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 19 of 336 
 
 
Supported in: 
Diagnostic Service Name 
REQ 
SID 
Diagnostics 
Programming 
Boot 
CANId 
(Test Mode) 
(hex) 
 
(SPS) 
Memory 
Type 
ReadDiagnosticInformation 
A9 
M
5
N/A 
UUDT 
ReadDataByPacketIdentifier 
AA 
C 
N/A 
UUDT 
DeviceControl 
AE 
C 
N/A 
USDT 
Where: 
M
1
= This service shall be supported by all ECUs which log DTCs. 
M
2
= Boot Memory is only required to support the Data Identifiers (DIDs) which are necessary to program the 
ECU when the ECU only contains boot software. 
M
3
= Mandatory for all programmable nodes which are Emission, Safety, or Theft related, or otherwise 
required by law. 
M
4
= This service is required in boot if it is necessary to write information (e.g., option content) into an ECU 
before the software reset at the end of the programming event. 
M
5
= This service shall be mandatory for all ECUs which log DTCs. For applicable ECUs, support of 
sub-function parameter $81 (readStatusOfDTCByStatusMask) shall be mandatory, and the functionality 
provided by the other sub-functions shall be agreed upon by the DRE, service and manufacturing 
representatives. 
C
1
= The wakeUpLinks (sub-function parameter = $04) may be required for gateway devices that are 
connected to a subnet that supports a wake-up feature that is not available to the tester (e.g., wake-up 
wire not brought out to the Diagnostic Link Connector (DLC)). If the gateway device is SPS 
programmable and required to support the wakeUpLinks sub-function parameter, then it shall also 
support the wakeUpLinks sub-function in boot software. Which sub-functions of this service that an ECU 
is required to support must be agreed upon by the DRE, service and manufacturing representatives.