后窗加热原理--涉及BCM控制逻辑反馈

1、上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.12022-7-8上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.22022-7-8车型 AP/ZP系列 涉及硬件（如继电器） BCM内部低边驱动控制外部继电器上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.32022-7-8涉及软件逻辑控制打开条件：1：发动机运行2：电池电压范围在11.316.7V之间3：按下后风窗加热的开关关闭条件1：发动机停止运行2：KL15 OFF3：电池电压过高或过

2、低4：再次按下后风窗加热开关5：后风窗已经连续工作15分钟，尚未关闭，则自动关闭。上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.42022-7-8硬件车型 :IP21 5501. BP12 750上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.52022-7-8软件逻辑控制The heated rear windscreen switch is directly hardwired to the HVAC ECU; on low specification vehicles this wi

3、ll be an electronic temperature control, ETC, unit located on LIN and on high specification vehicles this will be an automatic temperature control, ATC, unit located on MS CAN. The relevant HVAC ECU will request the HRW on via the following signal: HRWOnReq ATC ECU HRWOnReq_2 ETC ECU For BP12 projec

4、t ETC and ATC all located on MS CAN. The relevant HVAC ECU will request the HRW on via the signal: HRWOnReq - ATC and ETC.On receipt of a valid HRWOnReq or HRWOnReq_2 signal, the BC01 shall energise the HRW relay, turning the HRW on.On receipt of non-valid HRWOnReq & HRWOnReq_2 signals, the BC01

5、 shall de-energise the HRW relay, turning the HRW off.If, with the HRW relay energised, a further valid HRWOnReq or HRWOnReq_2 signal is not received within 30 seconds, then the BC01 shall de-energise the HRW relay.On initial power up / reset the relay shall be de-energised. 62022-7-8 上海汽车集团股份有限公司乘用

6、车公司 SAIC Motor Passenger Vehicle Co. HRW 运行条件为： 1：HRW开关触发 2：EngineRunning有效 3：点火有效 4：最长运行时间为有配置HrwMaxOpTimePrm设定 备注：1 当在发动状态或OverVoltageFlag为0HRW暂停输出 2 如果UnderVoltageFlag为0时，有HRW输出时则按照Off40S和On120S的周期运行。ZP11/IS12 控制逻辑上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.AP：ATC/ETC上海汽车集团股份有限公司乘用车公司 SAIC Motor Passenger Vehicle Co.BP：ATC/ETC上海汽车集团股份有限公司乘用车公司 SAIC Motor