B1C3914 - TroubleshootingB1C3914-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
B1C3914	Compressor outlet temperature sensor short circuit压缩机出口温度传感器短路	1. The sensor module harness is open circuit or short circuited to ground.1.传感器模块线束开路或者对地短路

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 compressor outlet refrigerant temperature sensor wiring harness for damage, breakage, etc.检查压缩机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 compressor outlet refrigerant temperature sensor harness connector for loose connection or damage.检查压缩机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 compressor outlet refrigerant temperature sensor circuit检查压缩机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 compressor outlet refrigerant temperature sensor harness connector FB63 and the thermal management integrated module harness connector FB44.断开压缩机出口冷媒温度传感器线束接插件FB63和热管理集成模块线束接插件FB44。 3. Use a digital multimeter to measure the resistance between pin 4/40 of FB44 and ground.用数字万用表测量FB44的4/40号针脚与接地之间的电阻。 Standard resistance value: >1M标准电阻值：＞1M Ω
	d. Connect the negative terminal of the 12V battery, and the power status is "ON".d.连接蓄电池负极，电源状态“ON”。 e. Use a digital multimeter to measure the voltage between pin 4/40 of FB44 and ground.e.用数字万用表测量FB44的4/40号针脚与接地之间的电压。 Standard voltage value: about 0V标准电压值：约0V 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 compressor outlet refrigerant temperature sensor wiring harness.维修或更换压缩机出口冷媒温度传感器线束。
③Replace the compressor outlet refrigerant temperature sensor更换压缩机出口冷媒温度传感器
1. Replace the compressor outlet refrigerant temperature sensor with a new one and check whether the fault code and symptoms are eliminated.更换新的压缩机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。