Auto Light System

System Description
Automatically turns on/off the 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 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 17
- to optical sensor terminal 1.

Optical sensor, ground is supplied
- from BCM (body control module) terminal 18
- 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 14
- from optical sensor terminal 2.

The headlamps will then illuminate. For a description of headlamp operation, refer to "System Description"

COMBINATION SWITCH READING FUNCTION
Refer to "COMBINATION SWITCH READING FUNCTION" in Body Control Module.

EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the AUTO position, and the ignition switch is turned from ON or ACC to OFF, and one of the front door is opened, the battery saver control feature is activated.
Under this condition, the headlamp remain illuminated for 5 minutes, then the headlamp are turned off. Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.

DELAY TIMER FUNCTION
- When ignition switch ON and ACC are OFF while auto light switch is ON, BCM turn on/off headlamp. In delay timer function, auto timer sensor power source is OFF and BCM is not turned on/off by auto sensor signal. On condition that:
- when the states ignition switch ON or ACC is ON and output judgment by auto light function is headlamp ON turn to ignition switch ON or ACC are OFF and door switch (driver side), door switch (passenger side) is ON, output judgment by auto light function should be headlamp ON for 5 minutes by tamer. After time out, output judgment by auto light function should be headlamp OFF.
- when the state is door switch (driver side), door switch (passenger side) is turner to ON from OFF 45 seconds or 5 minutes while timer is counting, timer stops, and re-start counting for 5 minutes, then auto light function judges output as headlamp ON. After time out, auto light function judges output as headlamp OFF.
- when the states door witch (driver side), door switch (passenger side), is ON turns to door witch (driver side), front door switch (passenger side), are OFF 45 seconds or 5 minute while is counting, Timer stops, and re-start counting for 45 seconds, then auto light function judges output as headlamp ON. After timer out, auto light function judges output as headlamp OFF.
- when the state is ignition switch ON or ACC is ON or auto light switch OFF while timer is counting, timer stops counting and BCM turns on/off lamps according to headlamp function, front fog lamp function, auto light function and headlamp battery save function.

Delay timer control mode can be changed by the function setting of CONSULT-II.

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic 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
Refer to Information Bus.

Major Components And Functions:

Major Components and Functions