Protected Functions
有两种保护级别：
- 具有标准访问级别的电子钥匙和非电子钥匙
- 具有主访问级别的电子钥匙（出厂密码）
下面介绍每个级别的要求：
具有标准访问级别的电子钥匙和非电子钥匙
- 可以查看但不能修改 MSS 钥匙表。
- 可以查看但不能修改 MSS 的配置设定。
具有主访问级别的电子钥匙
通过维修工具修改任何设定需要出厂密码或主访问级别。
- 可以修改 MSS 的设定。
- 可以修改有效钥匙 ID 的列表。
- 可以清除记录的事件。
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