Troubleshooting › Air bag system › Diagnosis
B000512-故障诊断 · T00607147

 B000512 - TroubleshootingB000512-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
B000512
Front center airbag circuit short circuit to power supply前排中央气囊回路对电源短路
1. The front center airbag circuit is short-circuited to the power supply.1.前排中央气囊回路对电源短路
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 front center airbag wiring harness is damaged or broken.检查前排中央气囊线束是否存在损坏、断裂等现象。
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 front center airbag wiring harness.维修或更换前排中央气囊线束。
②Check the wiring harness between the airbag electronic control unit and the front center airbag检查安全气囊电控单元至前排中央气囊之间的线束
Graphic
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 front center airbag harness connector BD65.断开安全气囊电控单元线束接插件BD51和前排中央气囊线束接插件BD65。
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 3/4 of BD51 and ground.用数字万用表测量BD51的3/4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 wiring harness between the airbag electronic control unit and the front center airbag.维修或更换安全气囊电控单元至前排中央气囊之间的线束。
③Replace front center airbag更换前排中央气囊
1. Replace the front center airbag with a new one and check whether the fault code and symptoms are eliminated.更换新的前排中央气囊，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 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。