P200D12 - TroubleshootingP200D12-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
P200D12	Multi-way valve cold short circuit to power supply多通阀冷态短路到电源	1. Multi-port valve short circuit to power supply1.多通阀短路到电源

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 twelve-way water valve wiring harness for damage, breakage, loose connection, etc.检查十二通水阀线束是否存在损坏、断裂、虚接等现象。 3. Check the twelve-way water valve wiring harness connector for loose connections or damage.检查十二通水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 twelve-way water valve wiring harness or connector.维修或更换十二通水阀线束或接插件。

②Check the twelve-way water valve circuit检查十二通水阀线路

1. Check whether the twelve-way water valve circuit is shorted to the power supply.检查十二通水阀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 twelve-way water valve wiring harness.维修或更换十二通水阀线束。

③Replace the twelve-way water valve更换十二通水阀

1. Replace the twelve-way water valve and check whether the fault code and symptoms are eliminated.更换十二通水阀，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。