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

 
FALSE 
TRUE/FALSE 
DTCs_Enabled_In_Device_Control 
This flag is used to determine whether or not the service $AE 
(DeviceControl) will request DTCs to disable when device control is 
active. When this flag is equal to NO, activating service $AE would 
inhibit the setting of DTCs. Service $10 (InitiateDiagnosticOperation) 
can be used to change the state of this flag if it is requested prior to 
activating device control.
 
NO 
YES/NO 
Security_Access_Unlocked 
Flag set in service $27 (SecurityAccess) which indicates if the device 
is unlocked. If an ECU does not support the $27 Security service, then 
this flag shall default to TRUE for the purposes of the pseudo code for 
the other modes.
 
FALSE 
TRUE/FALSE 
manufacturers_enable_counter 
This is a one byte variable used when determining the security status 
of a node which implements the SecurityAccess ($27) service. Refer 
to 9.3.2.6.2 for a description of this variable
. 
N/A 
$00 thru $FF 
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GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
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February 2010 
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Variable/Meaning
Power 
Up - S/W 
Reset 
Initial 
Value 
Values 
vulnerability_flag 
The vulnerability_flag is a one byte variable in the Node
’s calibration 
area which is used when determining the security status of a node 
which implements the SecurityAccess ($27) service. Refer to 9.3.2.6.1 
for a description of this variable.
 
N/A 
$00 thru $FF