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

id0903d0010800

1
Headlight auto leveling malfunction indicator light illuminates when the ignition is switched to ON
DESCRIPTION
•  The headlight auto leveling malfunction indicator light flashes when the ignition is switched ON.
•  The headlight auto leveling malfunction indicator light illuminates when the ignition is switched ON.
POSSIBLE CAUSE
•  Headlight auto leveling function related electrical part malfunction
―  Auto leveling sensor related part malfunction (DTC is detected)
•  Output signal excessively high or low
•  Auto leveling sensor malfunction
―  Auto leveling control module malfunction
―  Auto leveling control module power supply voltage excessively high
•  headlight auto leveling malfunction indicator light illumination circuit malfunction
―  Instrument cluster malfunction
―  Communication error between auto leveling control module and Instrument cluster

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY DTCs
•  Retrieve DTCs from the auto leveling control module.
•   Is there any DTC present?
Yes
Go to applicable DTC troubleshooting procedure.
(See DTC TABLE [HEADLIGHT AUTO LEVELING SYSTEM].)
No
Go to the next step.
2
INSPECT AUTO LEVELING SENSOR INSTALLATION
•  Inspect the auto leveling sensor installation.
•  Is there any bending, damage or dislocated links at the bracket?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
3
INSPECT AUTO LEVELING CONTROL MODULE POWER SUPPLY VOLTAGE
•  Switch the ignition to ON.
•  Measure the voltage between auto leveling control module terminals H and ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect and repair or replace the malfunctioning part for an open circuit between the ignition switch (push start) and auto leveling control module terminals H.
4
INSPECT AUTO LEVELING CONTROL MODULE GROUND CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to off.
•  Disconnect the auto leveling control module connector.
•  Verify the continuity between the auto leveling control module wiring harness-side connector terminal F and ground.
•  Is there continuity?
Yes
Connect the auto leveling control module connector, then go to the next step.
No
Inspect and repair for a loose or poor connection in the auto leveling control module ground point.
5
INSPECT IF MALFUNCTION IS IN AUTO LEVELING SENSOR OR ELSEWHERE
•  Turn the headlights on.
•  Measure the voltage between auto leveling control module terminal E and ground.
•  Is the voltage 0.4—4.6V?
Yes
Go to Step 7.
No
Go to the next step.
6
INSPECT AUTO LEVELING SENSOR SIGNAL RELATED CIRCUIT
•  Inspect for an open or short circuit in the wiring harness between auto leveling control module terminal E and auto leveling sensor terminal B.
•  Is an open or short circuit detected?
Yes
Repair or replace the malfunctioning part for an open or short circuit.
No
Go to the next step.
7
INSPECT AUTO LEVELING SENSOR
•  Inspect the auto leveling sensor.
•  Is the auto leveling sensor normal?
Yes
Repair or replace the malfunctioning part for an open circuit in the following:
•  Between auto leveling control module terminal M and auto leveling sensor terminal C
•  Between auto leveling control module terminal D and auto leveling sensor terminal A
No
Replace the auto leveling sensor.
(See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
8
INSPECT IF MALFUNCTION IS IN COMMUNICATION BETWEEN AUTO LEVELING CONTROL MODULE AND INSTRUMENT CLUSTER OR ELSEWHERE
•  Retrieve the DTCs for the instrument cluster using the M-MDS.
•  Are the following DTCs displayed?
―  U0001:88, U0182:00
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
9
INSPECT IF MALFUNCTION IS IN INSTRUMENT CLUSTER OR AUTO LEVELING CONTROL MODULE
•  Inspect the instrument cluster.
•  Is the instrument cluster normal?
Yes
Replace the auto leveling control module.
(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)