B373016 - TroubleshootingB373016-故障诊断

Fault code description故障码说明

DTC故障码(DTC)	Fault code description故障码描述	Possible cause of failure可能故障原因
B373016	There is a fault in the IMR power supply and the circuit voltage is below the thresholdIMR电源存在故障，电路电压低于门槛值	1. The power supply voltage is too low1.电源电压过低

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Power status 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 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。 3. 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是 Go to step 2.去步骤2。 No否 Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。

②Check 12V battery voltage检查蓄电池电压

1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。 2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。 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是 Go to step 4.去步骤4。 No否 Go to step 3.去步骤3。

③Check DCDC output voltage检查DCDC输出电压

1. The vehicle is powered on.车辆上电。 2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。 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是 Charge the 12V battery and replace it if necessary.对蓄电池进行充电，必要时更换蓄电池。 No否 Inspect DCDC and its lines.检修DCDC及其线路。

④Check the power supply voltage of the in-car monitoring radar检查车内监控雷达供电电压

1. Check whether the power supply voltage of the in-car monitoring radar is normal.检查车内监控雷达供电电压是否正常。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 5.去步骤5。 No否 Inspect and repair the power supply line of the monitoring radar in the vehicle.检修车内监控雷达供电线路。

⑤Replacement of in-car surveillance radar更换车内监控雷达

1. Replace with a new in-car monitoring radar and check whether the fault code and symptoms are eliminated.更换新的车内监控雷达，检查故障码及症状是否排除。 Are the test results normal?检查结果是否正常？ Yes是 Fault resolved.故障排除。 No否 Look for causes from other symptoms.从其他症状查找原因。   Caution:注意： ♦  After replacing the in-vehicle monitoring radar, you need to use a diagnostic tool to recalibrate the in-vehicle monitoring radar.更换车内监控雷达后，需用诊断仪对车内监控雷达重新标定。