Auto Lighting SystemAuto Lighting System

HIDHID(High Intensity Discharge) (High Intensity Discharge)

AHLSAHLS(Auto Headlamp Leveling (Auto Headlamp Leveling

System)System)

Auto Lighting SystemAuto Lighting System

Auto lighting system introduction

Auto lighting system is automatically turn on and off

the tail & headlamp device according to surrounding

brightness.

That is, when select lighting switch goes to “Auto”

position, sensor detects surrounding illumination

change, automatically turn on and off the tail and head

lamp device without any other operation.

The sensor which senses lightness of surrounding has

been attached on the crush pad top portion and

become to sensor and module all

Auto light solar sensor – Function

Role of Solar Sensor

This sensor outputs an electric current according to the light quantity

and transmits it to the control module so that head lamp and tail lamp

relays are driven according to the

light quantity and then lamp relays operate.

Auto light solar sensor - Principle

Principle of Sensing

When electric current is inputted on the base of controller

power transmitter from solar sensor in the following circuit

according to insulation, transmitter turns on so as to

light the lamp

Lamp

BATT 12V Solar Sensor

Controller

Auto light solar sensor – Characteristics

Output current Characteristics by quantity of solar radiation

0 1 2 3 4 5 6 7 8 9 10

600

500

400

300

200

100

0

Outp

ut

Curr

ent(

nano

am

pere

)

Lux(×10,000)

mA

Auto light sensor module

Specification

Item Specification

Rated voltage 12 volts

Working voltage 9 ~ 16 volts

Load Max 200mA relay load

Working Temperature-30 ~ +80℃ ℃

Conservation temperature

-40 ~ +120℃ ℃

Install location On the crash pad

Auto light inputs & outputs

Inputs Signal

Auto light switch

IGN, Switch

Solar sensor signal

Ground

Inputs Signal

Auto light switch

IGN, Switch

Solar sensor signal

Ground

Controller

CPU for Auto light control

TR1 for tail lamp relay

TR2 for head lamp relay

Controller

CPU for Auto light control

TR1 for tail lamp relay

TR2 for head lamp relay

OutputsTail lamp relay

Head lamp relay

OutputsTail lamp relay

Head lamp relay

System Block Diagram

◆ According to the position of tail lamp Switch, the tail lamp is ON or OFF.

◆ If the driver’s side door is opened with the tail lamp ON and Ignition Key OFF lamp is OFF automatically.(Tail Lamp Auto Cut)

◆ According to the position of head lamp switch, the head lamp is ON and OFF.

◆ If ignition Key OFF is with the head lamp ON the head lamp is OFF.

◆ The Tail lamp & Head lamp is ON/OFF automatically regardless the driver intention according to the surroundings brightness.

◆ The auto ON and OFF of lamp is controlled by Auto Light Sensor.

Switch Position

Tail Lamp

Head Lamp

Auto

Manual

Auto

Lamp operation Description

Tail Lamp ON

Head Lamp OFF

Head Lamp & TailLamp automatic-ally ON/OFF

Auto light ON & Off condition

Operation by switch position

Condition of Lamp “ON & OFF”

Auto Light function condition.

1. Ignition Key S/W “ON”

2. Light S/W “Auto Position

Tail lamp Head lamp

Turn ON 23.1 Lux(0.52-0.56volt) 6.2 Lux(0.36-0.37volt)

Turn OFF48.1 LLux(0.86-

0.96Volt)12 Lux(0.52-0.56volt)

Auto Light Operation ON/OFF

500 ms Later “ON”

12 Lux (0.52 Volt)6.2 Lux (0.36 Volt)

23.1 Lux (0.78 Volt) 48.1 Lux (1.3 Volt)

3 sec. Later “Off”

Tail Lamp

Illumination

Head Lamp

Illumination

ON

OFF

OFF

ON

Time Chart

Auto Light Operation Characteristics 1

Operation Characteristics 1 Tail Lamp Auto Cut Function (IG S/W ON and Off and Door Open)

IGN. KEY

Tail LampSwitch

Tail Lamp

Door SW

ON

OFF

OFF

ON

ON

ON(open)

OFF

OFF(close)

Operation Characteristics 2

Tail Lamp Auto Cut (IG. ON with Door Open)

IGN. KEY

Tail LampSwitch

Tail Lamp

Door SW

ON

OFF

OFF

ON

ON

ON(open)

OFF

OFF(close)

Auto Light Operation Characteristics 2

Auto Light Operation Characteristics 3 Tail Lamp Auto Cut (Auto S/W “ON” and Door Open)

IGN. KEY

Tail LampSwitch Auto

Tail Lamp

Door SW

ON

OFF

OFF

ON

ON

ON(open)

OFF

OFF(close)

Tail LampON Condition

ON

OFF

Auto Light Operation Characteristics 3

Auto Lighting Circuit

◐ Pin Voltage check

Pin No.

IG. & Auto switch ON

at condition of lamp OFF

at condition of lamp ON

1

2

3

4

5

6

Auto mode Auto mode

IGN.Off IGN.ON

AM Acc IG1 IG2 ST

Acc

ON

ST

EB HL HU HS2

Lo

Hi

P

TS HS1 G AT

Off

Tail

H/L

Auto

BATT.

5

1

2

3

6

Tail Lamp RLY

Head Lamp RLYHead Lamp

Tail Lamp

ETACS

DashFuse Box

Multi Function switchIgnition Switch

FusibleLink

AutoLightSensor

Circuit Diagram

HIDHID(High Intensity (High Intensity

Discharge)Discharge)

HID(High Intensity Discharge) Head-lamp

General

The HID System, that is different to currently existing 

Halogen bulbs that emit a DC 12V filament, the Ballast

and Igniter changes the voltage of 12V into 20,000V

it is a headlamp that does not contain a filament that

emits light through discharging electrodes from

a Xenon Gas Capsule

HID Headlamp characteristics

★ The principle of lighting

★ BULB Characteristics

No light, if the voltage of power is beyond

the specification(Specification : 9 ~ 16 volt)

★ Constituents of Bulb gas XEMON GAS : Fast light On at beginning.

HID Speciation

ITEM Spec.

Rated voltage 12 volts

Minimum operating voltage9 volts

Range of operating voltage 9 ~ 16 volts

MAX. Current 20 Ampere

Starting CurrentMaximum below 17 Ampere for 10

seconds

Rated current 3.18 Ampere

Output current 35W±1W at 25℃

Housing range of temperature

－ 40 ~ 105℃ ℃

Halogen Bulb vs. HID BULB Comparison

ITEM UNIT HALLOGEN BULB HID BULB

Luminous Flues (at 12 volt) Lm 1360 3000

Average Luminous Cd/ ㎠ 3000 6000

Color Temperature K 3500 4200

Power Consumption (at 12 volt) W(watt) 55 35

Luminous Efficiency (at 12 volt) Im/w 26.8 85

Life Time (at 14 volt) h 650 2000

Halogen Bulb vs. HID BULB

HID headlamp system components & function

Igniter Socket

Bulb

Ballast

BulbBulb

IgniterIgniter

BallastBallast

HID Headlamp device waveform & ARC Image

IGN.Key

Heal LightSwitch

Heal LightBulb Voltage

ON

OFF

ON

OFF

0 volt

85 volt(3A)

20 Kv

400 Hz

Voltage secure Area(AC current)

25 ms 500 ms

HID Lamp Main Feature

ItemsCenter Max. irradiation

width

Max. irradiation

width

Max. irradiation width,(LH/RH)

Low Beam 68 m 90 m 17.1 m

Low Beam(HID Bulb) Main Feature

ItemsCenter Max. irradiation

width

Max. irradiation

width

Max. irradiation width,(LH/RH)

Hi Beam 155 m 165 m 20 m

High Beam(Halogen Bulb) Main Feature

Comparison Feature

Diagnosis

If HID headlamp does not operate, do checking as follows

- Check voltage of the battery(Low beam operates when it is

more than 9volts)

- Check the fuse & relay

- Polarity of power which is supplied to Ballast does check.

- Bulb connector check

- Bulb glass broken check

HID Lighting Circuit

Battery

+ H.I.DBallast

12V

RH

H.I.DBallast

12V

LH

Fuse:15A

LH Head Lamp Relay

Fuse:15A

Bulb

Bulb

RH Head Lamp Relay

◆ There is a high voltage around the HID Igniter while HID Bulb is ON.

so, that the inspection is allowed only while head Lamp Switch is Off.

◆ Do not Head Light Switch On when HID Lamp Igniter Connector

is disconnected.(When the switch is On, 20KV is applied to Igniter)

◆ The HID BULB manufacturer of RH & LH should be same.

Ex : Osram or Philips

◆ Do not fix HID Lighting System by customer when it fails.

Caution items while inspect HID Lighting

AHLSAHLS(Auto Head Light (Auto Head Light Leveling System)Leveling System)

AHLS general

This device is to automatically control the headlamp

projection angle that is variable

due to the vehicle loading condition

AHLS operating Sequence 1

1. Load change the amount of vehicle

2. Angle change of suspension

3. Head lamp angle change requirement calculation

4. Head lamp angle change leveling single send to leveling device

5, Head lamp angle leveling device Actuator operating

Before load detect

Load detect

Head lamp angle leveling deviceactuator operating.

AHLS operating Sequence 2

AHLS composition - AHLS Module

AHLS Module Detects the height of vehicle and optimize the up & down

aiming of head lamp.

Install location

AHLS composition - Auto Leveling Actuator

Auto Leveling Actuator Adjust the aiming angle of head lamp according to the voltage

signal of AHLS control module.

Install location

Ballaster

Auto Leveling Actuator

System INPUTS & OUPUTS

Input / output Block Diagram

IGN. Key(12 volt)

Head Light Switch

Vehicle Height Sensor

Vehicle Speed Sensor

Ground

SI-ECMSI-ECMHID SignalHID Signal

DiagnosticDiagnostic

Leveling Actuator

Leveling Actuator

DLC Connector

DLC Connector

INPUTS

OUTPUTS

AHLS CIRCUIT Diagram

L

S

ALTERNATOR

100A

IGN. Key S/W

4 6

3

2

8

HID Lamp

Head LampRelay

ENG. J/BoxFusible Link

BATT.ECMECM

5

Head Lamp SwitchETsHs1

H/LTailOFF

DLC Connector1

SI-ECM

M68 Connector

E32 Connector

M01-1Connector

15 1

316

AHLSActuator

Height Sensor LeverVehicle

Speed Sensor

BallasterBallaster

Auto Leveling Condition

There two condition, when do auto leveling

according to height change of a car.

⊙ Condition 1

IG. ON & Head Light Switch ON Mode before take

off(Vehicle stop)

⊙ Condition 2

Head Lamp Switch ON Mode after take off(while driving)

AHLS Control Module Reset

★ When : the SI-ECM is replaced or Using Hi-scan.

★ Reset condition

- Vehicle empty condition

- Flat ground & regular tire pressure

★ SI – ECM Output signal Voltage Between SI – ECM &

AHLS Actuator. : 80% voltage of input voltage to

AHLS Control Module.

★ Reset leveling is fixed on vehicle empty condition

HALS Reset

Hi-scan diagnosis - Reset

1. Caution : Select the right model

2. Zero setting value : 80 %

ALHS Reset with Hi-scan

Diagnostic Trouble Code Read

Diagnostic Trouble Code

※Caution : Head lamp switch should be On when conduct self diagnosis

C1522 DTC is shown with just IG. Key On.

Dynamic Type DTC

Diagnostic trouble code description.

DTC DTC ITEM Description

C1604 ECM(Hardware) Error SI - ECM Hardware Error

C1606 ECM(Software) Error SI – ECM Software Error

C1620First Setup Not Completed(Not Adjusted)

ALHS Adjusting Failed(Zero Setting)

C1522 H/Lamp Switch Signal Line Open

Heal Lamp Signal line open Circuit ※ Head Lamp ON/OFF Signal Voltage - Lamp Switch ON : Lower-than 2 Volt - Lamp Switch OFF : Higher-than 6 Volt

C1212 Vehicle Speed Sensor Malfunction

Vehicle Speed Sensor Signal Higher-than 301 Hz ※ MAX. Signal : 300 Hz

C2226Output Voltage Short to battery or GND.(Actuator Control Signal Line)

- ALHS Signal Line Short to BATT. or Short to GND. - When ALHS Signal Line Voltage is beyond the 15~80% of SI-ECM input voltage.

C1255RR Height Sensor Circuit(Overturned SI-ECM Level)

- Overturned error when SI – ECM Lever is beyond 90˚ that is normal operating range.

C1621 Excess operating Temperature

- When the temperature of SI – ECM EEPROM is over 120 for 2 sec.℃

Current Data Read

Current Data

Actuator .. % : SI – ECM Output Voltage Value

MIN : 15 %(60˚), MAX : 80 %(90˚)

Sensor .. DEG. : Rear Height Sensor Angle.

Actuality operation angle : 20˚.

※ Check if the SI-ECM output voltage is 80% of input voltage at vehicle empty condition.

※ The angle of sensor is zero DEG. at vehicle empty condition.

Hi-scan Actuator test

Actuator test

※ Input Set Value : Check if the actuator is operated from 15% to 80%

of input voltage.

※ SET : Return to basic value 80% if press set button while actuator is operated.