Hyundai i-30: Auto Head Lamp Leveling Device / Auto Head Lamp Leveling Unit

Hyundai i30 (PD) 2018-2024 Service Manual / Body Electrical System / Auto Head Lamp Leveling Device / Auto Head Lamp Leveling Unit

Schematic diagrams
Circuit Diagram

Description and operation
Description
According to driving environment and loading state of vehicle, head lamp lighting direction is changed to keep the driver's visibility range and to protect the driver's vision from glare, aiming at safety driving.
Sensor integrated ECU mounting on the rear center arm drives the actuator mounting on the head lamp since sensing the input signal following the vehicle's statically changes.
Head lamp beam is automatically operated by chassis tilt.
Operation
Operating Procedure
1.
Suspension angle change resulted from vehicle's load change.
2.
Sensor angle change.
3.
Microprocessor calculates necessary head lamp angle change amount.
4.
Sending a proper signal to head lamp leveling device and driving actuator.
Operating Condition
1.
Ignition on
2.
Low beam on
3.
On stop : If sensor lever change is 0.3° and above, head lamp is operated after max. 1.5 sec.
4.
On driving : If vehicle velocity is over 4km/h(2.48mile/h), velocity change is not over 0.8-1.6km/h(0.5 - 1.0mile/h) per second, and loading condition is changed, then head lamp is operated.
Components
1.
Auto head lamp leveling unit
1. Leveling unit & sensor
2. Sensor mounting bracket
3. Sensor linkage

Using a Micro-processor, percept the operation lever's mechanical angle change or speed signal.
As an actuator control device of inner control program, mounting on the rear center arm.
Repair procedures
Inspection
1.
Ignition "ON".
2.
Turn on the head lamp switch.
3.
Check that the aim of the head lamp changes smoothly when the head lamp leveling device switch is turned on.
4.
If it does not operate well, check the connector and terminals to make sure that they are connected.
If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
If the terminal is in good condition, move to the step 5.
5.
Replace the head lamp assembly and check for proper operation.
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Disconnect the head lamp leveling unit connector (A).
3.
Remove the head lamp leveling unit (B) after loosening the mounting bolts and nut.

Installation
1.
Install the head lamp leveling unit.
2.
Reconnect the head lamp leveling unit connector.
Troubleshooting
Inspection with GDS
Initialization and diagnosis sequence by using GDS equipment.
The following is the summarized A/S procedure.
No.
Procedure
1
Park the vehicle on level ground.
2
Tire check
3
IGN1 ON
4
Head lamp Low Beam ON
5
Connection with diagnostic tool
6
Initial command by diagnostic tool
7
Clear DTC Code
8
IGN1 OFF → ON
9
Re- Connection with diagnostic tool
10
Checking of HLLD output value as 15% and DTC Code
11
HLLD actuating by diagnostic tool command
12
Head lamp mechanical Initial Aiming

  
1)
Empty the vehicle of all the load and park it on level ground.
2)
Check the HLLD output value (15%) after initial setting.
3)
After the electrical initial setting with a diagnostic tool, perform the mechanical aiming.
1.
Select the vehicle model and "Auto Head Lamp Leveling System (AHLS)"
2.
Check the sensor output value and data of each item on the system information screen.

3.
To perform functional test on AHLS outputs, select "Actuation Test".

4.
Select " Parameter setting & Zero position Initial".

5.
Confirm that AHLS operate forcefully in "Head lamp leveling" menu.

6.
To check the DTC of the head lamp leveling system, select "Diagnostic trouble codes"

    Components and components location

    Component Location 1. Head lamp leveling switch (Manual type only) 2. Head lamp leveling unit (Auto type only) 3...

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