No.1 AUTO LEVELING WARNING LIGHT ILLUMINATES WHEN THE IGNITION IS SWITCHED TO ON [HEADLIGHT AUTO LEVELING SYSTEM]

id0903d0913700

1
Auto leveling warning light illuminates when the ignition is switched to ON
DESCRIPTION
The auto leveling warning light remains illuminated 3 seconds or more after the ignition is turned to ON.
POSSIBLE CAUSE
•  Headlight auto leveling function related electrical part the malfunction
―  Front auto leveling sensor related part the malfunction (With front auto leveling sensor) (DTC 4 (front auto leveling sensor))
•  Front auto leveling sensor power supply voltage excessive low
•  Front auto leveling sensor signal voltage excessive high or low
•  Front auto leveling sensor the malfunction
―  Rear auto leveling sensor related part the malfunction (DTC 3 (rear auto leveling sensor))
•  Rear auto leveling sensor power supply voltage excessive low
•  Rear auto leveling sensor signal voltage excessive high or low
•  Rear auto leveling sensor the malfunction
―  Auto leveling control module the malfunction
―  Auto leveling control module does not operate
•  Auto leveling control module power supply circuit malfunction
•  Auto leveling control module GND circuit malfunction
―  Auto leveling control module power supply voltage is excessive high
•  Auto leveling warning light control circuit the malfunction
―  Instrument cluster the malfunction
•  CAN signal wiring harness malfunction (does not receive vehicle speed signal)

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM HEADLIGHT AUTO LEVELING SYSTEM DTC
•  Retrieve the headlight auto leveling system DTCs.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [HEADLIGHT AUTO LEVELING SYSTEM].)
No
Go to the next step.
2
INSPECT AUTO LEVELING CONTROL MODULE POWER SUPPLY VOLTAGE
•  Switch the ignition to ON.
•  Measure the voltage between auto leveling control module terminal H and GND.
•  Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace for open circuit between the ignition switch and auto leveling control module terminal H.
3
INSPECT AUTO LEVELING CONTROL MODULE GND CIRCUIT FOR OPEN
•  Switch the ignition 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
Connector 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 CAUSE IS INSTRUMENT CLUSTER OR ELSEWHERE
•  Turn on and off all the indicator lights and warning lights in the instrument cluster using the M-MDS simulation function WL+IL.
•  Does the auto leveling warning light turn on and off according to simulation function?
Yes
Go to the next step.
No
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
6
VERIFY IF MALFUNCTION IS NO VEHICLE SPEED SIGNAL OR ELSEWHERE
•  Verify that the speedometer indication.
•  Does the speedometer indicate properly?
Yes
Go to the next step.
No
Perform the instrument cluster symptom troubleshooting “No.7 Speedometer indication is defective” procedure.
(See NO. 7 SPEEDOMETER INDICATION IS DEFECTIVE [INSTRUMENT CLUSTER].)
7
VERIFY IF MALFUNCTION IS CAN COMMUNICATION OR AUTO LEVELING CONTROL MODULE
•  Inspect the DTC for the instrument cluster ON-BOARD DIACNOSTIC SYSTEM.
•  Have any CAN communication related DTCs been recorded in memory?
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER].)
No
Replace the auto leveling control module.
(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)