Troubleshooting › Cooling system › Diagnosis
B2B0914-故障诊断 · T00677507

 B2B0914 - TroubleshootingB2B0914-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
B2B0914
Left exterior rearview mirror heating circuit short circuit to ground or open circuit左外后视镜加热回路对地短路或开路
1. The circuit loop is short-circuited or open-circuited to ground1.电路回路对地短路或开路
Troubleshooting steps故障诊断步骤
①General 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 the left exterior rearview mirror heating circuit harness for damage, breakage, loose connection, etc.检查左外后视镜加热回路线束是否存在损坏、断裂、虚接等现象。
3. Check the left exterior rearview mirror heating circuit harness connector for loose connection or damage.检查左外后视镜加热回路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 left exterior mirror heating circuit harness or connector.维修或更换左外后视镜加热回路线束或接插件。
②Check the left exterior rearview mirror heating circuit wiring检查左外后视镜加热回路线路
1. Check whether the left exterior rearview mirror heating circuit is short-circuited to ground or open.检查左外后视镜加热回路线路是否对地短路或开路。
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 Repair or replace the left exterior mirror heating circuit harness.维修或更换左外后视镜加热回路线束。
③Replace left exterior rearview mirror更换左外后视镜
1. Replace the left exterior rearview mirror and check whether the fault code and symptoms are eliminated.更换左外后视镜，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 4.去步骤4。
④Replacing the thermal management integrated module更换热管理集成模块
1. Replace the thermal management integrated module with a new one and check whether the fault code and symptoms are eliminated.更换新的热管理集成模块，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 thermal management integrated module, you need to use a diagnostic instrument to recalibrate the thermal management integrated module.更换热管理集成模块后，需用诊断仪对热管理集成模块重新标定。