OBDII通讯协议.docx
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1、OBD-II通讯合同OBD-IINetworkStandards)J1850PW- AdoptedbyGM;aIsoknownasC1ass2.- AdoptedbyChrysIer(knownasJ1850).- SomereferencestoPWmodeheardaboutinregardstoToyota(andHonda?).- 10.4kbpszsingIeWire.J1850PWM- AdoptedbyFord;a1soknownasStandardCorporateProtocoI(SCP).- A1soseeninsomeMazdaproducts.- Somereferec
2、estoPWMmodeheardboutinregardstoMtsubishi.- 41.6kbpsztwowireba1ancedsiga1.ISO9141andISO9141-2(aIsokowasISO9141CARB)- SeeninsomeChrys1erandMazdaproducts.- SeemstobemorecommoninEurope.- 10.4kbps,singIewire.OBDII通讯合同obdiigenericcommunictionprotocoIsbymaufacturerRecet1yItriedtoista11myproductonPeuzeot(40
3、6orsomethigsimi1ar).TherewasKWPbus.ItriedtogetthespeedaIuefromthebusbysendingthefoi1owigstringOxc2Ox33Oxf10x01OxOd0xf4.OnresponceIreceiedtwoaswersfrom2differentECUs:1)Ox830xf1Ox100x7f0x01Ox120x161)0x83Oxf10x40x410x0d0x000x66ThefirstECUsentmeNACK(Thisresposecodeindicatesthattherequestedactionwi11notb
4、etakebecausetheserer(ECU)doesnotsupporttheargumetsoftherequestmessageortheformatoftheargumetbytesdootmatehtheprescribedformatforthespecifiedserice.)Myquestionis:iftherewssomethingwrogwiththeargumetsoftherequestmessage,thesecodECUa1soshou1dnotuderstandtherequest,bititdid!Andthesecondquestiois:whythef
5、irstECUdidsendthenegatieanswer.IfyouIookatthej1979PDFyouwiIIfindtherethatIfanECUdoesnotsupportayofthePIDsrequesteditisnota11owedtosendanegatieresponsemessage.OBD信息:我理解的OBD-II原则诊断插座列表Pin2Pin7C1ICqqJV17Pin10Pin15我理解的obd-ii原则诊断插座列表端子号称端子接线4搭铁16蓄电池正极,9-127,15资料数据传播线(iso9141-2)5信号反馈线搭铁2SaejI850数据输送线10se制
6、造厂数据输送线举一实例;捷达前卫诊断座t16中;就有1647三个端子按以上规定接线。EOBD欧洲原则新的eropeaobd诊断坐连接原则d1c-j!962pin1saej2411zgmsing1eWireCQn;通用公司单线can-bspi2iso11519-4(bus+)(saej1850),和10号脚同步使用,41.6kbpsPWm脉宽调制单线用法:只用2号脚1根线通讯10.4kbpsPW可变脉宽调制byteheader+crcznochecksumor,inter-byteseparation(inframeresponsebyte?)pin3chrys1er,ccd+(notobd);
7、克莱斯勒Ccd-bus网线h线pin4底盘地chssisgroundpi5逻辑地signaIgroundpin6iso15765-4;can-bus高速诊断线(h线)z250500kbit/sPin7kwp1281或kwp合同诊断线(k线),波特率10400/多数厂家默认kpw诊断线pi8点火开关打开有电ig+;点火开关。n/off状态辨认用途pi97号脚不以便用时,启用*kwp1281或kwp合同诊断线(k线),波特率10400pin10iso11519-4(bus-)(saej1850),和2号脚同步使用,41.6kbpsPWm脉宽调制pi11chrySIerzccd-(notobd);克
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