UDS诊断服务PPT

1、UDS诊断服务,什么是UDS？,UDS - Unified diagnostic services (统一诊断服务) 俗称14229. 形象的说：就是使用一套仪器，对当前汽车出现的问题进行分析。而这套仪器与汽车交谈所使用的语言就是UDS（不是唯一的方法）。,2,基本时间参数,3,寻址方式,4,根据物理地址的不同进行访问-只能访问单个ECU节点,根据功能的不同进行访问-能访问多个ECU节点,物理寻址,功能寻址,诊断服务,5,否定响应（1）,6,否定响应（2）,7,DiagnosticSessionControl,8,服务请求格式,DiagnosticSessionControl,9,正响应格式,

2、负响应格式,ECUReset,10,服务请求格式,ECUReset,11,正响应格式,负响应格式,ClearDiagnosticInformation,12,服务请求格式,ClearDiagnosticInformation,13,正响应格式,负响应格式,ReadDTCInformation,14,服务请求格式,Report Number of DTC by Status Mask,ReadDTCInformation,15,正响应格式,负响应格式,Report Number of DTC by Status Mask,ReadDTCInformation,16,服务请求格式,Report D

3、TC by Status Mask,ReadDTCInformation,17,正响应格式,Report DTC by Status Mask,ReadDTCInformation,18,负响应格式,Report DTC by Status Mask,ReadDTCInformation,19,服务请求格式,Report DTC Snapshot Identification,ReadDTCInformation,20,正响应格式,Report DTC Snapshot Identification,ReadDTCInformation,21,负响应格式,Report DTC Snapshot

4、 Identification,ReadDTCInformation,22,服务请求格式,Report DTC Extended Data Record by DTC Number,ReadDTCInformation,23,正响应格式,Report DTC Snapshot Identification,ReadDTCInformation,24,负响应格式,Report DTC Snapshot Identification,ReadDTCInformation,25,服务请求格式,Report Supported DTC,ReadDTCInformation,26,正响应格式,Repor

5、t Supported DTC,ReadDTCInformation,27,负响应格式,Report Supported DTC,Read Data by Identifier,28,服务请求格式,Read Data by Identifier,29,正响应格式,负响应格式,Security Access,30,服务请求格式,Step 1: Request seed,Security Access,31,正响应格式,负响应格式,Step 1: Request seed,Security Access,32,服务请求格式,Step 2: Seed security key,Security Ac

6、cess,33,正响应格式,负响应格式,Step 2: Seed security key,Communication Control,34,服务请求格式,Communication Control,35,正响应格式,负响应格式,Write Data by Identifier,36,服务请求格式,Write Data by Identifier,37,正响应格式,负响应格式,Routine Control,38,服务请求格式,Routine Control,39,正响应格式,Routine Control,40,负响应格式,Tester Present,41,服务请求格式,Tester Pr