车机触摸键不亮的问题可能由多种原因引起，以下是一步步的排查和解决建议，如何排查和解决车机触摸键不亮的问题

检查保险丝：

• locate the fuse box in your vehicle, which is typically found near the driver's seat or inside the glove compartment.
• identify the fuse responsible for the car stereo system. This information can usually be found in the vehicle's manual.
• inspect the fuse for signs of blowing or damage. If the fuse is damaged, replace it with an exact match in terms of amperage and voltage specified in your vehicle's manual.

检查触摸键连接：

• access the car stereo unit by removing the faceplate or accessing the internal components. Be cautious and refer to the vehicle's manual if you're unsure about the disassembly process.
• examine the touch button connectors to ensure they are securely fastened and free from corrosion or damage. If any connections appear loose or damaged, reseat them firmly or replace the faulty wiring as needed.

检查触摸键硬件：

• inspect the LED indicators on the touch buttons to check for any signs of malfunction or dimming. If the LEDs are not functioning properly, it may indicate a need for replacing the touch button module or the LED components.
• if you're not confident in your ability to diagnose or repair internal components, it's advisable to consult a professional technician to avoid causing further damage to the system.

考虑软件问题：

如果硬件部分没有问题,可以考虑检查车载主机的软件系统，查阅车辆的用户手册，了解如何进行系统更新或恢复出厂设置，通过车载菜单系统，导航至设置或更新选项，按照提示完成软件更新或系统重置，如果不确定操作步骤，建议联系车辆制造商的技术支持部门获取指导。

寻求专业帮助：

如果经过上述步骤仍无法解决问题,建议及时联系授权的汽车维修服务中心，专业的 technicians拥有必要的工具和知识，能够更准确地诊断和修复问题，在寻求外部帮助之前，尽量收集所有相关的故障信息，如错误代码、故障现象等，以便技术人员更快地定位问题根源。