Troubleshooting › Driving and parking assistance systems › Diagnosis
U11E288-故障诊断 · T00612065

 U11E288 - TroubleshootingU11E288-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
U11E288
There is a fault in the CANFD communication between MCU and FLR, and the node is offlineMCU与FLR CANFD通信存在故障，节点离线
1. Detect ADC controller failure1.检测ADC控制器故障
2. Detect wiring harness faults2.检测线束故障
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 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 3.去步骤3。
No否 Drive away from the current situation.驶离当前所处环境。
③Check 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 4.去步骤4。
No否 Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。
④Check CANFD3 communication waveform检查CANFD3通讯波形
1. Power status "OFF".电源状态“OFF”。
2. Connect the oscilloscope.连接示波器。
3. Power status "ON".电源状态“ON”。
4. Use an oscilloscope to measure the waveforms of CANFD3_H and CANFD3_L.用示波器测量CANFD3_H和CANFD3_L的波形。
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 Check the CANFD3 communication harness; if normal, go to step 5.检查CANFD3通讯线束；若正常，去步骤5。
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。