B1E9F91 - TroubleshootingB1E9F91-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
B1E9F91	There is a fault in the vehicle configuration of the forward camera, and the parameters are out of range.前向摄像头车型配置存在故障，参数超范围	1. Variable code writing error1.变量代码写入错误

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 variable code检查变量代码

1. Check whether the code written to the variable is correct.检查写入变量代码是否正确。 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 Rewrite the variable code.重新写入变量代码。

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。