Purpose

Executes the ClearDiagnosticInformation service and clears selected Diagnostic Trouble Codes (DTCs). Format

Input

DTC descriptor is a cluster that describes the DTC records the ECU delivers:
DTC Byte Length indicates the number of bytes the ECU sends for each DTC. The default is 2.
Status Byte Length indicates the number of bytes the ECU sends for each DTC's status. The default is 1.
Add Data Byte Length indicates the number of bytes the ECU sends for each DTC's additional data. Usually, there is no additional data, so the default is 0.
Byte Order indicates the byte ordering for multibyte items:
0:MSB_FIRST (Motorola) (default)
1:LSB_FIRST (Intel)
The DTC descriptor is given here as a parameter basically to convert the group of DTC parameter to a binary representation according to DTC Byte Length and Byte Order.
diag ref in specifies the diagnostic session handle, obtained from Open Diagnostic on CAN FD.vi or Open Diagnostic on IP.vi and wired through subsequent diagnostic VIs. Normally, it is not necessary to manually manipulate the elements of this cluster.
group of DTC specifies the group of Diagnostic Trouble Codes to be cleared. The following values have a special meaning, and you can specify them through a ring control:
0x0000All powertrain DTCs
0x4000All chassis DTCs
0x8000All body DTCs
0xC000All network-related DTCs
0xFF00All 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.
success? indicates successful receipt of a positive response message for this diagnostic service.
error out describes error conditions. If the error in cluster indicated an error, the error out cluster contains the same information. Otherwise, error out describes the error status of this VI.
status is TRUE if an error occurred.
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.