P188D4B - TroubleshootingP188D4B-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
P188D4B	IGBT module over temperature faultIGBT模块过温故障	1. The cooling water pump does not work or the water flow is insufficient1.冷却水泵不工作或水流量不足
		2. The cooling water temperature is too high (the fan does not work)2.冷却水温过高（风扇不工作）

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Connect the diagnostic tool, record and clear the fault code.连接诊断仪，记录并清除故障码。 2. Let the vehicle sit for a while to cool down.车辆静置冷却后一段时间。 3. Restart the vehicle, conduct a road test for a period of time, and read the fault code again.重新启动车辆，路试一段时间，再次读取故障码。 Check whether the fault code exists?检查故障码是否存在？ Yes是 Go to step 2.去步骤2。 No否 Fault resolved.故障排除。

②Check cooling system检查冷却系统

1. Check whether the cooling system is normal.检查冷却系统是否正常。 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 Check the cooling system.检修冷却系统。

③Replacing 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。