HOD steering wheel hand off detection does not workHOD方向盘离手检测不工作

①Check the wiring harness connector检查线束接插件
1. Check whether the combined switch and clock spring assembly wiring harness is damaged or broken.检查组合开关与时钟弹簧总成线束是否存在损坏、断裂等现象。 2. Check whether the combination switch and clock spring assembly wiring harness connectors are connected or damaged.检查组合开关与时钟弹簧总成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 2.是>>去步骤2。 No → Repair or replace the faulty wiring harness or connector.否>>维修或更换故障线束或接插件。
②Check the combination switch and clock spring assembly fault code检查组合开关与时钟弹簧总成故障码
1. Use a diagnostic tool to read the fault code of the combination switch and clock spring assembly, and check whether there is a fault in the combination switch and clock spring assembly.使用诊断仪读取组合开关与时钟弹簧总成故障码，检查组合开关与时钟弹簧总成是否存在故障。 Are the test results normal?检查结果是否正常？ Yes → Go to step 3.是>>去步骤3。 No → Troubleshoot the fault of the combined switch and clock spring assembly according to the fault code.否>>根据故障码排除组合开关与时钟弹簧总成故障。
③Check 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 IF02 in the electrical box on the instrument panel is normal.检查仪表板电器盒中保险丝IF02是否正常。 IF02：7.5A Are the test results normal?检查结果是否正常？ Yes → Go to step 4.是>>去步骤4。 No → Replace the fuse with the same specification.否>>更换相同规格保险丝。
④Check the combination switch and clock spring assembly ACC power circuit检查组合开关与时钟弹簧总成ACC电源线路
	1. The power status is "ON" and HOD steering wheel hands-off detection is turned on.电源状态“ON”，开启HOD方向盘离手检测。 2. Use a digital multimeter to measure the voltage between pin 1 of the IP34 connector of the combination switch and clock spring assembly harness and ground.用数字万用表测量组合开关与时钟弹簧总成线束接插件IP34的1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 5.是>>去步骤5。 No → Repair or replace the combined switch and clock spring assembly ACC power harness.否>>维修或更换组合开关与时钟弹簧总成ACC电源线束。
⑤Check the grounding circuit of the combination switch and clock spring assembly检查组合开关与时钟弹簧总成接地线路
	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 combination switch and clock spring assembly harness connector IP34.断开组合开关与时钟弹簧总成线束接插件IP34。 3. Use a digital multimeter to measure the resistance between pin 3 of the IP34 and ground.用数字万用表测量IP34的3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 6.是>>去步骤6。 No → Repair or replace the combination switch and clock spring assembly grounding harness.否>>维修或更换组合开关与时钟弹簧总成接地线束。
⑥Check the LIN circuit of the combination switch and clock spring assembly检查组合开关与时钟弹簧总成LIN线路
1. Check whether the LIN line of the combination switch and clock spring assembly is normal.检查组合开关与时钟弹簧总成LIN线路是否正常。 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 combined switch and clock spring assembly LIN harness.否>>维修或更换组合开关与时钟弹簧总成LIN线束。
⑦Replace the combination switch and clock spring assembly更换组合开关与时钟弹簧总成
1. Replace the combination switch and clock spring assembly and check whether the fault is eliminated.更换组合开关与时钟弹簧总成，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 combination switch and clock spring assembly, you need to use a diagnostic instrument to recalibrate the combination switch and clock spring assembly.更换组合开关与时钟弹簧总成后，需用诊断仪对组合开关与时钟弹簧总成重新标定。