B386504 - TroubleshootingB386504-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
B386504	There is a fault in the liquid cooling control system and there is an internal fault in the system.液冷控制系统存在故障，系统内部故障	1. Liquid cooling control system message is invalid1.液冷控制系统消息无效
		2. The liquid cooling control system sends a fault message2.液冷控制系统发送故障消息

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 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 thermal management integrated module fault code and check whether there is a fault in the thermal management integrated module.使用诊断仪读取热管理集成模块故障码，检查热管理集成模块是否存在故障。 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 Troubleshoot the thermal management integrated module according to the fault code.根据故障码排除热管理集成模块故障。

③Replacing the autonomous driving domain controller更换自动驾驶域控制器

1. Replace with a new autonomous driving domain controller and check whether the fault code and symptoms are eliminated.更换新的自动驾驶域控制器，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 autonomous driving domain controller, you need to use a diagnostic tool to recalibrate the autonomous driving domain controller.更换自动驾驶域控制器后，需用诊断仪对自动驾驶域控制器重新标定。