No.2 AUTO LEVELING DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS FOR VEHICLE POSTURE [HEADLIGHT AUTO LEVELING SYSTEM]
id0903d0899200
|
2
|
Auto leveling does not adjust optical axis of the headlights for vehicle posture
|
|
DESCRIPTION
|
• 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.
|
|
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 R and instrument cluster terminal 2O
|
Diagnostic procedure
|
STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
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.
|
Yes
|
Perform the symptom “No.1 Auto leveling warning light illuminates when the ignition is switched to ON” troubleshooting procedure.
|
|
No
|
Go to the next step.
|
||
|
2
|
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?
|
Yes
|
Go to the next step.
|
|
No
|
Go to Step 5.
|
||
|
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:
Left-side:
• 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:
Left-side:
• 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
• 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+?
|
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
• Switch the ignition to off.
• Disconnect auto leveling control module and instrument cluster connectors.
• Verify that the continuity for following:
• Are there continuity.
|
Yes
|
Replace the auto leveling control module.
|
|
No
|
Repair or replace for open or short circuit.
|
||