Purpose

Closes a diagnostic session.

Format 

        long ndCloseDiagnostic(
       TD1 *diagRefIn);

Input

diagRefIn

Specifies the diagnostic session handle, obtained from ndOpenDiagnosticOnCANFD and passed to subsequent diagnostic functions. Normally, it is not necessary to manually manipulate the elements of this struct. Output

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

The diagnostic session diagRefIn specifies is closed, and you can no longer use it for communication to an ECU. 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 ndStopDiagnosticSession) before calling ndCloseDiagnostic.