National Instruments CAN 372139B-01 - Manual (Page 214)

Chapter 6 Automotive Diagnostic Command Set API for C
Automotive Diagnostic Command Set User Manual 6-50 ni.com
6 testNotCompletedThisMonitoringCycle
7 warningIndicatorRequested
AddData contains optional additional data for this DTC. Usually, this does not
contain valid information (refer to DTCDescriptor ).
len
On input, len must contain the DTCs array length in elements. On return, it contains the
number of valid elements in the DTCs array.
success
Indicates successful receipt of a positive response message for this diagnostic service.
Return Value
The return value indicates the function call status as a signed 32-bit integer. Zero means the
function executed successfully. A negative value specifies an error, which means the function
did not perform the expected behavior. A positive value specifies a warning, which means the
function performed as expected, but a condition arose that may require attention.
Use the ndStatusToString function to obtain a descriptive string for the return value.
Description
This function reads diagnostic trouble codes by status from the ECU memory. If you set the
optional
groupOfDTC parameter to the above specified codes, the ECU reports DTCs only
with status information based on the functional group selected by groupOfDTC .
For further details about this service, refer to the ISO 14230-3 standard.