Страница 1 мировой engineering стандарты общая спецификация

m 
or 
n 
as described above in the data
dictionary, and 
element 
is one of the four types listed above.
The values for each element
of the DTC_Info structure
are described below:
1. $00 ≤ DTCH ≤
$FF
2. $00 ≤
DTCL ≤
$FF
3. $00 ≤
DTCFT ≤
$FF
4. $00 ≤
DTCSB ≤
$FF
8.18.6.2 Node Interface Pseudo Code.
Powerup States:
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---

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WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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February 2010
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DTC_send_on_change_flag ←
0
Level_81_Active ←
NO
Each time a $A9 message is received, the following logic is executed:
BEGINFUNCTION Serv_A9_Msg_Recvd()
/************************************************************************************
* Verify that a valid sub-function is being requested and that the message length is
* valid
*************************************************************************************/
IF (($Level not locally supported) OR
(($Level = $LEV_RSDTCBN) AND (message_data_length != $05)) OR /* $Level = $80 */
((message_data_length != $03) AND /* $Level = $82 or $81 and length not 3 */
(($Level = $LEV_ SOCDTCC) OR ($Level = $LEV_RSDTCBS)))) THEN
send Negative Response($7F $A9 $12)
ELSE
IF ((Node cannot service DTC request because read/write memory conflict) OR
(Tester’s request takes longer than P2
C 
ms to process)) THEN
send Negative Response($7F $A9 $78)
ENDIF
SELECT FIRST
/************************************************************************************
* Handle Message $80 Request “readStatusOfDtcByDtcNumber”
*************************************************************************************/
WHEN ($Level= $LEV_RSDTCBN)
dtc_found = FALSE
FOR (m ←
0 TO (total_num_local_dtcs - 1) BY 1)
IF ((DTC_Info[m].DTCH = $DTCH) AND (DTC_Info[m].DTCL = $DTCL) AND
(DTC_Info[m].DTCFT = $DTCFT)) THEN
dtc_found ←
TRUE
/* send UUDT positive response */
send ($80 $DTC_Info[m].DTCH $DTC_Info[m].DTCL
$DTC_Info[m].DTCFT $DTC_Info[m].DTCSB)
m ←
total_num_local_dtcs /* exit FOR loop */