Volvo B6324S Functional Description page 20

MY07
Vehicle: S80, XC90
Engine: B6324S
Request on-board monitoring test results for specific monitored
systems
The purpose of this service is to allow access to the results for on-board
diagnostic monitoring tests of specific components / systems that are conti-
nuously monitored (e.g. misfire monitoring) and non-continuously monitored
(e.g. catalyst system).
The request message for test values includes an On-Board Diag ostic Mo-
nitor ID, see Annex D (ISO/DIS 15031-5.3) that indicates the information
requested. Unit and Scaling information is included in Annex E (ISO/DIS
15031-5.3).
The vehicle manufacturer is responsible for assigning "Manufacturer Defined
Test IDs" for different tests of a monitored system. The latest test values
(results) are to be retained, even over multiple ignitions OFF cycles, until re-
placed by more recent test values (results). Test values (results) are requested
y On-Board Diagnostic Monitor ID. Test values (results) are always repor-
ted with the Minimum and Maximum Test Limits. The Unit and Scaling ID
included in the response message defines the scaling and unit to be used by
the external test equipment to display the test values (results), Minimum Test
Limit, and Maximum Test Limit information.
If an On-Board Diagnostic Monitor has not been completed at least once
since Clear/reset emission-related diagnostic information or battery discon-
nect, then the parameters Test Value (Results), Minimum Test Limit, and
Maximum Test Limit shall be set to zero $00) values.
Not all On-Board Diagnostic Monitor IDs are applicable or supported by
Mode $06 Data
all systems. On-Board Diagnostic Monitor ID $00 is a bit-encoded value that
indicates for each ECU which On-Board Diagnostic Monitor IDs are sup-
ported. On-Board Diagnostic Monitor ID $00 indicates support for On-Board
Diagnostic Monitor IDs from $01 to $20. On-Board Diagnostic Monitor ID
$20 indicates support for On-Board Diagnostic Monitor IDs $21 through $40,
etc. This is the same concept for PIDs/TIDs/InfoTypes support in services
$01, $02, $06, $08, and $09. On-Board Diagnostic Monitor ID $00 is required
for those ECUs that respond to a corresponding service $06 request message
as specified in Annex A ISO/DIS 15031-5.3). On-Board Diagnostic Monitor
ID $00 is optional for those ECUs that do not respond to additional service
$06 request messages.
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