I have a 1992 Lexus LS400 that will not start. The service agent said the security system has activated and is preventing the car from starting. How do I reset this? The alarm on the car has activated before but it has never disabled the ignition. I recently corrected problems with charging system. I had a new alternator and new battery installed. After one day back on the road the car will not start. Is there anything that I can do?