Close Diagnostic.vi
- Updated2025-10-07
- 3 minute(s) read
Purpose
Closes a diagnostic session. Format
Input
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diag ref in specifies the diagnostic session handle, obtained from Open Diagnostic on CAN FD.vi and wired through subsequent diagnostic VIs. Normally, it is not necessary to manually manipulate the elements of this cluster. | ||||||
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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.
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Output
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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.
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Description
The diagnostic session specified by diag ref in is closed, and you can no longer use it for communication to an ECU. Note that this command does not communicate the closing to the ECU before terminating; if this is necessary, you must manually do so (for example, by calling StopDiagnosticSession.vi) before calling Close Diagnostic.vi.





