No.2 HEADLIGHT AUTO LEVELING SYSTEM DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS ACCORDING TO VEHICLE POSITION [HEADLIGHT AUTO LEVELING SYSTEM]

id0903d0855900

2 | Headlight auto leveling does not adjust optical axis of the headlights for vehicle posture
DESCRIPTION | • 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
POSSIBLE CAUSE | • 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

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 s after? | Yes | Perform the symptom “No.1 Headlight 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 HEADLIGHT 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 headlight auto leveling function does not operate. RH: ― Auto leveling control module terminal AB—front combination light (right-side) terminal F ― Auto leveling control module terminal Z—front combination light (right-side) terminal E ― Auto leveling control module terminal X—front combination light (right-side) terminal D LH: ― Auto leveling control module terminal AA—front combination light (left-side) terminal F ― Auto leveling control module terminal Y—front combination light (left-side) terminal E ― Auto leveling control module terminal W—front combination light (left-side) terminal D • 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. (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) • Does the headlight 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. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
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. RH: ― Headlight auto leveling control module terminal X—front combination light (right-side) terminal D ― Headlight auto leveling control module terminal Z—front combination light (right-side) terminal E LH: ― Headlight auto leveling control module terminal W—front combination light (left-side) terminal D ― Headlight auto leveling control module terminal Y—front combination light (left-side) terminal E • 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 | Repair or replace the malfunctioning part, or install properly.
No | Go to the next step.
7 | INSPECT FRONT AUTO LEVELING SENSOR • Inspect the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR INSPECTION.) • Is the front auto leveling sensor normal? | Yes | Go to the next step.
No | Replace the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
8 | INSPECT REAR AUTO LEVELING SENSOR • Inspect the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR INSPECTION.) • Is the rear auto leveling sensor normal? | Yes | Go to the next step.
No | Replace the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
9 | INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL LINE OR ELSEWHERE • Turn the ignition switch to OFF 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+? | 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 position. • Disconnect auto leveling control module and instrument cluster connectors. • Verify that the continuity for following: ― Headlight auto leveling control module terminal A-GND (normal condition: not continuity) ― Headlight auto leveling control module terminal A-instrument cluster terminal 1O (normal condition: continuity) • Is the conduction state normal? | Yes | Replace the auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No | Repair or replace for open or short circuit.