P16E399 - TroubleshootingP16E399-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
P16E399	Battery temperature is too low alarm电池温度过低告警	1. The battery temperature exceeds the alarm value and the heating system does not work properly.1.电池温度超出报警值，加热系统未正常工作
		2. Exposed to low temperature environment for a long time2.长时间处于低温环境

Troubleshooting steps故障诊断步骤

①Check ambient temperature检查环境温度

1. Check whether the ambient temperature of the vehicle is too low.检查车辆所处环境温度是否过低。 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 Place the vehicle in a suitable working environment and wait for the battery to heat up to operating temperature; if the fault persists, go to step 2.将车辆置于合适的工作环境下，等待电池加热至工作温度；若故障依然存在，去步骤2。

②Check the thermal management integrated module fault code检查热管理集成模块故障码

1. Use a diagnostic tool to read the fault code of the thermal management integrated module and check whether there is a fault in the integrated temperature control system.使用诊断仪读取热管理集成模块故障码，检查集成温控系统是否存在故障。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 3.去步骤3。 No否 Repair the integrated temperature control system.检修集成温控系统。

③Replace the battery pack assembly更换电池组箱总成

1. Replace the battery pack assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的电池组箱总成，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 battery pack assembly, you need to use a diagnostic tool to recalibrate the battery pack assembly.更换电池组箱总成后，需用诊断仪对电池组箱总成重新标定。