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 245 of 336 
IF ((Valid_CPID = NO) OR
((Secure_CPID = YES) AND (Security_Access_Unlocked=FALSE)) OR ((SecurityAccessCode_CPID = 
YES) AND (Security_Access_Allowed=FALSE))) THEN 
send Negative Response ($7F $AE $31) /* Request Out Of Range. */ 
ELSE IF (Valid_CPID_Data_Length = NO) 
send Negative Response ($7F $AE $12) /* Invalid Format. */ 
/* Note: there is a flag in mode $27 (DeviceContol_Security_Level) which is used to determine if the 
assembly plant or service device control restrictions apply */ 
ELSE IF (($CPID attempts to control outside device
’s acceptable range) OR (Device conditions prohibit 
requested control)) THEN 
send Negative Response ($7F $AE $E3 $xx $yy) /*Device Control Limits Exceeded*/ 
Dev_Cntrl_Active 

NO 
Set all the individual device control status flags to FALSE. 
ELSE IF ($CPID = $00) THEN 
Dev_Cntrl_Active 

NO 
Set all the individual device control status flags to FALSE 
Send ($EE $00 ) 
ELSE 
TesterPresent_Timer_State 

ACTIVE 
IF (the following logic cannot be completed within P2
C
ms.) THEN 
send a Negative Response ($7F $AE $78) /*RequestCorrectlyReceived-ResponsePending */ 
ENDIF 
Send ($EE $CPID) 
Dev_Cntrl_Active 

YES 
IF (DTCs_Enabled_In_Device_Control = NO) THEN
Diag_Services_Disable_DTCs 

TRUE 
ENDIF 
Set the appropriate device control status flags which are used by the 
individual control functions to TRUE. 
ENDIF 
ENDIF 
ENDFUNCTION 
/* The following logic is executed in a background loop and can also be called based on a TesterPresent $3E 
timeout or upon receipt of a ReturnToNormalMode ($20) service request. */ 
BEGINFUNCTION Background_DeviceControl_Logic( ) 
IF ((Dev_Cntrl_Active = YES) AND (request_DeviceControl_exit = NO)) THEN 
/* Note: there is a flag in mode $27 (DeviceContol_Security_Level) which is used to determine if the 
assembly plant or service device control restrictions apply */ 
IF (Device conditions are outside of device
’s acceptable range) THEN 
send a Negative Response ($7F $AE $E3 $xx $yy) /* Device Control Limit Exceeded */ 
Dev_Cntrl_Active 

NO 
set all the individual device control status flags to FALSE 
ELSE 
remain in device control 
ENDIF 
ELSE IF ((Dev_Cntrl_Active = YES) AND (request_DeviceControl_exit = YES)) THEN 
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