B100400 - TroubleshootingB100400-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
B100400	Front collision detected检测到前碰碰撞	1. Frontal collision occurs1.发生前碰碰撞

Troubleshooting steps故障诊断步骤

①Replace airbag electronic control unit and airbag更换安全气囊电控单元和气囊

Replace the airbag electronic control unit and the damaged airbag with a new one, and check whether the fault code and symptoms are eliminated.更换新的安全气囊电控单元和损坏的气囊，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：

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After replacing the airbag electronic control unit, you need to use a diagnostic tool to recalibrate the airbag electronic control unit.更换安全气囊电控单元后，需用诊断仪对安全气囊电控单元重新标定。