No.2 AUTO LEVELING DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS FOR VEHICLE POSTURE [HEADLIGHT AUTO LEVELING SYSTEM]
id0903d0899200
2
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Auto leveling does not adjust optical axis of the headlights for vehicle posture
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DESCRIPTION
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• Auto leveling does not adjust optical axis of the headlights for cargo and passenger weight conditions when the vehicle speed above 30 km/h {19 mph}.
• Left or right side auto leveling does not operate.
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POSSIBLE CAUSE
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• 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 R and instrument cluster terminal 2O
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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VERIFY AUTO LEVELING WARNING LIGHT ILLUMINATION
• Switch the ignition to ON.
• Verify that the auto leveling warning light condition.
• Does the auto leveling warning light illuminate 3 s after switching the ignition to ON.
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Yes
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Perform the symptom “No.1 Auto leveling warning light illuminates when the ignition is switched to ON” 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 AUTO LEVELING SENSOR OR ELSEWHERE
• Switch the ignition to off.
• Switch the ignition to ON.
• Turn on the head light in low position.
• Jump the DLC-2 terminal B to GND using a jumper wire.
• Verify that the optical axis movement.
• Does the optical axis move up and down both side?
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Yes
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Go to the next step.
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No
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Go to Step 5.
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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 auto leveling function does not operate.
Right-side:
Left-side:
• 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 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.
Right-side:
Left-side:
• 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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Go to the next step.
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No
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Repair or replace the malfunctioning part, or install properly.
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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
• Switch the ignition to off.
• Disconnect the auto leveling control module connector.
• Switch the ignition to ON.
• Measure the voltage between auto leveling control module harness side connector terminal R 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
• Switch the ignition to off.
• Disconnect auto leveling control module and instrument cluster connectors.
• Verify that the continuity for following:
• Are there continuity.
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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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