U007588 - TroubleshootingU007588-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
U007588	D-CAN bus offlineD-CAN总线离线	1.D-CAN bus load is too high1.D-CAN总线负载过高
		2. There is an error frame on the D-CAN bus2.D-CAN总线上存在错误帧
		3. There is poor contact when connecting external devices, causing the bus to be temporarily closed.3.连接外部设备时有接触不良的情况，造成总线临时关闭

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。
②Check your surroundings检查周围环境
1. Check the surrounding environment for the presence of magnetic fields.检查周围环境是否存在磁场。 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 Drive away from the current situation.驶离当前所处环境。
③General inspection一般检查
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check whether the DCAN communication harness is damaged or broken.检查DCAN通讯线束是否存在损坏、断裂等现象。 3. Check the DCAN communication harness connector for loose connections or damage.检查DCAN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 4.去步骤4。 No否 Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。
④Check DCAN communication harness检查DCAN通讯线束
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the gateway controller harness connector IP62 and the diagnostic interface (OBD) harness connector IP25.断开网关控制器线束接插件IP62和诊断接口(OBD)线束接插件IP25。 3. Use a digital multimeter to measure the resistance between pins 7/27 of IP62 and pins 6/14 of IP25.使用数字万用表测量IP62的7/27号针脚与IP25的6/14号针脚之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω 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 Repair or replace the faulty wiring harness.维修或更换故障线束。
⑤Replace gateway controller更换网关控制器
1. Replace with a new gateway controller and check whether the fault code and symptoms are eliminated.更换新的网关控制器，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 gateway controller, you need to use a diagnostic tool to recalibrate the gateway controller.更换网关控制器后，需用诊断仪对网关控制器重新标定。