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 132 of 336 
ELSE 
send a ($7F $27 $35) message 
ENDIF 
ELSE 
Security_Access_Unlocked 

TRUE 
TesterPresent_Timer_State 

ACTIVE 
SPS_Bad_Key_Counter 

2 
Send ($67 $02 ) message. 
ENDIF 
ELSE 
send Negative Response ($7F $27 $22) /*Sequence Error */ 
ENDIF 
WHEN ($Level=$03) 
IF (Security_Delay_Timer > 0) THEN 
Send ($7F $27 $37) /* Time Delay Not Expired */ 
ELSE IF ((Dev_Cntrl_Active = YES) AND 
(DeviceContol_Security_Level = SERVICE)) THEN 
send ($7F $27 $22) /* conditions not correct or sequence error*/ 
ELSE 
IF ((DeviceContol_Security_Level = ASSEMBLY_PLT) OR 
(manufacturers_enable_counter > 0) OR 
(Vulnerability_flag=$FF)) THEN 
DeviceContol_Security_Level 

ASSEMBLY_PLT 
TesterPresent_Timer_State 

ACTIVE
Send ($67 $03 $00 $00) message 
ELSE 
DevCtrl_Security_Key_Allowed 

TRUE 
Send ($67 $03 $Seed) message 
ENDIF 
ENDIF 
WHEN ($Level=$04) 
IF (DevCtrl_Security_Key_Allowed = FALSE) THEN 
send ($7F $27 $22) /* conditions not correct or sequence error*/ 
DevCtrl_Security_Key_Allowed 

FALSE 
ELSE
DevCtrl_Security_Key_Allowed 

FALSE 
IF ($Key does not match stored key) THEN 
DevCtrl_Bad_Key_Counter 

DevCtrl_Bad_Key_Counter - 1 
IF (DevCtrl_Bad_Key_Counter = 0) THEN 
Security_Delay_Timer

10 s 
DevCtrl_Bad_Key_Counter 

1 
send ($7F $27 $36) /* for Exceeded Number Of Attempts */ 
ELSE 
send a ($7F $27 $35) message 
ENDIF 
ELSE 
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