Troubleshooting › Keyless entry system › Diagnosis
U014087-故障诊断 · T00607434

 U014087 - TroubleshootingU014087-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
U014087
Communication with BCM lost与BCM通信丢失
1. Unable to receive BCM bus signal1.收不到BCM总线信号
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 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 3.去步骤3。
No否 Move the vehicle away from the current environment.将车辆驶离当前环境。
③Check the communication harness between the smart Bluetooth module and the integrated body control module检查智能蓝牙模块与集成式车身控制模块之间的通讯线束
Graphic
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. Disconnect the smart Bluetooth module harness connector BD43 and the integrated body control module harness connector BD56.断开智能蓝牙模块线束接插件BD43和集成式车身控制模块线束接插件BD56。
3. Use a multimeter to measure the resistance between pins 9/10 of BD43 and pins 41/42 of BD56.使用万用表测量BD43的9/10号针脚与BD56的41/42号针脚之间的电阻。
Standard resistance value <1标准电阻值＜1 Ω
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 the faulty wiring harness.维修或更换故障线束。
④Check body control system检查车身控制系统
1. Power status "OFF".电源状态“OFF”。
2. Connect the diagnostic tool.连接诊断仪。
3. Power status "ON".电源状态“ON”。
4. Use the diagnostic tool to check the body control system.使用诊断仪检查车身控制系统。
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 Repair body control system.维修车身控制系统。
⑤Replace the smart Bluetooth module更换智能蓝牙模块
1. Replace with a new smart Bluetooth module and check whether the fault code and symptoms are eliminated.更换新的智能蓝牙模块，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：
♦  After replacing the smart Bluetooth module, you need to use a diagnostic tool to recalibrate the smart Bluetooth module.更换智能蓝牙模块后，需用诊断仪对智能蓝牙模块重新标定。