NO.1 AUTO LEVELING DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS FOR VEHICLE POSTURE

id0903d0899700

1

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

POSSIBLE CAUSE

• Headlight auto leveling actuator the malfunction
• Auto leveling control module (main and/or sub) the malfunction
• Front auto leveling sensor malfunction
• Rear auto leveling sensor malfunction
• Improper installation of front auto leveling sensor
• Improper installation of rear auto leveling sensor
• Open or short circuit in wiring harness between front combination light (LH and RH)
• Poor connection or damaged pin at connection between front combination light (LH) and auto leveling control module (main)
• Poor connection or damaged pin at connection between front combination light (RH) and auto leveling control module (sub)
• Open or short circuit in wiring harness between ABS/TCS HU/CM terminal V and front combination light (LH) terminal 1E (with ABS/TCS)
• Open or short circuit in wiring harness between DSC HU/CM terminal AE and front combination light (LH) terminal 1E (with DSC)
• Short circuit in wiring harness between ABS/TCS HU/CM terminal V and BCM terminal 9B

Diagnostic procedure

STEP

INSPECTION

ACTION

1
RETRIEVE DTC FOR HEADLIGHT AUTO LEVELING SYSTEM
• Connect the WDS or equivalent to DLC-2.
• Tern the ignition switch to ON position (engine off).
• Retrieve the DTCs for headlight auto leveling system.
• Is there any DTC displayed?
Yes
Perform the appropriate DTC troubleshooting procedure.
No
Go to the next step.
2
INSPECT IF MALFUNCTION IS IN AUTO LEVELING SENSOR OR ELSEWHERE
• Is the malfunction appears both side?
Yes
Go to Step 8.
No
If headlight auto leveling (RH) function does not operate, go to the next step.
If headlight auto leveling (LH) function does not operate, go to Step 6.
3
INSPECT COMBINATION LIGHT (RH) CONNECTOR FOR POOR CONNECTION
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion) at connection between front combination light (RH) and auto leveling control module (sub).
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning part.
4
INSPECT IF MALFUNCTION IS IN COMMUNICATION LINE FOR HEAD LIGHT CONTROL MODULES OR ELSEWHERE
• Inspect for open or short circuit in following wiring harnesses between front combination light (LH and RH) terminal.
- Front combination light (LH) terminal 1F-front combination light (RH) terminal 1F
- Front combination light (LH) terminal 1H- front combination light (RH) terminal 1H
• Are the harnesses normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning part.
5
INSPECT IF MALFUNCTION IS IN HEADLIGHT AUTO LEVELING ACTUATOR OR ELSEWHERE
• Replace the front combination light (RH).
• Verify that the headlight auto leveling (RH) function.
• Does the headlight auto leveling (RH) function normal?
Yes
Troubleshooting completed.
(Malfunction is in headlight auto leveling actuator.)
No
Replace the auto leveling control module (sub).
Note
• The auto leveling control module (sub) is integrated with the discharge headlight control module (RH).
6
INSPECT FRONT COMBINATION LIGHT (LH) CONNECTOR FOR POOR CONNECTION
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion) at connection between front combination light (LH) and auto leveling control module (main).
• Is the connection normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning part.
7
INSPECT IF MALFUNCTION IS IN HEADLIGHT AUTO LEVELING ACTUATOR OR ELSEWHERE
• Replace the front combination light (LH).
• Verify that the headlight auto leveling (LH) function.
• Does the headlight auto leveling (LH) function normal?
Yes
Troubleshooting completed.
(Malfunction is in headlight auto leveling actuator.)
No
Replace the auto leveling control module (main).
Note
• The auto leveling control module (main) is integrated with the discharge headlight control module (LH).
8
INSPECT AUTO LEVELING SENSOR INSTALLATION
• Inspect front and rear auto leveling sensor installation (bend or damaged of bracket, or dislocated link).
• Are the front and rear auto leveling sensor installation properly?
Yes
Go to the next step.
No
Repair or replace malfunctioning part, or install properly.
9
INSPECT IF MALFUNCTION IS IN FRONT AND REAR AUTO LEVELING SENSOR RELATED CIRCUIT OR ELSEWHERE
• Inspect for open or short circuit in following wiring harnesses:
- Front auto leveling sensor terminal A- front combination light (LH) terminal 2B
- Front auto leveling sensor terminal B- front combination light (LH) terminal 2C
- Front auto leveling sensor terminal D- front combination light (LH) terminal 2A
- Rear auto leveling sensor terminal A- front combination light (LH) terminal 2B
- Rear auto leveling sensor terminal B- front combination light (LH) terminal 2D
- Rear auto leveling sensor terminal D- front combination light (LH) terminal 2A
• Are the harnesses normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning part.
10
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.
11
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.
12
INSPECT IF MALFUNCTION IS IN VEHICLE SPEED RELATED SIGNAL CIRCUIT OR ELSEWHERE
• Inspect for following wiring harnesses:
- Open or short circuit in wiring between front combination light (LH) terminal 1E and ABS/TCS HU/CM terminal V (with ABS/TCS)
- Open or short circuit in wiring between front combination light (LH) terminal 1E and DSC HU/CM terminal AE (with DSC)
- Short to GND or power supply circuit in wiring between front combination light (LH) terminal 1E and BCM terminal 9B
• Are the harnesses normal?
Yes
Replace the auto leveling control module (main).
No
Repair or replace malfunctioning part.