B111200 - TroubleshootingB111200-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
B111200	RLS calibration errorRLS校准错误	1. There is a problem with the source node1.源节点出问题
		2. Whether the LIN line is short-circuited or short-circuited to power or ground.2.LIN线路是否发生短接或短路电源、地的故障情况
		3. Is there strong electromagnetic interference around the ECU that affects LIN communication?3.ECU周边是否存在影响LIN通信的强电磁干扰
		4. It may be that the BCM itself is faulty4.可能是BCM本身故障

Troubleshooting steps故障诊断步骤

①Power 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 2.去步骤2。

②Calibrate the rain light sensor校准雨量光线传感器

Power status "OFF".电源状态“OFF”。

Connect the diagnostic tool.连接诊断仪。

Start the vehicle and follow the diagnostic tool prompts to calibrate the rain light sensor.启动车辆，按照诊断仪提示校准雨量光线传感器。

After the calibration is completed, check whether the fault code and symptoms have been eliminated.校准完成后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。

③Replace the rain light sensor更换雨量光线传感器

Replace the rain light sensor with a new one and check whether the fault code and symptoms are eliminated.更换新的雨量光线传感器，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.从其它症状查找原因。