National Instruments CAN 372139B-01 - Manual (Page 256)

Chapter 6 Automotive Diagnostic Command Set API for C
Automotive Diagnostic Command Set User Manual 6-92 ni.com
AddDataByteLength indicates the number of bytes the ECU sends for each DTC’s
additional data. For this subfunction, the default is 2.
ByteOrder indicates the byte ordering for multibyte items:
0: MSB_FIRST (Motorola), default
1: LSB_FIRST (Intel)
This function interprets the response byte stream according to this description and
returns the resulting DTC records in the
DTCs struct array.
Output
statusAvailMask
An application-specific value returned for all DTCs.
DTCs
Returns the resulting DTCs as an array of structs:
typedef struct {
unsigned long DTC;
unsigned long Status;
unsigned long AddData;
} TD4;
DTC is the resulting Diagnostic Trouble Code. For the default 2-byte DTCs, use
ndDTCToString to convert this code to readable format as defined by SAE J2012.
Status is the DTC status. Usually, this is a bit field with following meaning:
Bit Meaning
0 testFailed
1 testFailedThisMonitoringCycle
2 pendingDTC
3 confirmedDTC
4 testNotCompletedSinceLastClear
5 testFailedSinceLastClear
6 testNotCompletedThisMonitoringCycle
7 warningIndicatorRequested
AddData contains optional additional data for this DTC.