The Steering Responsive Headlight Operates In A Direction Different From The Target

Wiring diagram: 

• Headlight beam leveler system. Refer to WIRING SYSTEM>HEADLIGHT BEAM LEVELER SYSTEM>WIRING DIAGRAM .
• Headlight system. Refer to WIRING SYSTEM>HEADLIGHT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC. 
   1. Turn the ignition switch to OFF.
   2. Start the engine.
   3. Using the Subaru Select Monitor, clear the auto headlight beam leveler system memory. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>CLEAR MEMORY MODE .
   4. Use the Subaru Select Monitor and read DTCs. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

      Is the auto headlight beam leveler system DTC displayed? (Current malfunction)

      Yes:  Perform the diagnosis according to DTC. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

      No:  Go to  2.

2. CHECK DTC. 
   1. Using the Subaru Select Monitor, read all the DTCs. Refer to LAN SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

      Is a U-code DTC displayed? (Current malfunction)

      Yes:  Perform the inspection according to the diagnosis for LAN system. Refer to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

      No:  Go to  3.

3. CHECK DTC. 

   Check DTC of VDC.

   Is any DTC related to the vehicle speed and steering angle sensor detected?

   Yes:  Perform the diagnosis according to DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

   No:  Go to  4.

4. CHECK INITIALIZE FUNCTION. 

   Perform the function check (the initialize function) for the steering responsive headlight. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION>FUNCTION CHECK .

   Do the left and right headlights operate?

   Yes:  Go to  5.

   No

   • Only one side does not operate: Go to  13.
   • Both sides do not operate: Go to  12.
5. CHECK INPUT SIGNAL. 

   Display «Vehicle Speed Signal» and «Steering Angle Signal» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

   Is «Vehicle Speed Signal» 8 km/h (5 MPH) or less, and «Steering Angle Signal» 8.5 degree or less?

   Yes:  Go to  6.

   No:  Perform the diagnosis for VDC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

6. CHECK SWIVEL ACTUATOR POWER SUPPLY. 

   Using the Subaru Select Monitor, display «Left Steering Responsive Headlight Target Angle»«Right Steering Responsive Headlight Target Angle». Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

   Is the target angle 0 degree?

   Yes:  Go to  9.

   No:  Go to  7.

7. CHECK AUTO HEADLIGHT BEAM LEVELER Control Module POWER SUPPLY. 
   1. Turn the ignition switch to ON.
   2. Display «Control module voltage» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

      Is the voltage 8 - 16 V?

      Yes:  Go to  8.

      No:  Check the battery and fuse. If no fault is found, check the auto headlight beam leveler Control Module power supply circuit.

8. CHECK SWIVEL ACTUATOR POWER SUPPLY CIRCUIT. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the headlight assembly connector.
   3. Turn the ignition switch to ON.
   4. Using a tester, measure the voltage between headlight assembly connector and chassis ground.

      Connector & terminal

      (F126) No. 13 (+) - Chassis ground (-):

      (F125) No. 13 (+) - Chassis ground (-):

      Is the voltage 8 - 16 V?

      Yes:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

      No:  Check the battery and fuse. If no fault is found, check the swivel actuator power supply circuit.

9. CHECK SRH SWIVEL ACTUATOR CURRENT ANGLE. 

   Using the Subaru Select Monitor, display «Left Steering Responsive Headlight Current Angle»«Right Steering Responsive Headlight Current Angle». Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

   Is the current angle 0 degree?

   Yes:  Go to  12.

   No:  Go to  9.

10. CHECK SWIVEL ACTUATOR POWER SUPPLY. 

    Using the Subaru Select Monitor, display «Left Steering Responsive Headlight Power Supply Failure»«Right Steering Responsive Headlight Power Supply Failure». Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

    Is «Failure» displayed?

    Yes:  Check the battery and fuse. If no fault is found, check the swivel actuator power supply circuit.

    No:  Go to  11.

11. CHECK SWIVEL ACTUATOR POWER SUPPLY CIRCUIT. 
    1. Turn the ignition switch to OFF.
    2. Disconnect the headlight assembly connector.
    3. Turn the ignition switch to ON.
    4. Using a tester, measure the voltage between headlight assembly connector and chassis ground.

       Connector & terminal

       (F126) No. 13 (+) - Chassis ground (-):

       (F125) No. 13 (+) - Chassis ground (-):

       Is the voltage 8 - 16 V?

       Yes:  Replace the headlight assembly. Refer to LIGHTING SYSTEM>HEADLIGHT ASSEMBLY .

       No:  Check the battery and fuse. If no fault is found, check the swivel actuator power supply circuit.

12. CHECK AUTO HEADLIGHT BEAM LEVELER Control Module POWER SUPPLY. 
    1. Turn the ignition switch to OFF.
    2. Display «Control module voltage» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

       Is the voltage 8 - 16 V?

       Yes:  Go to  13.

       No:  Check the battery and fuse. If no fault is found, check the auto headlight beam leveler Control Module power supply circuit.

13. CHECK SWIVEL ACTUATOR POWER SUPPLY. 

    Using the Subaru Select Monitor, display «Left Steering Responsive Headlight Power Supply Failure»«Right Steering Responsive Headlight Power Supply Failure». Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

    Is «Failure» displayed?

    Yes:  Check the battery and fuse. If no fault is found, check the swivel actuator power supply circuit.

    No:  Go to  14.

14. CHECK SWIVEL ACTUATOR POWER SUPPLY CIRCUIT. 
    1. Turn the ignition switch to OFF.
    2. Disconnect the headlight assembly connector.
    3. Turn the ignition switch to ON.
    4. Using a tester, measure the voltage between headlight assembly connector and chassis ground.

       Connector & terminal

       (F126) No. 13 (+) - Chassis ground (-):

       (F125) No. 13 (+) - Chassis ground (-):

       Is the voltage 8 - 16 V?

       Yes:  Go to  15.

       No:  Check the battery and fuse. If no fault is found, check the swivel actuator power supply circuit.

15. PERFORM ACTIVE TEST FOR SWIVEL ACTUATOR. 

    Perform «Active Test» using the Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>ACTIVE TEST .

    Is the actuator current position value approximately the same as the input value of the actuator control position? (Within 1.2 seconds)

    Yes:  Go to  16.

    No:  When the value is not the same on one side only, replace the headlight assembly of the side where the same value is not achieved. Refer to LIGHTING SYSTEM>HEADLIGHT ASSEMBLY .

    When the value is not the same on both sides, replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

16. DRIVING CHECK. 

    Perform the road test to make sure there is no yawing.

    Is it yawing?

    Yes:  Check the vehicle alignment. Refer to FRONT SUSPENSION>WHEEL ALIGNMENT .

    No:  The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.