Kia Cadenza YG: Head lamp leveling Device / Auto Head lamp leveling Unit Description and Operation

Kia Cadenza YG 2016-2021 Service Manual / Body Electrical System / Head lamp leveling Device / Auto Head lamp leveling Unit 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 mounting on the rear center arm drives the actuator mounting on the head lamp since sensing the input signal following the vehicle''s statical changes.
Head lamp beam is automatically operated by chassis tilt.
Purpose of AHLS(Auto Headlamp Leveling System)
•
Compensation of headlamp visual range for changes in vehicle load.
•
Preventing oncoming traffic being blinded by excessive glare.
•
Meeting regulation
Operation
Operating Procedure
1.
Suspension angle change resulted from vehicle''s load change.
2.
Height sensor signal change
3.
Calculation of HLLD signal by AHLS ECU algorithm.
4.
Sending a proper signal to HLLD (head lamp levelling device) and driving actuator.
5.
Actuation of HLLD and compensation of headlamp beam range.
Operating Condition
•
IGN1 ON & Head lamp low bean ON
•
Sensor angle changed over 1° and keeping 10~12seconds with vehicle standing.
•
Sensor angle changed over 1° and keeping 10~12seconds and when vehicle runs over 20km/h with constant speed.
•
Leveling control is off after controlling HLLD for few seconds.
•
To eliminate mechanical tolerance, the lamp position is always reached from the lower side.
System characteristics
1.
Height sensor and link.
No.
Components
1
Sensor mounting bracket
2
Height sensor and link
3
Link bracket

•
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.
2.
HLLD (head lamp leveling device) actuator.

•
Change the head lamp lighting direction up or down since automatic head lamp levelling unit sensing the input signal following the vehicle''s statical changes.

    Circuit Diagram

    Removal Height Sensor 1. Remove the height sensor connector (A). 2. Loosen the mounting bolts(Body: 2EA, chassis: 1EA) from height sensor bracket.

    Other information:

    Kia Cadenza YG 2016-2021 Service Manual: Parking Assist Sensor Repair procedures

    Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the rear bumper cover. (Refer to Body - "Rear Bumper Cover") 3. Disconnect the connector (A) from the parking assist sensor. 4. Pull out the sensor (A) by opening the sensor holder (B) out.

    Kia Cadenza YG 2016-2021 Service Manual: A/C Pressure Transducer Description and Operation

    Description A/C pressure transducer convert the pressure value of high pressure line into voltage value after measure it. By converted voltage value, engine ECU controls cooling fan by operating it high speed or low speed. Engine ECU stop the operation of compressor when the temperature of refrigerant line is so high or so low irregularl

    Categories

     
    Copyright © 2026 www.kcadenzavg.com - 0.0289