If the key fob button has been pressed numerous times while away from the vehicle, the key fob may fall out of synchronization with the security system. If this happens, the security system might fail to recognize the key fobs commands.
To solve this problem, press and hold the key fob button for 10-15 seconds until the security system responds with two turn signal flashes. After confirmation, you may resume normal key fob operation.
Siren Diagnostics
Figure 1. Siren