B2B6915 - TroubleshootingB2B6915-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
B2B6915	The NTC temperature acquisition input of the rear left seat is open circuit or short circuited to the power supply.后左座椅NTC温度采集输入开路或者短路到电源	1.NTC temperature sensor is abnormal1.NTC温度传感器异常
		2.NTC temperature sensor wiring harness is abnormal2.NTC温度传感器线束异常

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 NTC temperature acquisition input harness of the rear left seat for damage, breakage, etc.检查后排左座椅NTC温度采集输入线束是否存在损坏、断裂等现象。 3. Check the NTC temperature acquisition input harness connector of the rear left seat to see if there is any loose connection or damage.检查后排左座椅NTC温度采集输入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 NTC temperature acquisition input circuit of the rear left seat检查后排左座椅NTC温度采集输入线路
	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 and the left seat cushion heating harness connector AS05.断开座椅通风加热模块线束接插件BD112和左座垫加热线束接插件AS05。 3. Use a digital multimeter to measure the resistance between pin 6 of BD112 and pin 2 of AS05.用数字万用表测量BD112的6号针脚与AS05的2号针脚之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω
	d. Connect the negative terminal of the 12V battery, and the power status is "ON".d.连接蓄电池负极，电源状态“ON”。 e. Use a digital multimeter to measure the voltage between pin 6 of BD112 and ground.e.用数字万用表测量BD112的6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 NTC temperature acquisition input harness of the rear left seat.维修或更换后排左座椅NTC温度采集输入线束。
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 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。