Auto Light Operation: Notes

WARNING: This page is about a different car, the 2003 Infiniti M45. 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 (clearance) 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 FUNCTION FOR AUTO LIGHT SYSTEM ".

When lighting switch is in "AUTO" position, ground is supplied

to BCM terminal 14
from lighting switch terminal 42.

When ignition switch is turn to "ON" or "START" position and

Outside brightness is darker than prescribed level, ground is supplied

to headlamp relay-1 terminal 1
to headlamp relay-2 terminal 2
through headlamp battery saver control unit terminal 2, 8 and 4,11, and
to tail lamp relay terminal 1
through headlamp battery saver control unit terminals 6,14 and 4,11.

Then headlamp relay-1, 2 and tail lamp relay are energized, headlamps (low or high) and tail lamps are illuminate according to switch position.