U014687 - TroubleshootingU014687-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
U014687	Communication with gateway lost与网关通信丢失	1. The CAN line is open or short-circuited, and other ECUs send abnormally1.CAN线路开路或短接，其他ECU发送异常

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 damage, loose connection, etc.检查BCAN通讯线束接插件是否存在损坏、虚接等现象。 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 BCAN communication waveform检查BCAN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 BCAN_H and BCAN_L.使用示波器测量BCAN_H和BCAN_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 BCAN communication harness; if normal, go to step 4.检查BCAN通讯线束；若正常，去步骤4。

④Check other related systems on the BCAN communication bus检查BCAN通讯总线上其他相关系统

1. Check whether other related systems on the BCAN bus are normal.检查BCAN总线上其他相关系统是否正常。 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 Repair related systems.维修相关系统。

⑤Replace the mobile phone wireless charging module更换手机无线充电模块

1. Replace with a new mobile phone wireless charging module and check whether the fault code and symptoms are eliminated.更换新的手机无线充电模块，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 mobile phone wireless charging module, you need to use a diagnostic tool to recalibrate the mobile phone wireless charging module.更换手机无线充电模块后，需用诊断仪对手机无线充电模块重新标定。