串行数据通讯界面

[中文适用范围]： 本SAE信息报告的目的是规定完全定义用于菲亚特克莱斯勒汽车（FCA）车辆中与排放相关的动力总成电子控制单元（ECU）重新编程的串行数据通信接口（SCI）所需的要求。旨在满足美国联邦环境保护署（EPA）和加利福尼亚空气资源委员会（CARB）监管机构关于所有符合车载诊断（OBD）的与排放相关的动力总成设备的“直通编程”的新规定。这些要求是必要的，以提供独立的汽车服务组织和售后市场扫描工具供应商对所有汽车制造商与排放相关的动力总成ECU进行重新编程的能力。 具体而言，本文件详细说明了建立诊断测试仪与ECU之间通信所需的SCI物理层和SCI数据链路层要求。它进一步规定了在SCI通信链路上多路复用闪存选通电压以用于ECU重新编程的附加要求。本文件未规定在SCI通信链路上传输的应用消息或诊断协议的内容或含义。它仅定义了在诊断测试仪与ECU之间传输数据的通用方法，无论应用消息结构如何。本文件是从测试仪的角度定义SCI通信链路的。 本规范将在SAE J2534-1直通编程中作为技术信息报告引用。在这方面，SCI通信链路的加入是对先前在SAE J2534-1中规定的已批准的OBD通信链路的补充，并构成了独特的菲亚特克莱斯勒汽车（FCA）制造商特定要求。 本文件应严格适用于由前克莱斯勒公司和戴姆勒克莱斯勒公司（克莱斯勒集团）独家开发和制造的菲亚特克莱斯勒汽车（FCA）车辆，为澄清起见，本文称为菲亚特克莱斯勒汽车（FCA）。本文件不适用于其他前戴姆勒克莱斯勒公司车辆或子公司，包括梅赛德斯-奔驰、Smart或三菱汽车公司开发和制造的产品。本文定义的SCI通信链路应适用于追溯至1994年车型的OBD车辆。 [外文原描述]： The purpose of this SAE Information Report is to specify the requirements necessary to fully 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 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 the 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 additional 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 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 Tester's point of view.This specification will be referenced from within SAE J2534-1 Pass-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.Cross Reference: ISO 15765-4,ISO 9141-2,ISO14230-4,J1850_201510,J1962_201207,J1979_201202,J2190,J2534/1_201510