Automatic Headlamp Leveling Unit Repair Procedures

Removal

Height sensor

1. 1
   Disconnect the height sensor connector (A).

   

2. 2
   Loosen the mounting bolts (body: 2 pcs, chassis: 1 pc) on the height sensor bracket.

   Tightening torque: 3 ~ 5 N·m

   

3. 3
   Remove the height sensor.
4. 4
   Remove the headlamp assembly.

HLLD (Headlamp Leveling Device) Actuator

Installation

Height sensor

1. 1
   Install the height sensor.
2. 2
   Connect the connector.
3. 3
   Install the headlamp assembly.

HLLD (Headlamp Leveling Device) Actuator

Inspection Using GDS

Initialization and diagnostic procedure using GDS equipment. The following is a summary of the A/S procedure using GDS.

No.	Procedure
1	Position the vehicle on a level surface.
2	Check tires.
3	IGN1 ON.
4	Low beam headlamps on.
5	Communication with Diagnostic Tool
6	Initial command from diagnostic tool
7	Clear trouble code
8	IGN1 OFF → ON
9	Reconnect to diagnostic tool
10	Check HLLD output value as 15% and DTC
11	Operate the leveling device by diagnostic tool command
12	Headlamp Mechanical Initial Aiming

1. 1
   Select the vehicle model and "Headlamp Adjustment".

   

2. 2
   GDS can forcibly operate actuators, monitor input/output values and perform self-diagnosis.

   

3. 3
   For the AHLS output function test, select "Actuation Test".

   

4. 4
   Select "Parameter Setting and Zero Initial Position".

   

   

5. 5
   Make sure the AHLS system is forcibly operated in the "Headlamp Leveling" menu.

   

   

   

6. 6
   To check the headlamp leveling system trouble codes, select "Diagnostic Trouble Codes".