National Instruments CAN 372139B-01 - Manual (Page 60)

Chapter 5 Automotive Diagnostic Command Set API for LabVIEW
Automotive Diagnostic Command Set User Manual 5-34 ni.com
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.
Description
This VI clears the diagnostic information on the ECU memory. If the group of DTC
parameter is present, the ECU is requested to clear all memory including the DTCs.
For further details about this service, refer to the ISO 14230-3 standard.