ISO 13400-2-2019 PDF

Full title and description

Road vehicles — Diagnostic communication over Internet Protocol (DoIP) — Part 2: Transport protocol and network layer services. This part of ISO 13400 specifies transport-layer and network-layer requirements for diagnostic communication between a client DoIP entity (test equipment) and server(s) in a vehicle using IP, TCP and UDP. It defines vehicle gateway behaviours, vehicle discovery and announcement, IP address assignment, routing to vehicle sub-components, connection management, error handling, and optional security and monitoring features.

Abstract

ISO 13400-2:2019 defines mandatory and optional features to enable secured and unsecured diagnostic communication over Internet Protocol between external diagnostic tools and in-vehicle servers/gateways. Mandatory topics include vehicle network integration (IP addressing), discovery/announcement, basic vehicle status retrieval, connection establishment and maintenance, routing to sub-components and error handling. Optional topics cover DoIP entity status monitoring, Transport Layer Security (TLS) and firewall capabilities for DoIP entities. The document supports both TCP and UDP transport.

General information

• Status: Withdrawn (replaced by ISO 13400-2:2025)
• Publication date: December 2019 (ISO 13400-2:2019); Amendment 1 published July 2023; superseded by ISO 13400-2:2025 (June 2025).
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 43.180 (Diagnostic, maintenance and test equipment); 43.040.10 (Electrical and electronic equipment)
• Edition / version: Edition 2 (2019); amended by ISO 13400-2:2019/Amd 1:2023; superseded by Edition 3 (ISO 13400-2:2025).
• Number of pages: 78

Scope

This part specifies requirements for diagnostic communication over IP between client DoIP entities (for example diagnostic testers or service tools) and server(s) installed in road vehicles. It covers IP-based transport (TCP/UDP), vehicle gateway and test-equipment behaviours needed to detect and establish communication, to route diagnostic data to/from vehicle sub-components, to manage connections through different vehicle states (including diagnostic power modes), and to handle network errors. The document separates features into mandatory and optional capabilities and is intended to ensure interoperability of DoIP implementations.

Key topics and requirements

• IP-based transport support (TCP and UDP) for diagnostic services.
• Vehicle network integration and IP address assignment mechanisms.
• Vehicle announcement and discovery procedures to detect DoIP-capable vehicles on a network.
• Retrieval of basic vehicle status information (e.g., diagnostic power/mode).
• Connection establishment, concurrent connection handling, connection maintenance and vehicle gateway control.
• Routing of diagnostic data to and from vehicle sub-components (ECUs) via the gateway.
• Error handling for network faults (e.g., disconnects) and recovery procedures.
• Optional features: DoIP entity status monitoring, Transport Layer Security (TLS) for secure sessions, and DoIP firewall capabilities.
• Requirements for client test equipment (DoIP entities) to detect, negotiate and interact with vehicle gateways.

Typical use and users

Used by vehicle manufacturers (OEMs), Tier‑1 suppliers, diagnostic tool vendors, test-equipment manufacturers, independent service tool developers, compliance and test laboratories, and automotive cybersecurity teams. Typical applications include vehicle service diagnostics, manufacturing test systems, remote diagnostics, and validation of DoIP-enabled ECUs and gateways.

Related standards

ISO 13400 is a multi-part series. Closely related documents include ISO 13400-1 (General information and use-case definitions), ISO 13400-3 (Wired vehicle interface based on IEEE 802.3) and ISO 13400-4 (Ethernet-based high-speed data link connector). Related diagnostic and protocol standards include ISO 14229 (UDS diagnostic services), ISO 27145 (WWH-OBD series) and standards covering OBD connectors and emissions diagnostics.

Keywords

DoIP, diagnostic communication, vehicle gateway, transport protocol, network layer, TCP, UDP, TLS, vehicle discovery, IP address assignment, ECU routing, automotive diagnostics, ISO 13400.

FAQ

Q: What is this standard?

A: ISO 13400-2:2019 is the second part of the ISO 13400 series that specifies transport and network-layer services for diagnostic communication over Internet Protocol (DoIP) between external test equipment and in-vehicle servers/gateways.

Q: What does it cover?

A: It covers TCP/UDP transport, IP addressing and network integration, vehicle announcement and discovery, basic vehicle status retrieval, connection establishment and maintenance, routing to vehicle sub-components, error handling, and optional features such as TLS and DoIP firewalling.

Q: Who typically uses it?

A: Automotive OEMs, Tier‑1 suppliers, diagnostic tool and test-equipment manufacturers, independent service tool developers, test labs and automotive cybersecurity teams.

Q: Is it current or superseded?

A: ISO 13400-2:2019 has been withdrawn and replaced by ISO 13400-2:2025 (Edition 3, published June 2025). An amendment to the 2019 edition (Amd 1:2023) was issued prior to the 2025 replacement.

Q: Is it part of a series?

A: Yes. ISO 13400 is a multi-part series addressing DoIP; Part 1 covers general information and use cases, Part 2 covers transport and network services, Part 3 covers the wired vehicle interface (IEEE 802.3) and Part 4 covers the high-speed data link connector, among related documents.

Q: What are the key keywords?

A: DoIP, diagnostic communication, TCP, UDP, IP addressing, vehicle discovery, vehicle gateway, TLS, ECU routing, automotive diagnostics.