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

GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 270 of 336 
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The Module Id is $02. 
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The calibration part number is 12345678. 
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The Design Level Suffix or Alpha Code is $AA. 
The header for this example would contain the following information (Table 226): 
Table 226: Calibration Module Header Data for Example 3 
Offset 
Number 
of Bytes 
Description 
$00 
2 
Module checksum or CRC (hex) = $xx xx 
$02 
2 
Module ID = $00 02 
$04 
1 
Header Format Identifier = $21 
$05 
4 
SWMI (part # 12345678) = $00 BC 61 4E 
$09 
2 
Alpha Code = AA ($41 41) 
$0B 
1 
NOAR = $01 
$0C 
4 
Starting address of memory region = $00 00 80 00 
$10 
4 
Length of memory region = $00 00 10 00 
9.3.4 Utility File Requirements. 
All utility files shall meet the requirements specified in the Service 
Programming System (SPS) Interpreter Programmers Reference Manual. 
Utility files shall be designed such that calibrations are reprogrammed any time there is a change to the 
operational software. If the ECU contains multiple microprocessors (each with their own operational software 
and calibrations), then the utility file shall be designed such that calibrations are always reprogrammed on a 
microprocessor any time that that same processors operational software is programmed. Utility file design 
requirements (for multi-processor ECUs) relative to the reprogramming of operational software and/or 
calibrations of one processor when a second processor is reprogrammed shall be specified in the CTS (or 
SSTS or supplemental diagnostic specification referenced by either of the preceeding documents). 
Utility files released to the assembly plant or service shall be in binary format. The Module ID for the 
Programming Utility data file shall be $00.