System Description: Outline

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

The auto light control system has an optical sensor inside it that detects outside brightness.

When the lighting switch is in "AUTO" position, it automatically turns on/off the parking lamps and the headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the setting, Refer to "SETTING CHANGE FUNCTIONS ".

Optical sensor, power is supplied

from BCM (body control module) terminal 45
to optical sensor terminal 1.

Optical sensor, ground is supplied

from BCM (body control module) terminal 53
to optical sensor terminal 3.

When ignition switch is turn to "ON" position, and

When outside brightness is darker than prescribed level, input is supplied

to BCM (body control module) terminal 38
from optical sensor terminal 2.

The headlamps will then illuminate. For a description of headlamp operation, Refer to SYSTEM DESCRIPTION in HEADLAMP (FOR USA) - SEDAN article or SYSTEM DESCRIPTION in HEADLAMP (FOR CANADA) - SEDAN article