U181281 - TroubleshootingU181281-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
U181281	There is a fault in communication with the ADC and invalid serial port data is received.与ADC通信存在故障，接收到无效串口数据	1. The communication data with the intelligent driving domain controller MCU is invalid.1.与智能驾驶域控制器MCU通信数据无效

Troubleshooting steps故障诊断步骤

①Check wiring harness and connectors检查线束及接插件

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 CANFD3 communication harness is damaged or broken.检查CANFD3通讯线束是否存在损坏、断裂等现象。 3. Check the CANFD3 communication harness connector for loose connection or damage.检查CANFD3通讯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。

②Power 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 3.去步骤3。

③Check your surroundings检查周围环境

1. Check the surrounding environment for sources of magnetic fields.检查周围环境是否存在磁场源。 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 Drive away from the current situation.驶离当前所处环境。

④Check the automatic driving domain controller fault code检查自动驾驶域控制器故障码

1. Use a diagnostic tool to read the fault code of the autonomous driving domain controller and check whether there is a fault on the autonomous driving domain controller.使用诊断仪读取自动驾驶域控制器故障码，检查自动驾驶域控制器是否存在故障。 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 Troubleshoot the autonomous driving domain controller based on the fault code.根据故障码排除自动驾驶域控制器故障。

⑤Replace the left front blind spot monitoring main sensor更换左前盲区监测主传感器

1. Replace with a new left front blind spot monitoring main sensor and check whether the fault code and symptoms are eliminated.更换新的左前盲区监测主传感器，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 main sensor for monitoring the left front blind spot, you need to use a diagnostic instrument to recalibrate the main sensor for monitoring the left front blind spot.更换左前盲区监测主传感器后，需用诊断仪对左前盲区监测主传感器重新标定。