Auto Head Lamp Leveling Device Hyundai Santa Fe III

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Inspection with GDS

Initialization and diagnosis sequence by using GDS equipment.

Below content summarize the procedure for A/S using GDS.

Note. There's no load in vehicle and vehicle should be on flat plane. Should check of HLLD output value (15%) after initial setting. Should do first electrical initial setting by diagnostic tool and then mechanical aiming afterward.

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1. Select the vehicle model and "Head lamp leveling".
2. GDS can operates actuator forcefully, input/output value monitoring and self diagnosis.
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"

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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.

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.

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1. Auto head lamp leveling unit Leveling unit & sensor Sensor mounting bracket 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. Actuator Change the head lamp lighting direction up or down since automatic head lamp leveling unit sensing the input signal following the vehicle's statically changes.

Inspection

1. Ignition "ON".
2. Turn on the head lamp switch.
3. Check for operation. If the aim of the head lamps changes smoothly when the head lamp leveling switch is turned.
4. If the operation does not work well, inspect the connector and terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 5.
5. Substitute with a known-good head lamp assembly and check for proper operation.

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1. Remove the head lamp leveling unit connector (A).
2. Loosen the mounting bolts (2EA) of automatic head lamp leveling unit (B). Tightening torque: 3.9 ~ 5.9 N.m (0.4 ~ 0.6 kgf.m, 2.9 ~ 4.3 lbf-ft)
3. Remove the head lamp leveling unit assembly.

Installation

1. Install the head lamp leveling unit.
2. Reconnect the head lamp leveling unit connector.