本文档为iso 7637-2:2004标准，是纯英文版的，用户可以了解这个

ISO7637协议，车载产品过标。ISO 7637-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. This third edition cancels and replaces the second edition (ISO 7637-2:2004), which has been technicall