U18B083 - TroubleshootingU18B083-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
U18B083	ITS_1/3 checksum failureITS_1/3 checksum故障	1. CAN line signal interference1.CAN线信号干扰
		2.ITS CAN communication abnormality2.ITS CAN通讯异常
		3.DCU CAN communication abnormality3.DCU CAN通讯异常

Troubleshooting steps故障诊断步骤

①General inspection一般检查

Check whether the ECAN communication harness is damaged or broken.检查ECAN通讯线束是否存在损坏、断裂等现象。

Check the ECAN communication harness connector for loose connections or damage.检查ECAN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 the ECAN communication harness or connector.维修或更换ECAN通讯线束或接插件。

②Power on check上电检查

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 for electromagnetic interference检查电磁干扰

Check for sources of magnetic fields around the vehicle.检查车辆周围是否存在磁场源。

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

Move the vehicle away from its current environment.使车辆驶离当前环境。

④Check the thermal management integrated module fault code检查热管理集成模块故障码

Use a diagnostic tool to read the thermal management integrated module fault code and check whether there is a fault in the thermal management integrated module.使用诊断仪读取热管理集成模块故障码，检查热管理集成模块是否存在故障。

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 thermal management integrated module according to the fault code.根据故障码排除热管理集成模块故障。

⑤Replacing the integrated electric drive assembly更换集成电力驱动总成

Replace the integrated electric drive assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的集成电力驱动总成，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 integrated electric drive assembly, you need to use a diagnostic tool to recalibrate the integrated electric drive assembly.更换集成电力驱动总成后，需用诊断仪对集成电力驱动总成重新标定。