Security Indicator Light Circuit: Description
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
While the theft deterrent system is preparing itself to be set, this circuit lights up the security indicator light. When the system is set, it continuously turns the indicator light on for 0.2 seconds and then turns it off for 1.8 seconds, thus the indicator light blinks.