THE HEADLIGHT AUTO LEVELING SYSTEM DOES NOT OPERATE IN RESPONSE TO VEHICLE POSTURE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)]

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2014 - Mazda6 - Body and Accessories

THE HEADLIGHT AUTO LEVELING SYSTEM DOES NOT OPERATE IN RESPONSE TO VEHICLE POSTURE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)]

NOTE:

If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)] malfunction diagnosis according to the troubleshooting procedure.

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.
1		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)].) Is the headlight leveling actuator normal?	Yes	Go to Step 6.
2		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.
3		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.
4		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.
5		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.
6		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.)
7		No	Replace the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)

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