ISO 14230-4:2000

Name: ISO 14230-4:2000 — Road vehicles — Diagnostic systems — Keyword Protocol 2000 — Part 4: Requirements for emission-related systems
SKU: ISO 14230-4:2000
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Road vehicles — Diagnostic systems — Keyword Protocol 2000 — Part 4: Requirements for emission-related systems

Название (английский):

ISO 14230-4:2000

Road vehicles — Diagnostic systems — Keyword Protocol 2000 — Part 4: Requirements for emission-related systems

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 3
Дата публикации:: 8 июня 2000 г.
Издание:: ISO IS 14230 edition 1 version 1
ICS:: 43.180

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Описание (английский):

This part of ISO 14230 specifies the requirements for the Keyword Protocol 2000 (KWP 2000) data link and connected vehicle and scan tool when used to comply with on-board diagnostic (OBD) requirements for emission-related test data. This part of ISO 14230 only specifies requirements relative to the Keyword Protocol 2000 for OBD purposes. Complete specification can be found in ISO 14230 parts 1 to 3 and in ISO 14229. ISO 14230-1, ISO 14230-2 and ISO 14230-3 are applicable for OBD purposes only as explicitly referenced in this part of ISO 14230.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 14230-4:2000 specifies the requirements for the Keyword Protocol 2000 (KWP2000) data link and connected vehicle and scan tool when used to comply with on-board diagnostic (OBD) requirements for emission-related test data. This part focuses solely on the OBD-related constraints and behaviours of the KWP2000 protocol; complete protocol specifications are contained in ISO 14230 parts 1–3 and ISO 14229. The standard ensures consistent, interoperable communication between vehicles and diagnostic tools for emission testing.

Key benefits:

Ensures interoperability between vehicle ECUs and scan tools for emission diagnostics

Defines constrained message and timing behaviour for reliable emission test data

Helps manufacturers and tool developers maintain OBD compliance

Key Topics

Message structure: The header shall always consist of three bytes. An optional length byte shall not be used. Data length is limited to 7 bytes for compatibility with ISO 15031-5. Format bits A1A0 distinguish request (11) and response (10) messages and determine addressing mode.

Addressing: Functional address 33H is used as the target address for messages sent to the vehicle. Responses target the source address included in the request; response source addresses are the physical addresses of ECUs.

Timing: Only the normal timing parameter set with default values shall be used for both vehicle and scan tool. Timing exceptions described in ISO 14230-2 are not permitted.

Start/initialisation: ECUs shall support either 5 baud initialisation or fast initialisation; scan tools shall support both. Accepted keywords include 2025, 2027, 2029 and 2031, but only the functionality of keyword 2025 (3-byte header, no length byte, normal timing) shall be used. For 5 baud init, the 5 baud address is 33H and subsequent communication occurs at 10 400 baud.

Services and control: The vehicle shall support StopCommunication. The AccessTimingParameter service shall not be supported by the scan tool. The TesterPresent service must be supported by the vehicle to maintain an active session (with mandatory responses and use within P3).

Negative responses: Modules must reply with a positive or negative response when no transmission error occurred. Allowed negative response codes include 10, 11, 12, 21, 22, 78. Responses containing code 78 must be sent within P2 and followed by a final positive or different negative response.

Related Standards

ISO 14230-1:1999 (Physical layer)

ISO 14230-2:1999 (Data link layer)

ISO 14230-3:1999 (Application layer)

ISO 14229:1998 (Diagnostic services specification)

ISO 15031-5 (Emission-related diagnostic services)

ISO 9141-2:1994 (CARB interchange requirements)

This part of ISO 14230 provides the OBD-specific constraints and operational rules for KWP2000 to ensure consistent, reliable exchange of emission-related diagnostic data between vehicles and external diagnostic equipment.

ISO 14230-4:2000

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

ISO 14230-3:1999

Road vehicles — Diagnostic systems — Keyword Protocol 2000 — Part 3: Application layer

ISO 9141-2:1994

Road vehicles — Diagnostic systems — Part 2: CARB requirements for interchange of digital information

ISO 14230-1:2012

Road vehicles — Diagnostic communication over K-Line (DoK-Line) — Part 1: Physical layer

BS ISO 14229-2:2021

Road vehicles. Unified diagnostic services (UDS). Session layer services.

BS ISO 15031-5:2015

Road vehicles. Communication between vehicle and external equipment for emissions-related diagnostics. Emissi…

BS ISO 14230-2:2016

Road vehicles. Diagnostic communication over K-Line (DoKLine). Data link layer.