Troubleshooting › Seat › Diagnosis
B2B6715-故障诊断 · T00671089

 B2B6715 - TroubleshootingB2B6715-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
B2B6715
Rear left seat heating high-end output open circuit or short power supply后左座椅加热高端输出开路或短电源
1. Abnormal heating pad1.加热垫异常
2. Abnormal heating harness2.加热线束异常
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 rear left seat heating wiring harness for damage, breakage, etc.检查后排左座椅加热线束是否存在损坏、断裂等现象。
3. Check whether there is any loose connection or damage to the rear left seat heating harness connector.检查后排左座椅加热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 rear left seat heating high-end output circuit检查后排左座椅加热高端输出线路
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 seat ventilation and heating module harness connector BD112, the left seat cushion heating harness connector AS05 and the left backrest heating harness connector AS06.断开座椅通风加热模块线束接插件BD112、左座垫加热线束接插件AS05和左靠背加热线束接插件AS06。
3. Use a digital multimeter to measure the resistance between pin 12 of BD112 and pin 1 of AS05.用数字万用表测量BD112的12号针脚与AS05的1号针脚之间的电阻。
Standard resistance value: <1标准电阻值：＜1 Ω
Graphic
d. Use a digital multimeter to measure the resistance between pin 12 of BD112 and pin 1 of AS06.d.用数字万用表测量BD112的12号针脚与AS06的1号针脚之间的电阻。
Standard resistance value: <1标准电阻值：＜1 Ω
Graphic
e. Connect the negative terminal of the 12V battery, and the power status is "ON".e.连接蓄电池负极，电源状态“ON”。
f. Use a digital multimeter to measure the voltage between pin 12 of BD112 and ground.f.用数字万用表测量BD112的12号针脚与接地之间的电压。
Standard voltage value: about 0V标准电压值：约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 rear left seat heated high-end output wiring harness.维修或更换后排左座椅加热高端输出线束。
③Replace the rear left seat cushion heating更换后排左座垫加热
1. Replace the rear left seat cushion with a new one and check whether the fault code and symptoms are eliminated.更换新的后排左座垫加热，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 rear left backrest heating更换后排左靠背加热
1. Replace the rear left backrest with a new one and check whether the fault code and symptoms are eliminated.更换新的后排左靠背加热，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。
⑤Replace seat ventilation and heating module更换座椅通风加热模块
1. Replace the seat ventilation and heating module with a new one, and check whether the fault code and symptoms are eliminated.更换新的座椅通风加热模块，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：
♦  When replacing the seat ventilation and heating module, you need to use a diagnostic tool to recalibrate the seat ventilation and heating module.更换座椅通风加热模块，需用诊断仪对座椅通风加热模块重新标定。