P18904B - TroubleshootingP18904B-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
P18904B	Control board overtemperature Level1控制板过温 Level1	1. The operating temperature of the motor controller is too high1.电机控制器运行温度过高

Troubleshooting steps故障诊断步骤

①Check external ambient temperature检查外部环境温度

1. Check whether the ambient temperature of the vehicle is too high.检查车辆所处环境温度是否过高。 2. Check for unusual heat sources around the vehicle.检查车辆所处周围是否有异常热源。 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 Move the vehicle away from its current environment.使车辆驶离当前环境。

②Cooling check冷却检查

1. Let the vehicle cool down for 30 minutes and check whether the fault code and symptoms are eliminated.车辆静置冷却30分钟，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 3.去步骤3。

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。