P181891 - TroubleshootingP181891-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
P181891	The resolver sin/cos square sum amplitude fluctuates excessively.旋转变压器sin/cos平方和幅值波动过大故障	1. The resolver wire harness is loose (the motor end connector is more likely to be loose)1.旋变线束松脱（电机端接插件松脱概率较大）
		2. The coaxiality deviation of the resolver installation is large, and there is looseness between the motor rotor and the rotating shaft.2.旋变安装同轴度偏差大，电机转子与转轴之间松动
		3. Circuit hardware failure3.电路硬件故障

Troubleshooting steps故障诊断步骤

①Power on check上电检查

1. Repower the vehicle, use the diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.车辆重新上电，使用诊断仪读取并清除故障码，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 2.去步骤2。

②Replacing 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。