U059481 - TroubleshootingU059481-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
U059481	The data received by the electric oil pump from the DCU is invalid电动油泵从DCU接收的数据无效	1. Poor contact of connector1.接插件接触不良
		2.CAN bus load rate is too high2.CAN总线负载率过高
		3. The CAN circuit on the hardware is damaged.3.硬件上CAN电路损坏

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Check whether the ECAN communication harness is damaged or broken.检查ECAN通讯线束是否存在损坏、断裂等现象。 2. Check the ECAN communication harness connector for loose connections or damage.检查ECAN通讯线束接插件是否存在虚接、损坏等现象。 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 Repair or replace the ECAN communication harness or connector.维修或更换ECAN通讯线束或接插件。

②Power 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 3.去步骤3。

③Check for electromagnetic interference检查电磁干扰

1. Check for sources of magnetic fields around the vehicle.检查车辆周围是否存在磁场源。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 4.去步骤4。 No否 Move the vehicle away from its current environment.使车辆驶离当前环境。

④Check DCU fault code检查DCU故障码

1. Use a diagnostic tool to read the DCU fault code and check whether there is a fault in the integrated electric drive assembly.使用诊断仪读取DCU故障码，检查集成电力驱动总成是否存在故障。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 5.去步骤5。 No否 Troubleshoot the integrated electric drive assembly fault according to the fault code.根据故障码排除集成电力驱动总成故障。

⑤Replace oil pump controller更换油泵控制器

1. Replace the oil pump controller with a new one and check whether the fault code and symptoms are eliminated.更换新的油泵控制器，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 oil pump controller, you need to use a diagnostic instrument to recalibrate the oil pump controller.更换油泵控制器后，需用诊断仪对油泵控制器重新标定。