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Infiniti FX35 / FX45. Manual - part 788

AUTO LIGHT SYSTEM

LT-47

< SERVICE INFORMATION >

AUTO LIGHT SYSTEM

Component Parts and Harness Connector Location

INFOID:0000000001328306

System Description

INFOID:0000000001328307

Automatically turns ON/OFF parking lamps and the headlamps in accordance with ambient light.
Timing for when the lamps turn ON/OFF can be selected using four modes.

OUTLINE

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 head-
lamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the set-
ting, Refer to

LT-55, "Preliminary Check"

Optical sensor control mode can be changed by the function setting of CONSULT-III or display.
Optical sensor, power is supplied
• from BCM (body control module) terminal 17
• to optical sensor terminal 1.
Optical sensor, ground is supplied
• to optical sensor terminal 3
• through BCM terminal 18.
When ignition switch is turn to ON position, and
When outside brightness is darker than prescribed level, input is supplied
• from optical sensor terminal 2
• to BCM terminal 14

PKIB3474E

LT-48

< SERVICE INFORMATION >

AUTO LIGHT SYSTEM

The headlamps will then illuminate. For a description of headlamp operation, Refer to

LT-5, "System Descrip-

tion"

COMBINATION SWITCH READING FUNCTION

Refer to

BCS-4, "System Description"

DELAY TIMER FUNCTION

Delay timer function carries out a function that BCM activates the timer and controls lights out of headlamps by
door switch signal and lightning switch signal when turning the Ignition switch OFF while it is ON and head-
lamps are ON by the auto light function.
Timer types are a 5 minute timer and a 45 second timer
• When opening any door (door switch is ON), the 5 minute timer starts and then headlamps go out 5 minutes

later

• When all the doors are closed (from door switch ON to OFF), the 45 second timer starts and then headlamps

go out 45 seconds later. If any door is opened (door switch ON) while the 45 second timer is in operation, the
5 minute timer starts again

• The timer stops when turning on the ignition switch or turning off the auto light switch under the above condi-

tions.

Delay timer control mode can be changed by the function setting of CONSULT-III or display.

CAN Communication System Description

INFOID:0000000001328308

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit

INFOID:0000000001328309

Refer to

LAN-43, "CAN System Specification Chart"

Major Component and Functions

INFOID:0000000001328310

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