P202201 - TroubleshootingP202201-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
P202201	Electronic expansion valve power supply short circuit电子膨胀阀供电电源短路	1.EXV power supply is short-circuited to ground1.EXV供电电源短路到地

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 whether the electronic expansion valve wiring harness is damaged or broken.检查电子膨胀阀线束是否存在损坏、断裂等现象。 3. Check the electronic expansion valve wiring harness connector for loose connection or damage.检查电子膨胀阀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 the electronic expansion valve wiring harness or connector.维修或更换电子膨胀阀线束或接插件。

②Check the power supply circuit of the electronic expansion valve检查电子膨胀阀供电电源线路

1. Check whether the power supply line of the electronic expansion valve is short-circuited to ground.检查电子膨胀阀供电电源线路是否短路到地。 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 electronic expansion valve power supply wiring harness.维修或更换电子膨胀阀供电电源线束。

③Replace the refrigerant valve island assembly更换冷媒阀岛总成

1. Replace the refrigerant valve island assembly and check whether the fault code and symptoms are eliminated.更换冷媒阀岛总成，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。