Страница 1 мировой engineering стандарты общая спецификация

Table 46: ClearDiagnosticInformation Targeted to Functional System
T = Frame Sent By Tester; N = Frame Sent By Node; shaded region indicates PCI
Frame Type CAN Id
#1
#2
#3
#4
#5
#6
#7
#8
T(USDT-SF)
$101
$FD
$01
$04
---
---
---
---
---
N(USDT-SF)
$641
$01
$44
---
---
---
---
---
---
N(USDT-SF)
$642
$01
$44
---
---
---
---
---
---
8.1.6 Node Interface Function.
8.1.6.1 Node Interface Data Dictionary (Table 47).
Table 47: Node Interface Data Dictionary of ClearDiagnosticInformation Service Pseudo Code
Variable/Meaning
Values
message_data_length
Reference Common/Global Pseudo Code
Data Dictionary For Definition Of These
Flags/Variables
8.1.6.2 Node Interface Pseudo Code. 
The following logic is executed upon receipt of a
ClearDiagnosticInformation ($04) service request message:
Powerup States:
None
Each time a $04 message is received, the following logic is executed:
BEGINFUNCTION Serv_04_Msg_Recvd()
IF (message_data_length != 1) THEN
send Negative Response ($7F $04 $12) /* SubfunctionNotSupported-InvalidFormat */
ELSE
IF (conditions are not correct to clear diagnostic information) THEN
send Negative Response ($7F $04 $22) /* ConditionsNotCorrect */
ELSE
IF (the ECU cannot continue to process diagnostics while the DTC clear is in process) THEN
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
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send Negative Response ($7F $04 $78) /* RequestCorrectlyReceived-ResponsePending */
Clear DTC status information to be used by $A9 service
Clear Freeze Frame and Failure Record DTC Data
Reset any DTC related timers, flags, counters, etc.
send ($44) response
ELSE
send ($44) response
Clear DTC status information to be used by $A9 service
Clear Freeze Frame and Failure Record DTC Data
Reset any DTC related timers, flags, counters, etc.
ENDIF
ENDIF
ENDIF
ENDFUNCTION