B2E8212 - TroubleshootingB2E8212-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
B2E8212	Speaker J1-Speaker 3 circuit short to power supply扬声器J1-Speaker 3电路短路到电源	1. Speaker power supply failure1.扬声器供电故障

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 front door midrange speaker and left front tweeter wire harness for damage, breakage, etc.检查左前门中音扬声器与左前高音扬声器线束是否存在损坏、断裂等现象。 3. Check the left front door midrange speaker and left front tweeter harness connectors for loose connections or damage.检查左前门中音扬声器与左前高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 left front speaker检查车载智能多媒体主机至左前扬声器之间的线束
	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 harness connector IP48, the left front door midrange speaker harness connector FL10, and the left front tweeter harness connector BD49.断开车载智能多媒体主机线束接插件IP48和左前门中音扬声器线束接插件FL10、左前高音扬声器线束接插件BD49。 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 1/5 of the IP48 and ground.用数字万用表测量IP48的1/5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 left front speaker.维修或更换车载智能多媒体主机至左前扬声器之间的线束。
③Replace left front door midrange speaker更换左前门中音扬声器
1. Replace the left front door mid-range speaker with a new one and check whether the fault code and symptoms are eliminated.更换新的左前门中音扬声器，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。
④Replace left front tweeter更换左前高音扬声器
1. Replace the front left tweeter with a new one and check whether the fault code and symptoms are eliminated.更换新的左前高音扬声器，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 5.去步骤5。
⑤Replacement 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。