Radio Programming – Calibrations or Software?

When 2018-2021 GM models equipped with an Infotainment 3 System (RPO IOR, IOS, IOT, IOU, IOV) (Fig. 26) come into the dealership with various system concerns – the radio display freezing, Bluetooth not connecting automatically, or certain features not accessible – and programming updates are determined to be needed, is the right repair to update the radio software or the radio calibration? Or both?

Fig. 26

There may be some misunderstandings about the differences between software and calibrations, which are not the same thing and are not interchangeable terms. Calibrations instruct the radio what to do while the software tells the radio how to do things.

For example, when a radio plays the welcome animation at start-up, a calibration instructs the radio which brand name and logo to display. It’s the software that tells the radio how to display those graphics, including how fast or slow to play the animation, the image size, and how long the image is displayed.

Calibration Updates

Calibrations for the radio are updated infrequently. In the Service Programming System (SPS), the radio calibrations are updated by selecting Radio – Programming. (Fig. 27)

如果更换无线电，则新模块将需要使用SPS进行校准编程，然后是软件的USB编程。请务必始终检查适当的服务信息和公告，了解相关编程的详细信息以及每个特定修复的正确编程顺序。

Fig. 27

Software Updates

软件更新更频繁地发生，以解决修复和持续改进增强功能，例如使用蓝牙，设备投影（Android Auto / Apple Carplay），Sirius XM，屏幕显示和仪器集群/驱动程序信息中心（DIC）/头部的问题-UP显示（HUD）顾虑。每个软件更新都包含先前软件版本版本的所有增强功能。

一旦编程可用，软件版本通常会通过服务公告宣布。软件释放也可以通过空中（OTA）更新远程推动到车辆。（图28）如果无法完成远程车辆更新，则必须通过USB通过SPS更新无线电。请记住，并非所有软件版本都作为OTA更新分发。

Fig. 28

在TechLine Connect中，通过选择USB文件传输来更新无线电软件。更新软件时，使用USB 2.0闪存驱动器最小容量为16 GB。

在开始更新之前

在继续使用USB文件传输以更新软件之前，请检查信息系统上的任何信息娱乐系统OTA更新。转到设置>系统选项卡>信息屏幕上的更新，以验证更新包是否已被远程下载到车辆。

如果在更新屏幕上显示了更新，则必须使用车辆上存在的下载来执行软件更新。

If there is not an update available, the build number must be verified before a software update is performed using the USB File Transfer. (Fig. 29)

Fig. 29

在未来的TechLink版本即将推出关于无线电编程的其他文章。

- 感谢Jeremy Richardson，Jeremy Krall和Zach Gillett