本文件提供了无钥匙点火系统的人机界面（HMI）设计规范，无钥匙点火系统为乘用车（包括运动型多用途车和轻型卡车）和商用车（包括重型卡车和公共汽车）使用钥匙代码携带装置，与车辆推进系统无关。电气按键功能的HMI规范包括在正常情况下、紧急情况下、电池电量低时的启动，以及避免意外启动、警报和特定非标准情况。

This document provides human machine interface (HMI) design specifications for keyless ignition systems that use key code carrying device for passenger cars (including sport utility vehicles and light trucks) and commercial vehicles (including heavy trucks and buses), independent of vehicle propulsion system. HMI specifications for the electrical key functions include actuation in normal conditions, emergencies, low battery, and avoidance of inadvertent actuations, alerts and specific non-standard situations.