Request
UUDT
100
P2
CE
0
ECU Transmit
Tester Transmit
ECU NWL
Tester NWL
req
con
ind
req
con
ind
UUDT
req
con
ind
UUDT
req
con
ind
UUDT
req
con
ind
100
P2
CE
0
100
P2
CE
0
100
P2
CE
0
endOfDTCReport
message
general
P2CE timing
UUDT timing
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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
© Copyright 2010 General Motors All Rights Reserved
February 2010
Page 197 of 336
disabled while a DTC clear request is being processed. The algorithm shall be re-enabled after the DTC clear
event has completed. The DTC clear does not modify the count value calculated on the previous execution of
the algorithm so there is a good chance that a response message will be sent with the new count after the
DTC clear has completed.
8.18.2 Request Message Definition.
8.18.2.1 Request Message Definition - $Level $80 (readStatusOfDTCByDTCNumber) (Table 172).
Table 172: ReadDiagnosticInformation(ReadStatusOfDTCByDTCNumber) Request Message
Data Byte Parameter Name
Cvt
Hex Value Mnemonic
#1
ReadDiagnosticInformation Request Service Id
M
A9
SIDRQ
#2
sub-function = [
readStatusOfDTCByDTCNumber ]
M
80
LEV_
RSDTCBN
#3
#4
#5
DTCMaskRecord = [
DTCHighByte
DTCLowByte
DTCFailureTypeByte ]
M
xx
xx
xx
DTCMREC_
DTCH
DTCL
DTCFT
8.18.2.2 Request Message Definition - $Level $81 (readStatusOfDTCByStatusMask) (Table 173).
Table 173: ReadDiagnosticInformation(readStatusOfDTCByStatusMask) Request Message
Data Byte Parameter Name
Cvt
Hex Value Mnemonic
#1
ReadDiagnosticInformation Request Service Id
M
A9
SIDRQ
#2
sub-function = [
readStatusOfDTCByStatusMask ]
M
81
LEV_
RSDTCBS
#3
DTCMaskRecord = [
DTCStatusMask ]
M
xx
DTCMREC_
DTCSM
8.18.2.3 Request Message Definition - $Level $82 (sendOnChangeDTCCount) (Table 174).
Table 174: ReadDiagnosticInformation(sendOnChangeDTCCount) Request Message
Data Byte Parameter Name
Cvt
Hex Value Mnemonic
#1
ReadDiagnosticInformation Request Service Id
M
A9
SIDRQ
#2
sub-function = [
sendOnChangeDTCCount ]
M
82
LEV_
SOCDTCC
#3
DTCMaskRecord = [
DTCStatusMask ]
M
xx
DTCMREC_
DTCSM
8.18.2.4 Request Message Sub-Function Parameter $Level (LEV_) Definition.
The following definitions
apply to the sub-function levels of operation for service $A9 ReadDiagnosticInformation. All other sub-function
values are reserved for future definition within this specification. Future enhancements to this service, which
require UUDT responses, shall have sub-function parameter levels within the range from $80 thru $8F as this
range of UUDT responses are reserved for this service. See Table 175.
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
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