本SAE信息报告的目的是详细说明在重新编程菲亚特-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）时使用的串行数据通信接口（SCI）所需的要求。它旨在满足美国联邦环境保护局（EPA）和加利福尼亚州空气资源委员会（CARB）监管机构就所有符合车载诊断（OBD）排放相关动力传动装置的“直通编程”提出的新法规。这些要求对于为独立的汽车服务机构和售后故障诊断仪供应商提供为所有汽车制造商重新编程与排放相关的动力总成ECU的能力是必要的。具体而言，本文件详细说明了在诊断测试仪和ECU之间建立通信所需的SCI物理层和SCI数据链路层要求。 它进一步规定了在SCI通信链路上应用多路闪光选通电压以进行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。它只定义了在诊断测试仪和ECU之间传输数据的通用方法，而不考虑应用程序消息传递结构。本文件从测试人员的角度定义了SCI通信链路。本规范将作为技术信息报告在SAE J2534-1直通编程中引用。在这方面，SCI通信链路的加入是对SAE J2534-1中先前规定的认可OBD通信链路的补充，并构成菲亚特克莱斯勒汽车（FCA）制造商特有的要求。

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.