System Security

The gateway module stores a unique serial number for each component in the infotainment system. This new system, known as 'Security on MOST' replaces the radio codes used on previous audio systems.

During vehicle production, the serial number of each component is extracted from its memory and stored in the gateway module. At every subsequent ignition on cycle, the Integrated Head Unit (IHU) reads the serial number for each component and compares them to the stored serial numbers in the gateway module. If an incorrect code detected the MOST system will shut down and the infotainment system will not function.

If an infotainment component is replaced, T4 will be required to disable the security on MOST feature. A file is downloaded which extracts the new serial number from the replacement component and records it in the gateway module. T4 is used to re-enable the security on MOST feature and restore the system security.