No.2 HEADLIGHT AUTO LEVELING SYSTEM DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS ACCORDING TO VEHICLE POSITION [HEADLIGHT AUTO LEVELING SYSTEM]
id0903d0855900
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2
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Headlight auto leveling does not adjust optical axis of the headlights for vehicle posture
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DESCRIPTION
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• Headlight auto leveling does not adjust optical axis of the headlights for cargo and passenger weight conditions when the vehicle speed above 30 km/h {18.6 mph}
• Left or right side headlight auto leveling does not operate
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POSSIBLE CAUSE
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• Headlight leveling actuator the malfunction
• Headlight auto leveling control module the malfunction
• Front and/or rear leveling sensor the malfunction
• Improper installation of front and/or rear headlight auto leveling sensor
• Open or short circuit in wiring between headlight auto leveling control module terminal A and instrument cluster terminal 1O
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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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 s after?
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Yes
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Perform the symptom “No.1 Headlight auto leveling warning light illuminates when the ignition switch to ON position” troubleshooting procedure.
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No
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Go to the next step.
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2
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INSPECT IF THE MALFUNCTION IS IN HEADLIGHT AUTO LEVELING SENSOR OR ELSEWHERE
• Is the malfunction appeared both side?
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Yes
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Go to Step 5.
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No
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Go to the next step.
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3
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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 headlight auto leveling function does not operate.
RH:
LH:
• Is open or short circuit detected?
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Yes
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Repair or replace for open or short circuit.
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No
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Go to the next step.
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4
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INSPECT IF THE MALFUNCTION IS IN HEADLIGHT LEVELING ACTUATOR OR ELSEWHERE
• Replace the suspected side front combination light.
• Does the headlight auto leveling adjust optical axis of the headlight for vehicle posture?
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Yes
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Troubleshooting completed.
(The malfunction is in headlight leveling actuator.)
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No
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Replace the auto leveling control module.
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5
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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.
RH:
LH:
• Is open or short circuit detected?
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Yes
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Repair or replace for open or short circuit.
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No
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Go to the next step.
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6
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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?
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Yes
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Repair or replace the malfunctioning part, or install properly.
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No
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Go to the next step.
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7
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INSPECT FRONT AUTO LEVELING SENSOR
• Inspect the front auto leveling sensor.
• Is the front auto leveling sensor normal?
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Yes
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Go to the next step.
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No
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Replace the front auto leveling sensor.
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8
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INSPECT REAR AUTO LEVELING SENSOR
• Inspect the rear auto leveling sensor.
• Is the rear auto leveling sensor normal?
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Yes
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Go to the next step.
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No
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Replace the rear auto leveling sensor.
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9
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INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL LINE OR ELSEWHERE
• Turn the ignition switch to LOCK position.
• 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 A and GND.
• Is the voltage B+?
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Yes
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Repair or replace for short to power supply.
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No
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Go to the next step.
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10
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INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL LINE OR ELSEWHERE
• Turn the ignition switch to LOCK position.
• Disconnect auto leveling control module and instrument cluster connectors.
• Verify that the continuity for following:
• Is the conduction state normal?
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Yes
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Replace the auto leveling control module.
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No
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Repair or replace for open or short circuit.
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