ETC on-board unit does not workETC车载单元不工作

①Check ETC on-board unit activation status检查ETC车载单元激活状态
1. Check whether the ETC vehicle-mounted unit is activated through the WeChat applet.通过微信小程序检查ETC车载单元是否激活。 Are the test results normal?检查结果是否正常？ Yes → Go to step 2.是>>去步骤2。 No → Activate ETC vehicle unit.否>>激活ETC车载单元。
②Check fault codes检查故障码
1. Power status "OFF".电源状态“OFF”。 2. Connect the diagnostic tool.连接诊断仪。 3. Power status "ON".电源状态“ON”。 4. Use a diagnostic tool to read the fault code and check whether there is a fault.用诊断仪读取故障码，检查是否存在故障。 Check if there is a fault code?检查是否存在故障码？ Yes → Troubleshoot related faults according to the fault code.是>>根据故障码排除相关故障。 No → Go to step 3.否>>去步骤3。
③Check the wiring harness connector检查线束接插件
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 whether the ETC on-board unit wiring harness is damaged or broken.检查ETC车载单元线束是否存在损坏、断裂等现象。 3. Check whether there are loose connections or damage to the ETC vehicle unit wiring harness connector.检查ETC车载单元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 → Go to step 4.是>>去步骤4。 No → Repair or replace the faulty wiring harness or connector.否>>维修或更换故障线束或接插件。
④Check fuse检查保险丝
	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 whether the fuse IF25 in the electrical box on the instrument panel is normal.检查仪表板电器盒中保险丝IF25是否正常。 IF25：7.5A Are the test results normal?检查结果是否正常？ Yes → Go to step 5.是>>去步骤5。 No → Replace the fuse with the same specification.否>>更换相同规格保险丝。
⑤Check the ETC on-board unit power line检查ETC车载单元电源线路
	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 ETC vehicle unit harness connector BD42.断开ETC车载单元线束接插件BD42。 3. Connect the negative terminal of the 12V battery and the power status is "ON".连接蓄电池负极，电源状态“ON”。 4. Use a digital multimeter to measure the voltage between pin 4 of the BD42 and ground.用数字万用表测量BD42的4号针脚与接地之间的电压。 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 → Go to step 6.是>>去步骤6。 No → Repair or replace the ETC on-board unit power harness.否>>维修或更换ETC车载单元电源线束。
⑥Check the ETC vehicle unit grounding circuit检查ETC车载单元接地线路
	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 ETC vehicle unit harness connector BD42.断开ETC车载单元线束接插件BD42。 3. Use a digital multimeter to measure the resistance between pin 8 of the BD42 and ground.用数字万用表测量BD42的8号针脚与接地之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω Are the test results normal?检查结果是否正常？ Yes → Go to step 7.是>>去步骤7。 No → Repair or replace the ETC on-board unit grounding harness.否>>维修或更换ETC车载单元接地线束。
⑦Replacement of ETC on-board unit更换ETC车载单元
1. Replace the ETC on-board unit and check whether the fault is eliminated.更换ETC车载单元，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Find the cause from other fault symptoms.否>>从其他故障现象查找原因。   Caution:注意： ♦  After replacing the ETC vehicle-mounted unit, the ETC vehicle-mounted unit needs to be reactivated.更换ETC车载单元后，需对ETC车载单元重新激活。