This communication is informing dealer principals, general managers, service managers & parts managers of a Technical Service Bulletin initiated by Gulf States Toyota, Inc. (GST) to inspect and repair Toyota Rav4 and Corolla vehicles equipped with a Premium Security System which exhibit improper function of the alarm due to an open Power Outlet No.1 fuse. The Non-Toyota Premium Security Systems were installed as a GST installed option under GST P/N 00012-V1320-01 and 00012-V1620-01.