P189909 - TroubleshootingP189909-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
P189909	Cooling abnormality fault Level 2冷却异常故障 Level 2	1. Coolant flow is too low1.冷却液流量过低

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Check whether the coolant level in the drive motor cooling system is normal.检查驱动电机冷却系统冷却液液位是否正常。 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 Go to step 2.去步骤2。

②Check the drive motor cooling system pipelines检查驱动电机冷却系统管路

1. Check the drive motor cooling system pipeline for damage, looseness, leakage, etc.检查驱动电机冷却系统管路是否存在破损、松动、泄漏等现象。 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 faulty parts and add coolant to appropriate locations.维修或更换故障部件并添加冷却液至合适的位置。

③Check the drive motor cooling system coolant检查驱动电机冷却系统冷却液

1. Check whether the coolant in the drive motor cooling system has deteriorated or contains many impurities.检查驱动电机冷却系统冷却液是否存在变质、杂质较多等现象。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 4.去步骤4。 No否 Replace coolant.更换冷却液。

④Check the drive motor cooling system fault code检查驱动电机冷却系统故障码

1. Use a diagnostic tool to read the drive motor cooling system fault code and check whether there is a fault in the drive motor cooling system.使用诊断仪读取驱动电机冷却系统故障码，检查驱动电机冷却系统是否存在故障。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 5.去步骤5。 No否 Troubleshoot the drive motor cooling system fault according to the fault code.根据故障码排除驱动电机冷却系统故障。

⑤Replacing the integrated electric drive assembly更换集成电力驱动总成

1. Replace the integrated electric drive assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的集成电力驱动总成，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 Look for causes from other symptoms.从其他症状查找原因。   Caution:注意： ♦  After replacing the integrated electric drive assembly, you need to use a diagnostic tool to recalibrate the integrated electric drive assembly.更换集成电力驱动总成后，需用诊断仪对集成电力驱动总成重新标定。