P186C4B - TroubleshootingP186C4B-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
P186C4B	IGBT junction temperature over-temperature deratingIGBT结温过温降额	1. Abnormal traffic1.流量异常
		2. The radiator works abnormally2.散热器工作异常

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。