Description – National Instruments CAN 372139B-01 User Manual

Page 229

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Chapter 6

Automotive Diagnostic Command Set API for C

© National Instruments Corporation

6-65

Automotive Diagnostic Command Set User Manual

Description

This function enables different ECU diagnostic modes. The possible diagnostic modes are not
defined in ISO 14230 and are application specific. A diagnostic session starts only if
communication with the ECU is established. For more details about starting communication,
refer to ISO 14230-2. If no diagnostic session is requested after

ndOpenDiagnostic

, a

default session is enabled automatically in the ECU. The default session supports at least the
following services:

The StopCommunication service (refer to

ndCloseDiagnostic

and the ISO 14230-2

standard).

The TesterPresent service (refer to

ndTesterPresent

and the ISO 14230-3 standard).

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