Technical Articles

What is ISO 14229-2:2016


The ISO 14229-2:2016 is a technical standard that defines the diagnostic communication protocol used for automotive electronics. This protocol helps in establishing a standardized communication between an automobile's on-board diagnostic system and various external diagnostic tools, such as scanners or software applications.

Key Features of ISO 14229-2:2016

The ISO 14229-2:2016 standard incorporates several key features that enhance the efficiency and effectiveness of diagnostic communications in the automotive industry:

Unified Diagnostic Services (UDS): UDS is a diagnostic specification that forms the foundation of ISO 14229-2:2016. It provides a standardized set of services and parameters for diagnostic communication.

Functional Units: The standard defines different functional units for diagnostic communication, such as the transport layer, network layer, and session layer. These units ensure reliable transmission of diagnostic messages.

Data Transmission: ISO 14229-2:2016 specifies the format and rules for transmitting diagnostic data between the in-vehicle systems and the external diagnostic tools. It defines protocols for request and response messages, allowing efficient diagnostic operations.

Error Handling and Recovery: The standard includes mechanisms for detecting and handling errors in the diagnostic communication process. It ensures robustness and reliability of the diagnostic procedures.

Benefits of ISO 14229-2:2016

The ISO 14229-2:2016 standard offers several benefits to the automotive industry:

Standardization: By providing a uniform diagnostic communication protocol, the standard enables seamless integration of various diagnostic tools and systems from different manufacturers.

Efficiency: The standardized protocol reduces the time required for diagnostic operations. It allows faster identification, analysis, and resolution of vehicle issues.

Interoperability: With ISO 14229-2:2016, automotive service providers can communicate with vehicles from different manufacturers using a single diagnostic tool. This simplifies the diagnostic process and improves service quality.

Future-proofing: The standard is designed to accommodate future advancements in automotive technology. It ensures compatibility with evolving vehicle systems, enabling diagnostic capabilities for upcoming features and functionalities.


The ISO 14229-2:2016 standard plays a crucial role in streamlining diagnostic communication in the automotive industry. By providing a unified and standardized protocol, it promotes efficiency, interoperability, and reliability in vehicle diagnosis. Adopting this standard ensures optimal utilization of diagnostic tools and facilitates effective maintenance and repair of automobiles.



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