B1ED691 - TroubleshootingB1ED691-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
B1ED691	There is a fault in the configuration of the millimeter wave radar model, and the parameters are out of range.毫米波雷达车型配置存在故障，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。

②Rewrite variable code重新写入变量代码

1. Rewrite the variable code and check whether the fault code and symptoms are eliminated.重新写入变量代码，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。

③Replace forward radar更换前向雷达

1. Replace with a new forward radar and check whether the fault code and symptoms are eliminated.更换新的前向雷达，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 forward radar, you need to use a diagnostic tool to recalibrate the forward radar.更换前向雷达后，需用诊断仪对前向雷达重新标定。