B00202D - TroubleshootingB00202D-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
B00202D	Driver's side airbag circuit wiring驾驶员侧气囊回路搭线	1. Driver side airbag circuit wiring1.驾驶员侧气囊回路搭线

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 left airbag connector assembly is firm and reliable.检查左侧气囊接插件装配是否牢固、可靠。 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 Reconnect the left air bag connector.重新连接左侧气囊接插件。
②Check the wiring harness from the airbag electronic control unit to the left airbag检查安全气囊电控单元至左侧气囊之间的线束
	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 BD52 and the left airbag harness connector BD66.断开安全气囊电控单元线束接插件BD52和左侧气囊线束接插件BD66。 3. Use a digital multimeter to measure the resistance between pins 19 and 20 of the BD52.用数字万用表测量BD52的19号针脚与20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 left airbag.维修或更换安全气囊电控单元至左侧气囊之间的线束。
③Replace left air bag更换左侧气囊
1. Replace the left airbag with a new one and check whether the fault code and symptoms are eliminated.更换新的左侧气囊，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。