Automatic headlight function not available自动大灯功能不可用

①Check the wiring harness connector检查线束接插件
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check whether the rain light sensor wiring harness is damaged or broken.检查雨量光线传感器线束是否存在损坏、断裂等现象。 3. Check whether there is a loose connection or damage to the rain light sensor harness connector.检查雨量光线传感器线束接插件是否存在虚接、损坏等现象。 Are the test results normal?检查结果是否正常？ Yes → Go to step 2.是>>去步骤2。 No → Repair or replace the faulty wiring harness or connector.否>>维修或更换故障线束或接插件。
②Check the vehicle infotainment head unit fault code检查车载智能多媒体主机故障码
1. Use the diagnostic tool to read the fault code of the infotainment head unit and check whether there is a fault in the infotainment head unit.使用诊断仪读取车载智能多媒体主机故障码，检查车载智能多媒体主机是否存在故障。 Are the test results normal?检查结果是否正常？ Yes → Go to step 3.是>>去步骤3。 No → Troubleshoot the fault of the vehicle-mounted intelligent multimedia host according to the fault code.否>>根据故障码排除车载智能多媒体主机故障。
③Check the touch control screen检查触摸控制屏
1. Check whether the touch control screen is working properly.检查触摸控制屏是否工作正常。 Are the test results normal?检查结果是否正常？ Yes → Go to step 4.是>>去步骤4。 No → Replace the touch control screen.否>>更换触摸控制屏。
④Check integrated body control module fault codes检查集成式车身控制模块故障码
1. Use the diagnostic tool to read the fault code of the integrated body control module and check whether there is a fault in the integrated body control module.使用诊断仪读取集成式车身控制模块故障码，检查集成式车身控制模块是否存在故障。 Are the test results normal?检查结果是否正常？ Yes → Go to step 5.是>>去步骤5。 No → Troubleshoot the integrated body control module fault according to the fault code.否>>根据故障码排除集成式车身控制模块故障。
⑤Check fuse检查保险丝
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check whether the fuse IF34 in the electrical box on the instrument panel is normal.检查仪表板电器盒中保险丝IF34是否正常。 IF34：10A Are the test results normal?检查结果是否正常？ Yes → Go to step 6.是>>去步骤6。 No → Replace the fuse with the same specification.否>>更换相同规格保险丝。
⑥Check the rain light sensor power supply检查雨量光线传感器电源
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the rain light sensor harness connector BD41.断开雨量光线传感器线束接插件BD41。 3. Connect the negative terminal of the 12V battery.连接蓄电池负极。 4. Use a digital multimeter to measure the voltage between pin 3 of the BD41 and ground.用数字万用表测量BD41的3号针脚与接地之间的电压。 Standard voltage value: about 12.5V标准电压值：约12.5V Are the test results normal?检查结果是否正常？ Yes → Go to step 7.是>>去步骤7。 No → Repair or replace the rain light sensor power harness.否>>维修或更换雨量光线传感器电源线束。
⑦Check the rain light sensor ground harness检查雨量光线传感器接地线束
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the rain light sensor harness connector BD41.断开雨量光线传感器线束接插件BD41。 3. Use a digital multimeter to measure the resistance between pin 2 of the BD41 and ground.用数字万用表测量BD41的2号针脚与接地之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω Are the test results normal?检查结果是否正常？ Yes → Go to step 8.是>>去步骤8。 No → Repair or replace the rain light sensor grounding harness.否>>维修或更换雨量光线传感器接地线束。
⑧Check the rain light sensor LIN communication harness检查雨量光线传感器LIN通讯线束
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the rain light sensor harness connector BD41 and the integrated body control module harness connector BD56.断开雨量光线传感器线束接插件BD41与集成式车身控制模块线束接插件BD56。 3. Use a digital multimeter to measure the resistance between pin 1 of BD41 and pin 29 of BD56.用数字万用表测量BD41的1号针脚与BD56的29号针脚之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω Are the test results normal?检查结果是否正常？ Yes → Go to step 9.是>>去步骤9。 No → Repair or replace the rain light sensor LIN communication harness.否>>维修或更换雨量光线传感器LIN通讯线束。
⑨Replace the rain light sensor更换雨量光线传感器
1. Replace the rain light sensor and check whether the fault is eliminated.更换雨量光线传感器，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Find the cause from other fault symptoms.否>>从其他故障现象查找原因。