B1E9291 - TroubleshootingB1E9291-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
B1E9291	Camera calibration is out of tolerance摄像头标定超差	1. Calibration failed1.标定失败
		2.IFC installation position is loose2.IFC安装位置松动

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 installation location检查安装位置

1. Check whether the lane departure warning ECU is installed correctly.检查车道偏离预警ECU安装是否正确。 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 Reinstall.重新安装。

③Recalibrate重新标定

1. Recalibrate the lane departure warning ECU and check whether the fault code and symptoms are eliminated.对车道偏离预警ECU重新标定，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 4.去步骤4。

④Replace lane departure warning ECU更换车道偏离预警ECU

1. 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： ♦  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。