B1B1412 - TroubleshootingB1B1412-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
B1B1412	J1-Speaker 8 circuit short to power supplyJ1-Speaker 8电路短路到电源	1. Speaker power cord failure1.扬声器电源线故障

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 dashboard midrange speaker wiring harness for damage, breakage, etc.检查仪表板中音扬声器线束是否存在损坏、断裂等现象。 3. Check the midrange speaker wiring harness connector on the instrument panel for loose connections or damage.检查仪表板中音扬声器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 wiring harness between the car's infotainment head unit and the mid-range speaker on the dashboard检查车载智能多媒体主机至仪表板中音扬声器之间的线束
	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 vehicle infotainment head unit wiring harness connector IP47 and the dashboard midrange speaker wiring harness connector IP35.断开车载智能多媒体主机线束接插件IP47和仪表板中音扬声器线束接插件IP35。 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 2/6 of the IP47 and ground.用数字万用表测量IP47的2/6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 vehicle's infotainment head unit and the midrange speaker on the dashboard.维修或更换车载智能多媒体主机至仪表板中音扬声器之间的线束。
③Replacing the dashboard midrange speaker更换仪表板中音扬声器
1. Replace the mid-range speaker on the dashboard with a new one, and check whether the fault code and symptoms are eliminated.更换新的仪表板中音扬声器，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。