 
These values are not allowed because the DPID number occupies the message 
number position in a UUDT message and the $A9 service also uses the 
message number position in a UUDT message to provide an echo of the 
sub-function parameter. The range of message numbers from $80 thru $8F are 
reserved for DTC responses. 

RBD 
01 thru 
7F, 
90 thru 
FE 
DPID 
DPIDs can be either static or dynamically definable. Dynamically definable 
DPIDs (see service $2C for more detail) shall start with DPID number $FE and 
be numbered sequentially backwards. Static DPIDs (DPIDs whose 
signal/parameter content is determined at the time of ECU software compilation) 
shall start with DPID number $01 and be numbered sequentially forwards. 

DPID 
FF 
ReservedByDocument 
This value is reserved for future definition. 

RBD 
8.19.3 Positive Response Message Definition. 
Positive responses to this service are UUDT message(s). 
The first byte of a UUDT diagnostic message contains a message number. For this service, the DPID# 
occupies the message number field. The number of data bytes after the message number depends on the sub-
function parameter value or the DPID requested. If sub-function parameter ($Level) $00 is requested, then the 
response message contains only the message number (DPID $00) and no additional data as illustrated by 
Table 193. 

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