Kwp2KProtocol - Copia

8/13/2019 Kwp2KProtocol - Copia

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The Understandings

on KWP2K Protocoland Diagnostics

nexAuto Technologies


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Table of Contents

1. Vehicle Diagnostics

2. KWP2000 Overview3. KWP2000 Functionality

4. ECU Diagnostic Operation

5. Vehicle Network Topology

6. Communication Model

7. Application Layer

8. Network Layer

9. Data Link Layer

10. Physical Layer



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1. Vehicle Diagnostics

Definition of Message Command Format, Diagnostic Services,

Test Modes, and Data Parameter Identifiers between Off-board

Test Tools and On-board Control Modules in Vehicles

Protocols

KWP 2000 (Keyword Protocol 2000) / ISO 14230-3

- Defines diagnostic protocol functionality for ECUs

Legislative E/E Diagnostic Test Modes / SAE J1979

- Defines diagnostic protocol functionality to support legislative

diagnostics for emission-related powertrain control modules

only



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1. Vehicle Diagnostics (Cont.)

Interface

CAN Interface for KWP 2000 / ISO 11898-1

- Defines multiplexed serial data network for KWP 2000enhanced diagnostic services for CAN Class-C high-speed

applications and Class-B medium-speed applications

CAN Interface for OBD-II / ISO 15765-4

- Defines multiplexed serial data network for Legislative

Diagnostic Services for emission-related powertrain control

module applications



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2. KWP2000 Overview

Based on ISO 14229 and ISO 14230-3

for Vehicle-Diagnostic System KWP 2000 Standardized by DaimlerChrysler and Mitsubishi

Comply with ISO 14230-3 and ISO 15765-3

Diagnostic Communication Protocol for Service and Message

Basic and Enhanced Diagnostic Services for all ECUs



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3. KWP 2000 Functionality

Communication between a Diagnostic Tool and ECU

Diagnostic Session Management

Diagnostic Data Management

Fault Management with DTC (Diagnostic Trouble Code)

Implementation of Input/Output Device Control and

Management

Implementation of Upload/Download Control

Remote Activation of Routine



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4. ECU Diagnostic Operation

Report ECU Information

Report Vehicle Information Report I/O Device Information (e.g. Sensors, Switches, etc)

Control I/O Device Actuation (e.g. Solenoids, Relays, etc)

Report and Modify Parameter Information

Initiate Special Test Functions and On-board process

Detect, Clear, Store, and Report diagnostic Fault Information

Reprogram Flash Memory

Secure Access to Protected Information/Operations



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5. Vehicle Network Topology

GateWayCAN-B/C

Hybrid ECU

Diagnostic

Connector

ECU-C #1 ECU-C #2 ECU-C #3 ECU-C #n

Aux. ECU #1 Aux. ECU #2 Aux. ECU #n

ECU-B #1 ECU-B #2 ECU-B #3 ECU-B #n

Aux. ECU #1 Aux. ECU #2 Aux. ECU #n

CAN-C Bus

CAN-B Bus



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6. Communication Model

Test Tool Diagnostic Application

Off-Board Test Tool On-Board ECU

High-Level

ApplicationECU diagnostic Application

Virtual Link for Diagnostic ServicesApplication

Layer

Network

Layer

Data Link

Layer

Physical

Layer

Diagnostic Protocol Services

(Keyword Protocol 2000)

Diagnostic Protocol Services

(Keyword Protocol 2000)

Network Transport Protocol Services

(ISO 15765-2)

Network Transport Protocol Services

(ISO 15765-2)

Virtual Link for Message

Segmentation/Reconstruction

Controller Area Network (CAN)

(ISO 11898-1)


(ISO 11898-2/3)


(ISO 11898-1)


(ISO 11898-2/3)

Virtual Link for Data Frame

Virtual Link for Bit Stream

Physical Media



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7. Application Layer

Diagnostic Communication Protocol

Keyword Protocol 2000 (KWP 2000) Enhanced DiagnosticServices

- To support the ECU functional diagnostic and flash

reprogramming requirements Mandatory Set of KWP 2000 Diagnostic Services

- Services and corresponding diagnostic functions/parameters

per the diagnostic development level



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8. Network Layer

Network Transport Communication Protocol

Definition of Mechanism by Large Data Block Transferredbetween Off-board Test Tool and On-board Control Unit

To transform the Data Frames Received from the Data Link

Layer into Messages The Messages Mapping to Diagnostic Protocol Services by

the Application Layer

Large Block Message Segmented into Multiple Packets byTransmitting Node and Re-Assembled by Receiving Node



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9. Data Link Layer

Diagnostic Communication Interface

Definition of Data Frame Elements, Format, Length,Encapsulation, Inter-frame timing, and Error Detection

To Transform the Data Bits Received from the Physical Layer

into Data Frame The Data Frames Assembled into Messages by the Network

Layer

CAN Message Frame Structure CAN Physical and Functional Addressing



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10. Physical Layer

Definition of Data Transmission Rates, Data-encoding

Format, Electrical Signals, Physical Media Routing, andConnectivity

To Transform the Electrical Signals into Data Bits

The Data Bits Grouped into Data Frames by the Data LinkLayer


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