1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 14230-1:2012Road vehicles Diagnosticcommunication over K-Line(DoK-Line)Part 1: Physical layerBS ISO 14230-1:2012 BRITISH STANDARDNational forewordThis British Standard is
2、the UK implementation of ISO 14230-1:2012.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to incl
3、ude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69678 7ICS 43.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British
4、Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2012.Amendments issued since publicationDate Text affectedBS ISO 14230-1:2012 ISO 2012Road vehicles Diagnostic communication over K-Line (DoK-Line)Part 1: Physical layerVhicules routiers Communication
5、 de diagnostic sur la ligne K (DoK-Line)Partie 1: Couche physiqueINTERNATIONAL STANDARDISO 14230-1Second edition 2012-06-01Reference number ISO 14230-1:2012(E)BS ISO 14230-1:2012ISO 14230-1:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwi
6、se specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright of
7、ficeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14230-1:2012ISO 14230-1:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Terms, defin
8、itions, symbols and abbreviated terms 13.1 Terms and definitions . 13.2 Abbreviated terms . 14 Conventions 25 Document overview 26 Vehicle to external test equipment connection . 36.1 K- and L-line configurations . 36.2 Configuration requirements . 37 Signal and communication specifications . 47.1 S
9、ignal 47.2 Communication specification 58 Requirements of external test equipment 58.1 Minimum functional requirements 58.2 Electrical specifications 69 Requirements of ECU . 79.1 Minimum functional requirements 79.2 Input and output lines 79.3 Electrical specifications 79.4 Minimum functional capab
10、ilities . 810 Wiring requirements . 8Bibliography . 9BS ISO 14230-1:2012ISO 14230-1:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried ou
11、t through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO co
12、llaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International St
13、andards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements o
14、f this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 14230-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment.This second edition cancels and replac
15、es the first edition (ISO 14230-1:1999), which has been technically revised.ISO 14230 consists of the following parts, under the general title Road vehicles Diagnostic communication over K-Line (DoK-Line): Part 1: Physical layer Part 2: Data link layer Part 3: Application layer Part 4: Requirements
16、for emission-related systemsiv ISO 2012 All rights reservedBS ISO 14230-1:2012ISO 14230-1:2012(E)IntroductionISO 14230 has been established in order to define common requirements for vehicle diagnostic systems implemented on K-Line (UART based) communication link, as specified in this part of ISO 14
17、230.To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model in accordance with ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. When mapped on this model, the services specified by ISO 14230 are broken down into the foll
18、owing.a) Diagnostic services (layer 7), specified in ISO 14229-6, ISO 14229-1;b) Presentation layer (layer 6): vehicle manufacturer specific, legislated OBD: specified in ISO 15031-2, ISO 15031-5, ISO 15031-6, SAE J1930-DA, SAE J1979-DA, SAE J2012-DA, legislated WWH-OBD: specified in ISO 27145-2, SA
19、E J1930-DA, SAE J1979-DA, SAE J2012-DA, SAE J1939 Appendix C (SPNs), SAE J1939-73 Appendix A (FMIs);c) Session layer services (layer 5): legislated OBD: specified in ISO 14229-2, legislated WWH-OBD: specified in ISO 14229-2;d) Transport layer services (layer 4), specified in ISO 14230-2;e) Network l
20、ayer services (layer 3), specified in ISO 14230-2;f) Data link layer (layer 2), specified in ISO 14230-4, ISO 14230-2;g) Physical layer (layer 1), specified in ISO 15765-4, ISO 14230-1.This breakdown is shown in Table 1.Table 1 Enhanced and legislated OBD diagnostic specifications applicable to the
21、OSI layersApplicability OSI 7 layerVehicle manufacturer enhanced diagnosticsLegislated OBD (On-Board Diagnostics)Legislated WWH-OBD (On-Board Diagnostics)Seven layers according to ISO 7498-1 and ISO/IEC 10731Application (layer 7)ISO 14229-1, ISO 14229-6ISO 15031-5ISO 14229-1, ISO 27145-3Presentation
22、 (layer 6)vehicle manufacturer specificISO 15031-2, ISO 15031-5, ISO 15031-6, SAE J1930-DA, SAE J1979-DA, SAE J2012-DAISO 27145-2, SAE 1930-DA, SAE J1979-DA, SAE J2012-DA, SAE J1939:2011 Appendix C (SPNs), SAE J1939-73:2010 Appendix A (FMIs)Session (layer 5)ISO 14229-2Transport (layer 4)ISO 14230-2
23、ISO 15765-2ISO 15765-4ISO 15765-4, ISO 15765-2ISO 27145-4Network (layer 3)Data link (layer 2)ISO 14230-2ISO 11898-1, ISO 11898-2ISO 15765-4, ISO 11898-1, ISO 11898-2Physical (layer 1)ISO 14230-1 ISO 2012 All rights reserved vBS ISO 14230-1:2012ISO 14230-1:2012(E)The application layer services covere
24、d by ISO 14229-6 have been defined in compliance with diagnostic services established in ISO 14229-1 and ISO 15031-5, but are not limited to use only with them. ISO 14229-6 is also compatible with most diagnostic services defined in national standards or vehicle manufacturers specifications.vi ISO 2
25、012 All rights reservedBS ISO 14230-1:2012INTERNATIONAL STANDARD ISO 14230-1:2012(E)Road vehicles Diagnostic communication over K-Line (DoK-Line) Part 1: Physical layer1 ScopeThis part of ISO 14230 specifies the physical layer, based on ISO 9141, on which the diagnostic services will be implemented.
26、 It is based on the physical layer described in ISO 9141-2, but expanded to allow for road vehicles with either 12 V d.c. or 24 V d.c. voltage supply.NOTE In this part of ISO 14230, values given in parentheses apply to 24 V d.c. systems.2 Normative referencesThe following referenced documents are in
27、dispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7637-1, Road vehicles Electrical disturbances from conduction and coupling Part 1: Defi
28、nitions and general considerationsISO 7637-2, Road vehicles Electrical disturbances from conduction and coupling Part 2: Electrical transient conduction along supply lines onlyISO 14230-2, Road vehicles Diagnostic communication over K-Line (DoK-Line) Part 2: Data link layerISO 15031-2, Road vehicles
29、 Communication between vehicle and external equipment for emissions-related diagnostics Part 2: Guidance on terms, definitions, abbreviations and acronyms3 Terms, definitions, symbols and abbreviated terms3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in
30、ISO 15031-2 and the following apply.3.1.1rise timetime taken for the voltage to change from 20 VB/100 to 80 VB/100, where VBis the vehicle battery voltage3.1.2fall timetime taken for the voltage to change from 80 VB/100 to 20 VB/100, where VBis the vehicle battery voltage3.2 Abbreviated termsCTEcapa
31、citance contribution of external test equipment and associated cablesCOBWcapacitance contribution of on-board wiring ISO 2012 All rights reserved 1BS ISO 14230-1:2012ISO 14230-1:2012(E)CECUcapacitance contribution of electronic control unitECU electronic control unitEMI electromagnetic interferenceN
32、RZ non-return to zeroVBvehicle battery voltage4 ConventionsThis part of ISO 14230 is based on the conventions discussed in the OSI Service Conventions (ISO/IEC 10731:1994) as they apply for communication services.5 Document overviewFigure 1 illustrates the most applicable application implementations
33、 utilizing the DoK-Line protocol.ISO 14229-1 UDS Specification and requirementsOSI Layer 7ApplicationOSI Layer 6PresentationOSI Layer 5SessionOSI Layer 4TransportOSI Layer 3NetworkOSI Layer 1PhysicalOSI Layer 2Data LinkISO 14229-2 UDS Session layer servicesISO 14229-6 UDSonK-Line1 : 1ISO 14229-2 UDS
34、 Session layer servicessubsetISO 14230-2 DoK-line Data link layerStandardized Service Primitive InterfaceISO 14230-4 DoK-Line Requirements for emissions-related systemsvehicle manufacturer specificEnhancedDiagnosticsISO 15031-2, -5, -6 Emissions-related OBD data definitionISO 15031-5 Emissions-relat
35、ed OBD servicesEmissions -related OBDISO 14230-1 DoK-linePhysical layerDiagnostic communication over K-Line protocol (DoK-Line )Figure 1 Diagnostic communication over K-Line document reference according to OSI model2 ISO 2012 All rights reservedBS ISO 14230-1:2012ISO 14230-1:2012(E)6 Vehicle to exte
36、rnal test equipment connection6.1 K- and L-line configurationsVehicle ECUs which support the protocol described in ISO 14230 shall support either a one-wire (K line only) or a two-wire (K and L) communication connection for diagnosis, test or maintenance. Vehicle battery voltage, VB, power ground an
37、d signal ground shall be provided by the ECU(s) or the vehicle to the tester.Line K is a bidirectional line. It is used during initialization to convey address information or, in the case of fast initialization, the wake-up pattern from the external test equipment to vehicle ECUs, simultaneously wit
38、h the L line. After conveying this information, the K line is used for all other diagnostic communications between tester and vehicle ECUs, in both directions. This includes the completion of the initialization sequence and all other communication services as described in ISO 14230-2.Line L is a uni
39、directional line and is only used during initialization to convey address information or, in the case of fast initialization, the wake-up pattern from the external test equipment to vehicle ECUs, simultaneously with the K line. At all other times, it should idle in the logic “1” state.Figure 2 shows
40、 the system configurations allowed, indicating the role of each of the lines K and L.LKECU 2ECU 1123External test equipmentKey1 unidirectional data flow from external test equipment to ECU 22 bidirectional data flow between external test equipment and ECUs 1 and 23 vehicle diagnostic connectorFigure
41、 2 Possible system configurations6.2 Configuration requirementsIf any ECU, either of one type or in combination, are linked on a bus, the system designer shall ensure that the configuration is capable of correct operation. For example, data from one ECU shall not initialize the serial communication
42、of another ECU on the bus and an initialization signal shall not cause more than one ECU to respond simultaneously; it may, however, initialize a number of ECUs on the bus which then respond in an orderly sequential manner.If lines K and L are used for purposes other than inspection, test and diagno
43、sis, care shall be taken to avoid data collision and incorrect operation in all modes. ISO 2012 All rights reserved 3BS ISO 14230-1:2012ISO 14230-1:2012(E)7 Signal and communication specifications7.1 SignalNOTE On those vehicles fitted with ISO 15031-3 connectors, all measurements should be referenc
44、ed to the signal ground and battery supply pins of that connector. On other vehicles without ground and supply pins, the battery posts should be used as reference.For proper operation of the serial communication, both ECU and external test equipment shall correctly determine each logic state as foll
45、ows: a logic “0” is equivalent to a voltage level on the line of less than 20VB/100 for transmitter, and 30VB/100 for receiver; a logic “1” is equivalent to a voltage level on the line of greater than 80VB/100 for transmitter, and 70VB/100 for receiver.In addition, the slope times shall be less than
46、 10 % (15 %) of the bit time.Voltage levels between 30VB/100 and 70VB/100 may be detected as either logic “0” or logic “1”.NRZ coding shall be used. The bit time is defined as half the time between the 50VB/100 levels of successive rising or falling edges of alternating “1” and “0” bits.Figure 3 ill
47、ustrates the worst case on signal levels. For electrical specifications of the external test equipment, see 8.2; for ECUs, see 9.3.GroundTransmitter ReceiverVB100 %80 %20 %0 %30 %70 %100 %0 %Logic 0 receivedLogic 1 receivedLogic 1 sentLogic 0 sentFigure 3 Signal voltage levels, worst-case values4 IS
48、O 2012 All rights reservedBS ISO 14230-1:2012ISO 14230-1:2012(E)7.2 Communication specification7.2.1 Communication schematicsThe configuration is shown schematically in Figure 4.R1 or 0CTEIExternal test equipmentVehicleVBLine K or LGroundCOBWCECU1 or 0ECUReadingRReadingFigure 4 Communication schemat
49、ics7.2.2 Capacitance contributionThe capacitance contribution of the external test equipment and associated cables are termed CTE. The capacitance contribution of the on-board wiring is termed COBW. The sum of the input capacitance of all the ECUs on the bus is defined thus:CCiinECUECU=1where n is the number of ECUs on the bus.Values for CECU, COBWand CTEshall be selected such that: for vehicles with 12 V nominal supply, CECU+ COBW 7,2 nF and CTE 2 nF for vehicles with 24 V nominal s
