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

Where: 
C1:
Byte 3 is present when the memoryAddress parameter contains 3 or 4 bytes. 
C2:
Byte 4 is present when the memoryAddress parameter contains 4 bytes. 
C3:
The size of the dataRecord parameter shall be at least one byte if the sub-function value is of type 
download and may be 0 bytes if the sub-function value is of type downloadAndExecuteOrExecute 
Note 1:
Byte1 in the memoryAddress parameter is always the most significant byte of the address and the last byte of the memoryAddress 
parameter (Byte2 for 2-byte addressing, Byte3 for 3-byte addressing, or Byte4 for 4-byte addressing) is always the least significant byte of 
the memoryAddress parameter. 
8.13.2.1 Request Message Sub-Function $Level Parameter Definition. 
The following definitions apply to 
the sub-function levels of operation for service $36 TransferData. All other sub-function values are reserved for 
future definition within this specification. See Table 139. 
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GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 163 of 336 
Table 139: Definition of Sub-function Values 
Hex 
Definition 
Cvt 
00 
Download 
This sub-parameter level of operation is used to command a node to receive a block 
transfer and (only) download the data received to the memory address specified in the 
startingAddress[] parameter. 
M 
80 
downloadAndExecuteOrExecute 
This sub-parameter level of operation is used to command a node to receive a block 
transfer, download the data received to the memory address specified in the 
startingAddress[] parameter, and execute the data (program) downloaded. This sub-
parameter command can also be used to execute a previously downloaded program by 
sending the request message with no data in the dataRecord[ ]. 
U