B2E8311 - TroubleshootingB2E8311-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
B2E8311	Speaker J1-Speaker 4 circuit shorted to ground扬声器J1-Speaker 4电路短路到地	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 right front door midrange speaker and right front tweeter speaker harness for damage, breakage, etc.检查右前门中音扬声器与右前高音扬声器线束是否存在损坏、断裂等现象。 3. Check whether the wiring harness connectors of the right front door midrange speaker and the right front tweeter speaker are connected or damaged.检查右前门中音扬声器与右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 right front speaker检查车载智能多媒体主机至右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 right front door midrange speaker harness connector FR10, and the right front tweeter harness connector BD48.断开车载智能多媒体主机线束接插件IP48和右前门中音扬声器线束接插件FR10、右前高音扬声器线束接插件BD48。 3. Use a digital multimeter to measure the resistance between pin 2/6 of the IP48 and ground.用数字万用表测量IP48的2/6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 wiring harness between the vehicle's infotainment head unit and the right front speaker.维修或更换车载智能多媒体主机至右前扬声器之间的线束。
③Replace right front door midrange speaker更换右前门中音扬声器
1. Replace the right front door mid-range speaker with a new one and check whether the fault code and symptoms are eliminated.更换新的右前门中音扬声器，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 the front right tweeter更换右前高音扬声器
1. Replace the front right tweeter with a new one and check whether the fault code and symptoms are eliminated.更换新的右前高音扬声器，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。