B100C12 - TroubleshootingB100C12-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
B100C12	The middle seat belt buckle of the second row has a short circuit to the power supply.第二排中间安全带锁扣对电源短路	1. The middle seat belt buckle of the second row is short-circuited to the power supply.1.第二排中间安全带锁扣对电源短路

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 whether the second row middle seat belt buckle harness is damaged or broken.检查第二排中间安全带扣线束是否存在损坏、断裂等现象。 3. Check the second row middle seat belt buckle harness connector for damage, loose connection, etc.检查第二排中间安全带扣线束接插件是否存在损坏、虚接等现象。 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 faulty wiring harness or connector.维修或更换故障线束或接插件。
②Check the second row middle seat belt buckle circuit检查第二排中间安全带扣线路
	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 airbag electronic control unit harness connector BD51 and the second row middle seat belt buckle harness connector BD85.断开安全气囊电控单元线束接插件BD51和第二排中间安全带扣线束接插件BD85。 3. Connect the negative terminal of the 12V battery and the power status is "ON".连接蓄电池负极，电源状态“ON”。 4. Use a digital multimeter to measure the voltage between pin 1/2 of the BD85 and ground.用数字万用表测量BD85的1/2号针脚与接地之间的电压。 Standard voltage value: 0V标准电压值：0V 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 second row middle seat belt buckle harness.维修或更换第二排中间安全带扣线束。
③Replace the second row middle seat belt buckle更换第二排中间安全带扣
1. Replace the second-row middle seat belt buckle with a new one, and check whether the fault code and symptoms are eliminated.更换新的第二排中间安全带扣，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。
④Replace airbag electronic control unit更换安全气囊电控单元
1. Replace the airbag electronic control unit 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，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 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。