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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> External Pages >> Different car >> Section 489 (Lighting System) >> Auto Light System >> Major Components and Functions
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Major Components and Functions

WARNING: This page is about a different car, the 2007 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENTS AND FUNCTIONS CHART

Components Functions
BCM
  • Turns on/off circuits of tail light and headlamp according to signals from light sensor, lighting switch (AUTO), front door switch LH, front door switch RH, sliding door switch LH and RH, back door latch (door ajar 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)