Hyundai Sonata LF Quiz
Body Electrical System

Automatic Headlamp Leveling Device Troubleshooting

In this manual: Body Electrical System
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
9steps
~54min
2/5difficulty
Done 0 of 9

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. The vehicle is unladen and must be parked on a level surface.
  2. Check the HLLD output value (15%) after the initial adjustment.
  3. Perform the initial electrical adjustment using the diagnostic tool first, and then the mechanical adjustment.
  1. Select the vehicle model and "Automatic Headlamp Leveling System (AHLS)".
  2. GDS can forcibly operate actuators, monitor input/output values and perform self-diagnosis.
  3. For the AHLS output function test, select "Actuation Test".
  4. Select "Parameter Setting and Zero Initial Position".
  5. Make sure the AHLS system is forced to operate in the "Headlamp Aiming" menu.
  6. To check the headlamp leveling system trouble codes, select "Diagnostic Trouble Codes".

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A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.