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B2B0017-故障诊断 · T00671098

 B2B0017 - TroubleshootingB2B0017-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
B2B0017
The input voltage is higher than the upper limit value输入电压高于上限值
1. Abnormal power supply wiring harness1.供电线束异常
2. The power supply module is abnormal2.供电模块异常
Troubleshooting steps故障诊断步骤
①Power on check上电检查
1. Repower the vehicle, use the diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.车辆重新上电，使用诊断仪读取并清除故障码，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 2.去步骤2。
②Check 12V battery voltage检查蓄电池电压
1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。
Standard voltage value: about 12.5V标准电压值：约12.5V
Are the test results normal?检查结果是否正常？
Yes是 Go to step 4.去步骤4。
No否 Go to step 3.去步骤3。
③Check DCDC output voltage检查DCDC输出电压
1. The vehicle is powered on.车辆上电。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。
Standard voltage value: about 14V标准电压值：约14V
Are the test results normal?检查结果是否正常？
Yes是 Discharge the 12V battery.对蓄电池进行放电。
No否 Inspect DCDC and its lines.检修DCDC及其线路。
④Check the power supply voltage of the seat ventilation and heating module检查座椅通风加热模块供电电压
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 BD111.断开座椅通风加热模块线束接插件BD111。
3. Connect the negative terminal of the 12V battery.连接蓄电池负极。
4. Use a digital multimeter to measure the voltage between pins 10/12 of BD111 and ground.用数字万用表测量BD111的10/12号针脚与接地之间的电压。
Standard voltage value: about 12.5V标准电压值：约12.5V
Are the test results normal?检查结果是否正常？
Yes是 Go to step 5.去步骤5。
No否 Repair or replace the seat ventilation and heating module power supply wiring harness.维修或更换座椅通风加热模块供电线束。
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。