Car surveillance radar not working车内监控雷达不工作

①Check the wiring harness connector检查线束接插件
1. Check whether the in-car monitoring radar wiring harness is damaged or broken.检查车内监控雷达线束是否存在损坏、断裂等现象。 2. Check whether there are loose connections or damage to the in-vehicle monitoring radar wiring harness connector.检查车内监控雷达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 CAN communication system检查CAN通讯系统
1. Check whether the CAN communication system is normal.检查CAN通讯系统是否正常。 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 CAN communication system.否>>排除CAN通讯系统故障。
③Check 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 IF41 in the electrical box on the instrument panel is normal.检查仪表板电器盒中保险丝IF41是否正常。 IF41：7.5A 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 fuse with the same specification.否>>更换相同规格保险丝。
④Check the power line of the in-car monitoring radar检查车内监控雷达电源线路
	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 in-vehicle monitoring radar harness connector BD108.断开车内监控雷达线束接插件BD108。 3. Connect the negative terminal of the 12V battery and the power status is "ON".连接蓄电池负极，电源状态“ON”。 4. Use a digital multimeter to measure the voltage between pin 1 of the BD108 and ground.用数字万用表测量BD108的1号针脚与接地之间的电压。 Standard voltage value: about 14V标准电压值：约14V Are the test results normal?检查结果是否正常？ Yes → Go to step 5.是>>去步骤5。 No → Repair or replace the in-vehicle monitoring radar power wiring harness.否>>维修或更换车内监控雷达电源线束。
⑤Check the grounding circuit of the in-car monitoring radar检查车内监控雷达接地线路
	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 in-vehicle monitoring radar harness connector BD108.断开车内监控雷达线束接插件BD108。 3. Use a digital multimeter to measure the resistance between pin 6 of the BD108 and ground.用数字万用表测量BD108的6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 6.是>>去步骤6。 No → Repair or replace the in-vehicle monitoring radar grounding harness.否>>维修或更换车内监控雷达接地线束。
⑥Replacement of in-car surveillance radar更换车内监控雷达
1. Replace the in-car monitoring radar and check whether the fault is eliminated.更换车内监控雷达，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。   Caution:注意： ♦  After replacing the in-vehicle monitoring radar, you need to use a diagnostic tool to calibrate the in-vehicle monitoring radar.更换车内监控雷达后，需使用诊断仪对车内监控雷达进行标定。