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

9.3.2.4.1 Service $10 - InitiateDiagnosticOperation. 
This service is only required for a gateway ECU 
connected to a GMLAN subnet which utilizes a wake-up mechanism that is not available to the tool (e.g., 
wake-up wire not brought out to the DLC). In this case, the gateway ECU shall support the sub-function 
parameter $04 (wakeUpLinks). 
9.3.2.4.1.1 Pseudo Code. 
(Refer to the data dictionary of the application implementation of this service for 
variable definitions.)
 
BEGINFUNCTION Boot_10_Msg_Recvd() 
IF ($Level = LEV_WUPLNK ) THEN 
IF (more than P2
C
is needed to process this request) THEN 
send Negative Response ($7F $10 $78) /* request correctly received - response pending */ 
ENDIF 
generate wake-up on all GMLAN links where wake-up mechanism is supported
Send ($50) positive response message 
ENDIF 
ENDFUNCTION 
9.3.2.4.2 Service $1A - ReadDatabyIdentifier. 
This service shall be supported so a programming tool can 
determine the correct file(s) needed for programming. 
The following DIDs shall be supported when executing out of the Boot Software: 

DID $B0 for determining the ECU Diagnostic Address (except for SPS_TYPE_C ECUs). 

DIDs as required for determining the ECU Base Model part number. Minimum DIDs $CC and $DC. 
Support of DID $92 is optional and shall be specified in the CTS (or SSTS or supplemental diagnostic 
specification referenced by the CTS or SSTS) if needed. 

The boot software shall be capable of reporting the Software Module Identifier (SWMI) and the Software 
Module Identifier Alpha Code (SWMIAC) DIDs associated with operational software module(s) once the 
operational software is programmed into the ECU. 
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