B1C9011 - TroubleshootingB1C9011-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
B1C9011	ITS blower relay shorted to groundITS鼓风机继电器短路到地	1. Blower relay failure1.鼓风机继电器故障
		2. Blower wiring harness failure2.鼓风机线束故障

Troubleshooting steps故障诊断步骤

①General inspection一般检查
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check the blower relay wiring harness for damage, breakage, loose connection, etc.检查鼓风机继电器线束是否存在损坏、断裂、虚接等现象。 3. Check the blower relay harness connector for loose connection or damage.检查鼓风机继电器线束接插件是否存在虚接、损坏等现象。 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 Repair or replace blower relay harness or connector.维修或更换鼓风机继电器线束或接插件。
②Check blower relay检查鼓风机继电器
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Open the electrical box in the front compartment and check whether the blower relay ER05 is normal.打开前舱电器盒，检查鼓风机继电器ER05是否正常。 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 Replace the relay with the same specification.更换相同规格的继电器。
③Check blower relay circuit检查鼓风机继电器线路
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check the blower relay wiring for a short to ground.检查鼓风机继电器线路是否对地短路。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 4.去步骤4。 No否 Repair or replace blower relay wiring harness.维修或更换鼓风机继电器线束。
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。