NO.2 AUTO LEVELING DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS FOR VEHICLE POSTURE

id0903d0930000

2

Auto leveling does not adjust optical axis of the headlights for vehicle posture

POSSIBLE CAUSE

• Headlight leveling actuator the malfunction
• Auto leveling control module the malfunction
• Front and/or rear leveling sensor the malfunction
• Improper installation of front and/or rear auto leveling sensor
• Open or short circuit in wiring between auto leveling control module terminal W and instrument cluster terminal 2O

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY AUTO LEVELING WARNING LIGHT ILLUMINATION
• Turn the ignition switch to ON position.
• Verify that the auto leveling warning light condition.
• Does the auto leveling warning light illuminate from turning the ignition switch to ON 3 seconds after?
Yes
Perform the symptom "No.1 Auto leveling warning light illuminates when the ignition switch to ON position" troubleshooting procedure.
No
Go to the next step.
2
INSPECT IF THE MALFUNCTION IS IN AUTO LEVELING SENSOR OR ELSEWHERE
• Is the malfunction appeared both side?
Yes
Go to Step 5.
No
Go to the next step.
3
INSPECT IF THE MALFUNCTION IS IN WIRING HARNESS BETWEEN AUTO LEVELING CONTROL MODULE AND HEADLIGHT LEVELING ACTUATOR
• Inspect for open or short circuit in wiring harness at auto leveling function does not operate.
Right-side:
- Auto leveling control module terminal E-front combination light (right-side) terminal G
- Auto leveling control module terminal B-front combination light (right-side) terminal F
- Auto leveling control module terminal T-front combination light (right-side) terminal H
Left-side:
- Auto leveling control module terminal G-front combination light (left-side) terminal G
- Auto leveling control module terminal B-front combination light (left-side) terminal F
- Auto leveling control module terminal T-front combination light (left-side) terminal H
• Is open or short circuit detected?
Yes
Repair or replace for open or short circuit.
No
Go to the next step.
4
INSPECT IF THE MALFUNCTION IS IN HEADLIGHT LEVELING ACTUATOR OR ELSEWHERE
• Replace the suspected side front combination light.
• Does the auto leveling adjust optical axis of the headlight for vehicle posture?
Yes
Troubleshooting completed.
(The malfunction is in headlight leveling actuator.)
No
Replace the auto leveling control module.
5
INSPECT IF THE MALFUNCTION IS IN WIRING HARNESS BETWEEN AUTO LEVELING CONTROL MODULE AND HEADLIGHT LEVELING ACTUATOR
• Inspect for open or short circuit in wiring harness.
Right-side:
- Auto leveling control module terminal E-front combination light (right-side) terminal G
- Auto leveling control module terminal B-front combination light (right-side) terminal F
Left-side:
- Auto leveling control module terminal G-front combination light (left-side) terminal G
- Auto leveling control module terminal B-front combination light (left-side) terminal F
• Is open or short circuit detected?
Yes
Repair or replace for open or short circuit.
No
Go to the next step.
6
INSPECT FRONT AND REAR AUTO LEVELING SENSOR INSTALLATION
• Inspect front and rear auto leveling sensor installation (bend or damaged of bracket, or dislocated link).
• Are front and rear auto leveling sensor installed properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part, or install properly.
7
INSPECT FRONT AUTO LEVELING SENSOR
• Inspect the front auto leveling sensor.
• Is the front auto leveling sensor normal?
Yes
Go to the next step.
No
Replace the front auto leveling sensor.
8
INSPECT REAR AUTO LEVELING SENSOR
• Inspect the rear auto leveling sensor.
• Is the rear auto leveling sensor normal?
Yes
Go to the next step.
No
Replace the rear auto leveling sensor.
9
INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL LINE OR ELSEWHERE
• Turn the ignition switch to OFF.
• Disconnect the auto leveling control module connector.
• Turn the ignition switch to ON position.
• Measure the voltage between auto leveling control module harness side connector terminal W and GND.
• Is the voltage B+?
Yes
Repair or replace for short to power supply.
No
Go to the next step.
10
INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL LINE OR ELSEWHERE
• Turn the ignition switch to OFF.
• Disconnect auto leveling control module and instrument cluster connectors.
• Verify that the continuity for following:
- Auto leveling control module terminal W-GND (normal condition: not continuity)
- Auto leveling control module terminal W-instrument cluster terminal 2O (normal condition: continuity)
• Are there continuity.
Yes
Replace the auto leveling control module.
No
Repair or replace for open or short circuit.