P200912 - TroubleshootingP200912-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
P200912	The three-phase line of ITS motor and water pump is short-circuited to the power supplyITS电机水泵三相线短路到电源	1. The three-phase line of the motor and water pump is short-circuited to the power supply.1.电机水泵三相线短路到电源

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 motor water pump wiring harness for damage, breakage, loose connection, etc.检查电机水泵线束是否存在损坏、断裂、虚接等现象。 3. Check the motor water pump wiring harness connector for loose connection or damage.检查电机水泵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 motor water pump wiring harness or connector.维修或更换电机水泵线束或接插件。

②Check the three-phase circuit of the motor and water pump检查电机水泵三相线路

1. Check whether the three-phase circuit of the motor and water pump is short-circuited to the power supply.检查电机水泵三相线路是否短路到电源。 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 three-phase wiring harness of the motor and water pump.维修或更换电机水泵三相线束。

③Replace motor water pump更换电机水泵

1. Replace the motor and water pump and check whether the fault code and symptoms are eliminated.更换电机水泵，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。