B1C7F4B - TroubleshootingB1C7F4B-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
B1C7F4B	Front blower overtemperature前鼓风机过温	1. The ambient temperature around the blower is too high1.鼓风机周围环境温度过高

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 blower work for a period of time, and check whether the fault code and symptoms are eliminated.重新上电，使鼓风机工作一段时间，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。

③Replace blower更换鼓风机

1. Replace the blower with a new one and check whether the fault code and symptoms are eliminated.更换新的鼓风机，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。

④Replacing the thermal management integrated module更换热管理集成模块

1. Replace the thermal management integrated module with a new one and check whether the fault code and symptoms are eliminated.更换新的热管理集成模块，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 thermal management integrated module, you need to use a diagnostic instrument to recalibrate the thermal management integrated module.更换热管理集成模块后，需用诊断仪对热管理集成模块重新标定。