ISO 14229-3:2012 Road vehicles — Unified diagnostic services (UDS) — Part 3: Unified diagnostic services on CAN implementation (UDSonCAN)
https://www.iso.org/standard/55284.html

<この項は書きかけです。順次追記します。>
This article is not completed. I will add some words in order.

2 Normative references

ISO 14229-1, Road vehicles — Unified diagnostic services (UDS) — Part 1: Specification and requirements
ISO 14229-2, Road vehicles — Unified diagnostic services (UDS) — Part 2: Session layer services
ISO 15765-1, Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 1: General information and use case definition
ISO 15765-2, Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 2: Transport protocol and network layer services
ISO 15765-4, Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems

3.2 Abbreviated terms

CF consecutive frame
DA destination address
DLC data length code
FF first frame
FC flow control
ID identifier
NA network address
SA source address
SF single frame
SM subnet mask
SOM start of message
STRT serviceToRespondTo
TA target address
UDS unified diagnostic services
USDT unacknowledged segmented data transfer
UUDT unacknowledged unsegmented data transfer

Bibliography

[1] ISO/IEC 7498-1, Information technology — Open Systems Interconnection — Basic Reference Model — The Basic Mode
[2] ISO/IEC 10731:1994, Information technology — Open Systems Interconnection — Basic Reference Model — Conventions for the definition of OSI services
[3] ISO 11898-1, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical signalling
[4] ISO 11898-2, Road vehicles — Controller area network (CAN) — Part 2: High-speed medium access unit
[5] ISO 11898-3, Road vehicles — Controller area network (CAN) — Part 3: Low-speed, fault-tolerant, medium dependent interface
[6] ISO 11898-5, Road vehicles — Controller area network (CAN) — Part 5: High-speed medium access unit with low-power mode
[7] ISO 13400 (all parts), Road vehicles — Communication between test equipment and vehicles over Internet Protocol
[8] SAE J1930-DA, Digital Annex of Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and Acronyms Web Tool Spreadsheet
[9] SAE J1939, Companion Spreadsheet (CS1939)
[10] SAE J1939-73:2010, Recommended Practice for a Serial Control and Communication Vehicle Network — Application layer — Diagnostics
[11] SAE J1979-DA, Digital Annex of E/E Diagnostic Test Modes
[12] SAE J2012-DA, Digital Annex of Diagnostic Trouble Code Definitions and Failure Type Byte Definitions

6 Unified diagnostic services implementation on CAN

6.1 General

This clause defines how the diagnostic services as defined in ISO 14229-1 apply to DoCAN. For each
applicable service, the applicable sub-function and data parameters are defined.
NOTE The sub-function parameter definitions take into account that the most significant bit is used for the
suppressPosRspMsgIndicationBit parameter as defined in ISO 14229-1.

6.2 UDS on CAN services overview

The purpose of Table 2 is to reference all ISO 14229-1 and ISO 14229-2 services as they are applicable
for an implementation in ISO 14229-3, UDSonCAN. Table 2 contains the sum of all applicable services.
Certain applications using this part of ISO 14229 to implement UDSonCAN may restrict the number
of useable services and may categorize them in certain application areas/diagnostic sessions (default
session, programming session, etc.).
Services in Table 2 that are marked “No CAN specific requirements” shall be implemented as defined
in ISO 14229-1 and ISO 14229-2 with no additional restrictions. Services that are marked “CAN specific
requirements” shall be implemented as defined by the subclause listed in the Table 2 entry.
Table 2 — Overview of applicable ISO 14229-1, Unified diagnostic services and data ranges
Diagnostic service name Comment Reference in this
(ISO 14229-1) document
Diagnostic and Communication Management Functional Unit
DiagnosticSessionControl No CAN specific requirements —
ECUReset No CAN specific requirements —
SecurityAccess No CAN specific requirements —
CommunicationControl No CAN specific requirements —
TesterPresent No CAN specific requirements —
SecuredData-Transmission No CAN specific requirements —
ControlDTCSetting No CAN specific requirements —
ResponseOnEvent CAN specific requirements see 6.3
LinkControl No CAN specific requirements —
Data Transmission Functional Unit
ReadDataByIdentifier No CAN specific requirements —
ReadMemoryByAddress No CAN specific requirements —
ReadScalingDataByIdentifier No CAN specific requirements —
ReadDataByPeriodicIdentifier CAN specific requirements see 6.4
DynamicallyDefineDataIdentifier No CAN specific requirements —
WriteDataByIdentifier No CAN specific requirements —
WriteMemoryByAddress No CAN specific requirements —
ReadDTCInformation No CAN specific requirements —
ClearDiagnosticInformation No CAN specific requirements —
Data Transmission Functional Unit
ReadDTCInformation No CAN specific requirements —
ClearDiagnosticInformation No CAN specific requirements —
Input/Output Control Functional Unit
InputOutputControlByIdentifier No CAN specific requirements —
Remote Activation Of Routine Functional Unit
RoutineControl No CAN specific requirements —
Upload/Download Functional Unit
RequestDownload No CAN specific requirements —
RequestUpload No CAN specific requirements —
TransferData No CAN specific requirements —
RequestTransferExit No CAN specific requirements —
RequestFileTransfer No CAN specific requirements —

6.3 ResponseOnEvent (0x86) service DoCAN implementation requirements

In addition to the generic implementation requirements stated in ISO 14229-1 the following additional CAN specific implementation requirements shall apply.
While the ResponseOnEvent service is active, the server shall be able to process concurrent diagnostic request and response messages accordingly. This should be accomplished with a different serviceToRespondTo CAN Identifiers. If the same diagnostic request/response CAN Identifiers are used for
diagnostic communication and the serviceToRespondTo-responses, the following restrictions shall apply:
a) The server may ignore an incoming diagnostic request issued by the client that initiated the event, after an event has occurred and the serviceToRespondTo-response is in progress, until the serviceToRespondTo-response is completed. If another client issued the request, the server may or may not ignore the request, depending on the server’s capabilities.
b) When the client receives any response after sending a diagnostic request, the response shall be classified according to the possible serviceToRespondTo-responses and the expected diagnostic
responses to the previously sent request.

If the response is a serviceToRespondTo-response (one of the possible responses set up with ResponseOnEvent-service), the client shall repeat the request after the serviceToRespondTo-response has been received completely.
If the response is ambiguous (i.e. the response could originate from the serviceToRespondTo initiated by an event or from the response to a diagnostic request), the client shall present the response both as a serviceToRespondTo-response and as the response to the diagnostic request. The client shall not repeat the request with the exception of NegativeResponseCode busyRepeatRequest (0x21) (see the negative response code definitions in ISO 14229-1.
c) When the specified event is detected, the server shall respond immediately with the appropriate serviceToRespondTo-response message. The immediate serviceToRespondTo-response message shall not disrupt any other diagnostic request or response transmission already in progress (i.e. the
serviceToRespondTo-response shall be delayed until the current message transmission has been completed, see Figure 3).

参考資料

@kazuo_reve 自動車の故障診断に関連するプログラマーになりたての方が参照するとよさそうな情報
https://qiita.com/kazuo_reve/items/f773b320dcbf2ab316da

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https://qiita.com/kaizen_nagoya/items/3231d9fea536d1b9b1f7

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https://qiita.com/kaizen_nagoya/items/d3ff6aba9b7402e8bde8

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＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞
This article is an individual impression based on my individual experience. It has nothing to do with the organization or business to which I currently belong.

文書履歴(document history)

ver. 0.01 初稿 20220207

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