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 273 of 336 
9.4.2 Retrieve SPS Data Process. 
This process is performed to retrieve the proper SPS data out of the SPS 
database. See Table 228. 
Note:
For service, this process uses the information retrieved during the Read Identification Information 
process to retrieve the SPS data out of the SPS database. 
Table 228: Steps of the Retrieve SPS Data Process Programming Session 
Step 
Action 
11 
Connect tester to SPS database. 

Select node(s) to be programmed. 

If node replacement, identify information (if necessary) to be retrieved from the old ECU to transfer 
to the new ECU 
Note 1


Generate security key(s). 

Retrieve SW/CAL Modules to download. 
12 
Reconnect tester. 
Note 1:
For remote programming, where an ECU is replaced and requires data read from the old ECU and written into the replacement 
ECU the technician must connect to the SPS database twice. The first time is to identify which data must be read from the old ECU, the 
second time is to generate the key for the replacement ECU and to retrieve the software/calibration file(s) to be downloaded. 
9.4.3 Programming Session. 
(Figure 39)
 
The Programming Session consists of two distinct types of 
diagnostic service executions: 
1. 
Master Execute. 
All steps required to start a programming event and all steps required to be synchronized 
between multiple utility files running in parallel are executed only once (master execute). Those steps are 
the ones defined for the 
Pre-Utility File Process
and the synchronization between the utility file at the 
point in time when the utility file reaches the point where a SW-reset of the physical ECU is required to 
finalize the programming of this node (conclusion of the programming event). All steps controlled by the 
master execute are vehicle oriented steps (functionally addressed to all nodes). 
2. 

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