I believe that is the security system, but I could be wrong. If I remember correctly that is the part number for the TSSM. I think it just gives you the number for itself.
It is a part number for the module you just checked. The system displays the P/N after going through the code process. Perfectly normal and nothing to be concerned with.
It is a part number for the module you just checked. The system displays the P/N after going through the code process. Perfectly normal and nothing to be concerned with.