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 162 of 336 
information in the utility file (reference the programming chapter within this specification and also the 
Interpreter Specification listed in the Normative References section of this specification for more details). 
8.13.2 Request Message Definition. 
Table 138 defines the structure of the TransferData request message. 
Note:
A request message must always include the sub-function parameter level of operation AND a starting 
address. Additional data bytes beyond the starting address are optional and would not be present in the case 
of a request to execute a previously downloaded block of data. 
The starting address parameter (startingAddress) can be two, three, or four bytes based on the ECU internal 
addressing scheme. All TransferData requests to the same ECU shall use the same number of bytes in the 
startingAddress parameter (independent of the actual address value). During SPS programming, the 
programming tool determines the number of bytes to use in the startingAddress parameter from information in 
the utility file. 
Table 138: TransferData Request Message 
Data Byte 
Note 1
 
Parameter Name 
Cvt 
Hex Value Mnemonic 
#1 
TransferData Request Service Id 

36 
SIDRQ 
#2 
sub-function = [
download 
downloadAndExecuteOrExecute] 

00 
80 
LEV_ 
DL 
DLEXOE 
#3 
#4 
#5 
#6 
startingAddress[] = [
Byte1 - MSB 
Byte2 
Byte3 
Byte4 ] 


C1 
C2 
xx 
xx 
xx 
xx 
SA_B1 
SA_B2 
SA_B3 
SA_B4 
#5/6/7 

#n 
dataRecord[] = [ 
data byte #1 

data byte #m (where m 
≤ 4093 minus the 
number of bytes in the 
startingAddress) ] 
C3 
yy 

zz 
DREC_ 
DATA_1 

DATA_m 

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