No. 1 AUTO LEVELING WARNING LIGHT ILLUMINATES WHEN THE IGNITION SWITCH TURNED TO ON POSITION [HEADLIGHT AUTO LEVELING SYSTEM]
| 1 | Auto leveling warning light illuminates when the ignition switch turned to ON position |
|---|---|
| POSSIBLE CAUSE | Headlight auto leveling function related electrical part malfunction Auto leveling sensor related part malfunction Auto leveling control module power supply voltage excessive low Auto leveling sensor signal voltage excessive high or low Front auto leveling sensor malfunction Rear auto leveling sensor malfunction Auto leveling control module malfunction Auto leveling control module power supply voltage is excessive high Vehicle speed signal is above 180 km/h or more . Instrument cluster malfunction Short to power supply circuit between ABS HU/CM terminal V and auto leveling control module terminal R (with ABS) Short to power supply circuit between DSC HU/CM terminal T and auto leveling control module terminal R (with DSC) Auto leveling warning light control circuit malfunction Instrument cluster malfunction Short to GND between instrument cluster terminal 2J and auto leveling control module terminal V |
AUTO LEVELING WARNING LIGHT ILLUMINATES - POSSIBLE CAUSE
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
| 1 | VERIFY THAT THE FRONT AND REAR AUTO LEVELING SENSOR INSTALLATION Verify that the front and rear auto leveling sensor installation. Is there any bend, damage or dislocated link at the bracket? | Yes | Repair or replace malfunctioning part. |
| No | Go to the next step. | ||
| 2 | INSPECT AUTO LEVELING CONTROL MODULE POWER SUPPLY VOLTAGE Turn the ignition switch to ON position. Measure the voltage between auto leveling control module terminals H and GND. Is the voltage B+ ? | Yes | Go to the next step. |
| No | Repair or replace for open circuit between the auto leveling control module terminal H and the ignition switch. | ||
| 3 | INSPECT AUTO LEVELING CONTROL MODULE GND CIRCUIT FOR OPEN Turn the ignition switch to OFF. Disconnect the auto leveling control module connector. Verify that continuity between auto leveling control module terminal F and GND. Is there continuity? | Yes | Connect the auto leveling control module connector, then go to Step 5. |
| No | Go to the next step. | ||
| 4 | INSPECT GND POINT Verify that the GND point for auto leveling control module. Is there loose or poor connection at GND point? | Yes | Retighten the GND point. |
| No | Repair or replace for open circuit between auto leveling control module terminal F and GND. | ||
| 5 | INSPECT IF MALFUNCTION IS IN AUTO LEVELING SENSOR OR ELSEWHERE Turn the ignition switch to ON position Turn the headlight to ON. Measure voltage between auto leveling control module terminal G and GND Is the voltage 0.25-4.75 V ? | Yes | Go to the next step. |
| No | Go to Step 9. | ||
| 6 | INSPECT IF MALFUNCTION IS IN REAR AUTO LEVELING SENSOR OR ELSEWHERE Turn the ignition switch to ON position. Turn the headlight to ON. Measure voltage between auto leveling control module terminal E and GND. Is the voltage 0.25-4.75 V ? | Yes | Go to Step 11. |
| No | Go to the next step. | ||
| 7 | INSPECT REAR AUTO LEVELING SENSOR SIGNAL CIRCUIT Inspect the wiring harness between rear auto leveling control module terminal E and auto leveling sensor terminal C. Is there open or short circuit detected? | Yes | Repair or replace for open or short circuit. |
| No | Go to the next step. | ||
| 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 | Repair or replace for open circuit at following. Between auto leveling control module terminal M and rear auto leveling sensor terminal A Between auto leveling control module terminal D and rear auto leveling sensor terminal C |
| No | Replace the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR REMOVAL/INSTALLATION .) | ||
| 9 | INSPECT IF MALFUNCTION IS IN AUTO LEVELING SENSOR POWER OR GND CIRCUIT OR ELSEWHERE Turn the ignition switch to ON position. Turn the headlight to ON. Measure voltage between auto leveling control module terminal E and GND. Is the voltage 0.25-4.75 V ? | Yes | Go to the next step. |
| No | Repair or replace for open circuit at following. Between auto leveling control module terminal M and front auto leveling sensor terminal A Between auto leveling control module terminal M and rear auto leveling sensor terminal A Between auto leveling control module terminal D and front auto leveling sensor terminal D Between auto leveling control module terminal D and rear auto leveling sensor terminal D | ||
| 10 | INSPECT FRONT AUTO LEVELING SENSOR SIGNAL CIRCUIT Inspect the wiring harness between front auto leveling control module terminal E and auto leveling sensor terminal C. Is there open or short circuit detected? | Yes | Repair or replace for open or short circuit. |
| No | Inspect the front auto leveling sensor. If not normal, replace the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR INSPECTION .) | ||
| 11 | INSPECT IF MALFUNCTION IS IN AUTO LEVELING WARNING LIGHT CONTROL CIRCUIT OR ELSEWHERE Turn the ignition switch to OFF. Disconnect the auto leveling control module and instrument cluster connectors. Verify continuity between auto leveling control module terminal E and GND. Is there continuity? | Yes | Repair or replace for short to GND. |
| No | Go to the next step. | ||
| 12 | INSPECT INSTRUMENT CLUSTER Inspect the auto leveling warning light using the instrument cluster input/output check mode. (See INSTRUMENT CLUSTER INSPECTION .) Is the check result normal? | Yes | Go to the next step. |
| No | Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .) | ||
| 13 | INSPECT IF MALFUNCTION IS IN VEHICLE SPEED SIGNAL CIRCUIT OR ELSEWHERE Turn the ignition switch to OFF. Disconnect the auto leveling control module connector. Turn the ignition switch to ON. Measure the voltage between auto leveling control module terminal R and GND. Is the voltage B+ ? | Yes | Repair or replace for short to power supply. |
| No | Replace the auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION .) | ||
AUTO LEVELING WARNING LIGHT ILLUMINATES - DIAGNOSTIC PROCEDURE