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1、SILVER BUS B12M控制单元数据检测复合电路系统是以控制单元为中心的局域网电路系统。所以对B12M各控制单元的数据检测（也称控制单元数据流分析）是故障诊断和故障分析快速有效的方法之一。现将整理的相关资料发给各位结合电路图使用，由于水平有限难免有谬误之处，望及时指正。一 VECU针脚号码 类型 检查位电压 电阻 备注PA1HDI0V/24V2.642KPA2HDI0V/24V2.642KPA3HDI24.7/0V2.645KPA4HDI0V2.640KPA5HDI24.4V2.640KPA6HDI0V/22.1V2.638KPA7HDI0V/22.1V2.638KPA8HDI24.4V
2、/0V2.638KPA9HDI0V/24.3V2.641KPA10HDI0V/24.3V2.641KPA11HID0V/24.3V2.640KPA12AI接地0.1V0PA13电源24.3V12.27KPA14HDI0/24.5V2.639KPA15HDI2.641KPA16HDI2.643KPA172.640KPA18HDI2.639KPA19HDI2.644KPA20HDI0V/24V2.640KPA21HDI0V/24V2.641KPA22HDI2.639KPA23HDI0V/24V2.463KPA24HDI23.8V14.46KPA25HDI23.8V14.46KPA26HDI23.8
3、V14.46KPA27HDI23.8V14.46KPA28HDI23.3V132.2KPA29HDI2.642KPA30HDI0V/24V2.643K针脚号码 类型 检查位电压 电阻 备注PB1AO低23V1.909MPB2LDO0V1.968MPB3LDO0V2.103MPB4LDO0V2.156MPB5AO电源24.8V12.32KPB6PWM0V42.2KPB7HDI0V2.637KPB8AI0.6V/3.3V99.5KPB9AI0V99.5KPB10AO5.08V117.5KPB11LDI0V/24V14.47KPB12LDI24.2V14.48KPB13LDI24.2V14.48KP
4、B14HDI0V2.639KPB15AO低0.67V2.78MPB16AO低24.7V/0V2.119MPB17AO高0.4V/23.7V155.4KPB18LDO0V1.762MPB19AO24.7V12.32KPB20PWM6V38.23KPB21HDI0V2.642KPB22AO接地0V0.6PB23AO接地0V0.6PB24AI0.5V-4.5V99.5KPB25AI0V99.5KPB26AO5.06V117.8KPB27AI0.76V-2.5V107.7KPB28PWM9.62V12.97MPB29LDI24V14.48KPB30HDI0V2.641K针脚说明 类型 检查位电压 电阻
5、 备注PC1总线1V4.28KPC2总线4V8.94KPC3没用PC4总线2.5V5.22M/4.76MPC5总线2.5V5.22M/4.76M二CECM-C针脚说明 类型 检查位电压 电阻 备注JA1总线2.5V-4V4.3MJA2总线1V-2.5V4.3MJA3LDOUbat/0v37.5KJA4LDOUbat/0v37.4KJA5LDO12-20v/0v37.4KJA6LDO0v/UbatJA7LDOUbat/0-2vJA8接地0v0.5JA9电源Ubat10.3KJA10LDO0-2v/17-26vJA11HDO7.7v18.8KJA12HDO0/Ubat34.6KJA13HDOOv-
6、0.5Ubat34.6KJA14HDOUbat/0-2v34.7KJA15HDOUbat/0v34.6KJA16HDOUbat/0v34.1KJA17HDOUbat18.8KJA18HDO0.5v/Ubat33.9KJA19HDO0-20v2.6KJA20没用JA21没用JA22没用13.5KJA23没用JA24LDO/HDOUbat19KJA25LDO/HDOUbat19KJA26没用2.63KJA27总线2.7v4.3MJA28总线2.3v4.3MJA29地线0v0JA30电源Ubat10.33k针脚说明 类型 检查位电压电阻 备注JB1HDIUbat/1v5.5kBJ2HDI9-14V/
7、Ubat5.5kJB3HDI0v/Ubat2.6kJB4HTDI0v/Ubat2.63kJB5LTDI0.9Ubat114kJB6HDTIUbat/0v2.63kJB7没用JB8没用JB9HLDIUbat/0.5Ubat5.5kJB10HLDI0v/0.5Ubat5.5kJB11没用5.5kJB12没用JB13hdiUbat/0.5Ubat5.5kJB14HDI12V-Ubat5.5kJB15没用2.64KJB16LDI0.5Ubat/Ubat5.5kJB17LDI0V/0.5Ubat5.5kJB18没用JB19没用JB20没用JB21LDI0.5Ubat/0v5.5kJB22LDIUbat/
8、0v5.5kJB23HDI0V/Ubat5.5kJB24没用JB25HAI1.8V-2.8V61.3KJB26HAI1.8V-2.8V61.4JB27接地0V0.4KJB28HDO5V61.4KJB29HDO16V34.6KJB30没用针脚号码 类型 检查位电压 电阻 备注JC1总线1V4.28KJC2总线4V6.03KJC3JC4总线2.5V4.4MJC5总线2.5V4.4M三CM11针脚号码 类型 检查位电压 电阻1HAI0v176.5K2HDI12.5v177.1K3HAI0.95v177.1K4HAI4.9v177.4K5LDI12.5v6.32K6HDI25.1v6.33K7LDI1
9、2.5v6.33K8HDI12.5v6.28K9LDI12,5v6.33K10LDI12.5v6.34K11HDO0.13v14.1K12TDO7.8v14.1K13HDO5.1v14.1K14HDO7.8v14.05K15LDO7.76v14.09K16LDO7.76v14.20K17TDI2.21v6.33K18TDI2.23v6.35K19LDI12.5v6.33K20HDI25.1v6.33K21LDI12.9v6.35K22接地0v023接地0v024底盘ID标识24.5v8M-30M25没用24.5v8M-30M26没用24.5v8M-30M27没用24.5v8M-30M28没用24.5v8M-30M29底盘ID标识24.5v8M-30M30电源5v58.6K针脚类型 类型 检查位电压 电阻P11:1电源0V2P11:2电源25.6V14.4针脚电压 类型 检查位电压 电阻VOL11:1没用0VVOL11:2接地0V1.4VOL11:3电源Ubat15VOL11:4总线2.52vVOL11:5总线2.44v四CM12针脚号码 类型 检查位电压 电阻 备注1RES4.65V2RES4.65V3没用4没用5HDI12.4V6HDI12.6V7HDI12.6V8LDI12.6V9没用12.6V10HDI12.6V11HDO25V12HDO25V13HDO0V14
