B380016 - TroubleshootingB380016-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
B380016	There is a fault in the ADC power circuit and the circuit voltage is lower than the threshold valueADC电源电路存在故障，电路电压低于门槛值	1. Abnormal voltage of power supply system1.供电系统电压异常

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 autonomous driving domain controller wiring harness is damaged or broken.检查自动驾驶域控制器线束是否存在损坏、断裂等现象。 3. Check whether there are loose connections or damage to the autonomous driving domain controller harness connector.检查自动驾驶域控制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.对蓄电池进行充电。 No否 Inspect DCDC and its lines.检修DCDC及其线路。

④Check the power supply voltage of the autonomous driving domain controller检查自动驾驶域控制器供电电压

1. Check whether the power supply voltage of the autonomous driving domain controller is normal.检查自动驾驶域控制器供电电压是否正常。 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 the power supply line of the autonomous driving domain controller.检修自动驾驶域控制器供电线路。

⑤Replacing the autonomous driving domain controller更换自动驾驶域控制器

1. Replace with a new autonomous driving domain controller and check whether the fault code and symptoms are eliminated.更换新的自动驾驶域控制器，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 autonomous driving domain controller, you need to use a diagnostic tool to recalibrate the autonomous driving domain controller.更换自动驾驶域控制器后，需用诊断仪对自动驾驶域控制器重新标定。