B2B0519 - TroubleshootingB2B0519-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
B2B0519	Rearview mirror folding motor relay stuck后视镜折叠电机继电器粘连	1. The door module folding motor relay is abnormal.1.门模块折叠电机继电器异常

Troubleshooting steps故障诊断步骤

①Power on and check (take the left front door rearview mirror as an example)上电检查(以左前门后视镜为例)

1. Power on the vehicle again and check whether the fault code and symptoms are eliminated.车辆重新上电，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。

②Replace left front door control module更换左前门控制模块

1. Replace the left front door control module with a new one and check whether the fault code and symptoms are eliminated.更换新的左前门控制模块，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 left front door control module, you need to use a diagnostic tool to recalibrate the left front door control module.更换左前门控制模块后，需用诊断仪对左前门控制模块重新标定。