BS ISO 14230-2:2016 specifies data link layer services tailored to meet the requirements of UART-based vehicle communication systems on K-Line as specified in ISO 14230-1. It has been defined in accordance with the diagnostic services established in ISO 14229-1 and ISO 15031-5, but is not limited to use with them and is also compatible with most other communication needs for in-vehicle networks. The protocol specifies an unconfirmed communication.

The diagnostic communication over K-Line (DoK-Line) protocol supports the standardized service primitive interface as specified in ISO 14229-2.

This document provides the data link layer services to support different application layer implementations like the following:

• enhanced vehicle diagnostics (emissions-related system diagnostics beyond legislated functionality, non-emissions-related system diagnostics);
• emissions-related OBD as specified in ISO 15031, SAE J1979-DA and SAE J2012-DA;
• in addition, this document clarifies the differences in initialization for K-line protocols defined in ISO 9141 and ISO 14230. This is important since a server supports only one of the protocols mentioned above and the client has to handle the coexistence of all protocols during the protocol determination procedure.

Cross References:
ISO 14230-4
ISO/IEC 7498-1
ISO 9141-2:1989
ISO/IEC 10731
ISO 11898-1
ISO 11898-2
ISO 13400
ISO 14229-2
ISO 14229-6
ISO 14230-1
ISO 14230-4
ISO 15031-4
ISO 15031-2
ISO 15031-5
ISO 15031-6
ISO 15765-2
ISO 15765-4
ISO 27145-2
ISO 27145-3
ISO 27145-4
SAE J1930-DA
SAE 1939DA
SAE J1939-73:2010
SAE J1979-DA
SAE J2012-DA


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