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

id0903d0013800

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].)

With Auto Leveling Control Module

Description

•  The headlight auto-leveling system does operate in response to the number of occupants, cargo load in trunk, and the fuel level.

•  One side of the headlight leveling actuator does not operate.

Possible malfunction

•  Short or open circuit in the wiring harness between headlight leveling actuator and auto leveling control module

•  Headlight leveling actuator malfunction

•  Auto leveling control module malfunction

•  Poor installation of the auto leveling sensor

•  Auto leveling sensor malfunction

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 4.
		No	Go to the next step.
2	LEVELING OPERATION SIGNAL INSPECTION •  Verify the headlight leveling actuator operation using the M-MDS. (See HEADLIGHT LEVELING ACTUATOR OPERATION CHECK MODE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].) •  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 operate and the headlight leveling actuator. RH ―  Auto leveling control module terminal P and headlight leveling actuator terminal F LH ―  Auto leveling control module terminal P and headlight leveling actuator terminal F •  Is there any open or short circuit in the wiring harness?	Yes	RH •  Refer to the wiring diagram and verify whether or not there is a common connector between auto leveling control module terminal P and headlight leveling actuator terminal F. 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. LH •  Refer to the wiring diagram and verify whether or not there is a common connector between auto leveling control module terminal P and headlight leveling actuator terminal F. 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. (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) •  Does the auto-leveling system operate correctly?	Yes	Troubleshooting completed.
		No	Replace the auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
5	INSPECT WIRING HARNESS BETWEEN HEADLIGHT LEVELING ACTUATOR AND AUTO LEVELING CONTROL MODULE •  Inspect the wiring harness between the following terminals. ―  Auto leveling control module terminal B and headlight leveling actuator (LH/RH) terminal I ―  Auto leveling control module terminal P and headlight leveling actuator (LH/RH) terminal F ―  Auto leveling control module terminal D and headlight leveling actuator (LH/RH) terminal L •  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 B 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between auto leveling control module terminal P and headlight leveling actuator (LH/RH) terminal F. 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between auto leveling control module terminal D and headlight leveling actuator (LH/RH) terminal L. 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.
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. (See AUTO LEVELING SENSOR INSPECTION.) •  Is the auto leveling sensor normal?	Yes	Replace the auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)

With AFS Control Module

Description

•  The headlight auto-leveling system does operate in response to the number of occupants, cargo load in trunk, and the fuel level.

•  One side of the headlight leveling actuator does not operate.

Possible malfunction

•  Short or open circuit in the wiring harness between headlight leveling actuator and AFS control module

•  Headlight leveling actuator malfunction

•  AFS control module malfunction

•  Poor installation of the auto leveling sensor

•  Auto leveling sensor malfunction

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 4.
		No	Go to the next step.
2	LEVELING OPERATION SIGNAL INSPECTION •  Verify the headlight leveling actuator operation using the M-MDS. (See HEADLIGHT LEVELING ACTUATOR OPERATION CHECK MODE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].) •  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 AFS control module on the side of the auto leveling system which does operate and the headlight leveling actuator. RH ―  AFS control module terminal P and headlight leveling actuator terminal F LH ―  AFS control module terminal P and headlight leveling actuator terminal F •  Is there any open or short circuit in the wiring harness?	Yes	RH •  Refer to the wiring diagram and verify whether or not there is a common connector between AFS control module terminal P and headlight leveling actuator terminal F. 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. LH •  Refer to the wiring diagram and verify whether or not there is a common connector between AFS control module terminal P and headlight leveling actuator terminal F. 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. (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) •  Does the auto-leveling system operate correctly?	Yes	Troubleshooting completed.
		No	Replace the AFS control module. (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)
5	INSPECT WIRING HARNESS BETWEEN HEADLIGHT LEVELING ACTUATOR AND AFS CONTROL MODULE •  Inspect the wiring harness between the following terminals. ―  AFS control module terminal B and headlight leveling actuator (LH/RH) terminal I ―  AFS control module terminal P and headlight leveling actuator (LH/RH) terminal F ―  AFS control module terminal D and headlight leveling actuator (LH/RH) terminal L •  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 AFS control module terminal B 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between AFS control module terminal P and headlight leveling actuator (LH/RH) terminal F. 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between AFS control module terminal D and headlight leveling actuator (LH/RH) terminal L. 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.
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. (See AUTO LEVELING SENSOR INSPECTION.) •  Is the auto leveling sensor normal?	Yes	Replace the AFS control module. (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)

With Adaptive LED Headlights Control Module

Description

•  The headlight auto-leveling system does operate in response to the number of occupants, cargo load in trunk, and the fuel level.

•  One side of the headlight leveling actuator does not operate.

Possible malfunction

•  Short or open circuit in the wiring harness between headlight leveling actuator and adaptive LED headlights control module

•  Headlight leveling actuator malfunction

•  Adaptive LED headlights control module malfunction

•  Poor installation of the auto leveling sensor

•  Auto leveling sensor malfunction

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 4.
		No	Go to the next step.
2	LEVELING OPERATION SIGNAL INSPECTION •  Verify the headlight leveling actuator operation using the M-MDS. (See HEADLIGHT LEVELING ACTUATOR OPERATION CHECK MODE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].) •  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 operate and the headlight leveling actuator. RH ―  Adaptive LED headlights control module terminal Y and headlight leveling actuator terminal J LH ―  Adaptive LED headlights control module terminal Y and headlight leveling actuator terminal J •  Is there any open or short circuit in the wiring harness?	Yes	RH •  Refer to the wiring diagram and verify whether or not there is a common connector between adaptive LED headlights control module terminal Y and headlight leveling actuator terminal J. 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. LH •  Refer to the wiring diagram and verify whether or not there is a common connector between adaptive LED headlights control module terminal Y and headlight leveling actuator terminal J. 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. (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) •  Does the auto-leveling system operate correctly?	Yes	Troubleshooting completed.
		No	Replace the adaptive LED headlights control module. (See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)
5	INSPECT WIRING HARNESS BETWEEN HEADLIGHT LEVELING ACTUATOR AND ADAPTIVE LED HEADLIGHTS CONTROL MODULE •  Inspect the wiring harness between the following terminals. ―  Adaptive LED headlights control module terminal G and headlight leveling actuator (LH/RH) terminal I ―  Adaptive LED headlights control module terminal Y and headlight leveling actuator (LH/RH) terminal J ―  Adaptive LED headlights control module terminal AC 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 adaptive LED headlights control module terminal G 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between adaptive LED headlights control module terminal Y and headlight leveling actuator (LH/RH) terminal J. 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. •  Refer to the wiring diagram and verify whether or not there is a common connector between adaptive LED headlights control module terminal AC 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.
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. (See AUTO LEVELING SENSOR INSPECTION.) •  Is the auto leveling sensor normal?	Yes	Replace the adaptive LED headlights control module. (See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Replace the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)