Troubleshooting › Audio entertainment system › Diagnosis
B1B0911-故障诊断 · T00617175

 B1B0911 - TroubleshootingB1B0911-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
B1B0911
The second row left rear MIC signal is short-circuited to ground.二排左后MIC信号短路到地
1.MIC signal line failure1.MIC信号线故障
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 the left rear microphone harness for damage, breakage, etc.检查左后麦克风线束是否存在损坏、断裂等现象。
3. Check whether there is any loose connection or damage to the left rear microphone harness connector.检查左后麦克风线束接插件是否存在虚接、损坏等现象。
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 left rear MIC signal line检查二排左后MIC信号线路
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 left rear microphone harness connector BD102 and the vehicle infotainment head unit harness connector IP55.断开左后麦克风线束接插件BD102和车载智能多媒体主机线束接插件IP55。
3. Use a digital multimeter to measure the resistance between pin 31 of the IP55 and ground.用数字万用表测量IP55的31号针脚与接地之间的电阻。
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 second row left rear MIC signal harness.维修或更换二排左后MIC信号线束。
③Replace left rear microphone更换左后麦克风
1. Replace the left rear microphone with a new one and check whether the fault code and symptoms are eliminated.更换新的左后麦克风，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。
④Replacement of infotainment head unit更换车载智能多媒体主机
1. Replace with a new infotainment head unit and check whether the fault code and symptoms are eliminated.更换新的车载智能多媒体主机，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 infotainment head unit, it is necessary to use a diagnostic instrument to recalibrate the infotainment head unit.更换车载智能多媒体主机后，需用诊断仪对车载智能多媒体主机重新标定。