THE HEADLIGHT AUTO LEVELING SYSTEM DOES NOT OPERATE IN RESPONSE TO VEHICLE POSTURE [HEADLIGHT AUTO LEVELING SYSTEM]

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Note
•  If there is any vehicle malfunction complaint lodged by a customer, first perform malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [HEADLIGHT AUTO LEVELING SYSTEM].)

Without Adaptive LED Headlights Control Module

Item
THE HEADLIGHT AUTO LEVELING SYSTEM DOES NOT OPERATE IN RESPONSE TO VEHICLE POSTURE
Description
•  The headlight auto-leveling system does operate in response to the number of occupants, cargo load in luggage compartment, and the fuel level.
•  One side of the headlight leveling actuator does not operate.
Possible Causes
•  Short or open circuit in the wiring harness between headlight leveling actuator and auto leveling control module
?  Auto leveling control module terminal P—Headlight leveling actuator (LH/RH) terminal I
?  Auto leveling control module terminal O—Headlight leveling actuator (LH/RH) terminal M
?  Auto leveling control module terminal M—Headlight leveling actuator (LH/RH) terminal L
•  Headlight leveling actuator malfunction
•  Auto leveling control module malfunction
•  Poor installation of the auto leveling sensor (with auto leveling sensor)
•  Auto leveling sensor malfunction (with auto leveling sensor)

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE IF MALFUNCTIONING LOCATION IS AUTO-LEVELING SENSOR
•  Verify the malfunction symptom.
•  Do both sides of the headlight auto leveling system not operate?
Yes
Go to Step 5.
No
Go to the next step.
2
LEVELING OPERATION SIGNAL INSPECTION
•  Verify the headlight leveling actuator operation using the M-MDS.
•  Is the headlight leveling actuator normal?
Yes
Go to Step 6.
No
Go to the next step.
3
LEVELING OPERATION SIGNAL CIRCUIT INSPECTION
•  Inspect wiring harness between Auto leveling control module on the side of the auto leveling system which does not operate and the headlight leveling actuator.
?  Auto leveling control module terminal O and headlight leveling actuator (LH/RH) terminal M
•  Is there any open or short circuit in the wiring harness?
Yes
•  Refer to the wiring diagram and verify whether or not there is a common connector between Auto leveling control module terminal O and headlight leveling actuator (LH/RH) terminal M.
If there is a common connector:
?  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.
?  Repair or replace the malfunctioning part.
If there is no common connector:
?  Repair or replace the wiring harness which has an open or short circuit.
No
Go to the next step.
4
HEADLIGHT LEVELING INSPECTION
•  Replace the front combination light on the side of the auto-leveling system that is not operating.
•  Does the auto-leveling system operate correctly?
Yes
Troubleshooting completed.
No
•  Replace the auto leveling control module.
5
INSPECT WIRING HARNESS BETWEEN HEADLIGHT LEVELING ACTUATOR AND CONTROL MODULE
•  Inspect the wiring harness between the following terminals.
?  Auto leveling control module terminal M and headlight leveling actuator (LH/RH) terminal L
?  Auto leveling control module terminal O and headlight leveling actuator (LH/RH) terminal M
?  Auto leveling control module terminal P and headlight leveling actuator (LH/RH) terminal I
•  Is there any open or short circuit in the wiring harness?
Yes
•  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals.
?  Auto leveling control module terminal M and headlight leveling actuator (LH/RH) terminal L
?  Auto leveling control module terminal O and headlight leveling actuator (LH/RH) terminal M
?  Auto leveling control module terminal P and headlight leveling actuator (LH/RH) terminal I
If there is a common connector:
?  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.
?  Repair or replace the malfunctioning part.
If there is no common connector:
?  Repair or replace the wiring harness which has an open or short circuit.
No
With auto leveling sensor:
•  Go to the next step.
Without auto leveling sensor:
•  Troubleshooting completed.
6
VERIFY AUTO-LEVELING SENSOR INSTALLATION
•  Verify the auto-leveling sensor installation condition?
•  Is a bracket bent, is there damage, or is a link disconnected?
Yes
Repair or replace the malfunctioning location.
No
Go to the next step.
7
AUTO LEVELING SENSOR INSPECTION
•  Inspect the auto leveling sensor.
•  Is the auto leveling sensor normal?
Yes
•  Replace the auto leveling control module.
No
Replace the auto leveling sensor.
(See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)


With Adaptive LED Headlights Control Module

Item
THE HEADLIGHT AUTO LEVELING SYSTEM DOES NOT OPERATE IN RESPONSE TO VEHICLE POSTURE
Description
•  The headlight auto-leveling system does operate in response to the number of occupants, cargo load in luggage compartment, and the fuel level.
•  One side of the headlight leveling actuator does not operate.
Possible Causes
•  Short or open circuit in the wiring harness between headlight leveling actuator and adaptive LED headlights control module
?  Adaptive LED headlights control module terminal F—Headlight leveling actuator (LH/RH) terminal J
?  Adaptive LED headlights control module terminal D—Headlight leveling actuator (LH/RH) terminal K
•  Headlight leveling actuator malfunction
•  Adaptive LED headlights control module malfunction
•  Poor installation of the auto leveling sensor (with auto leveling sensor)
•  Auto leveling sensor malfunction (with auto leveling sensor)

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE IF MALFUNCTIONING LOCATION IS AUTO-LEVELING SENSOR
•  Verify the malfunction symptom.
•  Do both sides of the headlight auto leveling system not operate?
Yes
Go to Step 5.
No
Go to the next step.
2
LEVELING OPERATION SIGNAL INSPECTION
•  Verify the headlight leveling actuator operation using the M-MDS.
•  Is the headlight leveling actuator normal?
Yes
Go to Step 6.
No
Go to the next step.
3
LEVELING OPERATION SIGNAL CIRCUIT INSPECTION
•  Inspect wiring harness between adaptive LED headlights control module on the side of the auto leveling system which does not operate and the headlight leveling actuator.
?  Adaptive LED headlights control module terminal F and headlight leveling actuator (LH/RH) terminal J
?  Adaptive LED headlights control module terminal D and headlight leveling actuator (LH/RH) terminal K
•  Is there any open or short circuit in the wiring harness?
Yes
•  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals.
?  Adaptive LED headlights control module terminal F and headlight leveling actuator (LH/RH) terminal J
?  Adaptive LED headlights control module terminal D and headlight leveling actuator (LH/RH) terminal K
If there is a common connector:
?  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.
?  Repair or replace the malfunctioning part.
If there is no common connector:
?  Repair or replace the wiring harness which has an open or short circuit.
No
Go to the next step.
4
HEADLIGHT LEVELING INSPECTION
•  Replace the front combination light on the side of the auto-leveling system that is not operating.
•  Does the auto-leveling system operate correctly?
Yes
Troubleshooting completed.
No
•  Replace the adaptive LED headlights control module.
5
INSPECT WIRING HARNESS BETWEEN HEADLIGHT LEVELING ACTUATOR AND CONTROL MODULE
•  Inspect the wiring harness between the following terminals.
?  Adaptive LED headlights control module terminal F and headlight leveling actuator (LH/RH) terminal J
?  Adaptive LED headlights control module terminal D and headlight leveling actuator (LH/RH) terminal K
•  Is there any open or short circuit in the wiring harness?
Yes
•  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals.
?  Adaptive LED headlights control module terminal F and headlight leveling actuator (LH/RH) terminal J
?  Adaptive LED headlights control module terminal D and headlight leveling actuator (LH/RH) terminal K
If there is a common connector:
?  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.
?  Repair or replace the malfunctioning part.
If there is no common connector:
?  Repair or replace the wiring harness which has an open or short circuit.
No
With auto leveling sensor:
•  Go to the next step.
Without auto leveling sensor:
•  Troubleshooting completed.
6
VERIFY AUTO-LEVELING SENSOR INSTALLATION
•  Verify the auto-leveling sensor installation condition?
•  Is a bracket bent, is there damage, or is a link disconnected?
Yes
Repair or replace the malfunctioning location.
No
Go to the next step.
7
AUTO LEVELING SENSOR INSPECTION
•  Inspect the auto leveling sensor.
•  Is the auto leveling sensor normal?
Yes
•  Replace the adaptive LED headlights control module.
No
Replace the auto leveling sensor.
(See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)