National Instruments CAN 372139B-01 - Manual (Page 75)

Chapter 5 Automotive Diagnostic Command Set API for LabVIEW
© National Instruments Corporation 5-49 Automotive Diagnostic Command Set User Manual
mode defines the type of DTCs to be read. The values are application
specific. The usual values are:
2: AllIdentified
3: AllSupported
group of DTC specifies the group of Diagnostic Trouble Codes to be read.
The following values have a special meaning, and you can specify them
through a ring control:
0x0000 All powertrain DTCs
0x4000 All chassis DTCs
0x8000 All body DTCs
0xC000 All network-related DTCs
0xFF00 All DTCs
error in is a cluster that describes error conditions occurring before the VI
executes. If an error has already occurred, the VI returns the value of the
error in cluster to error out.
status is TRUE if an error occurred. This VI is not executed when
status is TRUE.
code is the error code number identifying an error. A value of 0
means success. A negative value means error: the VI did not
execute the intended operation. A positive value means warning:
the VI executed intended operation, but an informational warning
is returned. For a description of the code, wire the error cluster to
a LabVIEW error-handling VI, such as the Simple Error
Handler.
source identifies the VI where the error occurred.
Output
diag ref out is a copy of diag ref in. You can wire it to subsequent
diagnostic VIs.
DTCs returns the resulting DTCs as an array of clusters:
DTC is the resulting Diagnostic Trouble Code. For the default
2-byte DTCs, you can use
DTC to String.vi to convert this to
readable format as defined by SAE J2012.