B00012D - TroubleshootingB00012D-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
B00012D	Driver airbag circuit wiring驾驶员安全气囊回路搭线	1. Driver airbag circuit wiring1.驾驶员安全气囊回路搭线

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 driver's airbag wiring harness is damaged or broken.检查主驾驶员安全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 driver air bag wiring harness.维修或更换驾驶员安全气囊线束。
②Check the wiring harness from the airbag electronic control unit to the combination switch and clock spring assembly检查安全气囊电控单元至组合开关与时钟弹簧总成之间的线束
	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 combined switch and clock spring assembly harness connector IP32.断开安全气囊电控单元线束接插件BD51和组合开关与时钟弹簧总成线束接插件IP32。 3. Use a digital multimeter to measure the resistance between pins 23 and 24 of the BD51.用数字万用表测量BD51的23号针脚与24号针脚之间的电阻。 Standard resistance value: >1M标准电阻值：＞1M Ω 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 from the airbag electronic control unit to the combination switch and clock spring assembly.维修或更换安全气囊电控单元至组合开关与时钟弹簧总成之间的线束。
③Replace the combination switch and clock spring assembly更换组合开关与时钟弹簧总成
1. Replace the combined switch and clock spring assembly with a new one, and check whether the fault code and symptoms are eliminated.更换新的组合开关与时钟弹簧总成，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 driver airbag更换驾驶员安全气囊
1. Replace the driver's airbag with a new one and check whether the fault code and symptoms are eliminated.更换新的驾驶员安全气囊，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 5.去步骤5。
⑤Replace 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。