SAE J 2610-2015 Serial Data Communication Interface.pdf

1、 SURFACE VEHICLE INFORMATION REPORT J2610 JAN2015 Issued 2002-04 Revised 2015-01 Superseding J2610 APR2002 Serial Data Communication Interface RATIONALE The purpose of the SAE J2610 specification revision is to address the changes below: A. Timing Delay parameters for communication modes have been u

2、pdated. Figure 11 has been updated to reflect the clarifications. B. Flash Strobe Voltage description has been clarified. Figure 14 has been updated to reflect the clarifications. C. HSM2 reference has been removed since it is not a requirement for SCI Powertrain reprogramming. D. Company profile re

3、ference has been changed from DaimlerChrysler to Fiat Chrysler Automobiles (FCA). E. Changed the document reference from the ECU to the Tester. FOREWORD The purpose of this document is to specify the requirements necessary to fully define the Serial Communication Interface (SCI) communication link u

4、sed in the reprogramming of emission-related powertrain Electronic Control Units (ECU) in Fiat Chrysler Automobiles (FCA) vehicles. It is intended to satisfy regulations proposed by the federal U.S. Environmental Protection Agency (EPA) and California Air Resource Board (CARB) regulatory agencies re

5、garding “pass-thru programming” of all On-Board Diagnostic (OBD) compliant emission-related powertrain devices. These requirements are intended to provide independent automotive service organizations and after-market scan tool suppliers the ability to reprogram emission-related powertrain ECUs for a

6、ll manufacturers of automotive vehicles. This specification shall strictly apply to Fiat Chrysler Automobiles (FCA) vehicles developed and manufactured exclusively by the former Chrysler Corporation and DaimlerChrysler Corporation (Chrysler Group), and for purposes of clarification, referred to here

7、in as Fiat Chrysler Automobiles (FCA). This specification shall not apply to other former DaimlerChrysler Corporation vehicles or subsidiaries, including products developed and manufactured by Mercedes-Benz, Smart, or Mitsubishi Motors Corporation. The SCI communication link defined herein shall app

8、ly to vehicles with Chrysler DLC configurations A or B. These requirements are in addition to the approved OBD communication links previously specified and included in SAE J2534-1 Pass-Thru Programming, and constitute unique Fiat Chrysler Automobiles (FCA) manufacturer-specific requirements. This sp

9、ecification will be referenced from within SAE J2534-1 as a technical information report. _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicabili

10、ty and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comment

11、s and suggestions. Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE

12、. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/s

13、tandards/J2610_201501 SAE INTERNATIONAL J2610 Revised JAN2015 Page 2 of 21 TABLE OF CONTENTS 1. SCOPE . 3 1.1 Purpose 3 1.2 Applications 3 1.3 History. 3 2. REFERENCES . 4 2.1 Applicable Documents 4 2.2 Related Publications . 4 3. DEFINITIONS . 5 4. ABBREVIATIONS AND ACRONYMS 6 5. TECHNICAL OVERVIEW

14、 . 6 5.1 General . 6 5.2 Communication Model 7 6. PHYSICAL LAYER . 7 6.1 Data Rate Specification 7 6.2 Signal Definition 8 6.3 Routing and Connectivity . 9 6.4 Media Characteristics . 12 6.5 ECU Receiver/Transmitter Reference Circuits . 12 7. DATA LINK LAYER 15 7.1 Data Frame Definition. 15 7.2 Inte

15、r-Frame Timing . 15 7.3 Error Handling 18 8. MESSAGE APPLICATION LAYER 18 8.1 Message Frame Structure 19 9. REPROGRAMMING REQUIREMENTS 19 9.1 Security . 19 9.2 Block Transfer 19 9.3 Hardware Interlock . 20 9.4 Flash Strobe . 20 Figure 1 SCI cOMMUNICATION MODEL DEPICTING THE THREE CONCEPTUAL LAYERS 7

16、 Figure 2 SCI Communication modes with available data rates and bit times 8 Figure 3 Terminal assignments and function for SAE J1962 diagnostic connector configurations . 10 Figure 4 Configuration A depicted with single SCI line shared per pair of emission ECUS . 11 Figure 5 Configuration B depicted

17、 with independent SCI lines per each emission ECU 11 Figure 6 Representative ECU receiver circuit with typical component values . 13 Figure 6.1 Electrical characteristics . 13 Figure 6.2 Recommended interface circuit on tester . 14 Figure 6.3 Transmitter electrical requirements 14 Figure 7 Represent

18、ative ecu transmitter circuit with typical component values . 14 Figure 8 This example depicts the data frame transmission of character $69 . 15 Figure 9 Two-frame message request/acknowledgement sequence with a two-frame message response during a diagnostic session 16 Figure 10 Multiple-frame messa

19、ge download sequence with a multiple-frame acknowledgement during a reprogramming session 17 Figure 11 Timing delay parameters listed as a function of communication mode . 17 Figure 12 Arbitrary message frame structure for support of multiple protocols . 19 Figure 13 Vpp flash strobe electrical para

20、meter values . 20 Figure 14 Tester multiplexing of the SCI TX and vpp flash strobe signals for a single data block transfer event . 21 SAE INTERNATIONAL J2610 Revised JAN2015 Page 3 of 21 1. SCOPE 1.1 Purpose The purpose of this SAE Information Report is to specify the requirements necessary to full

21、y define the Serial Data Communication Interface (SCI) used in the reprogramming of emission-related powertrain Electronic Control Units (ECU) in Fiat Chrysler Automobiles (FCA) vehicles. It is intended to satisfy new regulations proposed by the federal U.S. Environmental Protection Agency (EPA) and

22、 California Air Resource Board (CARB) regulatory agencies regarding “pass-thru programming” of all On-Board Diagnostic (OBD) compliant emission-related powertrain devices. These requirements are necessary to provide independent automotive service organizations and after-market scan tool suppliers th

23、e ability to reprogram emission-related powertrain ECUs for all manufacturers of automotive vehicles. Specifically, this document details the SCI physical layer and SCI data link layer requirements necessary to establish communications between a diagnostic tester and an ECU. It further specifies add

24、itional requirements for the application of a flash strobe voltage multiplexed on the SCI communication link for purposes of ECU reprogramming. This document does not specify the content or meaning of the application messages or diagnostic protocol to be transmitted on the SCI communication link. It

25、 only defines a generic method to transfer data between a diagnostic tester and an ECU, regardless of application messaging structure. This document has been written defining the SCI communication link from the Testers point of view. This specification will be referenced from within SAE J2534-1 Pass

26、-Thru Programming as a technical information report. In this regard, the inclusion of the SCI communication link is in addition to the approved OBD communication links previously specified in SAE J2534-1, and constitutes unique Fiat Chrysler Automobiles (FCA) manufacturer-specific requirements. 1.2

27、Applications This document shall strictly apply to Fiat Chrysler Automobiles (FCA) vehicles developed and manufactured exclusively by the former Chrysler Corporation and DaimlerChrysler Corporation (Chrysler Group), and for purposes of clarification, referred to herein as Fiat Chrysler Automobiles (

28、FCA) . This document shall not apply to other former DaimlerChrysler Corporation vehicles or subsidiaries, including products developed and manufactured by Mercedes-Benz, Smart, or Mitsubishi Motors Corporation. The SCI communication link defined herein shall apply to OBD vehicles retroactive to the

29、 1994 model year. 1.3 History Fiat Chrysler Automobiles (FCA) introduced flash technology into emission-related powertrain ECUs beginning in the 1993 model year. Flash technology consisted of implementing reprogrammable memory devices into powertrain ECUs for purposes of updating software functional

30、ity and calibrations in the customer field (service environment), assembly plant (manufacturing environment), and vehicle development (engineering environment). Reprogramming events in the field require strict compliance to corporate guidelines based on the following criteria: - Vehicle performance

31、/ driveability - Vehicle safety - Vehicle emissions - Vehicle fuel economy - Customer satisfaction The Fiat Chrysler Automobiles (FCA) flash strategy consists of incorporating proprietary standards and requirements into the flash process. These requirements involve the integration of multiple levels

32、 of protective security measures using software and hardware lockout techniques including additional safeguard mechanisms controlled via internal corporate processes and corporate test tools. New regulations will force a change in the current Fiat Chrysler Automobiles (FCA) flash strategy and proces

33、s. SAE INTERNATIONAL J2610 Revised JAN2015 Page 4 of 21 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available f

34、rom SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1850 Class B Data Communications Network Interface SAE J1962 Diagnostic Connector SAE J1979 E/E Diagnostic Test Modes SAE J2190 Enhance

35、d E/E Diagnostic Test Modes SAE J2534-1 Recommended Practice for Pass-Thru Vehicle Programming 2.1.2 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 9141-2 Road Vehicles - Diagnostic Systems - P

36、art 2: CARB Requirements for Interchange of Digital Information ISO 14230-4 Road vehicles - Keyword Protocol 2000 for Diagnostic Systems - Part 4: Requirements for Emission-Related Systems ISO 15765-4 Road Vehicles - Diagnostics on CAN - Part 4: Requirements for Emission-Related Systems 2.2 Related

37、Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 Fiat Chrysler Automobiles (FCA) Publications Available from Fiat Chrysler Automobiles (FCA), Vehicle Diagnostics, CIMS 484-08-06, 800 Chrysler Drive, Aub

38、urn Hills, MI USA 48326-2757. SCI Diagnostic Protocol for PCM Applications, Fiat Chrysler Automobiles (FCA) SAE J2190 Diagnostic Protocol for PCM Applications, Fiat Chrysler Automobiles (FCA) System and Method for Reprogramming Vehicle Computers, U.S. Patent No. 5,278,759, Fiat Chrysler Automobiles

39、(FCA) SAE INTERNATIONAL J2610 Revised JAN2015 Page 5 of 21 2.2.2 Motorola, Inc. Publication Available from Motorola Literature Distribution, P.O. Box 20912, Phoenix, AZ USA 85036. Queued Serial Module (QSM) Reference Manual, Motorola, Inc. 3. DEFINITIONS 3.1 BIT The contraction of binary digit repre

40、senting the smallest unit of information. A bit can assume either a logical high (e.g., mark) or logical low (e.g., space) value. 3.2 BIT TIME The time required to serially transmit/receive one bit of data, which is equal to one cycle of the baud frequency. 3.3 BREAK A character or symbol used to te

41、rminate bus communications and reset all nodes to a ready-to-receive state. 3.4 CHARACTER A data byte contained in a data frame transmission. 3.5 FRAME One complete transmission of information delineated by the start of frame (start bit) and end of frame (stop bit) identifiers. 3.6 MESSAGE An orderl

42、y sequence of data frame transmissions having varying length. 3.7 FULL-DUPLEX A communication system capable of simultaneous bi-directional communications. 3.8 HALF-DUPLEX A communication system capable of bi-directional communications, but only in one direction at a time. 3.9 MARK A state of a bina

43、ry element indicating a logical high or “1” value (inverse of space). 3.10 SPACE A state of a binary element indicating a logical low or “0” value (inverse of mark). 3.11 START BIT The first binary element transmitted in the asynchronous transmission of a data frame. It is used to uniquely identify

44、the beginning of a data frame transmission to synchronize the receiver to an active session. 3.12 STOP BIT The last binary element transmitted in the asynchronous transmission of a data frame. It is used to uniquely identify the end of a data frame transmission to return the receiver to an idle cond

45、ition. SAE INTERNATIONAL J2610 Revised JAN2015 Page 6 of 21 4. ABBREVIATIONS AND ACRONYMS a. bps bits per second b. BRK Break c. CAN Controller Area Network d. CARB California Air Resource Board e. ECM Engine Control Module f. ECU Electronic Control Unit g. EPA Environmental Protection Agency h. ISO

46、 International Standards Organization i. LSB Least Significant Bit j. MSB Most Significant Bit k. NRZ Non-Return-to-Zero l. OBD On-Board Diagnostic m. PCM Powertrain Control Module n. PROM Programmable Read Only Memory o. RAM Random Access Memory p. ROM Read Only Memory q. Rx Receive r. SAE Society

47、of Automotive Engineers s. SCI Serial Communication Interface t. TCM Transmission Control Module u. TTL Transistor-Transistor Logic v. Tx Transmit w. UART Universal Asynchronous Receiver Transmitter 5. TECHNICAL OVERVIEW 5.1 General The Serial Data Communication Interface (SCI) is defined as a full-

48、duplex, asynchronous, UART-based serial interface for point-to-point communications between an off-board diagnostic tester and an on-board electronic control unit (ECU). The SCI communication link is required to support the diagnosis and reprogramming of emission-related powertrain devices for Fiat

49、Chrysler Automobiles (FCA) vehicles. It is implemented as a non-inverted 0 to 5 V DC asynchronous system requiring a 5 V DC idle high mode. SCI baud rates are software selectable for data transmission modes. SCI terminations at the diagnostic connector must be software selectable for multiplexing old and new SCI con