Troubleshooting › Driving and parking assistance systems › Diagnosis
B373017-故障诊断 · T00617281

 B373017 - TroubleshootingB373017-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
B373017
There is a fault in the IMR power supply and the circuit voltage is higher than the thresholdIMR电源存在故障，电路电压高于门槛值
1. The power supply voltage is too high1.电源电压过高
Troubleshooting steps故障诊断步骤
①Power on check上电检查
1. Repower the vehicle, use the diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.车辆重新上电，使用诊断仪读取并清除故障码，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 Go to step 2.去步骤2。
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 3.去步骤3。
No否 Discharge the 12V battery and replace it if necessary.对蓄电池进行放电，必要时更换蓄电池。
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 Go to step 4.去步骤4。
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。