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



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gmw3110

9.3.2.4.3.1 Pseudo Code. 
(Refer to the data dictionary of the application implementation of this service for 
variable definitions.) 
BEGINFUNCTION Boot_20_Msg_Recvd() 
CALL Boot_Exit_Diagnostic_Services() /* procedure defined below to gracefully exit all active diagnostic 
services */ 
ENDFUNCTION 
Each time a valid $20 message is received, or if a TesterPresent timeout occurs, the following function is 
called: 
BEGINFUNCTION Boot_Exit_Diagnostic_Services() 
Service_28_MsgReceived 

NO 
TesterPresent_Timer_State 

INACTIVE 
TesterPresent_Timer 


IF (permanent diagnostic CAN Identifiers are not programmed) THEN /* For SPS_TYPE_C ECUs */ 
diagnostic_responses_enabled 

NO 
ENDIF 
IF (programming_mode_active = YES) THEN 
TransferData_Allowed 

NO 
programming_mode_active 

NO 
/***************************************************************************
* Reset CAN Protocol Device if high speed mode was active before doing
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
CameraLoops.com


GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 257 of 336 
* S/W Reset 
**************************************************************************/ 
IF (high_speed_mode_active = YES) 
high_speed_mode_active 

NO 
CALL hnd_Init_CAN_Device() /* handler call to reinit the baud rate in order to prevent bus errors which 
could be caused if reset times differ greatly*/ 
ENDIF 
CALL Invoke_Sw_Reset() /* causes a software reset to occur */ 
ENDIF 
ENDFUNCTION 
Note:
The above pseudo code assumes that the ECU is unlocked when operating out of the boot software. 

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