Purpose

Executes the UDS DiagnosticSessionControl service. The ECU is set up in a specific diagnostic mode.

Format 

        long ndUDSDiagnosticSessionControl(
       TD1 *diagRef,
       unsigned char mode,
       LVBoolean *success);

Input

diagRef

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

mode

Indicates the diagnostic mode into which the ECU is brought. The values are application specific. The usual values are:

01: defaultSession

02: ECUProgrammingSession

03: ECUExtendedDiagnosticSession Output

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.