Automatic Headlights Off Delay System
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
Trouble shooting of the automatic headlights off delay system is done by the body control system. See BODY CONTROL SYSTEMS - AVALON article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. The body control electronic control unit (ECU) monitors various sensors and switches to properly operate and control the automatic headlights off delay system.