B1C3D15 - TroubleshootingB1C3D15-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
B1C3D15	Internal cooling outlet temperature sensor open circuit内冷出口温度传感器开路	1. The sensor module harness is open or short-circuited to the battery.1.传感器模块线束开路或者短路到电池

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 inner condenser outlet refrigerant temperature sensor wiring harness for damage, breakage, etc.检查内冷凝器出口冷媒温度传感器线束是否存在损坏、断裂等现象。 3. Check the inner condenser outlet refrigerant temperature sensor harness connector for loose connection or damage.检查内冷凝器出口冷媒温度传感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 faulty wiring harness or connector.维修或更换故障线束或接插件。
②Check the inner condenser outlet refrigerant temperature sensor circuit检查内冷凝器出口冷媒温度传感器线路
	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. Disconnect the inner condenser outlet refrigerant temperature sensor harness connector FB50 and the thermal management integrated module harness connector FB44.断开内冷凝器出口冷媒温度传感器线束接插件FB50和热管理集成模块线束接插件FB44。 3. Use a digital multimeter to measure the resistance between pins 1/2 of FB50 and pins 16/40 of FB44.用数字万用表测量FB50的1/2号针脚与FB44的16/40号针脚之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω 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 Repair or replace the inner condenser outlet refrigerant temperature sensor wiring harness.维修或更换内冷凝器出口冷媒温度传感器线束。
③Replace the inner condenser outlet refrigerant temperature sensor更换内冷凝器出口冷媒温度传感器
1. Replace the inner condenser outlet refrigerant temperature sensor with a new one and check whether the fault code and symptoms are eliminated.更换新的内冷凝器出口冷媒温度传感器，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。