Страница 1 мировой engineering стандарты общая спецификация

8.3.2 Request Message Definition (Table 56).
Table 56: ReadFailureRecordData Request Message
Data Byte Parameter Name
Cvt Hex Value Mnemonic
#1
ReadFailureRecordData Request Service Id
M
$12
SIDRQ
#2
sub-function = [
readFailureRecordIdentifiers
readFailureRecordParameters ]
M
$01
$02
LEV_
RFRI
RFRP
#3
#4
#5
#6
failureRecordIdentifier = [
failureRecordNumber
DTCHighByte
DTCLowByte
DTCFailureTypeByte ]
M
1
Note 1
xx
xx
xx
xx
FRDTCIREC
FRN
DTCHB
DTCLB
DTCFT
Note 1: M
1 
= Bytes 3 thru 6 are mandatory if the sub-function parameter is readFailureRecordParameters ($02). They are not included in
the request message if the sub-function parameter is readFailureRecordIdentifiers ($01).
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
Page 85
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.3.2.1 Request Message Sub-Function Parameter $Level (LEV_) Definition. 
The following sub-function
$levels (LEV_) of operation are defined for service $12 ReadFailureRecordData (Table 57):
Table 57: Definition of Sub-function Values
Hex Description
Cvt
$01
readFailureRecordIdentifiers
Allows a tester to read the failureRecordDataStructureIdentifier and the failure record
identifiers. A failure record identifier is made up of a failure record number and a DTC
identifier.
Note: 
This level is only used to obtain the failureRecordDataStructureIdentifier parameter
and the failure record identifiers. The data bytes contained within a particular failure
record are retrieved with the readFailureRecordParameters ($02) level of service.
M
$02