Troubleshooting › Seat › Diagnosis
U018487-故障诊断 · T00671093

 U018487 - TroubleshootingU018487-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
U018487
ACU node lost on CAN busCAN总线上的ACU节点丢失
1. The communication harness is disconnected or the module is lost1.通讯线束断开或模块丢失
Troubleshooting steps故障诊断步骤
①General inspection一般检查
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 BCAN communication harness is damaged or broken.检查BCAN通讯线束是否存在损坏、断裂等现象。
3. Check the BCAN communication harness connector for loose connections or damage.检查BCAN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 the presence of magnetic fields.检查周围环境是否存在磁场。
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 vehicle infotainment head unit fault code检查车载智能多媒体主机故障码
1. Use the diagnostic tool to read the fault code of the infotainment head unit and check whether there is a fault code in the infotainment head unit.使用诊断仪读取车载智能多媒体主机故障码，检查车载智能多媒体主机是否存在故障码。
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 according to the fault code.根据故障码排除故障。
⑤Replace seat ventilation and heating module更换座椅通风加热模块
1. Replace the seat ventilation and heating module with a new one, and check whether the fault code and symptoms are eliminated.更换新的座椅通风加热模块，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：
♦  When replacing the seat ventilation and heating module, you need to use a diagnostic tool to recalibrate the seat ventilation and heating module.更换座椅通风加热模块，需用诊断仪对座椅通风加热模块重新标定。