B1C7F19 - TroubleshootingB1C7F19-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
B1C7F19	Front blower output overcurrent前鼓风机输出过流	1. The wiring harness is short-circuited to the power supply1.线束对电源短路

Troubleshooting steps故障诊断步骤

①General inspection一般检查
1. Check the blower wire harness for damage, breakage, etc.检查鼓风机线束是否存在损坏、断裂等现象。 2. Check the blower harness connector for loose connection or damage.检查鼓风机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 faulty wiring harness or connector.维修或更换故障线束或接插件。
②Power 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 3.去步骤3。
③Check blower supply voltage检查鼓风机供电电压
	1. The vehicle is powered on.车辆上电。 2. Turn on the air conditioner.打开空调。 3. Use a digital multimeter to measure the voltage between pins 1 and 2 of the AC11 blower harness connector.用数字万用表测量鼓风机线束接插件AC11的1号针脚与2号针脚之间的电压。 Standard voltage value: about 12V标准电压值：约12V 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 the blower power supply wiring harness.维修或更换鼓风机供电线束。
④Replace speed control module更换调速模块
1. Replace the speed control module with a new one and check whether the fault code and symptoms are eliminated.更换新的调速模块，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 Go to step 5.去步骤5。
⑤Replace 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 6.去步骤6。
⑥Replacing 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。