B1E139C - TroubleshootingB1E139C-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
B1E139C	The forward-facing camera is faulty and the sensor is blind前向摄像头存在故障，传感器失明	1.IFC is blocked by rain, snow, mud and other obstructions1.IFC被雨雪、泥土等遮挡物遮挡

Troubleshooting steps故障诊断步骤

①Clear occlusion factors清除遮挡因素

Clear the blocking factors and check whether the fault codes and symptoms are eliminated.清除遮挡因素，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。

②Replace lane departure warning ECU更换车道偏离预警ECU

Replace with a new lane departure warning ECU and check whether the fault code and symptoms are eliminated.更换新的车道偏离预警ECU，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：

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After replacing the lane departure warning ECU, you need to use a diagnostic tool to recalibrate the lane departure warning ECU.更换车道偏离预警ECU后，需用诊断仪对车道偏离预警ECU重新标定。