Страница 1 мировой engineering стандарты общая спецификация

8.9.6.2 Node Interface Pseudo Code.
Powerup States:
None
Each time a $28 message is received, the following logic is executed:
BEGINFUNCTION Serv_28_Msg_Recvd()
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
IF (message_data_length != 1) THEN
IF (diagnostic_responses_enabled = YES) THEN
Reject the request with a ($7F $28 $12) for invalid format
ENDIF
ELSE
IF (Device cannot disable normal communications at this time) THEN
/* do not need to check if diag resp enabled here because if they are not, then there would be no
reason why the device would not already have disabled normal comm */
Reject the request with a ($7F $28 $22) for conditions not correct
ELSE
Diag_Services_Disable_DTCs ←
TRUE
normal_message_transmission_status ←
DISABLED
CALL hnd_halt_normal_comm() /* handler call to halt normal comm */
TesterPresent_Timer_State ←
ACTIVE
IF (diagnostic_responses_enabled = YES) THEN
Send ($68) response message
ENDIF
ENDIF
ENDIF
ENDFUNCTION
8.9.7 Node Verification Procedure. 
Perform procedures 1 and 2 below on devices that are completely
programmed (SPS_TYPE_A ECU).
Procedure 1:
1. Send a DisableNormalCommunication request with data bytes after the Service Id and verify the negative
response ($7F $28 $12) message is sent.
2. Send a DisableNormalCommunication request message at a time when the device cannot disable Normal
Mode communication and verify the negative response ($7F $28 $22) message is sent. (This is only
required for devices which support such a situation.)
Procedure 2:
1. Verify that the device has no 
Current 
or 
History 
DTCs stored (use $A9 service).
2. Send a DisableNormalCommunication request message. Keep mode active with Tester present messages
(mode $3E) for at least 2 minutes. Verify that all Normal Mode communications are disabled.
3. Stop sending TesterPresent messages and wait P3
Cmax 
ms. Verify that normal communications are
reinitialized.
4. Verify that the device has no