B1ED44B - TroubleshootingB1ED44B-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
B1ED44B	Millimeter wave radar system has a fault and the temperature is too high毫米波雷达系统存在故障，温度过高	1.Radar overheating failure1.雷达过热故障

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Check for unusual heat sources around the vehicle.检查车辆周围是否存在异常热源。 2. Check whether the ambient temperature of the vehicle is too high.检查车辆所处环境温度是否过高。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 2.去步骤2。 No否 Move the vehicle away from the current environment.将车辆驶离当前环境。

②Cooling check冷却检查

1. Turn off the power to the entire vehicle and let the vehicle sit for a while to cool down.关闭整车电源，将车辆静置冷却一段时间。 2. Power on again, let the forward radar work for a period of time, and check whether the fault code and symptoms are eliminated.重新上电，使前向雷达工作一段时间，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。

③Power on check上电检查

1. The vehicle is powered on and off again.车辆再次上下电。 2. Power status "ON".电源状态“ON”。 3. Use a diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.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 4.去步骤4。

④Replace 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。