Major Components and Functions

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

AUTO LIGHT SYSTEM MAJOR COMPONENTS FUNCTIONS

Components	Functions
BCM	Turns on/off circuits of tail light and headlamp according to signals from light sensor, lighting switch (AUTO), driver door switch, passenger door switch, rear door switch, and ignition switch (ON, OFF).
Optical sensor	Converts ambient light (lux) to voltage, and sends it to BCM. (Detects lightness of 50 to 1, 300 lux)