Troubleshooting › Keyless entry system › Diagnosis
B2E0016-故障诊断 · T00607428

 B2E0016 - TroubleshootingB2E0016-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
B2E0016
There is a fault in the power supply and the circuit voltage is below the threshold电源存在故障，电路电压低于门槛值
1. 12V battery voltage is too low1.蓄电池电压过低
Troubleshooting steps故障诊断步骤
①Check 12V battery voltage检查蓄电池电压
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. 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 3.去步骤3。
No否 Go to step 2.去步骤2。
②Check DCDC output voltage检查DCDC输出电压
1. Power status "ON".电源状态“ON”。
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 Charge the 12V battery and replace it if necessary.对蓄电池进行充电，必要时更换蓄电池。
No否 Inspect DCDC and its lines.检修DCDC及其线路。
③Check the ETC on-board unit power supply line检查ETC车载单元供电线路
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 connector BD42.断开接插件BD42。
3. Connect the negative terminal of the 12V battery and power up the vehicle.连接蓄电池负极，车辆上电。
4. Use a multimeter to measure the voltage between pins 4 and 8 of the BD42.使用万用表测量BD42的4号针脚和8号针脚之间的电压。
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 Go to step 4.去步骤4。
No否 Inspect and repair the power supply line of the ETC on-board unit.检修ETC车载单元供电线路。
④Replacement of ETC on-board unit更换ETC车载单元
1. Replace with a new ETC on-board unit and check whether the fault code and symptoms are eliminated.更换新的ETC车载单元，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 ETC vehicle-mounted unit, the ETC vehicle-mounted unit needs to be recalibrated with a diagnostic instrument.更换ETC车载单元后，需用诊断仪对ETC车载单元重新标定。